Mercurial > hg > nginx
annotate src/mail/ngx_mail_smtp_handler.c @ 1477:59e1caf2be94
style fix and optimizations
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 13 Sep 2007 20:27:28 +0000 |
parents | 67578e966dcc |
children | 2647950e047f |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
1136 | 10 #include <ngx_mail.h> |
417
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11 |
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12 |
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13 static ngx_int_t ngx_mail_smtp_helo(ngx_mail_session_t *s, ngx_connection_t *c); |
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14 static ngx_int_t ngx_mail_smtp_auth(ngx_mail_session_t *s, ngx_connection_t *c); |
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15 static ngx_int_t ngx_mail_smtp_mail(ngx_mail_session_t *s, ngx_connection_t *c); |
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16 static ngx_int_t ngx_mail_smtp_starttls(ngx_mail_session_t *s, |
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17 ngx_connection_t *c); |
413
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18 |
527 | 19 |
1136 | 20 static u_char smtp_ok[] = "250 2.0.0 OK" CRLF; |
21 static u_char smtp_bye[] = "221 2.0.0 Bye" CRLF; | |
22 static u_char smtp_next[] = "334 " CRLF; | |
23 static u_char smtp_username[] = "334 VXNlcm5hbWU6" CRLF; | |
24 static u_char smtp_password[] = "334 UGFzc3dvcmQ6" CRLF; | |
25 static u_char smtp_invalid_command[] = "500 5.5.1 Invalid command" CRLF; | |
26 static u_char smtp_invalid_argument[] = "501 5.5.4 Invalid argument" CRLF; | |
27 static u_char smtp_auth_required[] = "530 5.7.1 Authentication required" CRLF; | |
28 | |
521 | 29 |
30 void | |
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31 ngx_mail_smtp_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
413
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32 { |
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33 ngx_mail_core_srv_conf_t *cscf; |
641 | 34 |
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35 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
541 | 36 |
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37 if (cscf->smtp_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) { |
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38 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
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39 ngx_mail_session_internal_server_error(s); |
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40 return; |
641 | 41 } |
42 } | |
43 | |
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44 c->read->handler = ngx_mail_smtp_init_protocol; |
583 | 45 |
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46 s->out = cscf->smtp_greeting; |
539 | 47 |
1136 | 48 ngx_mail_send(c->write); |
539 | 49 } |
50 | |
51 | |
52 void | |
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53 ngx_mail_smtp_init_protocol(ngx_event_t *rev) |
539 | 54 { |
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55 ngx_connection_t *c; |
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56 ngx_mail_session_t *s; |
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57 |
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58 c = rev->data; |
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59 |
541 | 60 c->log->action = "in auth state"; |
61 | |
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62 if (rev->timedout) { |
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63 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 64 c->timedout = 1; |
1136 | 65 ngx_mail_close_connection(c); |
423
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66 return; |
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67 } |
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68 |
539 | 69 s = c->data; |
521 | 70 |
419
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71 if (s->buffer == NULL) { |
583 | 72 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) |
73 == NGX_ERROR) | |
74 { | |
1136 | 75 ngx_mail_session_internal_server_error(s); |
583 | 76 return; |
77 } | |
78 | |
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79 s->buffer = ngx_create_temp_buf(c->pool, 512); |
583 | 80 if (s->buffer == NULL) { |
1136 | 81 ngx_mail_session_internal_server_error(s); |
583 | 82 return; |
83 } | |
419
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84 } |
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85 |
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86 s->mail_state = ngx_smtp_start; |
1477 | 87 c->read->handler = ngx_mail_smtp_auth_state; |
1136 | 88 |
1477 | 89 ngx_mail_smtp_auth_state(rev); |
521 | 90 } |
91 | |
92 | |
527 | 93 void |
1477 | 94 ngx_mail_smtp_auth_state(ngx_event_t *rev) |
420
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95 { |
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96 ngx_int_t rc; |
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97 ngx_connection_t *c; |
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98 ngx_mail_session_t *s; |
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99 |
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100 c = rev->data; |
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101 s = c->data; |
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102 |
1136 | 103 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp auth state"); |
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104 |
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105 if (rev->timedout) { |
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106 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
577 | 107 c->timedout = 1; |
1136 | 108 ngx_mail_close_connection(c); |
423
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109 return; |
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110 } |
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111 |
539 | 112 if (s->out.len) { |
1136 | 113 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp send handler busy"); |
539 | 114 s->blocked = 1; |
115 return; | |
116 } | |
117 | |
118 s->blocked = 0; | |
119 | |
1136 | 120 rc = ngx_mail_read_command(s); |
420
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121 |
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122 if (rc == NGX_AGAIN || rc == NGX_ERROR) { |
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123 return; |
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124 } |
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125 |
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126 s->out.len = sizeof(smtp_ok) - 1; |
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127 s->out.data = smtp_ok; |
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128 |
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129 if (rc == NGX_OK) { |
1136 | 130 switch (s->mail_state) { |
421
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131 |
1136 | 132 case ngx_smtp_start: |
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133 |
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134 switch (s->command) { |
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135 |
1136 | 136 case NGX_SMTP_HELO: |
137 case NGX_SMTP_EHLO: | |
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138 rc = ngx_mail_smtp_helo(s, c); |
809 | 139 break; |
140 | |
1136 | 141 case NGX_SMTP_AUTH: |
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142 rc = ngx_mail_smtp_auth(s, c); |
800 | 143 break; |
144 | |
1136 | 145 case NGX_SMTP_QUIT: |
539 | 146 s->quit = 1; |
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147 s->out.len = sizeof(smtp_bye) - 1; |
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148 s->out.data = smtp_bye; |
527 | 149 break; |
150 | |
1136 | 151 case NGX_SMTP_MAIL: |
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152 rc = ngx_mail_smtp_mail(s, c); |
583 | 153 break; |
154 | |
1136 | 155 case NGX_SMTP_NOOP: |
156 case NGX_SMTP_RSET: | |
421
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157 break; |
1322 | 158 |
159 case NGX_SMTP_STARTTLS: | |
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160 rc = ngx_mail_smtp_starttls(s, c); |
1322 | 161 break; |
162 | |
163 default: | |
164 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
165 break; | |
421
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166 } |
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167 |
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168 break; |
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169 |
1136 | 170 case ngx_smtp_auth_login_username: |
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171 rc = ngx_mail_auth_login_username(s, c); |
809 | 172 |
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173 s->out.len = sizeof(smtp_password) - 1; |
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174 s->out.data = smtp_password; |
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175 s->mail_state = ngx_smtp_auth_login_password; |
809 | 176 break; |
177 | |
1136 | 178 case ngx_smtp_auth_login_password: |
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179 rc = ngx_mail_auth_login_password(s, c); |
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180 break; |
809 | 181 |
1136 | 182 case ngx_smtp_auth_plain: |
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183 rc = ngx_mail_auth_plain(s, c, 0); |
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184 break; |
809 | 185 |
1136 | 186 case ngx_smtp_auth_cram_md5: |
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187 rc = ngx_mail_auth_cram_md5(s, c); |
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188 break; |
421
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189 } |
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190 } |
420
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191 |
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192 switch (rc) { |
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193 |
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194 case NGX_DONE: |
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195 ngx_mail_auth(s); |
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196 return; |
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197 |
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198 case NGX_ERROR: |
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199 ngx_mail_session_internal_server_error(s); |
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200 return; |
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201 |
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202 case NGX_MAIL_PARSE_INVALID_COMMAND: |
1136 | 203 s->mail_state = ngx_smtp_start; |
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204 s->state = 0; |
420
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205 |
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206 s->out.len = sizeof(smtp_invalid_command) - 1; |
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207 s->out.data = smtp_invalid_command; |
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208 |
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209 /* fall through */ |
539 | 210 |
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211 case NGX_OK: |
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212 s->args.nelts = 0; |
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213 s->buffer->pos = s->buffer->start; |
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214 s->buffer->last = s->buffer->start; |
810 | 215 |
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216 if (s->state) { |
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217 s->arg_start = s->buffer->start; |
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218 } |
539 | 219 |
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220 ngx_mail_send(c->write); |
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221 } |
417
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222 } |
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223 |
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224 |
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225 static ngx_int_t |
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226 ngx_mail_smtp_helo(ngx_mail_session_t *s, ngx_connection_t *c) |
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227 { |
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228 ngx_str_t *arg; |
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229 ngx_mail_core_srv_conf_t *cscf; |
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230 #if (NGX_MAIL_SSL) |
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231 ngx_mail_ssl_conf_t *sslcf; |
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232 #endif |
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233 |
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234 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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235 |
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236 if (s->args.nelts != 1) { |
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237 s->out.len = sizeof(smtp_invalid_argument) - 1; |
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238 s->out.data = smtp_invalid_argument; |
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239 s->state = 0; |
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240 return NGX_OK; |
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241 } |
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242 |
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243 arg = s->args.elts; |
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244 |
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245 s->smtp_helo.len = arg[0].len; |
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246 |
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247 s->smtp_helo.data = ngx_palloc(c->pool, arg[0].len); |
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248 if (s->smtp_helo.data == NULL) { |
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249 return NGX_ERROR; |
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250 } |
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251 |
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252 ngx_memcpy(s->smtp_helo.data, arg[0].data, arg[0].len); |
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253 |
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254 if (s->command == NGX_SMTP_HELO) { |
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255 s->out = cscf->smtp_server_name; |
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256 |
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257 } else { |
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258 s->esmtp = 1; |
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259 |
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260 #if (NGX_MAIL_SSL) |
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261 |
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262 if (c->ssl == NULL) { |
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263 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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264 |
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265 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
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266 s->out = cscf->smtp_starttls_capability; |
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267 return NGX_OK; |
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268 } |
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269 |
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270 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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271 s->out = cscf->smtp_starttls_only_capability; |
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272 return NGX_OK; |
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273 } |
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274 } |
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275 #endif |
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276 |
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277 s->out = cscf->smtp_capability; |
420
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278 } |
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279 |
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280 return NGX_OK; |
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281 } |
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282 |
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283 |
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284 static ngx_int_t |
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285 ngx_mail_smtp_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
525 | 286 { |
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287 u_char *p; |
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288 ngx_str_t *arg, salt; |
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289 ngx_uint_t n; |
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290 ngx_mail_core_srv_conf_t *cscf; |
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291 #if (NGX_MAIL_SSL) |
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292 ngx_mail_ssl_conf_t *sslcf; |
525 | 293 |
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294 if (c->ssl == NULL) { |
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295 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
479 | 296 |
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297 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
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298 return NGX_MAIL_PARSE_INVALID_COMMAND; |
539 | 299 } |
300 } | |
301 | |
302 #endif | |
303 | |
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304 if (s->args.nelts == 0) { |
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305 s->out.len = sizeof(smtp_invalid_argument) - 1; |
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306 s->out.data = smtp_invalid_argument; |
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307 s->state = 0; |
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308 return NGX_OK; |
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309 } |
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310 |
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311 if (s->args.nelts != 1) { |
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312 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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313 } |
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314 |
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315 arg = s->args.elts; |
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316 |
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317 if (arg[0].len == 5) { |
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318 |
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319 if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) == 0) { |
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320 |
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321 if (s->args.nelts != 1) { |
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322 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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323 } |
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324 |
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325 s->out.len = sizeof(smtp_username) - 1; |
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326 s->out.data = smtp_username; |
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327 s->mail_state = ngx_smtp_auth_login_username; |
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328 |
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329 return NGX_OK; |
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330 |
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331 } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", 5) == 0) { |
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332 |
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333 s->out.len = sizeof(smtp_next) - 1; |
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334 s->out.data = smtp_next; |
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335 s->mail_state = ngx_smtp_auth_plain; |
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336 |
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337 return NGX_OK; |
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338 } |
543 | 339 |
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340 } else if (arg[0].len == 8 |
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341 && ngx_strncasecmp(arg[0].data, (u_char *) "CRAM-MD5", 8) == 0) |
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342 { |
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343 if (s->args.nelts != 1) { |
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344 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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345 } |
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346 |
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347 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
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348 |
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349 if (!(cscf->smtp_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
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350 return NGX_MAIL_PARSE_INVALID_COMMAND; |
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351 } |
479 | 352 |
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353 p = ngx_palloc(c->pool, |
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354 sizeof("334 " CRLF) - 1 |
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355 + ngx_base64_encoded_length(s->salt.len)); |
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356 if (p == NULL) { |
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357 return NGX_ERROR; |
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358 } |
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359 |
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360 p[0] = '3'; p[1]= '3'; p[2] = '4'; p[3]= ' '; |
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361 salt.data = &p[4]; |
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362 s->salt.len -= 2; |
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363 |
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364 ngx_encode_base64(&salt, &s->salt); |
479 | 365 |
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366 s->salt.len += 2; |
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367 n = 4 + salt.len; |
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368 p[n++] = CR; p[n++] = LF; |
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369 |
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370 s->out.len = n; |
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371 s->out.data = p; |
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372 s->mail_state = ngx_smtp_auth_cram_md5; |
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373 |
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374 return NGX_OK; |
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375 } |
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376 |
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377 return NGX_MAIL_PARSE_INVALID_COMMAND; |
417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
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378 } |
539 | 379 |
380 | |
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381 static ngx_int_t |
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382 ngx_mail_smtp_mail(ngx_mail_session_t *s, ngx_connection_t *c) |
541 | 383 { |
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384 u_char ch; |
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385 ngx_str_t mail; |
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386 ngx_uint_t i; |
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387 |
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388 if (c->log->log_level >= NGX_LOG_INFO) { |
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389 mail.len = s->buffer->last - s->buffer->start; |
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390 mail.data = s->buffer->start; |
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391 |
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392 for (i = 0; i < mail.len; i++) { |
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393 ch = mail.data[i]; |
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394 |
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395 if (ch != CR && ch != LF) { |
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396 continue; |
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397 } |
541 | 398 |
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399 mail.data[i] = ' '; |
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400 } |
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401 |
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402 while (i) { |
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403 if (mail.data[i - 1] != ' ') { |
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404 break; |
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405 } |
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406 |
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407 i--; |
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408 } |
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409 |
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410 mail.len = i; |
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411 |
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412 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, |
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413 "client was rejected: \"%V\"", &mail); |
541 | 414 } |
577 | 415 |
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416 s->out.len = sizeof(smtp_auth_required) - 1; |
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417 s->out.data = smtp_auth_required; |
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418 |
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419 return NGX_OK; |
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420 } |
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421 |
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422 |
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423 static ngx_int_t |
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424 ngx_mail_smtp_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
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425 { |
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426 #if (NGX_MAIL_SSL) |
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427 ngx_mail_ssl_conf_t *sslcf; |
541 | 428 |
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429 if (c->ssl == NULL) { |
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430 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
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431 if (sslcf->starttls) { |
541 | 432 |
1476
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433 /* |
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434 * RFC3207 requires us to discard any knowledge |
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435 * obtained from client before STARTTLS. |
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436 */ |
541 | 437 |
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438 s->smtp_helo.len = 0; |
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parents:
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439 s->smtp_helo.data = NULL; |
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parents:
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440 |
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parents:
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441 c->read->handler = ngx_mail_starttls_handler; |
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442 return NGX_OK; |
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parents:
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443 } |
541 | 444 } |
445 | |
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parents:
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446 #endif |
541 | 447 |
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parents:
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448 return NGX_MAIL_PARSE_INVALID_COMMAND; |
541 | 449 } |