Mercurial > hg > nginx
annotate src/mail/ngx_mail_smtp_module.c @ 7660:d33e17499088
Version bump.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Tue, 26 May 2020 22:03:00 +0300 |
| parents | f18c285c2e59 |
| children | dc955d274130 |
| rev | line source |
|---|---|
| 521 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 521 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_event.h> | |
| 1136 | 11 #include <ngx_mail.h> |
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12 #include <ngx_mail_smtp_module.h> |
| 521 | 13 |
| 14 | |
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15 static void *ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf); |
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16 static char *ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, |
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17 void *child); |
| 527 | 18 |
| 19 | |
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20 static ngx_conf_bitmask_t ngx_mail_smtp_auth_methods[] = { |
| 1323 | 21 { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, |
| 22 { ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED }, | |
| 23 { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, | |
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24 { ngx_string("external"), NGX_MAIL_AUTH_EXTERNAL_ENABLED }, |
| 2309 | 25 { ngx_string("none"), NGX_MAIL_AUTH_NONE_ENABLED }, |
| 1323 | 26 { ngx_null_string, 0 } |
| 27 }; | |
| 28 | |
| 29 | |
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30 static ngx_str_t ngx_mail_smtp_auth_methods_names[] = { |
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31 ngx_string("PLAIN"), |
| 1136 | 32 ngx_string("LOGIN"), |
| 33 ngx_null_string, /* APOP */ | |
| 2309 | 34 ngx_string("CRAM-MD5"), |
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35 ngx_string("EXTERNAL"), |
| 2309 | 36 ngx_null_string /* NONE */ |
| 1136 | 37 }; |
| 38 | |
| 39 | |
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40 static ngx_mail_protocol_t ngx_mail_smtp_protocol = { |
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41 ngx_string("smtp"), |
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42 { 25, 465, 587, 0 }, |
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43 NGX_MAIL_SMTP_PROTOCOL, |
| 809 | 44 |
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45 ngx_mail_smtp_init_session, |
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46 ngx_mail_smtp_init_protocol, |
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47 ngx_mail_smtp_parse_command, |
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48 ngx_mail_smtp_auth_state, |
| 809 | 49 |
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50 ngx_string("451 4.3.2 Internal server error" CRLF), |
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51 ngx_string("421 4.7.1 SSL certificate error" CRLF), |
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52 ngx_string("421 4.7.1 No required SSL certificate" CRLF) |
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53 }; |
| 809 | 54 |
| 55 | |
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56 static ngx_command_t ngx_mail_smtp_commands[] = { |
| 521 | 57 |
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58 { ngx_string("smtp_client_buffer"), |
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59 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
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60 ngx_conf_set_size_slot, |
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61 NGX_MAIL_SRV_CONF_OFFSET, |
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62 offsetof(ngx_mail_smtp_srv_conf_t, client_buffer_size), |
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63 NULL }, |
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64 |
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65 { ngx_string("smtp_greeting_delay"), |
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66 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
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67 ngx_conf_set_msec_slot, |
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68 NGX_MAIL_SRV_CONF_OFFSET, |
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69 offsetof(ngx_mail_smtp_srv_conf_t, greeting_delay), |
| 1136 | 70 NULL }, |
| 71 | |
| 72 { ngx_string("smtp_capabilities"), | |
| 73 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
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74 ngx_mail_capabilities, |
| 1136 | 75 NGX_MAIL_SRV_CONF_OFFSET, |
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76 offsetof(ngx_mail_smtp_srv_conf_t, capabilities), |
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77 NULL }, |
| 1323 | 78 |
| 1136 | 79 { ngx_string("smtp_auth"), |
| 80 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
| 81 ngx_conf_set_bitmask_slot, | |
| 82 NGX_MAIL_SRV_CONF_OFFSET, | |
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83 offsetof(ngx_mail_smtp_srv_conf_t, auth_methods), |
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84 &ngx_mail_smtp_auth_methods }, |
| 800 | 85 |
| 521 | 86 ngx_null_command |
| 87 }; | |
| 88 | |
| 89 | |
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90 static ngx_mail_module_t ngx_mail_smtp_module_ctx = { |
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91 &ngx_mail_smtp_protocol, /* protocol */ |
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92 |
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93 NULL, /* create main configuration */ |
| 521 | 94 NULL, /* init main configuration */ |
| 95 | |
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96 ngx_mail_smtp_create_srv_conf, /* create server configuration */ |
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97 ngx_mail_smtp_merge_srv_conf /* merge server configuration */ |
| 521 | 98 }; |
| 99 | |
| 100 | |
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101 ngx_module_t ngx_mail_smtp_module = { |
| 521 | 102 NGX_MODULE_V1, |
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103 &ngx_mail_smtp_module_ctx, /* module context */ |
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104 ngx_mail_smtp_commands, /* module directives */ |
| 1136 | 105 NGX_MAIL_MODULE, /* module type */ |
| 541 | 106 NULL, /* init master */ |
| 521 | 107 NULL, /* init module */ |
| 541 | 108 NULL, /* init process */ |
| 109 NULL, /* init thread */ | |
| 110 NULL, /* exit thread */ | |
| 111 NULL, /* exit process */ | |
| 112 NULL, /* exit master */ | |
| 113 NGX_MODULE_V1_PADDING | |
| 521 | 114 }; |
| 115 | |
| 116 | |
| 117 static void * | |
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118 ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf) |
| 577 | 119 { |
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120 ngx_mail_smtp_srv_conf_t *sscf; |
| 641 | 121 |
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122 sscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_smtp_srv_conf_t)); |
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123 if (sscf == NULL) { |
| 527 | 124 return NULL; |
| 521 | 125 } |
| 126 | |
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127 sscf->client_buffer_size = NGX_CONF_UNSET_SIZE; |
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128 sscf->greeting_delay = NGX_CONF_UNSET_MSEC; |
| 521 | 129 |
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130 if (ngx_array_init(&sscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
| 1136 | 131 != NGX_OK) |
| 132 { | |
| 133 return NULL; | |
| 134 } | |
| 135 | |
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136 return sscf; |
| 521 | 137 } |
| 138 | |
| 139 | |
| 140 static char * | |
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141 ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
| 521 | 142 { |
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143 ngx_mail_smtp_srv_conf_t *prev = parent; |
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144 ngx_mail_smtp_srv_conf_t *conf = child; |
| 521 | 145 |
| 2309 | 146 u_char *p, *auth, *last; |
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147 size_t size; |
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148 ngx_str_t *c; |
| 2309 | 149 ngx_uint_t i, m, auth_enabled; |
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150 ngx_mail_core_srv_conf_t *cscf; |
| 527 | 151 |
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152 ngx_conf_merge_size_value(conf->client_buffer_size, |
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153 prev->client_buffer_size, |
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154 (size_t) ngx_pagesize); |
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155 |
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156 ngx_conf_merge_msec_value(conf->greeting_delay, |
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157 prev->greeting_delay, 0); |
| 521 | 158 |
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159 ngx_conf_merge_bitmask_value(conf->auth_methods, |
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160 prev->auth_methods, |
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161 (NGX_CONF_BITMASK_SET |
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162 |NGX_MAIL_AUTH_PLAIN_ENABLED |
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163 |NGX_MAIL_AUTH_LOGIN_ENABLED)); |
| 800 | 164 |
| 165 | |
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166 cscf = ngx_mail_conf_get_module_srv_conf(cf, ngx_mail_core_module); |
| 527 | 167 |
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168 size = sizeof("220 ESMTP ready" CRLF) - 1 + cscf->server_name.len; |
| 809 | 169 |
| 2049 | 170 p = ngx_pnalloc(cf->pool, size); |
| 583 | 171 if (p == NULL) { |
| 527 | 172 return NGX_CONF_ERROR; |
| 173 } | |
| 174 | |
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175 conf->greeting.len = size; |
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176 conf->greeting.data = p; |
| 527 | 177 |
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178 *p++ = '2'; *p++ = '2'; *p++ = '0'; *p++ = ' '; |
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179 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
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180 ngx_memcpy(p, " ESMTP ready" CRLF, sizeof(" ESMTP ready" CRLF) - 1); |
| 583 | 181 |
| 182 | |
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183 size = sizeof("250 " CRLF) - 1 + cscf->server_name.len; |
| 527 | 184 |
| 2049 | 185 p = ngx_pnalloc(cf->pool, size); |
| 583 | 186 if (p == NULL) { |
| 187 return NGX_CONF_ERROR; | |
| 188 } | |
| 189 | |
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190 conf->server_name.len = size; |
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191 conf->server_name.data = p; |
| 583 | 192 |
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193 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' '; |
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194 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
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195 *p++ = CR; *p = LF; |
| 527 | 196 |
| 197 | |
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198 if (conf->capabilities.nelts == 0) { |
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199 conf->capabilities = prev->capabilities; |
| 1136 | 200 } |
| 201 | |
| 2309 | 202 size = sizeof("250-") - 1 + cscf->server_name.len + sizeof(CRLF) - 1; |
| 1136 | 203 |
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204 c = conf->capabilities.elts; |
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205 for (i = 0; i < conf->capabilities.nelts; i++) { |
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206 size += sizeof("250 ") - 1 + c[i].len + sizeof(CRLF) - 1; |
| 527 | 207 } |
| 208 | |
| 2309 | 209 auth_enabled = 0; |
| 210 | |
| 1323 | 211 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
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212 m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| 1323 | 213 m <<= 1, i++) |
| 214 { | |
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215 if (m & conf->auth_methods) { |
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216 size += 1 + ngx_mail_smtp_auth_methods_names[i].len; |
| 2309 | 217 auth_enabled = 1; |
| 1323 | 218 } |
| 219 } | |
| 220 | |
| 2309 | 221 if (auth_enabled) { |
| 222 size += sizeof("250 AUTH") - 1 + sizeof(CRLF) - 1; | |
| 223 } | |
| 224 | |
| 2049 | 225 p = ngx_pnalloc(cf->pool, size); |
| 583 | 226 if (p == NULL) { |
| 227 return NGX_CONF_ERROR; | |
| 228 } | |
| 229 | |
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230 conf->capability.len = size; |
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231 conf->capability.data = p; |
| 1136 | 232 |
| 2309 | 233 last = p; |
| 234 | |
| 1136 | 235 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-'; |
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236 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
| 1136 | 237 *p++ = CR; *p++ = LF; |
| 238 | |
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239 for (i = 0; i < conf->capabilities.nelts; i++) { |
| 2309 | 240 last = p; |
| 1136 | 241 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-'; |
| 242 p = ngx_cpymem(p, c[i].data, c[i].len); | |
| 243 *p++ = CR; *p++ = LF; | |
| 244 } | |
| 245 | |
| 1322 | 246 auth = p; |
| 247 | |
| 2309 | 248 if (auth_enabled) { |
| 249 last = p; | |
| 250 | |
| 251 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' '; | |
| 252 *p++ = 'A'; *p++ = 'U'; *p++ = 'T'; *p++ = 'H'; | |
| 1136 | 253 |
| 2309 | 254 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
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255 m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| 2309 | 256 m <<= 1, i++) |
| 257 { | |
| 258 if (m & conf->auth_methods) { | |
| 259 *p++ = ' '; | |
| 260 p = ngx_cpymem(p, ngx_mail_smtp_auth_methods_names[i].data, | |
| 261 ngx_mail_smtp_auth_methods_names[i].len); | |
| 262 } | |
| 1136 | 263 } |
| 2309 | 264 |
| 265 *p++ = CR; *p = LF; | |
| 1136 | 266 |
| 2309 | 267 } else { |
| 268 last[3] = ' '; | |
| 269 } | |
| 1136 | 270 |
| 1322 | 271 size += sizeof("250 STARTTLS" CRLF) - 1; |
| 272 | |
| 2049 | 273 p = ngx_pnalloc(cf->pool, size); |
| 1322 | 274 if (p == NULL) { |
| 275 return NGX_CONF_ERROR; | |
| 276 } | |
| 277 | |
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278 conf->starttls_capability.len = size; |
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279 conf->starttls_capability.data = p; |
| 1322 | 280 |
| 2309 | 281 p = ngx_cpymem(p, conf->capability.data, conf->capability.len); |
| 1322 | 282 |
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283 ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1); |
| 1322 | 284 |
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285 p = conf->starttls_capability.data |
| 2309 | 286 + (last - conf->capability.data) + 3; |
| 1322 | 287 *p = '-'; |
| 288 | |
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289 size = (auth - conf->capability.data) |
| 1322 | 290 + sizeof("250 STARTTLS" CRLF) - 1; |
| 291 | |
| 2049 | 292 p = ngx_pnalloc(cf->pool, size); |
| 1322 | 293 if (p == NULL) { |
| 294 return NGX_CONF_ERROR; | |
| 295 } | |
| 296 | |
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297 conf->starttls_only_capability.len = size; |
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298 conf->starttls_only_capability.data = p; |
| 1322 | 299 |
| 2309 | 300 p = ngx_cpymem(p, conf->capability.data, auth - conf->capability.data); |
| 1322 | 301 |
| 302 ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1); | |
| 303 | |
| 2309 | 304 if (last < auth) { |
| 305 p = conf->starttls_only_capability.data | |
| 306 + (last - conf->capability.data) + 3; | |
| 307 *p = '-'; | |
| 308 } | |
| 309 | |
| 521 | 310 return NGX_CONF_OK; |
| 311 } |