Mercurial > dovecot > original-hg > dovecot-1.2
annotate src/imap/client.c @ 2462:9946b489d21a HEAD
fix
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Sun, 22 Aug 2004 15:02:48 +0300 |
parents | 3accbeb04383 |
children | b7eec64e0735 |
rev | line source |
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1 /* Copyright (C) 2002-2004 Timo Sirainen */ |
0 | 2 |
3 #include "common.h" | |
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4 #include "ioloop.h" |
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5 #include "network.h" |
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6 #include "istream.h" |
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7 #include "ostream.h" |
0 | 8 #include "commands.h" |
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9 #include "namespace.h" |
0 | 10 |
11 #include <stdlib.h> | |
12 | |
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13 extern struct mail_storage_callbacks mail_storage_callbacks; |
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14 |
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15 static struct client *my_client; /* we don't need more than one currently */ |
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16 static struct timeout *to_idle; |
0 | 17 |
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18 static void client_output(void *context); |
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19 |
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20 struct client *client_create(int hin, int hout, struct namespace *namespaces) |
0 | 21 { |
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22 struct client *client; |
0 | 23 |
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24 /* always use nonblocking I/O */ |
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25 net_set_nonblock(hin, TRUE); |
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26 net_set_nonblock(hout, TRUE); |
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27 |
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28 client = i_new(struct client, 1); |
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29 client->input = i_stream_create_file(hin, default_pool, |
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30 imap_max_line_length, FALSE); |
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31 client->output = o_stream_create_file(hout, default_pool, |
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32 (size_t)-1, FALSE); |
0 | 33 |
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34 o_stream_set_flush_callback(client->output, client_output, client); |
0 | 35 |
2460 | 36 client->io = io_add(hin, IO_READ, _client_input, client); |
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37 client->parser = imap_parser_create(client->input, client->output, |
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38 imap_max_line_length); |
0 | 39 client->last_input = ioloop_time; |
40 | |
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41 client->cmd_pool = pool_alloconly_create("command pool", 8192); |
1958 | 42 client->keywords.pool = pool_alloconly_create("mailbox_keywords", 512); |
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43 client->namespaces = namespaces; |
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44 |
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45 while (namespaces != NULL) { |
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46 mail_storage_set_callbacks(namespaces->storage, |
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47 &mail_storage_callbacks, client); |
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48 namespaces = namespaces->next; |
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49 } |
0 | 50 |
51 i_assert(my_client == NULL); | |
52 my_client = client; | |
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53 |
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54 if (hook_client_created != NULL) |
1643 | 55 hook_client_created(&client); |
0 | 56 return client; |
57 } | |
58 | |
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59 void client_destroy(struct client *client) |
0 | 60 { |
61 if (client->mailbox != NULL) | |
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62 mailbox_close(client->mailbox); |
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63 namespace_deinit(client->namespaces); |
0 | 64 |
65 imap_parser_destroy(client->parser); | |
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66 if (client->io != NULL) |
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67 io_remove(client->io); |
0 | 68 |
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69 i_stream_unref(client->input); |
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70 o_stream_unref(client->output); |
0 | 71 |
1958 | 72 pool_unref(client->keywords.pool); |
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73 pool_unref(client->cmd_pool); |
0 | 74 i_free(client); |
75 | |
76 /* quit the program */ | |
77 my_client = NULL; | |
78 io_loop_stop(ioloop); | |
79 } | |
80 | |
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81 void client_disconnect(struct client *client) |
0 | 82 { |
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83 (void)o_stream_flush(client->output); |
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84 |
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85 i_stream_close(client->input); |
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86 o_stream_close(client->output); |
0 | 87 } |
88 | |
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89 void client_disconnect_with_error(struct client *client, const char *msg) |
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90 { |
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91 client_send_line(client, t_strconcat("* BYE ", msg, NULL)); |
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92 client_disconnect(client); |
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93 } |
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94 |
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95 int client_send_line(struct client *client, const char *data) |
0 | 96 { |
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97 struct const_iovec iov[2]; |
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98 |
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99 if (client->output->closed) |
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100 return -1; |
0 | 101 |
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102 iov[0].iov_base = data; |
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103 iov[0].iov_len = strlen(data); |
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104 iov[1].iov_base = "\r\n"; |
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105 iov[1].iov_len = 2; |
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106 |
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107 if (o_stream_sendv(client->output, iov, 2) < 0) |
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108 return -1; |
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109 |
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110 return o_stream_get_buffer_used_size(client->output) < |
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111 CLIENT_OUTPUT_OPTIMAL_SIZE; |
0 | 112 } |
113 | |
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114 void client_send_tagline(struct client *client, const char *data) |
0 | 115 { |
116 const char *tag = client->cmd_tag; | |
117 | |
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118 if (client->output->closed) |
0 | 119 return; |
120 | |
121 if (tag == NULL || *tag == '\0') | |
122 tag = "*"; | |
123 | |
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124 (void)o_stream_send_str(client->output, tag); |
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125 (void)o_stream_send(client->output, " ", 1); |
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126 (void)o_stream_send_str(client->output, data); |
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127 (void)o_stream_send(client->output, "\r\n", 2); |
0 | 128 } |
129 | |
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130 void client_send_command_error(struct client *client, const char *msg) |
0 | 131 { |
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132 const char *error, *cmd; |
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133 int fatal; |
0 | 134 |
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135 if (msg == NULL) { |
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136 msg = imap_parser_get_error(client->parser, &fatal); |
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137 if (fatal) { |
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138 client_disconnect_with_error(client, msg); |
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139 return; |
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140 } |
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141 } |
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142 |
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143 if (client->cmd_tag == NULL) |
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144 error = t_strconcat("BAD Error in IMAP tag: ", msg, NULL); |
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145 else if (client->cmd_name == NULL) |
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146 error = t_strconcat("BAD Error in IMAP command: ", msg, NULL); |
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147 else { |
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148 cmd = t_str_ucase(client->cmd_name); |
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149 error = t_strconcat("BAD Error in IMAP command ", |
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150 cmd, ": ", msg, NULL); |
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151 } |
0 | 152 |
153 client_send_tagline(client, error); | |
154 | |
155 if (++client->bad_counter >= CLIENT_MAX_BAD_COMMANDS) { | |
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156 client_disconnect_with_error(client, |
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157 "Too many invalid IMAP commands."); |
0 | 158 } |
159 } | |
160 | |
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161 int client_read_args(struct client *client, unsigned int count, |
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162 unsigned int flags, struct imap_arg **args) |
0 | 163 { |
164 int ret; | |
165 | |
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166 i_assert(count <= INT_MAX); |
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167 |
0 | 168 ret = imap_parser_read_args(client->parser, count, flags, args); |
720 | 169 if (ret >= (int)count) { |
0 | 170 /* all parameters read successfully */ |
171 return TRUE; | |
172 } else if (ret == -2) { | |
173 /* need more data */ | |
174 return FALSE; | |
175 } else { | |
176 /* error, or missing arguments */ | |
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177 client_send_command_error(client, ret < 0 ? NULL : |
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178 "Missing arguments"); |
0 | 179 return FALSE; |
180 } | |
181 } | |
182 | |
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183 int client_read_string_args(struct client *client, unsigned int count, ...) |
0 | 184 { |
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185 struct imap_arg *imap_args; |
0 | 186 va_list va; |
187 const char *str; | |
188 unsigned int i; | |
189 | |
190 if (!client_read_args(client, count, 0, &imap_args)) | |
191 return FALSE; | |
192 | |
193 va_start(va, count); | |
194 for (i = 0; i < count; i++) { | |
195 const char **ret = va_arg(va, const char **); | |
196 | |
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197 if (imap_args[i].type == IMAP_ARG_EOL) { |
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198 client_send_command_error(client, "Missing arguments."); |
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199 break; |
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200 } |
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201 |
0 | 202 str = imap_arg_string(&imap_args[i]); |
203 if (str == NULL) { | |
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204 client_send_command_error(client, "Invalid arguments."); |
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205 break; |
0 | 206 } |
207 | |
208 if (ret != NULL) | |
209 *ret = str; | |
210 } | |
211 va_end(va); | |
212 | |
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213 return i == count; |
0 | 214 } |
215 | |
1172 | 216 void _client_reset_command(struct client *client) |
0 | 217 { |
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218 /* reset input idle time because command output might have taken a |
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219 long time and we don't want to disconnect client immediately then */ |
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220 client->last_input = ioloop_time; |
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221 |
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222 client->command_pending = FALSE; |
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223 if (client->io == NULL) { |
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224 client->io = io_add(i_stream_get_fd(client->input), |
2460 | 225 IO_READ, _client_input, client); |
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226 } |
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227 |
0 | 228 client->cmd_tag = NULL; |
229 client->cmd_name = NULL; | |
230 client->cmd_func = NULL; | |
231 client->cmd_uid = FALSE; | |
232 | |
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233 p_clear(client->cmd_pool); |
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234 imap_parser_reset(client->parser); |
0 | 235 } |
236 | |
237 /* Skip incoming data until newline is found, | |
238 returns TRUE if newline was found. */ | |
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239 static int client_skip_line(struct client *client) |
0 | 240 { |
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241 const unsigned char *data; |
184 | 242 size_t i, data_size; |
0 | 243 |
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244 data = i_stream_get_data(client->input, &data_size); |
0 | 245 |
246 for (i = 0; i < data_size; i++) { | |
247 if (data[i] == '\n') { | |
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248 client->input_skip_line = FALSE; |
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249 i++; |
0 | 250 break; |
251 } | |
252 } | |
253 | |
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254 i_stream_skip(client->input, i); |
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255 return !client->input_skip_line; |
0 | 256 } |
257 | |
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258 static int client_handle_input(struct client *client) |
0 | 259 { |
260 if (client->cmd_func != NULL) { | |
261 /* command is being executed - continue it */ | |
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262 if (client->cmd_func(client)) { |
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263 /* command execution was finished */ |
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264 client->bad_counter = 0; |
1172 | 265 _client_reset_command(client); |
0 | 266 return TRUE; |
267 } | |
268 return FALSE; | |
269 } | |
270 | |
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271 if (client->input_skip_line) { |
0 | 272 /* we're just waiting for new line.. */ |
273 if (!client_skip_line(client)) | |
274 return FALSE; | |
275 | |
276 /* got the newline */ | |
1172 | 277 _client_reset_command(client); |
0 | 278 |
279 /* pass through to parse next command */ | |
280 } | |
281 | |
282 if (client->cmd_tag == NULL) { | |
283 client->cmd_tag = imap_parser_read_word(client->parser); | |
284 if (client->cmd_tag == NULL) | |
285 return FALSE; /* need more data */ | |
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286 client->cmd_tag = p_strdup(client->cmd_pool, client->cmd_tag); |
0 | 287 } |
288 | |
289 if (client->cmd_name == NULL) { | |
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290 client->cmd_name = imap_parser_read_word(client->parser); |
0 | 291 if (client->cmd_name == NULL) |
292 return FALSE; /* need more data */ | |
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293 client->cmd_name = p_strdup(client->cmd_pool, client->cmd_name); |
0 | 294 } |
295 | |
296 if (client->cmd_name == '\0') { | |
297 /* command not given - cmd_func is already NULL. */ | |
298 } else { | |
299 /* find the command function */ | |
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300 client->cmd_func = command_find(client->cmd_name); |
0 | 301 } |
302 | |
303 if (client->cmd_func == NULL) { | |
304 /* unknown command */ | |
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305 client_send_command_error(client, "Unknown command."); |
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306 client->input_skip_line = TRUE; |
1172 | 307 _client_reset_command(client); |
0 | 308 } else { |
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309 client->input_skip_line = TRUE; |
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310 if (client->cmd_func(client)) { |
0 | 311 /* command execution was finished */ |
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312 client->bad_counter = 0; |
1172 | 313 _client_reset_command(client); |
314 } else { | |
315 /* unfinished */ | |
316 return FALSE; | |
0 | 317 } |
318 } | |
319 | |
320 return TRUE; | |
321 } | |
322 | |
2460 | 323 void _client_input(void *context) |
0 | 324 { |
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325 struct client *client = context; |
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326 |
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327 if (client->command_pending) { |
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328 /* already processing one command. wait. */ |
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329 io_remove(client->io); |
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330 client->io = NULL; |
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331 } |
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332 |
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333 client->input_pending = FALSE; |
0 | 334 client->last_input = ioloop_time; |
335 | |
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336 switch (i_stream_read(client->input)) { |
0 | 337 case -1: |
338 /* disconnected */ | |
339 client_destroy(client); | |
340 return; | |
341 case -2: | |
342 /* parameter word is longer than max. input buffer size. | |
343 this is most likely an error, so skip the new data | |
344 until newline is found. */ | |
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345 client->input_skip_line = TRUE; |
0 | 346 |
347 client_send_command_error(client, "Too long argument."); | |
1172 | 348 _client_reset_command(client); |
0 | 349 break; |
350 } | |
351 | |
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352 o_stream_cork(client->output); |
0 | 353 while (client_handle_input(client)) |
354 ; | |
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355 o_stream_uncork(client->output); |
0 | 356 |
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357 if (client->command_pending) |
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358 client->input_pending = TRUE; |
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359 |
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360 if (client->output->closed) |
0 | 361 client_destroy(client); |
362 } | |
363 | |
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364 static void client_output(void *context) |
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365 { |
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366 struct client *client = context; |
2462 | 367 int ret, finished; |
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368 |
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369 if ((ret = o_stream_flush(client->output)) < 0) { |
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370 client_destroy(client); |
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371 return; |
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372 } |
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373 |
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374 client->last_output = ioloop_time; |
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375 |
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376 if (client->command_pending) { |
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377 o_stream_cork(client->output); |
2462 | 378 finished = client->cmd_func(client); |
379 o_stream_uncork(client->output); | |
380 | |
381 if (finished) { | |
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382 /* command execution was finished */ |
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383 client->bad_counter = 0; |
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384 _client_reset_command(client); |
2462 | 385 |
386 if (client->input_pending) | |
387 _client_input(client); | |
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388 } |
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389 } |
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390 } |
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391 |
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392 static void idle_timeout(void *context __attr_unused__) |
0 | 393 { |
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394 time_t idle_time; |
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395 |
0 | 396 if (my_client == NULL) |
397 return; | |
398 | |
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399 idle_time = ioloop_time - |
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400 I_MAX(my_client->last_input, my_client->last_output); |
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401 |
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402 if (my_client->command_pending && |
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We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
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403 o_stream_get_buffer_used_size(my_client->output) > 0 && |
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We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
404 idle_time >= CLIENT_OUTPUT_TIMEOUT) { |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
405 /* client isn't reading our output */ |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
406 client_destroy(my_client); |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
407 } else if (idle_time >= CLIENT_IDLE_TIMEOUT) { |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
408 /* client isn't sending us anything */ |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
409 if (!my_client->command_pending) { |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
410 client_send_line(my_client, |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
411 "* BYE Disconnected for inactivity."); |
d141e1bfdd63
We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents:
2058
diff
changeset
|
412 } |
0 | 413 client_destroy(my_client); |
414 } | |
415 } | |
416 | |
417 void clients_init(void) | |
418 { | |
419 my_client = NULL; | |
420 to_idle = timeout_add(10000, idle_timeout, NULL); | |
421 } | |
422 | |
423 void clients_deinit(void) | |
424 { | |
158
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Flush output buffer to client at exit, and send a nice "BYE Server shutting
Timo Sirainen <tss@iki.fi>
parents:
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425 if (my_client != NULL) { |
a1204e882bc7
Flush output buffer to client at exit, and send a nice "BYE Server shutting
Timo Sirainen <tss@iki.fi>
parents:
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426 client_send_line(my_client, "* BYE Server shutting down."); |
0 | 427 client_destroy(my_client); |
158
a1204e882bc7
Flush output buffer to client at exit, and send a nice "BYE Server shutting
Timo Sirainen <tss@iki.fi>
parents:
10
diff
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428 } |
0 | 429 |
430 timeout_remove(to_idle); | |
431 } |