Mercurial > hg > nginx
annotate src/mail/ngx_mail.h @ 9236:d9a52ebb9b00
Mail: max_commands directive.
The directive specifies the maximum number of commands allowed during
authentication, after which the connection is closed. The default
limit is 1000, which is not expected to affect any well-behaving clients,
since authentication usually requires at most several commands, though
will effectively stop malicious clients from flooding the server with
with commands.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Sat, 30 Mar 2024 05:05:53 +0300 |
parents | dc955d274130 |
children | 4538c1ffb0f8 |
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 ngx_uint_t max_commands; |
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120 |
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121 ngx_str_t server_name; |
527 | 122 |
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123 u_char *file_name; |
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124 ngx_uint_t line; |
527 | 125 |
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126 ngx_resolver_t *resolver; |
6130 | 127 ngx_log_t *error_log; |
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128 |
521 | 129 /* server ctx */ |
1136 | 130 ngx_mail_conf_ctx_t *ctx; |
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131 |
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132 ngx_uint_t listen; /* unsigned listen:1; */ |
1136 | 133 } ngx_mail_core_srv_conf_t; |
521 | 134 |
135 | |
527 | 136 typedef enum { |
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137 ngx_pop3_start = 0, |
527 | 138 ngx_pop3_user, |
809 | 139 ngx_pop3_passwd, |
140 ngx_pop3_auth_login_username, | |
141 ngx_pop3_auth_login_password, | |
142 ngx_pop3_auth_plain, | |
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143 ngx_pop3_auth_cram_md5, |
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144 ngx_pop3_auth_external |
1673 | 145 } ngx_pop3_state_e; |
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146 |
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147 |
1136 | 148 typedef enum { |
149 ngx_imap_start = 0, | |
1323 | 150 ngx_imap_auth_login_username, |
151 ngx_imap_auth_login_password, | |
152 ngx_imap_auth_plain, | |
153 ngx_imap_auth_cram_md5, | |
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154 ngx_imap_auth_external, |
1136 | 155 ngx_imap_login, |
156 ngx_imap_user, | |
157 ngx_imap_passwd | |
158 } ngx_imap_state_e; | |
159 | |
160 | |
161 typedef enum { | |
162 ngx_smtp_start = 0, | |
163 ngx_smtp_auth_login_username, | |
164 ngx_smtp_auth_login_password, | |
165 ngx_smtp_auth_plain, | |
166 ngx_smtp_auth_cram_md5, | |
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167 ngx_smtp_auth_external, |
1136 | 168 ngx_smtp_helo, |
2309 | 169 ngx_smtp_helo_xclient, |
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170 ngx_smtp_helo_auth, |
2309 | 171 ngx_smtp_helo_from, |
172 ngx_smtp_xclient, | |
173 ngx_smtp_xclient_from, | |
2497 | 174 ngx_smtp_xclient_helo, |
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175 ngx_smtp_xclient_auth, |
2309 | 176 ngx_smtp_from, |
177 ngx_smtp_to | |
1136 | 178 } ngx_smtp_state_e; |
179 | |
180 | |
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181 typedef struct { |
521 | 182 ngx_peer_connection_t upstream; |
183 ngx_buf_t *buffer; | |
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184 ngx_uint_t proxy_protocol; /* unsigned proxy_protocol:1; */ |
1136 | 185 } ngx_mail_proxy_ctx_t; |
521 | 186 |
187 | |
188 typedef struct { | |
1136 | 189 uint32_t signature; /* "MAIL" */ |
419
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190 |
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191 ngx_connection_t *connection; |
521 | 192 |
539 | 193 ngx_str_t out; |
419
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194 ngx_buf_t *buffer; |
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195 |
521 | 196 void **ctx; |
197 void **main_conf; | |
198 void **srv_conf; | |
199 | |
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200 ngx_resolver_ctx_t *resolver_ctx; |
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201 |
1136 | 202 ngx_mail_proxy_ctx_t *proxy; |
521 | 203 |
1136 | 204 ngx_uint_t mail_state; |
421
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205 |
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206 unsigned ssl:1; |
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207 unsigned protocol:3; |
539 | 208 unsigned blocked:1; |
209 unsigned quit:1; | |
527 | 210 unsigned quoted:1; |
543 | 211 unsigned backslash:1; |
212 unsigned no_sync_literal:1; | |
641 | 213 unsigned starttls:1; |
1136 | 214 unsigned esmtp:1; |
2309 | 215 unsigned auth_method:3; |
883 | 216 unsigned auth_wait:1; |
418
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217 |
422
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218 ngx_str_t login; |
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219 ngx_str_t passwd; |
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220 |
800 | 221 ngx_str_t salt; |
527 | 222 ngx_str_t tag; |
539 | 223 ngx_str_t tagged_line; |
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224 ngx_str_t text; |
527 | 225 |
641 | 226 ngx_str_t *addr_text; |
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227 ngx_str_t host; |
1136 | 228 ngx_str_t smtp_helo; |
2309 | 229 ngx_str_t smtp_from; |
230 ngx_str_t smtp_to; | |
641 | 231 |
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232 ngx_str_t cmd; |
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233 |
419
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234 ngx_uint_t command; |
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235 ngx_array_t args; |
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236 |
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237 ngx_uint_t errors; |
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238 ngx_uint_t commands; |
527 | 239 ngx_uint_t login_attempt; |
240 | |
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241 /* used to parse POP3/IMAP/SMTP command */ |
419
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242 |
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243 ngx_uint_t state; |
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244 u_char *tag_start; |
527 | 245 u_char *cmd_start; |
419
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246 u_char *arg_start; |
527 | 247 ngx_uint_t literal_len; |
1136 | 248 } ngx_mail_session_t; |
418
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249 |
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250 |
541 | 251 typedef struct { |
583 | 252 ngx_str_t *client; |
1136 | 253 ngx_mail_session_t *session; |
254 } ngx_mail_log_ctx_t; | |
541 | 255 |
256 | |
1323 | 257 #define NGX_POP3_USER 1 |
258 #define NGX_POP3_PASS 2 | |
259 #define NGX_POP3_CAPA 3 | |
260 #define NGX_POP3_QUIT 4 | |
261 #define NGX_POP3_NOOP 5 | |
262 #define NGX_POP3_STLS 6 | |
263 #define NGX_POP3_APOP 7 | |
264 #define NGX_POP3_AUTH 8 | |
265 #define NGX_POP3_STAT 9 | |
266 #define NGX_POP3_LIST 10 | |
267 #define NGX_POP3_RETR 11 | |
268 #define NGX_POP3_DELE 12 | |
269 #define NGX_POP3_RSET 13 | |
270 #define NGX_POP3_TOP 14 | |
271 #define NGX_POP3_UIDL 15 | |
419
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272 |
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273 |
1323 | 274 #define NGX_IMAP_LOGIN 1 |
275 #define NGX_IMAP_LOGOUT 2 | |
276 #define NGX_IMAP_CAPABILITY 3 | |
277 #define NGX_IMAP_NOOP 4 | |
278 #define NGX_IMAP_STARTTLS 5 | |
800 | 279 |
1323 | 280 #define NGX_IMAP_NEXT 6 |
281 | |
282 #define NGX_IMAP_AUTHENTICATE 7 | |
527 | 283 |
800 | 284 |
1323 | 285 #define NGX_SMTP_HELO 1 |
286 #define NGX_SMTP_EHLO 2 | |
287 #define NGX_SMTP_AUTH 3 | |
288 #define NGX_SMTP_QUIT 4 | |
289 #define NGX_SMTP_NOOP 5 | |
290 #define NGX_SMTP_MAIL 6 | |
291 #define NGX_SMTP_RSET 7 | |
292 #define NGX_SMTP_RCPT 8 | |
293 #define NGX_SMTP_DATA 9 | |
294 #define NGX_SMTP_VRFY 10 | |
295 #define NGX_SMTP_EXPN 11 | |
296 #define NGX_SMTP_HELP 12 | |
297 #define NGX_SMTP_STARTTLS 13 | |
527 | 298 |
299 | |
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300 #define NGX_MAIL_AUTH_PLAIN 0 |
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301 #define NGX_MAIL_AUTH_LOGIN 1 |
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302 #define NGX_MAIL_AUTH_LOGIN_USERNAME 2 |
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303 #define NGX_MAIL_AUTH_APOP 3 |
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304 #define NGX_MAIL_AUTH_CRAM_MD5 4 |
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305 #define NGX_MAIL_AUTH_EXTERNAL 5 |
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306 #define NGX_MAIL_AUTH_NONE 6 |
419
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307 |
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308 |
1136 | 309 #define NGX_MAIL_AUTH_PLAIN_ENABLED 0x0002 |
310 #define NGX_MAIL_AUTH_LOGIN_ENABLED 0x0004 | |
311 #define NGX_MAIL_AUTH_APOP_ENABLED 0x0008 | |
312 #define NGX_MAIL_AUTH_CRAM_MD5_ENABLED 0x0010 | |
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313 #define NGX_MAIL_AUTH_EXTERNAL_ENABLED 0x0020 |
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314 #define NGX_MAIL_AUTH_NONE_ENABLED 0x0040 |
521 | 315 |
316 | |
1136 | 317 #define NGX_MAIL_PARSE_INVALID_COMMAND 20 |
521 | 318 |
319 | |
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320 typedef void (*ngx_mail_init_session_pt)(ngx_mail_session_t *s, |
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321 ngx_connection_t *c); |
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322 typedef void (*ngx_mail_init_protocol_pt)(ngx_event_t *rev); |
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323 typedef void (*ngx_mail_auth_state_pt)(ngx_event_t *rev); |
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324 typedef ngx_int_t (*ngx_mail_parse_command_pt)(ngx_mail_session_t *s); |
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325 |
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326 |
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327 struct ngx_mail_protocol_s { |
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328 ngx_str_t name; |
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329 ngx_str_t alpn; |
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330 in_port_t port[4]; |
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331 ngx_uint_t type; |
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332 |
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333 ngx_mail_init_session_pt init_session; |
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334 ngx_mail_init_protocol_pt init_protocol; |
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335 ngx_mail_parse_command_pt parse_command; |
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336 ngx_mail_auth_state_pt auth_state; |
1136 | 337 |
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338 ngx_str_t internal_server_error; |
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339 ngx_str_t cert_error; |
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340 ngx_str_t no_cert; |
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341 }; |
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342 |
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343 |
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344 typedef struct { |
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345 ngx_mail_protocol_t *protocol; |
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346 |
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347 void *(*create_main_conf)(ngx_conf_t *cf); |
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348 char *(*init_main_conf)(ngx_conf_t *cf, void *conf); |
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349 |
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350 void *(*create_srv_conf)(ngx_conf_t *cf); |
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351 char *(*merge_srv_conf)(ngx_conf_t *cf, void *prev, |
6474 | 352 void *conf); |
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353 } ngx_mail_module_t; |
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354 |
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355 |
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356 #define NGX_MAIL_MODULE 0x4C49414D /* "MAIL" */ |
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357 |
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358 #define NGX_MAIL_MAIN_CONF 0x02000000 |
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359 #define NGX_MAIL_SRV_CONF 0x04000000 |
1136 | 360 |
361 | |
362 #define NGX_MAIL_MAIN_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, main_conf) | |
363 #define NGX_MAIL_SRV_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, srv_conf) | |
364 | |
365 | |
366 #define ngx_mail_get_module_ctx(s, module) (s)->ctx[module.ctx_index] | |
367 #define ngx_mail_set_ctx(s, c, module) s->ctx[module.ctx_index] = c; | |
368 #define ngx_mail_delete_ctx(s, module) s->ctx[module.ctx_index] = NULL; | |
521 | 369 |
370 | |
1136 | 371 #define ngx_mail_get_module_main_conf(s, module) \ |
521 | 372 (s)->main_conf[module.ctx_index] |
1136 | 373 #define ngx_mail_get_module_srv_conf(s, module) (s)->srv_conf[module.ctx_index] |
423
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374 |
1136 | 375 #define ngx_mail_conf_get_module_main_conf(cf, module) \ |
376 ((ngx_mail_conf_ctx_t *) cf->ctx)->main_conf[module.ctx_index] | |
1322 | 377 #define ngx_mail_conf_get_module_srv_conf(cf, module) \ |
378 ((ngx_mail_conf_ctx_t *) cf->ctx)->srv_conf[module.ctx_index] | |
641 | 379 |
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380 |
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381 #if (NGX_MAIL_SSL) |
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382 void ngx_mail_starttls_handler(ngx_event_t *rev); |
1479 | 383 ngx_int_t ngx_mail_starttls_only(ngx_mail_session_t *s, ngx_connection_t *c); |
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384 #endif |
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385 |
423
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386 |
1136 | 387 void ngx_mail_init_connection(ngx_connection_t *c); |
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388 |
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389 ngx_int_t ngx_mail_salt(ngx_mail_session_t *s, ngx_connection_t *c, |
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390 ngx_mail_core_srv_conf_t *cscf); |
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391 ngx_int_t ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, |
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392 ngx_uint_t n); |
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393 ngx_int_t ngx_mail_auth_login_username(ngx_mail_session_t *s, |
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394 ngx_connection_t *c, ngx_uint_t n); |
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395 ngx_int_t ngx_mail_auth_login_password(ngx_mail_session_t *s, |
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396 ngx_connection_t *c); |
1479 | 397 ngx_int_t ngx_mail_auth_cram_md5_salt(ngx_mail_session_t *s, |
398 ngx_connection_t *c, char *prefix, size_t len); | |
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399 ngx_int_t ngx_mail_auth_cram_md5(ngx_mail_session_t *s, ngx_connection_t *c); |
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400 ngx_int_t ngx_mail_auth_external(ngx_mail_session_t *s, ngx_connection_t *c, |
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401 ngx_uint_t n); |
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402 ngx_int_t ngx_mail_auth_parse(ngx_mail_session_t *s, ngx_connection_t *c); |
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403 |
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404 void ngx_mail_send(ngx_event_t *wev); |
1482 | 405 ngx_int_t ngx_mail_read_command(ngx_mail_session_t *s, ngx_connection_t *c); |
406 void ngx_mail_auth(ngx_mail_session_t *s, ngx_connection_t *c); | |
1136 | 407 void ngx_mail_close_connection(ngx_connection_t *c); |
408 void ngx_mail_session_internal_server_error(ngx_mail_session_t *s); | |
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409 u_char *ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len); |
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410 |
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411 |
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412 char *ngx_mail_capabilities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); |
419
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413 |
417
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414 |
521 | 415 /* STUB */ |
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416 void ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_addr_t *peer); |
1136 | 417 void ngx_mail_auth_http_init(ngx_mail_session_t *s); |
7795 | 418 ngx_int_t ngx_mail_realip_handler(ngx_mail_session_t *s); |
521 | 419 /**/ |
420 | |
421 | |
1136 | 422 extern ngx_uint_t ngx_mail_max_module; |
423 extern ngx_module_t ngx_mail_core_module; | |
521 | 424 |
425 | |
1136 | 426 #endif /* _NGX_MAIL_H_INCLUDED_ */ |