Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail.h @ 8867:5119c8150478
Fixed runtime handling of systems without EPOLLRDHUP support.
In 7583:efd71d49bde0 (nginx 1.17.5) along with introduction of the
ioctl(FIONREAD) support proper handling of systems without EPOLLRDHUP
support in the kernel (but with EPOLLRDHUP in headers) was broken.
Before the change, rev->available was never set to 0 unless
ngx_use_epoll_rdhup was also set (that is, runtime test for EPOLLRDHUP
introduced in 6536:f7849bfb6d21 succeeded). After the change,
rev->available might reach 0 on systems without runtime EPOLLRDHUP
support, stopping further reading in ngx_readv_chain() and ngx_unix_recv().
And, if EOF happened to be already reported along with the last event,
it is not reported again by epoll_wait(), leading to connection hangs
and timeouts on such systems.
This affects Linux kernels before 2.6.17 if nginx was compiled
with newer headers, and, more importantly, emulation layers, such as
DigitalOcean's App Platform's / gVisor's epoll emulation layer.
Fix is to explicitly check ngx_use_epoll_rdhup before the corresponding
rev->pending_eof tests in ngx_readv_chain() and ngx_unix_recv().
author | Marcus Ball <marcus.ball@live.com> |
---|---|
date | Mon, 30 May 2022 02:38:07 +0300 |
parents | dc955d274130 |
children |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
1136 | 8 #ifndef _NGX_MAIL_H_INCLUDED_ |
9 #define _NGX_MAIL_H_INCLUDED_ | |
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10 |
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11 |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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14 #include <ngx_event.h> |
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15 #include <ngx_event_connect.h> |
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16 |
1136 | 17 #if (NGX_MAIL_SSL) |
18 #include <ngx_mail_ssl_module.h> | |
539 | 19 #endif |
20 | |
21 | |
417
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22 |
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23 typedef struct { |
583 | 24 void **main_conf; |
25 void **srv_conf; | |
1136 | 26 } ngx_mail_conf_ctx_t; |
521 | 27 |
28 | |
29 typedef struct { | |
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30 struct sockaddr *sockaddr; |
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31 socklen_t socklen; |
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32 ngx_str_t addr_text; |
641 | 33 |
34 /* server ctx */ | |
1136 | 35 ngx_mail_conf_ctx_t *ctx; |
641 | 36 |
37 unsigned bind:1; | |
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38 unsigned wildcard:1; |
2224 | 39 unsigned ssl:1; |
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40 #if (NGX_HAVE_INET6) |
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41 unsigned ipv6only:1; |
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42 #endif |
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43 unsigned so_keepalive:2; |
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44 unsigned proxy_protocol:1; |
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45 #if (NGX_HAVE_KEEPALIVE_TUNABLE) |
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46 int tcp_keepidle; |
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47 int tcp_keepintvl; |
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48 int tcp_keepcnt; |
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49 #endif |
6173 | 50 int backlog; |
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51 int rcvbuf; |
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52 int sndbuf; |
1136 | 53 } ngx_mail_listen_t; |
641 | 54 |
55 | |
56 typedef struct { | |
1136 | 57 ngx_mail_conf_ctx_t *ctx; |
641 | 58 ngx_str_t addr_text; |
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59 unsigned ssl:1; |
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60 unsigned proxy_protocol:1; |
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61 } ngx_mail_addr_conf_t; |
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62 |
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63 typedef struct { |
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64 in_addr_t addr; |
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65 ngx_mail_addr_conf_t conf; |
1136 | 66 } ngx_mail_in_addr_t; |
641 | 67 |
68 | |
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69 #if (NGX_HAVE_INET6) |
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70 |
641 | 71 typedef struct { |
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72 struct in6_addr addr6; |
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73 ngx_mail_addr_conf_t conf; |
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74 } ngx_mail_in6_addr_t; |
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75 |
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76 #endif |
641 | 77 |
78 | |
79 typedef struct { | |
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80 /* ngx_mail_in_addr_t or ngx_mail_in6_addr_t */ |
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81 void *addrs; |
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82 ngx_uint_t naddrs; |
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83 } ngx_mail_port_t; |
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84 |
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85 |
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86 typedef struct { |
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87 int family; |
641 | 88 in_port_t port; |
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89 ngx_array_t addrs; /* array of ngx_mail_conf_addr_t */ |
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90 } ngx_mail_conf_port_t; |
641 | 91 |
92 | |
93 typedef struct { | |
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94 ngx_mail_listen_t opt; |
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95 } ngx_mail_conf_addr_t; |
641 | 96 |
97 | |
98 typedef struct { | |
1136 | 99 ngx_array_t servers; /* ngx_mail_core_srv_conf_t */ |
100 ngx_array_t listen; /* ngx_mail_listen_t */ | |
101 } ngx_mail_core_main_conf_t; | |
521 | 102 |
103 | |
1136 | 104 #define NGX_MAIL_POP3_PROTOCOL 0 |
105 #define NGX_MAIL_IMAP_PROTOCOL 1 | |
106 #define NGX_MAIL_SMTP_PROTOCOL 2 | |
521 | 107 |
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108 |
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109 typedef struct ngx_mail_protocol_s ngx_mail_protocol_t; |
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110 |
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111 |
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112 typedef struct { |
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113 ngx_mail_protocol_t *protocol; |
521 | 114 |
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115 ngx_msec_t timeout; |
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116 ngx_msec_t resolver_timeout; |
521 | 117 |
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118 ngx_uint_t max_errors; |
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119 |
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120 ngx_str_t server_name; |
527 | 121 |
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122 u_char *file_name; |
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123 ngx_uint_t line; |
527 | 124 |
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125 ngx_resolver_t *resolver; |
6130 | 126 ngx_log_t *error_log; |
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127 |
521 | 128 /* server ctx */ |
1136 | 129 ngx_mail_conf_ctx_t *ctx; |
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130 |
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131 ngx_uint_t listen; /* unsigned listen:1; */ |
1136 | 132 } ngx_mail_core_srv_conf_t; |
521 | 133 |
134 | |
527 | 135 typedef enum { |
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136 ngx_pop3_start = 0, |
527 | 137 ngx_pop3_user, |
809 | 138 ngx_pop3_passwd, |
139 ngx_pop3_auth_login_username, | |
140 ngx_pop3_auth_login_password, | |
141 ngx_pop3_auth_plain, | |
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142 ngx_pop3_auth_cram_md5, |
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143 ngx_pop3_auth_external |
1673 | 144 } ngx_pop3_state_e; |
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145 |
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146 |
1136 | 147 typedef enum { |
148 ngx_imap_start = 0, | |
1323 | 149 ngx_imap_auth_login_username, |
150 ngx_imap_auth_login_password, | |
151 ngx_imap_auth_plain, | |
152 ngx_imap_auth_cram_md5, | |
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153 ngx_imap_auth_external, |
1136 | 154 ngx_imap_login, |
155 ngx_imap_user, | |
156 ngx_imap_passwd | |
157 } ngx_imap_state_e; | |
158 | |
159 | |
160 typedef enum { | |
161 ngx_smtp_start = 0, | |
162 ngx_smtp_auth_login_username, | |
163 ngx_smtp_auth_login_password, | |
164 ngx_smtp_auth_plain, | |
165 ngx_smtp_auth_cram_md5, | |
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166 ngx_smtp_auth_external, |
1136 | 167 ngx_smtp_helo, |
2309 | 168 ngx_smtp_helo_xclient, |
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169 ngx_smtp_helo_auth, |
2309 | 170 ngx_smtp_helo_from, |
171 ngx_smtp_xclient, | |
172 ngx_smtp_xclient_from, | |
2497 | 173 ngx_smtp_xclient_helo, |
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174 ngx_smtp_xclient_auth, |
2309 | 175 ngx_smtp_from, |
176 ngx_smtp_to | |
1136 | 177 } ngx_smtp_state_e; |
178 | |
179 | |
418
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180 typedef struct { |
521 | 181 ngx_peer_connection_t upstream; |
182 ngx_buf_t *buffer; | |
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183 ngx_uint_t proxy_protocol; /* unsigned proxy_protocol:1; */ |
1136 | 184 } ngx_mail_proxy_ctx_t; |
521 | 185 |
186 | |
187 typedef struct { | |
1136 | 188 uint32_t signature; /* "MAIL" */ |
419
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189 |
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190 ngx_connection_t *connection; |
521 | 191 |
539 | 192 ngx_str_t out; |
419
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193 ngx_buf_t *buffer; |
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194 |
521 | 195 void **ctx; |
196 void **main_conf; | |
197 void **srv_conf; | |
198 | |
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199 ngx_resolver_ctx_t *resolver_ctx; |
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200 |
1136 | 201 ngx_mail_proxy_ctx_t *proxy; |
521 | 202 |
1136 | 203 ngx_uint_t mail_state; |
421
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204 |
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205 unsigned ssl:1; |
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206 unsigned protocol:3; |
539 | 207 unsigned blocked:1; |
208 unsigned quit:1; | |
527 | 209 unsigned quoted:1; |
543 | 210 unsigned backslash:1; |
211 unsigned no_sync_literal:1; | |
641 | 212 unsigned starttls:1; |
1136 | 213 unsigned esmtp:1; |
2309 | 214 unsigned auth_method:3; |
883 | 215 unsigned auth_wait:1; |
418
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216 |
422
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217 ngx_str_t login; |
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218 ngx_str_t passwd; |
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219 |
800 | 220 ngx_str_t salt; |
527 | 221 ngx_str_t tag; |
539 | 222 ngx_str_t tagged_line; |
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223 ngx_str_t text; |
527 | 224 |
641 | 225 ngx_str_t *addr_text; |
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226 ngx_str_t host; |
1136 | 227 ngx_str_t smtp_helo; |
2309 | 228 ngx_str_t smtp_from; |
229 ngx_str_t smtp_to; | |
641 | 230 |
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231 ngx_str_t cmd; |
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232 |
419
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233 ngx_uint_t command; |
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234 ngx_array_t args; |
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235 |
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236 ngx_uint_t errors; |
527 | 237 ngx_uint_t login_attempt; |
238 | |
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239 /* used to parse POP3/IMAP/SMTP command */ |
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240 |
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241 ngx_uint_t state; |
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242 u_char *tag_start; |
527 | 243 u_char *cmd_start; |
419
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244 u_char *arg_start; |
527 | 245 ngx_uint_t literal_len; |
1136 | 246 } ngx_mail_session_t; |
418
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247 |
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248 |
541 | 249 typedef struct { |
583 | 250 ngx_str_t *client; |
1136 | 251 ngx_mail_session_t *session; |
252 } ngx_mail_log_ctx_t; | |
541 | 253 |
254 | |
1323 | 255 #define NGX_POP3_USER 1 |
256 #define NGX_POP3_PASS 2 | |
257 #define NGX_POP3_CAPA 3 | |
258 #define NGX_POP3_QUIT 4 | |
259 #define NGX_POP3_NOOP 5 | |
260 #define NGX_POP3_STLS 6 | |
261 #define NGX_POP3_APOP 7 | |
262 #define NGX_POP3_AUTH 8 | |
263 #define NGX_POP3_STAT 9 | |
264 #define NGX_POP3_LIST 10 | |
265 #define NGX_POP3_RETR 11 | |
266 #define NGX_POP3_DELE 12 | |
267 #define NGX_POP3_RSET 13 | |
268 #define NGX_POP3_TOP 14 | |
269 #define NGX_POP3_UIDL 15 | |
419
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270 |
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271 |
1323 | 272 #define NGX_IMAP_LOGIN 1 |
273 #define NGX_IMAP_LOGOUT 2 | |
274 #define NGX_IMAP_CAPABILITY 3 | |
275 #define NGX_IMAP_NOOP 4 | |
276 #define NGX_IMAP_STARTTLS 5 | |
800 | 277 |
1323 | 278 #define NGX_IMAP_NEXT 6 |
279 | |
280 #define NGX_IMAP_AUTHENTICATE 7 | |
527 | 281 |
800 | 282 |
1323 | 283 #define NGX_SMTP_HELO 1 |
284 #define NGX_SMTP_EHLO 2 | |
285 #define NGX_SMTP_AUTH 3 | |
286 #define NGX_SMTP_QUIT 4 | |
287 #define NGX_SMTP_NOOP 5 | |
288 #define NGX_SMTP_MAIL 6 | |
289 #define NGX_SMTP_RSET 7 | |
290 #define NGX_SMTP_RCPT 8 | |
291 #define NGX_SMTP_DATA 9 | |
292 #define NGX_SMTP_VRFY 10 | |
293 #define NGX_SMTP_EXPN 11 | |
294 #define NGX_SMTP_HELP 12 | |
295 #define NGX_SMTP_STARTTLS 13 | |
527 | 296 |
297 | |
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298 #define NGX_MAIL_AUTH_PLAIN 0 |
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299 #define NGX_MAIL_AUTH_LOGIN 1 |
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300 #define NGX_MAIL_AUTH_LOGIN_USERNAME 2 |
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301 #define NGX_MAIL_AUTH_APOP 3 |
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302 #define NGX_MAIL_AUTH_CRAM_MD5 4 |
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303 #define NGX_MAIL_AUTH_EXTERNAL 5 |
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304 #define NGX_MAIL_AUTH_NONE 6 |
419
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305 |
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306 |
1136 | 307 #define NGX_MAIL_AUTH_PLAIN_ENABLED 0x0002 |
308 #define NGX_MAIL_AUTH_LOGIN_ENABLED 0x0004 | |
309 #define NGX_MAIL_AUTH_APOP_ENABLED 0x0008 | |
310 #define NGX_MAIL_AUTH_CRAM_MD5_ENABLED 0x0010 | |
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311 #define NGX_MAIL_AUTH_EXTERNAL_ENABLED 0x0020 |
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312 #define NGX_MAIL_AUTH_NONE_ENABLED 0x0040 |
521 | 313 |
314 | |
1136 | 315 #define NGX_MAIL_PARSE_INVALID_COMMAND 20 |
521 | 316 |
317 | |
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318 typedef void (*ngx_mail_init_session_pt)(ngx_mail_session_t *s, |
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319 ngx_connection_t *c); |
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320 typedef void (*ngx_mail_init_protocol_pt)(ngx_event_t *rev); |
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321 typedef void (*ngx_mail_auth_state_pt)(ngx_event_t *rev); |
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322 typedef ngx_int_t (*ngx_mail_parse_command_pt)(ngx_mail_session_t *s); |
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323 |
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324 |
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325 struct ngx_mail_protocol_s { |
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326 ngx_str_t name; |
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327 ngx_str_t alpn; |
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328 in_port_t port[4]; |
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329 ngx_uint_t type; |
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330 |
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331 ngx_mail_init_session_pt init_session; |
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332 ngx_mail_init_protocol_pt init_protocol; |
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333 ngx_mail_parse_command_pt parse_command; |
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334 ngx_mail_auth_state_pt auth_state; |
1136 | 335 |
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336 ngx_str_t internal_server_error; |
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337 ngx_str_t cert_error; |
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338 ngx_str_t no_cert; |
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339 }; |
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340 |
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341 |
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342 typedef struct { |
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343 ngx_mail_protocol_t *protocol; |
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344 |
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345 void *(*create_main_conf)(ngx_conf_t *cf); |
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346 char *(*init_main_conf)(ngx_conf_t *cf, void *conf); |
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347 |
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348 void *(*create_srv_conf)(ngx_conf_t *cf); |
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349 char *(*merge_srv_conf)(ngx_conf_t *cf, void *prev, |
6474 | 350 void *conf); |
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351 } ngx_mail_module_t; |
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352 |
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353 |
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354 #define NGX_MAIL_MODULE 0x4C49414D /* "MAIL" */ |
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355 |
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356 #define NGX_MAIL_MAIN_CONF 0x02000000 |
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357 #define NGX_MAIL_SRV_CONF 0x04000000 |
1136 | 358 |
359 | |
360 #define NGX_MAIL_MAIN_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, main_conf) | |
361 #define NGX_MAIL_SRV_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, srv_conf) | |
362 | |
363 | |
364 #define ngx_mail_get_module_ctx(s, module) (s)->ctx[module.ctx_index] | |
365 #define ngx_mail_set_ctx(s, c, module) s->ctx[module.ctx_index] = c; | |
366 #define ngx_mail_delete_ctx(s, module) s->ctx[module.ctx_index] = NULL; | |
521 | 367 |
368 | |
1136 | 369 #define ngx_mail_get_module_main_conf(s, module) \ |
521 | 370 (s)->main_conf[module.ctx_index] |
1136 | 371 #define ngx_mail_get_module_srv_conf(s, module) (s)->srv_conf[module.ctx_index] |
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372 |
1136 | 373 #define ngx_mail_conf_get_module_main_conf(cf, module) \ |
374 ((ngx_mail_conf_ctx_t *) cf->ctx)->main_conf[module.ctx_index] | |
1322 | 375 #define ngx_mail_conf_get_module_srv_conf(cf, module) \ |
376 ((ngx_mail_conf_ctx_t *) cf->ctx)->srv_conf[module.ctx_index] | |
641 | 377 |
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378 |
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379 #if (NGX_MAIL_SSL) |
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380 void ngx_mail_starttls_handler(ngx_event_t *rev); |
1479 | 381 ngx_int_t ngx_mail_starttls_only(ngx_mail_session_t *s, ngx_connection_t *c); |
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382 #endif |
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383 |
423
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384 |
1136 | 385 void ngx_mail_init_connection(ngx_connection_t *c); |
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386 |
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387 ngx_int_t ngx_mail_salt(ngx_mail_session_t *s, ngx_connection_t *c, |
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388 ngx_mail_core_srv_conf_t *cscf); |
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389 ngx_int_t ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, |
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390 ngx_uint_t n); |
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391 ngx_int_t ngx_mail_auth_login_username(ngx_mail_session_t *s, |
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392 ngx_connection_t *c, ngx_uint_t n); |
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393 ngx_int_t ngx_mail_auth_login_password(ngx_mail_session_t *s, |
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394 ngx_connection_t *c); |
1479 | 395 ngx_int_t ngx_mail_auth_cram_md5_salt(ngx_mail_session_t *s, |
396 ngx_connection_t *c, char *prefix, size_t len); | |
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397 ngx_int_t ngx_mail_auth_cram_md5(ngx_mail_session_t *s, ngx_connection_t *c); |
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398 ngx_int_t ngx_mail_auth_external(ngx_mail_session_t *s, ngx_connection_t *c, |
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399 ngx_uint_t n); |
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400 ngx_int_t ngx_mail_auth_parse(ngx_mail_session_t *s, ngx_connection_t *c); |
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401 |
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402 void ngx_mail_send(ngx_event_t *wev); |
1482 | 403 ngx_int_t ngx_mail_read_command(ngx_mail_session_t *s, ngx_connection_t *c); |
404 void ngx_mail_auth(ngx_mail_session_t *s, ngx_connection_t *c); | |
1136 | 405 void ngx_mail_close_connection(ngx_connection_t *c); |
406 void ngx_mail_session_internal_server_error(ngx_mail_session_t *s); | |
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407 u_char *ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len); |
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408 |
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409 |
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410 char *ngx_mail_capabilities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); |
419
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411 |
417
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412 |
521 | 413 /* STUB */ |
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414 void ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_addr_t *peer); |
1136 | 415 void ngx_mail_auth_http_init(ngx_mail_session_t *s); |
8344 | 416 ngx_int_t ngx_mail_realip_handler(ngx_mail_session_t *s); |
521 | 417 /**/ |
418 | |
419 | |
1136 | 420 extern ngx_uint_t ngx_mail_max_module; |
421 extern ngx_module_t ngx_mail_core_module; | |
521 | 422 |
423 | |
1136 | 424 #endif /* _NGX_MAIL_H_INCLUDED_ */ |