Mercurial > vim
annotate src/channel.c @ 7868:17e6ff1a74f1 v7.4.1231
commit https://github.com/vim/vim/commit/19d2f1589850d7db1ce77efec052929246f156e2
Author: Bram Moolenaar <Bram@vim.org>
Date: Mon Feb 1 21:38:19 2016 +0100
patch 7.4.1231
Problem: JSON messages are not parsed properly.
Solution: Queue received messages.
author | Christian Brabandt <cb@256bit.org> |
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date | Mon, 01 Feb 2016 21:45:06 +0100 |
parents | 6b0891de44a9 |
children | 4b9d4600166f |
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1 /* vi:set ts=8 sts=4 sw=4: |
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2 * |
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3 * VIM - Vi IMproved by Bram Moolenaar |
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4 * |
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5 * Do ":help uganda" in Vim to read copying and usage conditions. |
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6 * Do ":help credits" in Vim to see a list of people who contributed. |
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7 */ |
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8 |
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9 /* |
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10 * Implements communication through a socket or any file handle. |
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11 */ |
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12 |
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13 #include "vim.h" |
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14 |
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15 #if defined(FEAT_CHANNEL) || defined(PROTO) |
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16 |
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17 /* |
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18 * Change the zero to 1 to enable debugging. |
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19 * This will write a file "channel_debug.log". |
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20 */ |
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21 #if 0 |
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22 # define CHERROR(fmt, arg) cherror(fmt, arg) |
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23 # define CHLOG(idx, send, buf) chlog(idx, send, buf) |
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24 # define CHFILE "channel_debug.log" |
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25 |
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26 static void cherror(char *fmt, char *arg); |
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27 static void chlog(int send, char_u *buf); |
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28 #else |
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29 # define CHERROR(fmt, arg) |
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30 # define CHLOG(idx, send, buf) |
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31 #endif |
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32 |
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33 /* TRUE when netbeans is running with a GUI. */ |
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34 #ifdef FEAT_GUI |
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35 # define CH_HAS_GUI (gui.in_use || gui.starting) |
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36 #endif |
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37 |
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38 /* Note: when making changes here also adjust configure.in. */ |
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39 #ifdef WIN32 |
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40 /* WinSock API is separated from C API, thus we can't use read(), write(), |
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41 * errno... */ |
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42 # define SOCK_ERRNO errno = WSAGetLastError() |
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43 # undef ECONNREFUSED |
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44 # define ECONNREFUSED WSAECONNREFUSED |
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45 # ifdef EINTR |
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46 # undef EINTR |
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47 # endif |
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48 # define EINTR WSAEINTR |
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49 # define sock_write(sd, buf, len) send(sd, buf, len, 0) |
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50 # define sock_read(sd, buf, len) recv(sd, buf, len, 0) |
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51 # define sock_close(sd) closesocket(sd) |
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52 # define sleep(t) Sleep(t*1000) /* WinAPI Sleep() accepts milliseconds */ |
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53 #else |
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54 # include <netdb.h> |
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55 # include <netinet/in.h> |
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56 |
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57 # include <sys/socket.h> |
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58 # ifdef HAVE_LIBGEN_H |
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59 # include <libgen.h> |
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60 # endif |
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61 # define SOCK_ERRNO |
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62 # define sock_write(sd, buf, len) write(sd, buf, len) |
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63 # define sock_read(sd, buf, len) read(sd, buf, len) |
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64 # define sock_close(sd) close(sd) |
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65 #endif |
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66 |
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67 #ifdef FEAT_GUI_W32 |
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68 extern HWND s_hwnd; /* Gvim's Window handle */ |
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69 #endif |
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70 |
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71 struct readqueue |
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72 { |
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73 char_u *buffer; |
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74 struct readqueue *next; |
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75 struct readqueue *prev; |
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76 }; |
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77 typedef struct readqueue readq_T; |
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78 |
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79 struct jsonqueue |
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80 { |
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81 typval_T *value; |
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82 struct jsonqueue *next; |
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83 struct jsonqueue *prev; |
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84 }; |
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85 typedef struct jsonqueue jsonq_T; |
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86 |
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87 typedef struct { |
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88 sock_T ch_fd; /* the socket, -1 for a closed channel */ |
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89 int ch_idx; /* used by channel_poll_setup() */ |
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90 readq_T ch_head; /* dummy node, header for circular queue */ |
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91 |
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92 int ch_error; /* When TRUE an error was reported. Avoids giving |
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93 * pages full of error messages when the other side |
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94 * has exited, only mention the first error until the |
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95 * connection works again. */ |
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96 #ifdef FEAT_GUI_X11 |
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97 XtInputId ch_inputHandler; /* Cookie for input */ |
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98 #endif |
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99 #ifdef FEAT_GUI_GTK |
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100 gint ch_inputHandler; /* Cookie for input */ |
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101 #endif |
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102 #ifdef WIN32 |
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103 int ch_inputHandler; /* simply ret.value of WSAAsyncSelect() */ |
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104 #endif |
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105 |
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106 void (*ch_close_cb)(void); /* callback for when channel is closed */ |
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107 |
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108 char_u *ch_callback; /* function to call when a msg is not handled */ |
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109 char_u *ch_req_callback; /* function to call for current request */ |
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110 |
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111 int ch_json_mode; /* TRUE for a json channel */ |
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112 jsonq_T ch_json_head; /* dummy node, header for circular queue */ |
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113 } channel_T; |
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114 |
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115 /* |
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116 * Information about all channels. |
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117 * There can be gaps for closed channels, they will be reused later. |
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118 */ |
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119 static channel_T *channels = NULL; |
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120 static int channel_count = 0; |
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121 |
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122 /* |
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123 * TODO: open debug file when desired. |
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124 */ |
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125 FILE *debugfd = NULL; |
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126 |
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127 /* |
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128 * Add a new channel slot, return the index. |
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129 * The channel isn't actually used into ch_fd is set >= 0; |
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130 * Returns -1 if all channels are in use. |
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131 */ |
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132 static int |
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133 add_channel(void) |
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134 { |
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135 int idx; |
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136 channel_T *new_channels; |
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137 channel_T *ch; |
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138 |
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139 if (channels != NULL) |
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140 for (idx = 0; idx < channel_count; ++idx) |
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141 if (channels[idx].ch_fd < 0) |
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142 /* re-use a closed channel slot */ |
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143 return idx; |
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144 if (channel_count == MAX_OPEN_CHANNELS) |
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145 return -1; |
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146 new_channels = (channel_T *)alloc(sizeof(channel_T) * (channel_count + 1)); |
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147 if (new_channels == NULL) |
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148 return -1; |
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149 if (channels != NULL) |
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150 mch_memmove(new_channels, channels, sizeof(channel_T) * channel_count); |
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151 channels = new_channels; |
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152 ch = &channels[channel_count]; |
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153 (void)vim_memset(ch, 0, sizeof(channel_T)); |
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154 |
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155 ch->ch_fd = (sock_T)-1; |
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156 #ifdef FEAT_GUI_X11 |
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157 ch->ch_inputHandler = (XtInputId)NULL; |
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158 #endif |
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159 #ifdef FEAT_GUI_GTK |
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160 ch->ch_inputHandler = 0; |
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161 #endif |
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162 #ifdef FEAT_GUI_W32 |
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163 ch->ch_inputHandler = -1; |
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164 #endif |
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165 /* initialize circular queues */ |
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166 ch->ch_head.next = &ch->ch_head; |
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167 ch->ch_head.prev = &ch->ch_head; |
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168 ch->ch_json_head.next = &ch->ch_json_head; |
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169 ch->ch_json_head.prev = &ch->ch_json_head; |
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170 |
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171 return channel_count++; |
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172 } |
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173 |
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174 #if defined(FEAT_GUI) || defined(PROTO) |
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175 /* |
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176 * Read a command from netbeans. |
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177 */ |
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178 #ifdef FEAT_GUI_X11 |
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179 static void |
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180 messageFromNetbeans(XtPointer clientData, |
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181 int *unused1 UNUSED, |
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182 XtInputId *unused2 UNUSED) |
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183 { |
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184 channel_read((int)(long)clientData); |
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185 } |
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186 #endif |
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187 |
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188 #ifdef FEAT_GUI_GTK |
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189 static void |
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190 messageFromNetbeans(gpointer clientData, |
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191 gint unused1 UNUSED, |
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192 GdkInputCondition unused2 UNUSED) |
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193 { |
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194 channel_read((int)(long)clientData); |
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195 } |
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196 #endif |
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197 |
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198 static void |
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199 channel_gui_register(int idx) |
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200 { |
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201 channel_T *channel = &channels[idx]; |
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202 |
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203 if (!CH_HAS_GUI) |
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204 return; |
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205 |
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206 # ifdef FEAT_GUI_X11 |
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207 /* tell notifier we are interested in being called |
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208 * when there is input on the editor connection socket |
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209 */ |
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210 if (channel->ch_inputHandler == (XtInputId)NULL) |
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211 channel->ch_inputHandler = |
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212 XtAppAddInput((XtAppContext)app_context, channel->ch_fd, |
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213 (XtPointer)(XtInputReadMask + XtInputExceptMask), |
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214 messageFromNetbeans, (XtPointer)(long)idx); |
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215 # else |
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216 # ifdef FEAT_GUI_GTK |
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217 /* |
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218 * Tell gdk we are interested in being called when there |
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219 * is input on the editor connection socket |
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220 */ |
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221 if (channel->ch_inputHandler == 0) |
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222 channel->ch_inputHandler = |
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223 gdk_input_add((gint)channel->ch_fd, (GdkInputCondition) |
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224 ((int)GDK_INPUT_READ + (int)GDK_INPUT_EXCEPTION), |
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225 messageFromNetbeans, (gpointer)(long)idx); |
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226 # else |
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227 # ifdef FEAT_GUI_W32 |
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228 /* |
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229 * Tell Windows we are interested in receiving message when there |
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230 * is input on the editor connection socket. |
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231 */ |
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232 if (channel->ch_inputHandler == -1) |
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233 channel->ch_inputHandler = |
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234 WSAAsyncSelect(channel->ch_fd, s_hwnd, WM_NETBEANS, FD_READ); |
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235 # endif |
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236 # endif |
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237 # endif |
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238 } |
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239 |
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240 /* |
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241 * Register any of our file descriptors with the GUI event handling system. |
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242 * Called when the GUI has started. |
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243 */ |
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244 void |
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245 channel_gui_register_all(void) |
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246 { |
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247 int i; |
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248 |
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249 for (i = 0; i < channel_count; ++i) |
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250 if (channels[i].ch_fd >= 0) |
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251 channel_gui_register(i); |
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252 } |
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253 |
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254 static void |
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255 channel_gui_unregister(int idx) |
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256 { |
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257 channel_T *channel = &channels[idx]; |
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258 |
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259 # ifdef FEAT_GUI_X11 |
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260 if (channel->ch_inputHandler != (XtInputId)NULL) |
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261 { |
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262 XtRemoveInput(channel->ch_inputHandler); |
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263 channel->ch_inputHandler = (XtInputId)NULL; |
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264 } |
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265 # else |
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266 # ifdef FEAT_GUI_GTK |
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267 if (channel->ch_inputHandler != 0) |
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268 { |
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269 gdk_input_remove(channel->ch_inputHandler); |
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270 channel->ch_inputHandler = 0; |
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271 } |
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272 # else |
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273 # ifdef FEAT_GUI_W32 |
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274 if (channel->ch_inputHandler == 0) |
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275 { |
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276 WSAAsyncSelect(channel->ch_fd, s_hwnd, 0, 0); |
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277 channel->ch_inputHandler = -1; |
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278 } |
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279 # endif |
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280 # endif |
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281 # endif |
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282 } |
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283 |
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284 #endif |
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285 |
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286 /* |
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287 * Open a channel to "hostname":"port". |
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288 * Returns the channel number for success. |
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289 * Returns a negative number for failure. |
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290 */ |
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291 int |
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292 channel_open(char *hostname, int port_in, void (*close_cb)(void)) |
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293 { |
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294 int sd; |
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295 struct sockaddr_in server; |
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296 struct hostent * host; |
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297 #ifdef WIN32 |
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298 u_short port = port_in; |
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299 #else |
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300 int port = port_in; |
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301 #endif |
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302 int idx; |
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303 |
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304 #ifdef WIN32 |
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305 channel_init_winsock(); |
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306 #endif |
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307 |
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308 idx = add_channel(); |
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309 if (idx < 0) |
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310 { |
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311 CHERROR("All channels are in use\n", ""); |
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312 EMSG(_("E897: All channels are in use")); |
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313 return -1; |
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314 } |
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315 |
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316 if ((sd = (sock_T)socket(AF_INET, SOCK_STREAM, 0)) == (sock_T)-1) |
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317 { |
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318 CHERROR("error in socket() in channel_open()\n", ""); |
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319 PERROR("E898: socket() in channel_open()"); |
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320 return -1; |
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321 } |
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322 |
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323 /* Get the server internet address and put into addr structure */ |
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324 /* fill in the socket address structure and connect to server */ |
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325 vim_memset((char *)&server, 0, sizeof(server)); |
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326 server.sin_family = AF_INET; |
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327 server.sin_port = htons(port); |
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328 if ((host = gethostbyname(hostname)) == NULL) |
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329 { |
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330 CHERROR("error in gethostbyname() in channel_open()\n", ""); |
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331 PERROR("E901: gethostbyname() in channel_open()"); |
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332 sock_close(sd); |
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333 return -1; |
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334 } |
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335 memcpy((char *)&server.sin_addr, host->h_addr, host->h_length); |
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336 |
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337 /* Connect to server */ |
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338 if (connect(sd, (struct sockaddr *)&server, sizeof(server))) |
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339 { |
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340 SOCK_ERRNO; |
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341 CHERROR("channel_open: Connect failed with errno %d\n", errno); |
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342 if (errno == ECONNREFUSED) |
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343 { |
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344 sock_close(sd); |
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345 if ((sd = (sock_T)socket(AF_INET, SOCK_STREAM, 0)) == (sock_T)-1) |
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346 { |
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347 SOCK_ERRNO; |
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348 CHERROR("socket() retry in channel_open()\n", ""); |
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349 PERROR("E900: socket() retry in channel_open()"); |
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350 return -1; |
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351 } |
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352 if (connect(sd, (struct sockaddr *)&server, sizeof(server))) |
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353 { |
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354 int retries = 36; |
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355 int success = FALSE; |
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356 |
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357 SOCK_ERRNO; |
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358 while (retries-- && ((errno == ECONNREFUSED) |
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359 || (errno == EINTR))) |
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360 { |
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361 CHERROR("retrying...\n", ""); |
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362 mch_delay(3000L, TRUE); |
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363 ui_breakcheck(); |
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364 if (got_int) |
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365 { |
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366 errno = EINTR; |
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367 break; |
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368 } |
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369 if (connect(sd, (struct sockaddr *)&server, |
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370 sizeof(server)) == 0) |
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371 { |
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372 success = TRUE; |
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373 break; |
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374 } |
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375 SOCK_ERRNO; |
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376 } |
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377 if (!success) |
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378 { |
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379 /* Get here when the server can't be found. */ |
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380 CHERROR("Cannot connect to port after retry\n", ""); |
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381 PERROR(_("E899: Cannot connect to port after retry2")); |
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382 sock_close(sd); |
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383 return -1; |
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384 } |
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385 } |
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386 } |
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387 else |
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388 { |
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389 CHERROR("Cannot connect to port\n", ""); |
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390 PERROR(_("E902: Cannot connect to port")); |
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391 sock_close(sd); |
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392 return -1; |
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393 } |
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394 } |
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395 |
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396 channels[idx].ch_fd = sd; |
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397 channels[idx].ch_close_cb = close_cb; |
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398 |
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399 #ifdef FEAT_GUI |
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400 channel_gui_register(idx); |
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401 #endif |
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402 |
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403 return idx; |
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404 } |
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405 |
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406 /* |
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407 * Set the json mode of channel "idx" to TRUE or FALSE. |
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408 */ |
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409 void |
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410 channel_set_json_mode(int idx, int json_mode) |
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411 { |
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412 channels[idx].ch_json_mode = json_mode; |
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413 } |
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414 |
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415 /* |
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416 * Set the callback for channel "idx". |
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417 */ |
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418 void |
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419 channel_set_callback(int idx, char_u *callback) |
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420 { |
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421 vim_free(channels[idx].ch_callback); |
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422 channels[idx].ch_callback = vim_strsave(callback); |
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423 } |
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424 |
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425 /* |
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426 * Set the callback for channel "idx" for the next response. |
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427 */ |
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428 void |
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429 channel_set_req_callback(int idx, char_u *callback) |
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430 { |
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431 /* TODO: make a list of callbacks */ |
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432 vim_free(channels[idx].ch_req_callback); |
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433 channels[idx].ch_req_callback = callback == NULL |
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434 ? NULL : vim_strsave(callback); |
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435 } |
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436 |
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437 /* |
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438 * Invoke the "callback" on channel "idx". |
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439 */ |
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440 static void |
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441 invoke_callback(int idx, char_u *callback, typval_T *argv) |
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442 { |
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443 typval_T rettv; |
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444 int dummy; |
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445 |
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446 argv[0].v_type = VAR_NUMBER; |
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447 argv[0].vval.v_number = idx; |
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448 |
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449 call_func(callback, (int)STRLEN(callback), |
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450 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL); |
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451 /* If an echo command was used the cursor needs to be put back where |
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452 * it belongs. */ |
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453 setcursor(); |
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454 cursor_on(); |
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455 out_flush(); |
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456 } |
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457 |
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458 /* |
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459 * Return the first buffer from the channel and remove it. |
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460 * The caller must free it. |
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461 * Returns NULL if there is nothing. |
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462 */ |
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463 char_u * |
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464 channel_get(int idx) |
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465 { |
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466 readq_T *head = &channels[idx].ch_head; |
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467 readq_T *node; |
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468 char_u *p; |
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469 |
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470 if (head->next == head || head->next == NULL) |
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471 return NULL; |
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472 node = head->next; |
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473 /* dispose of the node but keep the buffer */ |
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474 p = node->buffer; |
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475 head->next = node->next; |
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476 node->next->prev = node->prev; |
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477 vim_free(node); |
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478 return p; |
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479 } |
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480 |
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481 /* |
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482 * Returns the whole buffer contents concatenated. |
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483 */ |
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484 static char_u * |
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485 channel_get_all(int idx) |
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486 { |
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487 /* Concatenate everything into one buffer. |
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488 * TODO: avoid multiple allocations. */ |
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489 while (channel_collapse(idx) == OK) |
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490 ; |
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491 return channel_get(idx); |
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492 } |
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493 |
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494 /* |
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495 * Collapses the first and second buffer in the channel "idx". |
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496 * Returns FAIL if that is not possible. |
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497 */ |
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498 int |
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499 channel_collapse(int idx) |
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500 { |
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501 readq_T *head = &channels[idx].ch_head; |
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502 readq_T *node = head->next; |
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503 char_u *p; |
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504 |
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505 if (node == head || node == NULL || node->next == head) |
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506 return FAIL; |
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507 |
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508 p = alloc((unsigned)(STRLEN(node->buffer) |
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509 + STRLEN(node->next->buffer) + 1)); |
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510 if (p == NULL) |
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511 return FAIL; /* out of memory */ |
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512 STRCPY(p, node->buffer); |
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513 STRCAT(p, node->next->buffer); |
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514 vim_free(node->next->buffer); |
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515 node->next->buffer = p; |
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516 |
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517 /* dispose of the node and buffer */ |
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518 head->next = node->next; |
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519 node->next->prev = node->prev; |
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520 vim_free(node->buffer); |
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521 vim_free(node); |
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522 return OK; |
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523 } |
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524 |
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525 /* |
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526 * Use the read buffer of channel "ch_idx" and parse JSON messages that are |
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527 * complete. The messages are added to the queue. |
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528 */ |
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529 void |
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530 channel_read_json(int ch_idx) |
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531 { |
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532 js_read_T reader; |
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533 typval_T listtv; |
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534 jsonq_T *item; |
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535 jsonq_T *head = &channels[ch_idx].ch_json_head; |
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536 |
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537 if (channel_peek(ch_idx) == NULL) |
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538 return; |
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539 |
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540 /* TODO: make reader work properly */ |
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541 /* reader.js_buf = channel_peek(ch_idx); */ |
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542 reader.js_buf = channel_get_all(ch_idx); |
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543 reader.js_eof = TRUE; |
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544 /* reader.js_eof = FALSE; */ |
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545 reader.js_used = 0; |
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546 /* reader.js_fill = channel_fill; */ |
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547 reader.js_cookie = &ch_idx; |
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548 if (json_decode(&reader, &listtv) == OK) |
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549 { |
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550 item = (jsonq_T *)alloc((unsigned)sizeof(jsonq_T)); |
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551 if (item == NULL) |
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552 clear_tv(&listtv); |
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553 else |
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554 { |
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555 item->value = alloc_tv(); |
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556 if (item->value == NULL) |
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557 { |
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558 vim_free(item); |
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559 clear_tv(&listtv); |
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560 } |
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561 else |
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562 { |
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563 *item->value = listtv; |
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564 item->prev = head->prev; |
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565 head->prev = item; |
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566 item->next = head; |
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567 item->prev->next = item; |
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568 } |
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569 } |
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570 } |
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571 } |
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572 |
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573 /* |
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574 * Remove "node" from the queue that it is in and free it. |
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575 * Caller should have freed or used node->value. |
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576 */ |
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577 static void |
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578 remove_json_node(jsonq_T *node) |
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579 { |
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580 node->prev->next = node->next; |
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581 node->next->prev = node->prev; |
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582 vim_free(node); |
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583 } |
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584 |
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585 /* |
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586 * Get a message from the JSON queue for channel "ch_idx". |
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587 * When "id" is positive it must match the first number in the list. |
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588 * When "id" is zero or negative jut get the first message. |
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589 * Return OK when found and return the value in "rettv". |
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590 * Return FAIL otherwise. |
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591 */ |
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592 static int |
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593 channel_get_json(int ch_idx, int id, typval_T **rettv) |
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594 { |
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595 jsonq_T *head = &channels[ch_idx].ch_json_head; |
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596 jsonq_T *item = head->next; |
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597 |
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598 while (item != head) |
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599 { |
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600 list_T *l = item->value->vval.v_list; |
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601 typval_T *tv = &l->lv_first->li_tv; |
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602 |
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603 if ((id > 0 && tv->v_type == VAR_NUMBER && tv->vval.v_number == id) |
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604 || id <= 0) |
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605 { |
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606 *rettv = item->value; |
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607 remove_json_node(item); |
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608 return OK; |
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609 } |
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610 item = item->next; |
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611 } |
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612 return FAIL; |
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613 } |
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614 |
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615 /* |
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616 * Execute a command received over channel "idx". |
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617 * "cmd" is the command string, "arg2" the second argument. |
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618 * "arg3" is the third argument, NULL if missing. |
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619 */ |
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620 static void |
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621 channel_exe_cmd(int idx, char_u *cmd, typval_T *arg2, typval_T *arg3) |
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622 { |
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623 char_u *arg; |
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624 |
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625 if (arg2->v_type != VAR_STRING) |
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626 { |
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627 if (p_verbose > 2) |
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628 EMSG("E903: received ex command with non-string argument"); |
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629 return; |
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630 } |
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631 arg = arg2->vval.v_string; |
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632 |
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633 if (STRCMP(cmd, "ex") == 0) |
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634 { |
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635 do_cmdline_cmd(arg); |
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636 } |
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637 else if (STRCMP(cmd, "normal") == 0) |
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638 { |
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639 exarg_T ea; |
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640 |
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641 ea.arg = arg; |
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642 ea.addr_count = 0; |
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643 ea.forceit = TRUE; /* no mapping */ |
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644 ex_normal(&ea); |
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645 } |
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646 else if (STRCMP(cmd, "redraw") == 0) |
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647 { |
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648 exarg_T ea; |
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649 |
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650 ea.forceit = arg != NULL && *arg != NUL; |
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651 ex_redraw(&ea); |
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652 showruler(FALSE); |
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653 setcursor(); |
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654 out_flush(); |
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655 #ifdef FEAT_GUI |
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656 if (gui.in_use) |
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657 { |
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658 gui_update_cursor(FALSE, FALSE); |
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659 gui_mch_flush(); |
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660 } |
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661 #endif |
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662 } |
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663 else if (STRCMP(cmd, "expr") == 0 || STRCMP(cmd, "eval") == 0) |
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664 { |
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665 int is_eval = cmd[1] == 'v'; |
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666 |
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667 if (is_eval && arg3->v_type != VAR_NUMBER) |
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668 { |
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669 if (p_verbose > 2) |
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670 EMSG("E904: third argument for eval must be a number"); |
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671 } |
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672 else |
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673 { |
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674 typval_T *tv = eval_expr(arg, NULL); |
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675 typval_T err_tv; |
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676 char_u *json; |
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677 |
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678 if (is_eval) |
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679 { |
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680 if (tv == NULL) |
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681 { |
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682 err_tv.v_type = VAR_STRING; |
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683 err_tv.vval.v_string = (char_u *)"ERROR"; |
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684 tv = &err_tv; |
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685 } |
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686 json = json_encode_nr_expr(arg3->vval.v_number, tv); |
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687 channel_send(idx, json, "eval"); |
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688 vim_free(json); |
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689 } |
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690 free_tv(tv); |
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691 } |
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692 } |
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693 else if (p_verbose > 2) |
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694 EMSG2("E905: received unknown command: %s", cmd); |
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695 } |
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696 |
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697 /* |
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698 * Invoke a callback for channel "idx" if needed. |
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699 */ |
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700 static void |
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701 may_invoke_callback(int idx) |
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702 { |
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703 char_u *msg = NULL; |
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704 typval_T *listtv = NULL; |
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705 list_T *list; |
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706 typval_T *typetv; |
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707 typval_T argv[3]; |
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708 int seq_nr = -1; |
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709 int json_mode = channels[idx].ch_json_mode; |
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710 |
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711 if (channel_peek(idx) == NULL) |
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712 return; |
7868
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713 if (channels[idx].ch_close_cb != NULL) |
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714 /* this channel is handled elsewhere (netbeans) */ |
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715 return; |
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716 |
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717 if (json_mode) |
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718 { |
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719 /* Get any json message. Return if there isn't one. */ |
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720 channel_read_json(idx); |
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721 if (channel_get_json(idx, -1, &listtv) == FAIL) |
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722 return; |
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723 if (listtv->v_type != VAR_LIST) |
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724 { |
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725 /* TODO: give error */ |
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726 clear_tv(listtv); |
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727 return; |
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728 } |
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729 |
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730 list = listtv->vval.v_list; |
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731 if (list->lv_len < 2) |
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732 { |
7868
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733 /* TODO: give error */ |
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734 clear_tv(listtv); |
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735 return; |
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736 } |
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737 |
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738 argv[1] = list->lv_first->li_next->li_tv; |
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739 typetv = &list->lv_first->li_tv; |
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740 if (typetv->v_type == VAR_STRING) |
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741 { |
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742 typval_T *arg3 = NULL; |
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743 char_u *cmd = typetv->vval.v_string; |
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744 |
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745 /* ["cmd", arg] */ |
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746 if (list->lv_len == 3) |
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747 arg3 = &list->lv_last->li_tv; |
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748 channel_exe_cmd(idx, cmd, &argv[1], arg3); |
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749 clear_tv(listtv); |
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750 return; |
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751 } |
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752 |
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753 if (typetv->v_type != VAR_NUMBER) |
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754 { |
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755 /* TODO: give error */ |
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756 clear_tv(listtv); |
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|
757 return; |
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758 } |
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759 seq_nr = typetv->vval.v_number; |
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760 } |
7788
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761 else |
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762 { |
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763 /* For a raw channel we don't know where the message ends, just get |
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764 * everything. */ |
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765 msg = channel_get_all(idx); |
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766 argv[1].v_type = VAR_STRING; |
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767 argv[1].vval.v_string = msg; |
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768 } |
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769 |
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770 if (channels[idx].ch_req_callback != NULL && seq_nr != 0) |
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771 { |
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772 /* TODO: check the sequence number */ |
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773 /* invoke the one-time callback */ |
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774 invoke_callback(idx, channels[idx].ch_req_callback, argv); |
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775 channels[idx].ch_req_callback = NULL; |
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776 } |
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777 else if (channels[idx].ch_callback != NULL) |
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778 { |
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|
779 /* invoke the channel callback */ |
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780 invoke_callback(idx, channels[idx].ch_callback, argv); |
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781 } |
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782 /* else: drop the message TODO: give error */ |
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783 |
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784 if (listtv != NULL) |
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785 clear_tv(listtv); |
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786 vim_free(msg); |
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787 } |
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788 |
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789 /* |
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790 * Return TRUE when channel "idx" is open. |
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791 * Also returns FALSE or invalid "idx". |
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792 */ |
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|
793 int |
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|
794 channel_is_open(int idx) |
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795 { |
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796 return idx >= 0 && idx < channel_count && channels[idx].ch_fd >= 0; |
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797 } |
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798 |
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799 /* |
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800 * Close channel "idx". |
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801 * This does not trigger the close callback. |
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802 */ |
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803 void |
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|
804 channel_close(int idx) |
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805 { |
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806 channel_T *channel = &channels[idx]; |
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807 jsonq_T *jhead; |
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808 |
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809 if (channel->ch_fd >= 0) |
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810 { |
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|
811 sock_close(channel->ch_fd); |
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812 channel->ch_fd = -1; |
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813 channel->ch_close_cb = NULL; |
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814 #ifdef FEAT_GUI |
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815 channel_gui_unregister(idx); |
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816 #endif |
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817 vim_free(channel->ch_callback); |
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818 channel->ch_callback = NULL; |
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819 |
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820 while (channel_peek(idx) != NULL) |
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821 vim_free(channel_get(idx)); |
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822 |
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823 jhead = &channel->ch_json_head; |
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824 while (jhead->next != jhead) |
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825 { |
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826 clear_tv(jhead->next->value); |
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827 remove_json_node(jhead->next); |
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828 } |
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829 } |
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830 } |
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831 |
7770
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832 /* |
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833 * Store "buf[len]" on channel "idx". |
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834 * Returns OK or FAIL. |
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835 */ |
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836 int |
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837 channel_save(int idx, char_u *buf, int len) |
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838 { |
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839 readq_T *node; |
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840 readq_T *head = &channels[idx].ch_head; |
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841 |
7868
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842 node = (readq_T *)alloc(sizeof(readq_T)); |
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843 if (node == NULL) |
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844 return FAIL; /* out of memory */ |
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845 node->buffer = alloc(len + 1); |
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846 if (node->buffer == NULL) |
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847 { |
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848 vim_free(node); |
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849 return FAIL; /* out of memory */ |
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850 } |
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851 mch_memmove(node->buffer, buf, (size_t)len); |
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852 node->buffer[len] = NUL; |
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853 |
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854 /* insert node at tail of queue */ |
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855 node->next = head; |
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856 node->prev = head->prev; |
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857 head->prev->next = node; |
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858 head->prev = node; |
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859 |
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860 if (debugfd != NULL) |
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861 { |
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|
862 fprintf(debugfd, "RECV on %d: ", idx); |
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863 if (fwrite(buf, len, 1, debugfd) != 1) |
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864 return FAIL; |
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865 fprintf(debugfd, "\n"); |
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866 } |
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867 return OK; |
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868 } |
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869 |
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870 /* |
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871 * Return the first buffer from the channel without removing it. |
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872 * Returns NULL if there is nothing. |
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873 */ |
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874 char_u * |
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875 channel_peek(int idx) |
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876 { |
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877 readq_T *head = &channels[idx].ch_head; |
7770
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878 |
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879 if (head->next == head || head->next == NULL) |
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880 return NULL; |
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881 return head->next->buffer; |
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882 } |
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883 |
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884 /* |
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885 * Clear the read buffer on channel "idx". |
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886 */ |
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887 void |
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888 channel_clear(int idx) |
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889 { |
7868
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890 readq_T *head = &channels[idx].ch_head; |
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891 readq_T *node = head->next; |
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892 readq_T *next; |
7770
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893 |
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894 while (node != NULL && node != head) |
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895 { |
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896 next = node->next; |
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897 vim_free(node->buffer); |
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898 vim_free(node); |
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899 if (next == head) |
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900 { |
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901 head->next = head; |
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902 head->prev = head; |
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903 break; |
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904 } |
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905 node = next; |
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906 } |
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907 } |
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|
908 |
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909 /* Sent when the channel is found closed when reading. */ |
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910 #define DETACH_MSG "\"DETACH\"\n" |
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911 |
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|
912 /* Buffer size for reading incoming messages. */ |
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913 #define MAXMSGSIZE 4096 |
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914 |
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915 /* |
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916 * Check for reading from "fd" with "timeout" msec. |
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917 * Return FAIL when there is nothing to read. |
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918 */ |
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|
919 static int |
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920 channel_wait(int fd, int timeout) |
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|
921 { |
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922 #ifdef HAVE_SELECT |
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923 struct timeval tval; |
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924 fd_set rfds; |
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925 int ret; |
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926 |
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|
927 FD_ZERO(&rfds); |
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928 FD_SET(fd, &rfds); |
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929 tval.tv_sec = timeout / 1000; |
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930 tval.tv_usec = (timeout % 1000) * 1000; |
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931 for (;;) |
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932 { |
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933 ret = select(fd + 1, &rfds, NULL, NULL, &tval); |
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934 # ifdef EINTR |
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935 if (ret == -1 && errno == EINTR) |
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936 continue; |
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937 # endif |
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938 if (ret <= 0) |
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939 return FAIL; |
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940 break; |
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941 } |
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942 #else |
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943 # ifdef HAVE_POLL |
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944 struct pollfd fds; |
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945 |
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946 fds.fd = fd; |
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947 fds.events = POLLIN; |
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948 if (poll(&fds, 1, timeout) <= 0) |
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949 return FAIL; |
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950 # endif |
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951 #endif |
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952 return OK; |
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953 } |
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954 |
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955 /* |
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956 * Return a unique ID to be used in a message. |
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957 */ |
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958 int |
7817
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959 channel_get_id(void) |
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960 { |
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961 static int next_id = 1; |
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962 |
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963 return next_id++; |
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964 } |
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965 |
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966 /* |
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967 * Read from channel "idx" for as long as there is something to read. |
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968 * The data is put in the read queue. |
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969 */ |
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970 void |
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971 channel_read(int idx) |
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972 { |
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973 static char_u *buf = NULL; |
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974 int len = 0; |
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975 int readlen = 0; |
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976 channel_T *channel = &channels[idx]; |
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977 |
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978 if (channel->ch_fd < 0) |
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979 { |
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980 CHLOG(idx, FALSE, "channel_read() called while socket is closed\n"); |
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981 return; |
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982 } |
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983 |
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984 /* Allocate a buffer to read into. */ |
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985 if (buf == NULL) |
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986 { |
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987 buf = alloc(MAXMSGSIZE); |
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988 if (buf == NULL) |
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989 return; /* out of memory! */ |
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990 } |
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991 |
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992 /* Keep on reading for as long as there is something to read. |
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993 * Use select() or poll() to avoid blocking on a message that is exactly |
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994 * MAXMSGSIZE long. */ |
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995 for (;;) |
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996 { |
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997 if (channel_wait(channel->ch_fd, 0) == FAIL) |
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998 break; |
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999 len = sock_read(channel->ch_fd, buf, MAXMSGSIZE); |
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1000 if (len <= 0) |
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1001 break; /* error or nothing more to read */ |
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1002 |
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1003 /* Store the read message in the queue. */ |
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1004 channel_save(idx, buf, len); |
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1005 readlen += len; |
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1006 if (len < MAXMSGSIZE) |
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1007 break; /* did read everything that's available */ |
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1008 } |
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1009 |
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1010 /* Reading a socket disconnection (readlen == 0), or a socket error. */ |
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1011 if (readlen <= 0) |
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1012 { |
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1013 /* Queue a "DETACH" netbeans message in the command queue in order to |
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1014 * terminate the netbeans session later. Do not end the session here |
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1015 * directly as we may be running in the context of a call to |
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1016 * netbeans_parse_messages(): |
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1017 * netbeans_parse_messages |
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1018 * -> autocmd triggered while processing the netbeans cmd |
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1019 * -> ui_breakcheck |
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1020 * -> gui event loop or select loop |
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1021 * -> channel_read() |
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1022 */ |
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1023 channel_save(idx, (char_u *)DETACH_MSG, (int)STRLEN(DETACH_MSG)); |
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1024 |
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1025 channel_close(idx); |
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1026 if (channel->ch_close_cb != NULL) |
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1027 (*channel->ch_close_cb)(); |
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1028 |
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1029 if (len < 0) |
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1030 { |
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1031 /* Todo: which channel? */ |
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1032 CHERROR("%s(): cannot from channel\n", "channel_read"); |
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1033 PERROR(_("E896: read from channel")); |
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1034 } |
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1035 } |
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1036 |
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1037 #if defined(CH_HAS_GUI) && defined(FEAT_GUI_GTK) |
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1038 if (CH_HAS_GUI && gtk_main_level() > 0) |
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1039 gtk_main_quit(); |
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1040 #endif |
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1041 } |
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1042 |
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1043 /* |
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1044 * Read from raw channel "idx". Blocks until there is something to read or |
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1045 * the timeout expires. |
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1046 * Returns what was read in allocated memory. |
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1047 * Returns NULL in case of error or timeout. |
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1048 */ |
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1049 char_u * |
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1050 channel_read_block(int idx) |
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1051 { |
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1052 if (channel_peek(idx) == NULL) |
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1053 { |
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1054 /* Wait for up to 2 seconds. |
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1055 * TODO: use timeout set on the channel. */ |
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1056 if (channel_wait(channels[idx].ch_fd, 2000) == FAIL) |
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1057 return NULL; |
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1058 channel_read(idx); |
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1059 } |
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1060 |
7868
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1061 return channel_get_all(idx); |
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1062 } |
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1063 |
7868
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1064 /* |
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1065 * Read one JSON message from channel "ch_idx" with ID "id" and store the |
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1066 * result in "rettv". |
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1067 * Blocks until the message is received. |
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1068 */ |
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1069 int |
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1070 channel_read_json_block(int ch_idx, int id, typval_T **rettv) |
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1071 { |
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1072 for (;;) |
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1073 { |
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1074 channel_read_json(ch_idx); |
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1075 |
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1076 /* search for messsage "id" */ |
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1077 if (channel_get_json(ch_idx, id, rettv) == OK) |
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1078 return OK; |
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1079 |
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1080 /* Wait for up to 2 seconds. |
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1081 * TODO: use timeout set on the channel. */ |
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1082 if (channel_wait(channels[ch_idx].ch_fd, 2000) == FAIL) |
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1083 break; |
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1084 channel_read(ch_idx); |
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1085 } |
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1086 return FAIL; |
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1087 } |
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1088 |
7797
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1089 # if defined(WIN32) || defined(PROTO) |
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1090 /* |
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1091 * Lookup the channel index from the socket. |
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1092 * Returns -1 when the socket isn't found. |
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1093 */ |
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1094 int |
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1095 channel_socket2idx(sock_T fd) |
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1096 { |
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1097 int i; |
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1098 |
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1099 if (fd >= 0) |
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1100 for (i = 0; i < channel_count; ++i) |
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1101 if (channels[i].ch_fd == fd) |
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1102 return i; |
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1103 return -1; |
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1104 } |
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1105 # endif |
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1106 |
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1107 /* |
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1108 * Write "buf" (NUL terminated string) to channel "idx". |
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1109 * When "fun" is not NULL an error message might be given. |
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1110 * Return FAIL or OK. |
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1111 */ |
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1112 int |
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1113 channel_send(int idx, char_u *buf, char *fun) |
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1114 { |
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1115 channel_T *channel = &channels[idx]; |
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1116 int len = (int)STRLEN(buf); |
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1117 |
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1118 if (channel->ch_fd < 0) |
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1119 { |
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1120 if (!channel->ch_error && fun != NULL) |
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1121 { |
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1122 CHERROR(" %s(): write while not connected\n", fun); |
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1123 EMSG2("E630: %s(): write while not connected", fun); |
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1124 } |
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1125 channel->ch_error = TRUE; |
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1126 return FAIL; |
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1127 } |
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1128 |
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1129 if (sock_write(channel->ch_fd, buf, len) != len) |
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1130 { |
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1131 if (!channel->ch_error && fun != NULL) |
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1132 { |
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1133 CHERROR(" %s(): write failed\n", fun); |
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1134 EMSG2("E631: %s(): write failed", fun); |
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1135 } |
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1136 channel->ch_error = TRUE; |
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1137 return FAIL; |
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1138 } |
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1139 |
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1140 channel->ch_error = FALSE; |
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1141 return OK; |
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1142 } |
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1143 |
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1144 # if (defined(UNIX) && !defined(HAVE_SELECT)) || defined(PROTO) |
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1145 /* |
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1146 * Add open channels to the poll struct. |
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1147 * Return the adjusted struct index. |
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1148 * The type of "fds" is hidden to avoid problems with the function proto. |
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1149 */ |
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1150 int |
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1151 channel_poll_setup(int nfd_in, void *fds_in) |
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1152 { |
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1153 int nfd = nfd_in; |
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1154 int i; |
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1155 struct pollfd *fds = fds_in; |
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1156 |
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1157 for (i = 0; i < channel_count; ++i) |
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1158 if (channels[i].ch_fd >= 0) |
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1159 { |
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1160 channels[i].ch_idx = nfd; |
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1161 fds[nfd].fd = channels[i].ch_fd; |
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1162 fds[nfd].events = POLLIN; |
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1163 nfd++; |
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1164 } |
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1165 else |
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1166 channels[i].ch_idx = -1; |
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1167 |
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1168 return nfd; |
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1169 } |
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1170 |
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1171 /* |
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1172 * The type of "fds" is hidden to avoid problems with the function proto. |
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1173 */ |
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1174 int |
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1175 channel_poll_check(int ret_in, void *fds_in) |
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1176 { |
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1177 int ret = ret_in; |
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1178 int i; |
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1179 struct pollfd *fds = fds_in; |
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1180 |
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1181 for (i = 0; i < channel_count; ++i) |
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1182 if (ret > 0 && channels[i].ch_idx != -1 |
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1183 && fds[channels[i].ch_idx].revents & POLLIN) |
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1184 { |
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1185 channel_read(i); |
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1186 --ret; |
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1187 } |
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1188 |
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1189 return ret; |
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1190 } |
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1191 # endif /* UNIX && !HAVE_SELECT */ |
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1192 |
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1193 # if (!defined(FEAT_GUI_W32) && defined(HAVE_SELECT)) || defined(PROTO) |
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1194 /* |
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1195 * The type of "rfds" is hidden to avoid problems with the function proto. |
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1196 */ |
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1197 int |
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1198 channel_select_setup(int maxfd_in, void *rfds_in) |
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1199 { |
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1200 int maxfd = maxfd_in; |
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1201 int i; |
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1202 fd_set *rfds = rfds_in; |
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1203 |
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1204 for (i = 0; i < channel_count; ++i) |
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1205 if (channels[i].ch_fd >= 0) |
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1206 { |
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1207 FD_SET(channels[i].ch_fd, rfds); |
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1208 if (maxfd < channels[i].ch_fd) |
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1209 maxfd = channels[i].ch_fd; |
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1210 } |
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1211 |
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1212 return maxfd; |
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1213 } |
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1214 |
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1215 /* |
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1216 * The type of "rfds" is hidden to avoid problems with the function proto. |
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1217 */ |
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1218 int |
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1219 channel_select_check(int ret_in, void *rfds_in) |
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1220 { |
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1221 int ret = ret_in; |
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1222 int i; |
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1223 fd_set *rfds = rfds_in; |
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1224 |
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1225 for (i = 0; i < channel_count; ++i) |
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1226 if (ret > 0 && channels[i].ch_fd >= 0 |
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1227 && FD_ISSET(channels[i].ch_fd, rfds)) |
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1228 { |
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1229 channel_read(i); |
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1230 --ret; |
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1231 } |
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1232 |
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1233 return ret; |
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1234 } |
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1235 # endif /* !FEAT_GUI_W32 && HAVE_SELECT */ |
7743
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1236 |
7840
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1237 /* |
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1238 * Invoked from the main loop when it's save to execute received commands. |
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1239 */ |
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1240 void |
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1241 channel_parse_messages(void) |
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1242 { |
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1243 int i; |
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1244 |
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1245 for (i = 0; i < channel_count; ++i) |
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1246 may_invoke_callback(i); |
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1247 } |
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1248 |
7743
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1249 #endif /* FEAT_CHANNEL */ |