Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_smtp_module.c @ 6422:768e287a6f36
Fixed sendfile in threads (or with aio preload) and subrequests.
If sendfile in threads is used, it is possible that multiple
subrequests will trigger multiple ngx_linux_sendfile_thread() calls,
as operations are only serialized in output chain based on r->aio,
that is, on subrequest level.
This resulted in "task #N already active" alerts, in particular, when
running proxy_store.t with "aio threads; sendfile on;".
Fix is to tolerate duplicate calls, with an additional safety check
that the file is the same as previously used.
The same problem also affects "aio on; sendfile on;" on FreeBSD
(previously known as "aio sendfile;"), where aio->preload_handler()
could be called multiple times due to similar reasons, resulting in
"second aio post" alerts. Fix is the same as well.
It is also believed that similar problems can arise if a filter
calls the next body filter multiple times for some reason. These are
mostly theoretical though.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 03 Mar 2016 21:14:12 +0300 |
parents | ec01b1d1fff1 |
children | bcb107bb89cd |
rev | line source |
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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 }, | |
2309 | 24 { ngx_string("none"), NGX_MAIL_AUTH_NONE_ENABLED }, |
1323 | 25 { ngx_null_string, 0 } |
26 }; | |
27 | |
28 | |
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29 static ngx_str_t ngx_mail_smtp_auth_methods_names[] = { |
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30 ngx_string("PLAIN"), |
1136 | 31 ngx_string("LOGIN"), |
32 ngx_null_string, /* APOP */ | |
2309 | 33 ngx_string("CRAM-MD5"), |
34 ngx_null_string /* NONE */ | |
1136 | 35 }; |
36 | |
37 | |
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38 static ngx_mail_protocol_t ngx_mail_smtp_protocol = { |
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39 ngx_string("smtp"), |
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40 { 25, 465, 587, 0 }, |
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41 NGX_MAIL_SMTP_PROTOCOL, |
809 | 42 |
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43 ngx_mail_smtp_init_session, |
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44 ngx_mail_smtp_init_protocol, |
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45 ngx_mail_smtp_parse_command, |
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46 ngx_mail_smtp_auth_state, |
809 | 47 |
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48 ngx_string("451 4.3.2 Internal server error" CRLF), |
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49 ngx_string("421 4.7.1 SSL certificate error" CRLF), |
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50 ngx_string("421 4.7.1 No required SSL certificate" CRLF) |
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51 }; |
809 | 52 |
53 | |
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54 static ngx_command_t ngx_mail_smtp_commands[] = { |
521 | 55 |
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56 { ngx_string("smtp_client_buffer"), |
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57 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
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58 ngx_conf_set_size_slot, |
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59 NGX_MAIL_SRV_CONF_OFFSET, |
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60 offsetof(ngx_mail_smtp_srv_conf_t, client_buffer_size), |
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61 NULL }, |
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62 |
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63 { ngx_string("smtp_greeting_delay"), |
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64 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
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65 ngx_conf_set_msec_slot, |
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66 NGX_MAIL_SRV_CONF_OFFSET, |
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67 offsetof(ngx_mail_smtp_srv_conf_t, greeting_delay), |
1136 | 68 NULL }, |
69 | |
70 { ngx_string("smtp_capabilities"), | |
71 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
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72 ngx_mail_capabilities, |
1136 | 73 NGX_MAIL_SRV_CONF_OFFSET, |
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74 offsetof(ngx_mail_smtp_srv_conf_t, capabilities), |
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75 NULL }, |
1323 | 76 |
1136 | 77 { ngx_string("smtp_auth"), |
78 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
79 ngx_conf_set_bitmask_slot, | |
80 NGX_MAIL_SRV_CONF_OFFSET, | |
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81 offsetof(ngx_mail_smtp_srv_conf_t, auth_methods), |
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82 &ngx_mail_smtp_auth_methods }, |
800 | 83 |
521 | 84 ngx_null_command |
85 }; | |
86 | |
87 | |
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88 static ngx_mail_module_t ngx_mail_smtp_module_ctx = { |
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89 &ngx_mail_smtp_protocol, /* protocol */ |
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90 |
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91 NULL, /* create main configuration */ |
521 | 92 NULL, /* init main configuration */ |
93 | |
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94 ngx_mail_smtp_create_srv_conf, /* create server configuration */ |
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95 ngx_mail_smtp_merge_srv_conf /* merge server configuration */ |
521 | 96 }; |
97 | |
98 | |
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99 ngx_module_t ngx_mail_smtp_module = { |
521 | 100 NGX_MODULE_V1, |
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101 &ngx_mail_smtp_module_ctx, /* module context */ |
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102 ngx_mail_smtp_commands, /* module directives */ |
1136 | 103 NGX_MAIL_MODULE, /* module type */ |
541 | 104 NULL, /* init master */ |
521 | 105 NULL, /* init module */ |
541 | 106 NULL, /* init process */ |
107 NULL, /* init thread */ | |
108 NULL, /* exit thread */ | |
109 NULL, /* exit process */ | |
110 NULL, /* exit master */ | |
111 NGX_MODULE_V1_PADDING | |
521 | 112 }; |
113 | |
114 | |
115 static void * | |
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116 ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf) |
577 | 117 { |
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118 ngx_mail_smtp_srv_conf_t *sscf; |
641 | 119 |
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120 sscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_smtp_srv_conf_t)); |
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121 if (sscf == NULL) { |
527 | 122 return NULL; |
521 | 123 } |
124 | |
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125 sscf->client_buffer_size = NGX_CONF_UNSET_SIZE; |
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126 sscf->greeting_delay = NGX_CONF_UNSET_MSEC; |
521 | 127 |
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128 if (ngx_array_init(&sscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
1136 | 129 != NGX_OK) |
130 { | |
131 return NULL; | |
132 } | |
133 | |
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134 return sscf; |
521 | 135 } |
136 | |
137 | |
138 static char * | |
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139 ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
521 | 140 { |
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141 ngx_mail_smtp_srv_conf_t *prev = parent; |
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142 ngx_mail_smtp_srv_conf_t *conf = child; |
521 | 143 |
2309 | 144 u_char *p, *auth, *last; |
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145 size_t size; |
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146 ngx_str_t *c; |
2309 | 147 ngx_uint_t i, m, auth_enabled; |
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148 ngx_mail_core_srv_conf_t *cscf; |
527 | 149 |
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150 ngx_conf_merge_size_value(conf->client_buffer_size, |
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151 prev->client_buffer_size, |
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152 (size_t) ngx_pagesize); |
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153 |
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154 ngx_conf_merge_msec_value(conf->greeting_delay, |
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155 prev->greeting_delay, 0); |
521 | 156 |
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157 ngx_conf_merge_bitmask_value(conf->auth_methods, |
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158 prev->auth_methods, |
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159 (NGX_CONF_BITMASK_SET |
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160 |NGX_MAIL_AUTH_PLAIN_ENABLED |
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161 |NGX_MAIL_AUTH_LOGIN_ENABLED)); |
800 | 162 |
163 | |
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164 cscf = ngx_mail_conf_get_module_srv_conf(cf, ngx_mail_core_module); |
527 | 165 |
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166 size = sizeof("220 ESMTP ready" CRLF) - 1 + cscf->server_name.len; |
809 | 167 |
2049 | 168 p = ngx_pnalloc(cf->pool, size); |
583 | 169 if (p == NULL) { |
527 | 170 return NGX_CONF_ERROR; |
171 } | |
172 | |
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173 conf->greeting.len = size; |
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174 conf->greeting.data = p; |
527 | 175 |
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176 *p++ = '2'; *p++ = '2'; *p++ = '0'; *p++ = ' '; |
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177 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
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178 ngx_memcpy(p, " ESMTP ready" CRLF, sizeof(" ESMTP ready" CRLF) - 1); |
583 | 179 |
180 | |
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181 size = sizeof("250 " CRLF) - 1 + cscf->server_name.len; |
527 | 182 |
2049 | 183 p = ngx_pnalloc(cf->pool, size); |
583 | 184 if (p == NULL) { |
185 return NGX_CONF_ERROR; | |
186 } | |
187 | |
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188 conf->server_name.len = size; |
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189 conf->server_name.data = p; |
583 | 190 |
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191 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' '; |
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192 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
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193 *p++ = CR; *p = LF; |
527 | 194 |
195 | |
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196 if (conf->capabilities.nelts == 0) { |
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197 conf->capabilities = prev->capabilities; |
1136 | 198 } |
199 | |
2309 | 200 size = sizeof("250-") - 1 + cscf->server_name.len + sizeof(CRLF) - 1; |
1136 | 201 |
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202 c = conf->capabilities.elts; |
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203 for (i = 0; i < conf->capabilities.nelts; i++) { |
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204 size += sizeof("250 ") - 1 + c[i].len + sizeof(CRLF) - 1; |
527 | 205 } |
206 | |
2309 | 207 auth_enabled = 0; |
208 | |
1323 | 209 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
210 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED; | |
211 m <<= 1, i++) | |
212 { | |
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213 if (m & conf->auth_methods) { |
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214 size += 1 + ngx_mail_smtp_auth_methods_names[i].len; |
2309 | 215 auth_enabled = 1; |
1323 | 216 } |
217 } | |
218 | |
2309 | 219 if (auth_enabled) { |
220 size += sizeof("250 AUTH") - 1 + sizeof(CRLF) - 1; | |
221 } | |
222 | |
2049 | 223 p = ngx_pnalloc(cf->pool, size); |
583 | 224 if (p == NULL) { |
225 return NGX_CONF_ERROR; | |
226 } | |
227 | |
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228 conf->capability.len = size; |
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229 conf->capability.data = p; |
1136 | 230 |
2309 | 231 last = p; |
232 | |
1136 | 233 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-'; |
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234 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
1136 | 235 *p++ = CR; *p++ = LF; |
236 | |
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237 for (i = 0; i < conf->capabilities.nelts; i++) { |
2309 | 238 last = p; |
1136 | 239 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-'; |
240 p = ngx_cpymem(p, c[i].data, c[i].len); | |
241 *p++ = CR; *p++ = LF; | |
242 } | |
243 | |
1322 | 244 auth = p; |
245 | |
2309 | 246 if (auth_enabled) { |
247 last = p; | |
248 | |
249 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' '; | |
250 *p++ = 'A'; *p++ = 'U'; *p++ = 'T'; *p++ = 'H'; | |
1136 | 251 |
2309 | 252 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
253 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED; | |
254 m <<= 1, i++) | |
255 { | |
256 if (m & conf->auth_methods) { | |
257 *p++ = ' '; | |
258 p = ngx_cpymem(p, ngx_mail_smtp_auth_methods_names[i].data, | |
259 ngx_mail_smtp_auth_methods_names[i].len); | |
260 } | |
1136 | 261 } |
2309 | 262 |
263 *p++ = CR; *p = LF; | |
1136 | 264 |
2309 | 265 } else { |
266 last[3] = ' '; | |
267 } | |
1136 | 268 |
1322 | 269 size += sizeof("250 STARTTLS" CRLF) - 1; |
270 | |
2049 | 271 p = ngx_pnalloc(cf->pool, size); |
1322 | 272 if (p == NULL) { |
273 return NGX_CONF_ERROR; | |
274 } | |
275 | |
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276 conf->starttls_capability.len = size; |
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277 conf->starttls_capability.data = p; |
1322 | 278 |
2309 | 279 p = ngx_cpymem(p, conf->capability.data, conf->capability.len); |
1322 | 280 |
281 p = ngx_cpymem(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1); | |
282 | |
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283 p = conf->starttls_capability.data |
2309 | 284 + (last - conf->capability.data) + 3; |
1322 | 285 *p = '-'; |
286 | |
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287 size = (auth - conf->capability.data) |
1322 | 288 + sizeof("250 STARTTLS" CRLF) - 1; |
289 | |
2049 | 290 p = ngx_pnalloc(cf->pool, size); |
1322 | 291 if (p == NULL) { |
292 return NGX_CONF_ERROR; | |
293 } | |
294 | |
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295 conf->starttls_only_capability.len = size; |
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296 conf->starttls_only_capability.data = p; |
1322 | 297 |
2309 | 298 p = ngx_cpymem(p, conf->capability.data, auth - conf->capability.data); |
1322 | 299 |
300 ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1); | |
301 | |
2309 | 302 if (last < auth) { |
303 p = conf->starttls_only_capability.data | |
304 + (last - conf->capability.data) + 3; | |
305 *p = '-'; | |
306 } | |
307 | |
521 | 308 return NGX_CONF_OK; |
309 } |