Mercurial > hg > nginx-quic
annotate src/mail/ngx_mail_imap_module.c @ 8797:1e2f4e9c8195 quic
QUIC: reworked migration handling.
The quic connection now holds active, backup and probe paths instead
of sockets. The number of migration paths is now limited and cannot
be inflated by a bad client or an attacker.
The client id is now associated with path rather than socket. This allows
to simplify processing of output and connection ids handling.
New migration abandons any previously started migrations. This allows to
free consumed client ids and request new for use in future migrations and
make progress in case when connection id limit is hit during migration.
A path now can be revalidated without losing its state.
The patch also fixes various issues with NAT rebinding case handling:
- paths are now validated (previously, there was no validation
and paths were left in limited state)
- attempt to reuse id on different path is now again verified
(this was broken in 40445fc7c403)
- former path is now validated in case of apparent migration
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 19 Jan 2022 22:39:24 +0300 |
parents | dc955d274130 |
children |
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_imap_module.h> |
521 | 13 |
14 | |
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15 static void *ngx_mail_imap_create_srv_conf(ngx_conf_t *cf); |
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16 static char *ngx_mail_imap_merge_srv_conf(ngx_conf_t *cf, void *parent, |
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17 void *child); |
521 | 18 |
19 | |
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20 static ngx_str_t ngx_mail_imap_default_capabilities[] = { |
527 | 21 ngx_string("IMAP4"), |
22 ngx_string("IMAP4rev1"), | |
23 ngx_string("UIDPLUS"), | |
24 ngx_null_string | |
25 }; | |
26 | |
27 | |
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28 static ngx_conf_bitmask_t ngx_mail_imap_auth_methods[] = { |
1323 | 29 { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, |
30 { ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED }, | |
31 { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, | |
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32 { ngx_string("external"), NGX_MAIL_AUTH_EXTERNAL_ENABLED }, |
1323 | 33 { ngx_null_string, 0 } |
34 }; | |
35 | |
36 | |
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37 static ngx_str_t ngx_mail_imap_auth_methods_names[] = { |
1323 | 38 ngx_string("AUTH=PLAIN"), |
39 ngx_string("AUTH=LOGIN"), | |
40 ngx_null_string, /* APOP */ | |
2309 | 41 ngx_string("AUTH=CRAM-MD5"), |
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42 ngx_string("AUTH=EXTERNAL"), |
2309 | 43 ngx_null_string /* NONE */ |
1323 | 44 }; |
45 | |
46 | |
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47 static ngx_mail_protocol_t ngx_mail_imap_protocol = { |
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48 ngx_string("imap"), |
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49 ngx_string("\x04imap"), |
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50 { 143, 993, 0, 0 }, |
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51 NGX_MAIL_IMAP_PROTOCOL, |
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52 |
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53 ngx_mail_imap_init_session, |
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54 ngx_mail_imap_init_protocol, |
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55 ngx_mail_imap_parse_command, |
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56 ngx_mail_imap_auth_state, |
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57 |
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58 ngx_string("* BAD internal server error" CRLF), |
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59 ngx_string("* BYE SSL certificate error" CRLF), |
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60 ngx_string("* BYE No required SSL certificate" CRLF) |
1136 | 61 }; |
62 | |
63 | |
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64 static ngx_command_t ngx_mail_imap_commands[] = { |
521 | 65 |
66 { ngx_string("imap_client_buffer"), | |
1136 | 67 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
521 | 68 ngx_conf_set_size_slot, |
1136 | 69 NGX_MAIL_SRV_CONF_OFFSET, |
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70 offsetof(ngx_mail_imap_srv_conf_t, client_buffer_size), |
527 | 71 NULL }, |
72 | |
73 { ngx_string("imap_capabilities"), | |
1136 | 74 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
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75 ngx_mail_capabilities, |
1136 | 76 NGX_MAIL_SRV_CONF_OFFSET, |
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77 offsetof(ngx_mail_imap_srv_conf_t, capabilities), |
800 | 78 NULL }, |
79 | |
1323 | 80 { ngx_string("imap_auth"), |
81 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
82 ngx_conf_set_bitmask_slot, | |
83 NGX_MAIL_SRV_CONF_OFFSET, | |
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84 offsetof(ngx_mail_imap_srv_conf_t, auth_methods), |
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85 &ngx_mail_imap_auth_methods }, |
800 | 86 |
521 | 87 ngx_null_command |
88 }; | |
89 | |
90 | |
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91 static ngx_mail_module_t ngx_mail_imap_module_ctx = { |
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92 &ngx_mail_imap_protocol, /* protocol */ |
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93 |
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94 NULL, /* create main configuration */ |
521 | 95 NULL, /* init main configuration */ |
96 | |
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97 ngx_mail_imap_create_srv_conf, /* create server configuration */ |
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98 ngx_mail_imap_merge_srv_conf /* merge server configuration */ |
521 | 99 }; |
100 | |
101 | |
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102 ngx_module_t ngx_mail_imap_module = { |
521 | 103 NGX_MODULE_V1, |
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104 &ngx_mail_imap_module_ctx, /* module context */ |
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105 ngx_mail_imap_commands, /* module directives */ |
1136 | 106 NGX_MAIL_MODULE, /* module type */ |
541 | 107 NULL, /* init master */ |
521 | 108 NULL, /* init module */ |
541 | 109 NULL, /* init process */ |
110 NULL, /* init thread */ | |
111 NULL, /* exit thread */ | |
112 NULL, /* exit process */ | |
113 NULL, /* exit master */ | |
114 NGX_MODULE_V1_PADDING | |
521 | 115 }; |
116 | |
117 | |
118 static void * | |
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119 ngx_mail_imap_create_srv_conf(ngx_conf_t *cf) |
577 | 120 { |
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121 ngx_mail_imap_srv_conf_t *iscf; |
641 | 122 |
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123 iscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_imap_srv_conf_t)); |
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124 if (iscf == NULL) { |
527 | 125 return NULL; |
521 | 126 } |
127 | |
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128 iscf->client_buffer_size = NGX_CONF_UNSET_SIZE; |
521 | 129 |
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130 if (ngx_array_init(&iscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
1136 | 131 != NGX_OK) |
132 { | |
133 return NULL; | |
134 } | |
135 | |
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136 return iscf; |
521 | 137 } |
138 | |
139 | |
140 static char * | |
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141 ngx_mail_imap_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
521 | 142 { |
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143 ngx_mail_imap_srv_conf_t *prev = parent; |
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144 ngx_mail_imap_srv_conf_t *conf = child; |
521 | 145 |
1322 | 146 u_char *p, *auth; |
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147 size_t size; |
527 | 148 ngx_str_t *c, *d; |
1136 | 149 ngx_uint_t i, m; |
527 | 150 |
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151 ngx_conf_merge_size_value(conf->client_buffer_size, |
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152 prev->client_buffer_size, |
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153 (size_t) ngx_pagesize); |
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154 |
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155 ngx_conf_merge_bitmask_value(conf->auth_methods, |
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156 prev->auth_methods, |
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157 (NGX_CONF_BITMASK_SET |
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158 |NGX_MAIL_AUTH_PLAIN_ENABLED)); |
1323 | 159 |
800 | 160 |
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161 if (conf->capabilities.nelts == 0) { |
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162 conf->capabilities = prev->capabilities; |
527 | 163 } |
164 | |
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165 if (conf->capabilities.nelts == 0) { |
527 | 166 |
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167 for (d = ngx_mail_imap_default_capabilities; d->len; d++) { |
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168 c = ngx_array_push(&conf->capabilities); |
527 | 169 if (c == NULL) { |
170 return NGX_CONF_ERROR; | |
171 } | |
172 | |
173 *c = *d; | |
174 } | |
175 } | |
176 | |
1136 | 177 size = sizeof("* CAPABILITY" CRLF) - 1; |
527 | 178 |
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179 c = conf->capabilities.elts; |
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180 for (i = 0; i < conf->capabilities.nelts; i++) { |
527 | 181 size += 1 + c[i].len; |
182 } | |
183 | |
1323 | 184 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
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185 m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
1323 | 186 m <<= 1, i++) |
187 { | |
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188 if (m & conf->auth_methods) { |
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189 size += 1 + ngx_mail_imap_auth_methods_names[i].len; |
1323 | 190 } |
191 } | |
192 | |
2049 | 193 p = ngx_pnalloc(cf->pool, size); |
583 | 194 if (p == NULL) { |
195 return NGX_CONF_ERROR; | |
196 } | |
197 | |
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198 conf->capability.len = size; |
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199 conf->capability.data = p; |
583 | 200 |
201 p = ngx_cpymem(p, "* CAPABILITY", sizeof("* CAPABILITY") - 1); | |
202 | |
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203 for (i = 0; i < conf->capabilities.nelts; i++) { |
583 | 204 *p++ = ' '; |
205 p = ngx_cpymem(p, c[i].data, c[i].len); | |
206 } | |
207 | |
1323 | 208 auth = p; |
209 | |
210 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; | |
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211 m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
1323 | 212 m <<= 1, i++) |
213 { | |
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214 if (m & conf->auth_methods) { |
1323 | 215 *p++ = ' '; |
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216 p = ngx_cpymem(p, ngx_mail_imap_auth_methods_names[i].data, |
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217 ngx_mail_imap_auth_methods_names[i].len); |
1323 | 218 } |
219 } | |
220 | |
583 | 221 *p++ = CR; *p = LF; |
222 | |
223 | |
224 size += sizeof(" STARTTLS") - 1; | |
225 | |
2049 | 226 p = ngx_pnalloc(cf->pool, size); |
583 | 227 if (p == NULL) { |
527 | 228 return NGX_CONF_ERROR; |
229 } | |
230 | |
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231 conf->starttls_capability.len = size; |
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232 conf->starttls_capability.data = p; |
527 | 233 |
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234 p = ngx_cpymem(p, conf->capability.data, |
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235 conf->capability.len - (sizeof(CRLF) - 1)); |
583 | 236 p = ngx_cpymem(p, " STARTTLS", sizeof(" STARTTLS") - 1); |
237 *p++ = CR; *p = LF; | |
238 | |
239 | |
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240 size = (auth - conf->capability.data) + sizeof(CRLF) - 1 |
1323 | 241 + sizeof(" STARTTLS LOGINDISABLED") - 1; |
583 | 242 |
2049 | 243 p = ngx_pnalloc(cf->pool, size); |
583 | 244 if (p == NULL) { |
245 return NGX_CONF_ERROR; | |
527 | 246 } |
247 | |
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248 conf->starttls_only_capability.len = size; |
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249 conf->starttls_only_capability.data = p; |
527 | 250 |
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251 p = ngx_cpymem(p, conf->capability.data, |
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252 auth - conf->capability.data); |
1323 | 253 p = ngx_cpymem(p, " STARTTLS LOGINDISABLED", |
254 sizeof(" STARTTLS LOGINDISABLED") - 1); | |
583 | 255 *p++ = CR; *p = LF; |
256 | |
521 | 257 return NGX_CONF_OK; |
258 } |