Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail.h @ 8551:c35b255d80dc quic
HTTP/3: close connection on keepalive_requests * 2.
After receiving GOAWAY, client is not supposed to create new streams. However,
until client reads this frame, we allow it to create new streams, which are
gracefully rejected. To prevent client from abusing this algorithm, a new
limit is introduced. Upon reaching keepalive_requests * 2, server now closes
the entire QUIC connection claiming excessive load.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Thu, 29 Jul 2021 16:01:37 +0300 |
parents | ec1071830799 |
children | dc955d274130 |
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 | |
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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; |
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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 */ |
419
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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 in_port_t port[4]; |
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328 ngx_uint_t type; |
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329 |
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330 ngx_mail_init_session_pt init_session; |
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331 ngx_mail_init_protocol_pt init_protocol; |
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332 ngx_mail_parse_command_pt parse_command; |
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333 ngx_mail_auth_state_pt auth_state; |
1136 | 334 |
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335 ngx_str_t internal_server_error; |
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336 ngx_str_t cert_error; |
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337 ngx_str_t no_cert; |
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338 }; |
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339 |
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340 |
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341 typedef struct { |
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342 ngx_mail_protocol_t *protocol; |
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343 |
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344 void *(*create_main_conf)(ngx_conf_t *cf); |
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345 char *(*init_main_conf)(ngx_conf_t *cf, void *conf); |
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346 |
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347 void *(*create_srv_conf)(ngx_conf_t *cf); |
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348 char *(*merge_srv_conf)(ngx_conf_t *cf, void *prev, |
6474 | 349 void *conf); |
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350 } ngx_mail_module_t; |
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351 |
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352 |
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353 #define NGX_MAIL_MODULE 0x4C49414D /* "MAIL" */ |
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354 |
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355 #define NGX_MAIL_MAIN_CONF 0x02000000 |
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356 #define NGX_MAIL_SRV_CONF 0x04000000 |
1136 | 357 |
358 | |
359 #define NGX_MAIL_MAIN_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, main_conf) | |
360 #define NGX_MAIL_SRV_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, srv_conf) | |
361 | |
362 | |
363 #define ngx_mail_get_module_ctx(s, module) (s)->ctx[module.ctx_index] | |
364 #define ngx_mail_set_ctx(s, c, module) s->ctx[module.ctx_index] = c; | |
365 #define ngx_mail_delete_ctx(s, module) s->ctx[module.ctx_index] = NULL; | |
521 | 366 |
367 | |
1136 | 368 #define ngx_mail_get_module_main_conf(s, module) \ |
521 | 369 (s)->main_conf[module.ctx_index] |
1136 | 370 #define ngx_mail_get_module_srv_conf(s, module) (s)->srv_conf[module.ctx_index] |
423
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371 |
1136 | 372 #define ngx_mail_conf_get_module_main_conf(cf, module) \ |
373 ((ngx_mail_conf_ctx_t *) cf->ctx)->main_conf[module.ctx_index] | |
1322 | 374 #define ngx_mail_conf_get_module_srv_conf(cf, module) \ |
375 ((ngx_mail_conf_ctx_t *) cf->ctx)->srv_conf[module.ctx_index] | |
641 | 376 |
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377 |
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378 #if (NGX_MAIL_SSL) |
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379 void ngx_mail_starttls_handler(ngx_event_t *rev); |
1479 | 380 ngx_int_t ngx_mail_starttls_only(ngx_mail_session_t *s, ngx_connection_t *c); |
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381 #endif |
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382 |
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383 |
1136 | 384 void ngx_mail_init_connection(ngx_connection_t *c); |
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385 |
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386 ngx_int_t ngx_mail_salt(ngx_mail_session_t *s, ngx_connection_t *c, |
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387 ngx_mail_core_srv_conf_t *cscf); |
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388 ngx_int_t ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, |
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389 ngx_uint_t n); |
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390 ngx_int_t ngx_mail_auth_login_username(ngx_mail_session_t *s, |
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391 ngx_connection_t *c, ngx_uint_t n); |
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392 ngx_int_t ngx_mail_auth_login_password(ngx_mail_session_t *s, |
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393 ngx_connection_t *c); |
1479 | 394 ngx_int_t ngx_mail_auth_cram_md5_salt(ngx_mail_session_t *s, |
395 ngx_connection_t *c, char *prefix, size_t len); | |
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396 ngx_int_t ngx_mail_auth_cram_md5(ngx_mail_session_t *s, ngx_connection_t *c); |
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397 ngx_int_t ngx_mail_auth_external(ngx_mail_session_t *s, ngx_connection_t *c, |
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398 ngx_uint_t n); |
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399 ngx_int_t ngx_mail_auth_parse(ngx_mail_session_t *s, ngx_connection_t *c); |
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400 |
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401 void ngx_mail_send(ngx_event_t *wev); |
1482 | 402 ngx_int_t ngx_mail_read_command(ngx_mail_session_t *s, ngx_connection_t *c); |
403 void ngx_mail_auth(ngx_mail_session_t *s, ngx_connection_t *c); | |
1136 | 404 void ngx_mail_close_connection(ngx_connection_t *c); |
405 void ngx_mail_session_internal_server_error(ngx_mail_session_t *s); | |
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406 u_char *ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len); |
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407 |
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408 |
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409 char *ngx_mail_capabilities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); |
419
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410 |
417
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411 |
521 | 412 /* STUB */ |
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413 void ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_addr_t *peer); |
1136 | 414 void ngx_mail_auth_http_init(ngx_mail_session_t *s); |
8344 | 415 ngx_int_t ngx_mail_realip_handler(ngx_mail_session_t *s); |
521 | 416 /**/ |
417 | |
418 | |
1136 | 419 extern ngx_uint_t ngx_mail_max_module; |
420 extern ngx_module_t ngx_mail_core_module; | |
521 | 421 |
422 | |
1136 | 423 #endif /* _NGX_MAIL_H_INCLUDED_ */ |