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76
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_event_connect.h>
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11 #include <ngx_imap.h>
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12
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13
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14 typedef struct {
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15 ngx_flag_t enable;
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88
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16 size_t buffer_size;
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17 ngx_msec_t timeout;
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76
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18 } ngx_imap_proxy_conf_t;
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19
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20
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21 static void ngx_imap_proxy_block_read(ngx_event_t *rev);
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22 static void ngx_imap_proxy_imap_handler(ngx_event_t *rev);
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23 static void ngx_imap_proxy_pop3_handler(ngx_event_t *rev);
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24 static void ngx_imap_proxy_dummy_handler(ngx_event_t *ev);
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25 static ngx_int_t ngx_imap_proxy_read_response(ngx_imap_session_t *s,
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26 ngx_uint_t what);
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27 static void ngx_imap_proxy_handler(ngx_event_t *ev);
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28 static void ngx_imap_proxy_internal_server_error(ngx_imap_session_t *s);
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29 static void ngx_imap_proxy_close_session(ngx_imap_session_t *s);
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30 static void *ngx_imap_proxy_create_conf(ngx_conf_t *cf);
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31 static char *ngx_imap_proxy_merge_conf(ngx_conf_t *cf, void *parent,
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32 void *child);
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33
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34
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35 #define NGX_IMAP_WAIT_OK 0
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36 #define NGX_IMAP_WAIT_NEXT 1
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37
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38
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39 static ngx_command_t ngx_imap_proxy_commands[] = {
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88
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40
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76
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41 { ngx_string("proxy"),
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42 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_FLAG,
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43 ngx_conf_set_flag_slot,
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44 NGX_IMAP_SRV_CONF_OFFSET,
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45 offsetof(ngx_imap_proxy_conf_t, enable),
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46 NULL },
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47
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88
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48 { ngx_string("proxy_buffer"),
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49 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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50 ngx_conf_set_size_slot,
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51 NGX_IMAP_SRV_CONF_OFFSET,
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52 offsetof(ngx_imap_proxy_conf_t, buffer_size),
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53 NULL },
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54
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55 { ngx_string("proxy_timeout"),
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56 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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57 ngx_conf_set_msec_slot,
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58 NGX_IMAP_SRV_CONF_OFFSET,
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59 offsetof(ngx_imap_proxy_conf_t, timeout),
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60 NULL },
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61
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76
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62 ngx_null_command
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63 };
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64
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65
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66 static ngx_imap_module_t ngx_imap_proxy_module_ctx = {
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67 NULL, /* create main configuration */
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68 NULL, /* init main configuration */
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69
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70 ngx_imap_proxy_create_conf, /* create server configuration */
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71 ngx_imap_proxy_merge_conf /* merge server configuration */
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72 };
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73
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74
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75 ngx_module_t ngx_imap_proxy_module = {
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76 NGX_MODULE_V1,
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77 &ngx_imap_proxy_module_ctx, /* module context */
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78 ngx_imap_proxy_commands, /* module directives */
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79 NGX_IMAP_MODULE, /* module type */
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90
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80 NULL, /* init master */
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76
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81 NULL, /* init module */
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90
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82 NULL, /* init process */
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83 NULL, /* init thread */
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84 NULL, /* exit thread */
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85 NULL, /* exit process */
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86 NULL, /* exit master */
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87 NGX_MODULE_V1_PADDING
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76
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88 };
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89
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90
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91 void
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92 ngx_imap_proxy_init(ngx_imap_session_t *s, ngx_peers_t *peers)
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93 {
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94 ngx_int_t rc;
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95 ngx_imap_proxy_ctx_t *p;
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96 ngx_imap_core_srv_conf_t *cscf;
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97
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98 p = ngx_pcalloc(s->connection->pool, sizeof(ngx_imap_proxy_ctx_t));
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99 if (p == NULL) {
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100 ngx_imap_session_internal_server_error(s);
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101 return;
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102 }
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103
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104 s->proxy = p;
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105
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106 p->upstream.peers = peers;
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107 p->upstream.log = s->connection->log;
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108 p->upstream.log_error = NGX_ERROR_ERR;
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109
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90
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110 s->connection->log->action = "in upstream auth state";
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111
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76
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112 rc = ngx_event_connect_peer(&p->upstream);
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113
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92
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114 if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
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115 ngx_imap_proxy_internal_server_error(s);
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76
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116 return;
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117 }
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118
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119 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
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120 ngx_add_timer(p->upstream.connection->read, cscf->timeout);
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121
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122 p->upstream.connection->data = s;
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123 p->upstream.connection->pool = s->connection->pool;
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124
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125 s->connection->read->handler = ngx_imap_proxy_block_read;
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126 p->upstream.connection->write->handler = ngx_imap_proxy_dummy_handler;
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127
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128 if (s->protocol == NGX_IMAP_POP3_PROTOCOL) {
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129 p->upstream.connection->read->handler = ngx_imap_proxy_pop3_handler;
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130 s->imap_state = ngx_pop3_start;
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131
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132 } else {
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133 p->upstream.connection->read->handler = ngx_imap_proxy_imap_handler;
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134 s->imap_state = ngx_imap_start;
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135 }
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136 }
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137
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138
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139 static void
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140 ngx_imap_proxy_block_read(ngx_event_t *rev)
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141 {
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142 ngx_connection_t *c;
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143 ngx_imap_session_t *s;
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144
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145 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy block read");
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146
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147 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
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148 c = rev->data;
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149 s = c->data;
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150
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151 ngx_imap_proxy_close_session(s);
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152 }
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153 }
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154
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155
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156 static void
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157 ngx_imap_proxy_imap_handler(ngx_event_t *rev)
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158 {
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96
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159 char *action;
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88
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160 u_char *p;
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161 ngx_int_t rc;
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162 ngx_str_t line;
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163 ngx_connection_t *c;
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164 ngx_imap_session_t *s;
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165 ngx_imap_proxy_conf_t *pcf;
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76
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166
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167 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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168 "imap proxy imap auth handler");
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169
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170 c = rev->data;
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171 s = c->data;
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172
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173 if (rev->timedout) {
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174 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
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175 "upstream timed out");
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176 ngx_imap_proxy_internal_server_error(s);
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177 return;
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178 }
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179
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180 if (s->proxy->buffer == NULL) {
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88
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181 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
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182
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88
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183 s->proxy->buffer = ngx_create_temp_buf(c->pool, pcf->buffer_size);
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76
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184 if (s->proxy->buffer == NULL) {
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185 ngx_imap_proxy_internal_server_error(s);
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186 return;
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187 }
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188 }
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189
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190 rc = ngx_imap_proxy_read_response(s, s->imap_state == ngx_imap_start ?
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191 NGX_IMAP_WAIT_OK : NGX_IMAP_WAIT_NEXT);
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192
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193 if (rc == NGX_AGAIN) {
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194 return;
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195 }
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196
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78
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197 if (rc == NGX_ERROR || rc == NGX_IMAP_PROXY_INVALID) {
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76
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198 ngx_imap_proxy_internal_server_error(s);
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199 return;
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200 }
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201
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78
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202 if (rc == NGX_IMAP_PROXY_ERROR) {
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203 s->connection->read->handler = ngx_imap_proxy_handler;
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204 s->connection->write->handler = ngx_imap_proxy_handler;
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205 rev->handler = ngx_imap_proxy_handler;
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206 c->write->handler = ngx_imap_proxy_handler;
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207
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208 ngx_imap_proxy_handler(c->read);
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209 return;
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210 }
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211
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76
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212 switch (s->imap_state) {
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213
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214 case ngx_imap_start:
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215 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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216 "imap proxy send login");
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217
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218 line.len = s->tag.len + sizeof("LOGIN ") - 1
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219 + 1 + NGX_SIZE_T_LEN + 1 + 2;
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220 line.data = ngx_palloc(c->pool, line.len);
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221 if (line.data == NULL) {
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222 ngx_imap_proxy_internal_server_error(s);
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223 return;
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224 }
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225
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226 line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF,
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227 &s->tag, s->login.len)
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228 - line.data;
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229
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230 s->imap_state = ngx_imap_login;
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231 break;
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232
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233 case ngx_imap_login:
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234 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy send user");
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235
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78
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236 line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2;
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76
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237 line.data = ngx_palloc(c->pool, line.len);
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238 if (line.data == NULL) {
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239 ngx_imap_proxy_internal_server_error(s);
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240 return;
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241 }
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242
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78
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243 line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF,
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244 &s->login, s->passwd.len)
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245 - line.data;
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246
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247 s->imap_state = ngx_imap_user;
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248 break;
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249
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250 case ngx_imap_user:
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251 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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252 "imap proxy send passwd");
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253
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254 line.len = s->passwd.len + 2;
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255 line.data = ngx_palloc(c->pool, line.len);
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256 if (line.data == NULL) {
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257 ngx_imap_proxy_internal_server_error(s);
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258 return;
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259 }
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260
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261 p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len);
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262 *p++ = CR; *p = LF;
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263
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264 s->imap_state = ngx_imap_passwd;
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265 break;
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266
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267 default:
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268 #if (NGX_SUPPRESS_WARN)
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269 line.len = 0;
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270 line.data = NULL;
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271 #endif
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272 break;
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273 }
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274
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88
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275 if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
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76
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276 /*
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277 * we treat the incomplete sending as NGX_ERROR
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278 * because it is very strange here
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279 */
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280 ngx_imap_proxy_internal_server_error(s);
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281 return;
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282 }
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283
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284 s->proxy->buffer->pos = s->proxy->buffer->start;
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285 s->proxy->buffer->last = s->proxy->buffer->start;
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286
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287 if (s->imap_state == ngx_imap_passwd) {
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288 s->connection->read->handler = ngx_imap_proxy_handler;
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289 s->connection->write->handler = ngx_imap_proxy_handler;
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290 rev->handler = ngx_imap_proxy_handler;
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291 c->write->handler = ngx_imap_proxy_handler;
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80
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292
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88
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293 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
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294 ngx_add_timer(s->connection->read, pcf->timeout);
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80
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295 ngx_del_timer(c->read);
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90
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296
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96
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297 action = c->log->action;
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298 c->log->action = NULL;
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299 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
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300 c->log->action = action;
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301
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90
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302 c->log->action = "proxying";
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76
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303 }
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304 }
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305
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306
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307 static void
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308 ngx_imap_proxy_pop3_handler(ngx_event_t *rev)
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309 {
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96
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310 char *action;
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88
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311 u_char *p;
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312 ngx_int_t rc;
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313 ngx_str_t line;
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314 ngx_connection_t *c;
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315 ngx_imap_session_t *s;
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316 ngx_imap_proxy_conf_t *pcf;
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76
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317
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318 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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319 "imap proxy pop3 auth handler");
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320
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321 c = rev->data;
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322 s = c->data;
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323
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324 if (rev->timedout) {
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325 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
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326 "upstream timed out");
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327 ngx_imap_proxy_internal_server_error(s);
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328 return;
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329 }
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330
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331 if (s->proxy->buffer == NULL) {
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88
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332 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
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76
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333
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88
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334 s->proxy->buffer = ngx_create_temp_buf(c->pool, pcf->buffer_size);
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76
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335 if (s->proxy->buffer == NULL) {
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336 ngx_imap_proxy_internal_server_error(s);
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337 return;
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338 }
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339 }
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340
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341 rc = ngx_imap_proxy_read_response(s, NGX_IMAP_WAIT_OK);
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342
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343 if (rc == NGX_AGAIN) {
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344 return;
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345 }
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346
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78
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347 if (rc == NGX_ERROR || rc == NGX_IMAP_PROXY_INVALID) {
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76
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348 ngx_imap_proxy_internal_server_error(s);
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349 return;
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350 }
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351
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78
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352 if (rc == NGX_IMAP_PROXY_ERROR) {
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353 s->connection->read->handler = ngx_imap_proxy_handler;
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354 s->connection->write->handler = ngx_imap_proxy_handler;
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355 rev->handler = ngx_imap_proxy_handler;
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356 c->write->handler = ngx_imap_proxy_handler;
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357
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358 ngx_imap_proxy_handler(c->read);
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359 return;
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360 }
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361
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76
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362 switch (s->imap_state) {
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363
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364 case ngx_pop3_start:
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365 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy send user");
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366
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367 line.len = sizeof("USER ") - 1 + s->login.len + 2;
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368 line.data = ngx_palloc(c->pool, line.len);
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369 if (line.data == NULL) {
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370 ngx_imap_proxy_internal_server_error(s);
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371 return;
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372 }
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373
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374 p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1);
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375 p = ngx_cpymem(p, s->login.data, s->login.len);
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376 *p++ = CR; *p = LF;
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377
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378 s->imap_state = ngx_pop3_user;
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379 break;
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380
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381 case ngx_pop3_user:
|
|
|
382 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy send pass");
|
|
|
383
|
|
|
384 line.len = sizeof("PASS ") - 1 + s->passwd.len + 2;
|
|
|
385 line.data = ngx_palloc(c->pool, line.len);
|
|
|
386 if (line.data == NULL) {
|
|
|
387 ngx_imap_proxy_internal_server_error(s);
|
|
|
388 return;
|
|
|
389 }
|
|
|
390
|
|
|
391 p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1);
|
|
|
392 p = ngx_cpymem(p, s->passwd.data, s->passwd.len);
|
|
|
393 *p++ = CR; *p = LF;
|
|
|
394
|
|
|
395 s->imap_state = ngx_pop3_passwd;
|
|
|
396 break;
|
|
|
397
|
|
|
398 default:
|
|
|
399 #if (NGX_SUPPRESS_WARN)
|
|
|
400 line.len = 0;
|
|
|
401 line.data = NULL;
|
|
|
402 #endif
|
|
|
403 break;
|
|
|
404 }
|
|
|
405
|
|
88
|
406 if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
|
|
76
|
407 /*
|
|
|
408 * we treat the incomplete sending as NGX_ERROR
|
|
|
409 * because it is very strange here
|
|
|
410 */
|
|
|
411 ngx_imap_proxy_internal_server_error(s);
|
|
|
412 return;
|
|
|
413 }
|
|
|
414
|
|
|
415 s->proxy->buffer->pos = s->proxy->buffer->start;
|
|
|
416 s->proxy->buffer->last = s->proxy->buffer->start;
|
|
|
417
|
|
|
418 if (s->imap_state == ngx_pop3_passwd) {
|
|
|
419 s->connection->read->handler = ngx_imap_proxy_handler;
|
|
|
420 s->connection->write->handler = ngx_imap_proxy_handler;
|
|
|
421 rev->handler = ngx_imap_proxy_handler;
|
|
|
422 c->write->handler = ngx_imap_proxy_handler;
|
|
80
|
423
|
|
88
|
424 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
|
|
|
425 ngx_add_timer(s->connection->read, pcf->timeout);
|
|
80
|
426 ngx_del_timer(c->read);
|
|
90
|
427
|
|
96
|
428 action = c->log->action;
|
|
|
429 c->log->action = NULL;
|
|
|
430 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
|
|
|
431 c->log->action = action;
|
|
|
432
|
|
90
|
433 c->log->action = "proxying";
|
|
76
|
434 }
|
|
|
435 }
|
|
|
436
|
|
|
437
|
|
|
438 static void
|
|
|
439 ngx_imap_proxy_dummy_handler(ngx_event_t *ev)
|
|
|
440 {
|
|
|
441 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, ev->log, 0, "imap proxy dummy handler");
|
|
|
442 }
|
|
|
443
|
|
|
444
|
|
|
445 static ngx_int_t
|
|
|
446 ngx_imap_proxy_read_response(ngx_imap_session_t *s, ngx_uint_t what)
|
|
|
447 {
|
|
|
448 u_char *p;
|
|
|
449 ssize_t n;
|
|
|
450 ngx_buf_t *b;
|
|
|
451
|
|
|
452 b = s->proxy->buffer;
|
|
|
453
|
|
88
|
454 n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection,
|
|
|
455 b->last, b->end - b->last);
|
|
76
|
456
|
|
|
457 if (n == NGX_ERROR || n == 0) {
|
|
|
458 return NGX_ERROR;
|
|
|
459 }
|
|
|
460
|
|
|
461 if (n == NGX_AGAIN) {
|
|
|
462 return NGX_AGAIN;
|
|
|
463 }
|
|
|
464
|
|
|
465 b->last += n;
|
|
|
466
|
|
|
467 if (b->last - b->pos < 5) {
|
|
|
468 return NGX_AGAIN;
|
|
|
469 }
|
|
|
470
|
|
|
471 if (*(b->last - 2) != CR || *(b->last - 1) != LF) {
|
|
|
472 if (b->last == b->end) {
|
|
|
473 *(b->last - 1) = '\0';
|
|
|
474 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
|
|
|
475 "upstream sent too long response line: \"%s\"",
|
|
|
476 b->pos);
|
|
|
477 return NGX_IMAP_PROXY_INVALID;
|
|
|
478 }
|
|
|
479
|
|
|
480 return NGX_AGAIN;
|
|
|
481 }
|
|
|
482
|
|
|
483 p = b->pos;
|
|
|
484
|
|
|
485 if (s->protocol == NGX_IMAP_POP3_PROTOCOL) {
|
|
|
486 if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') {
|
|
|
487 return NGX_OK;
|
|
|
488 }
|
|
|
489
|
|
|
490 if (p[0] == '-' && p[1] == 'E' && p[2] == 'R' && p[3] == 'R') {
|
|
|
491 return NGX_IMAP_PROXY_ERROR;
|
|
|
492 }
|
|
|
493
|
|
|
494 } else {
|
|
78
|
495 if (p[0] == 'N' && p[1] == 'O') {
|
|
|
496 return NGX_IMAP_PROXY_ERROR;
|
|
|
497 }
|
|
|
498
|
|
76
|
499 if (what == NGX_IMAP_WAIT_OK) {
|
|
|
500 if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') {
|
|
|
501 return NGX_OK;
|
|
|
502 }
|
|
|
503
|
|
|
504 } else {
|
|
78
|
505 if (p[0] == '+') {
|
|
76
|
506 return NGX_OK;
|
|
|
507 }
|
|
|
508 }
|
|
|
509 }
|
|
|
510
|
|
|
511 *(b->last - 2) = '\0';
|
|
|
512 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
|
|
|
513 "upstream sent invalid response: \"%s\"", p);
|
|
|
514
|
|
|
515 return NGX_IMAP_PROXY_INVALID;
|
|
|
516 }
|
|
|
517
|
|
|
518
|
|
|
519 static void
|
|
|
520 ngx_imap_proxy_handler(ngx_event_t *ev)
|
|
|
521 {
|
|
96
|
522 char *action;
|
|
88
|
523 size_t size;
|
|
|
524 ssize_t n;
|
|
|
525 ngx_buf_t *b;
|
|
|
526 ngx_uint_t again, do_write;
|
|
|
527 ngx_connection_t *c, *src, *dst;
|
|
|
528 ngx_imap_session_t *s;
|
|
|
529 ngx_imap_proxy_conf_t *pcf;
|
|
76
|
530
|
|
|
531 c = ev->data;
|
|
|
532 s = c->data;
|
|
|
533
|
|
|
534 if (ev->timedout) {
|
|
|
535 if (c == s->connection) {
|
|
|
536 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
|
|
|
537 "client timed out");
|
|
|
538 } else {
|
|
|
539 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
|
|
|
540 "upstream timed out");
|
|
|
541 }
|
|
|
542
|
|
|
543 ngx_imap_proxy_close_session(s);
|
|
|
544 return;
|
|
|
545 }
|
|
|
546
|
|
|
547 if (c == s->connection) {
|
|
|
548 if (ev->write) {
|
|
|
549 src = s->proxy->upstream.connection;
|
|
|
550 dst = c;
|
|
|
551 b = s->proxy->buffer;
|
|
|
552
|
|
|
553 } else {
|
|
|
554 src = c;
|
|
|
555 dst = s->proxy->upstream.connection;
|
|
|
556 b = s->buffer;
|
|
|
557 }
|
|
|
558
|
|
|
559 } else {
|
|
|
560 if (ev->write) {
|
|
|
561 src = s->connection;
|
|
|
562 dst = c;
|
|
|
563 b = s->buffer;
|
|
|
564
|
|
|
565 } else {
|
|
|
566 src = c;
|
|
|
567 dst = s->connection;
|
|
|
568 b = s->proxy->buffer;
|
|
|
569 }
|
|
|
570 }
|
|
|
571
|
|
|
572 do_write = ev->write ? 1 : 0;
|
|
|
573
|
|
|
574 ngx_log_debug3(NGX_LOG_DEBUG_IMAP, ev->log, 0,
|
|
|
575 "imap proxy handler: %d, #%d > #%d",
|
|
|
576 do_write, src->fd, dst->fd);
|
|
|
577
|
|
|
578 do {
|
|
|
579 again = 0;
|
|
|
580
|
|
|
581 if (do_write == 1) {
|
|
|
582
|
|
|
583 size = b->last - b->pos;
|
|
|
584
|
|
|
585 if (size && dst->write->ready) {
|
|
88
|
586 n = dst->send(dst, b->pos, size);
|
|
76
|
587
|
|
|
588 if (n == NGX_ERROR) {
|
|
|
589 ngx_imap_proxy_close_session(s);
|
|
|
590 return;
|
|
|
591 }
|
|
|
592
|
|
|
593 if (n > 0) {
|
|
|
594 again = 1;
|
|
|
595 b->pos += n;
|
|
|
596
|
|
|
597 if (b->pos == b->last) {
|
|
|
598 b->pos = b->start;
|
|
|
599 b->last = b->start;
|
|
|
600 }
|
|
|
601 }
|
|
|
602
|
|
|
603 if (n == NGX_AGAIN || n < (ssize_t) size) {
|
|
|
604 if (ngx_handle_write_event(dst->write, /* TODO: LOWAT */ 0)
|
|
78
|
605 == NGX_ERROR)
|
|
76
|
606 {
|
|
|
607 ngx_imap_proxy_close_session(s);
|
|
|
608 return;
|
|
|
609 }
|
|
|
610 }
|
|
|
611 }
|
|
|
612 }
|
|
|
613
|
|
|
614 size = b->end - b->last;
|
|
|
615
|
|
|
616 if (size && src->read->ready) {
|
|
88
|
617 n = src->recv(src, b->last, size);
|
|
76
|
618
|
|
96
|
619 if (n == NGX_ERROR) {
|
|
|
620 ngx_imap_proxy_close_session(s);
|
|
|
621 return;
|
|
|
622 }
|
|
|
623
|
|
|
624 if (n == 0) {
|
|
|
625 action = c->log->action;
|
|
|
626 c->log->action = NULL;
|
|
|
627 ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done");
|
|
|
628 c->log->action = action;
|
|
|
629
|
|
76
|
630 ngx_imap_proxy_close_session(s);
|
|
|
631 return;
|
|
|
632 }
|
|
|
633
|
|
|
634 if (n > 0) {
|
|
|
635 again = 1;
|
|
|
636 do_write = 1;
|
|
|
637 b->last += n;
|
|
|
638 }
|
|
|
639
|
|
|
640 if (n == NGX_AGAIN || n < (ssize_t) size) {
|
|
|
641 if (ngx_handle_read_event(src->read, 0) == NGX_ERROR) {
|
|
|
642 ngx_imap_proxy_close_session(s);
|
|
|
643 return;
|
|
|
644 }
|
|
|
645 }
|
|
88
|
646
|
|
|
647 if (c == s->connection) {
|
|
|
648 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
|
|
|
649 ngx_add_timer(c->read, pcf->timeout);
|
|
|
650 }
|
|
76
|
651 }
|
|
|
652
|
|
|
653 } while (again);
|
|
|
654 }
|
|
|
655
|
|
|
656
|
|
|
657 static void
|
|
|
658 ngx_imap_proxy_internal_server_error(ngx_imap_session_t *s)
|
|
|
659 {
|
|
|
660 if (s->proxy->upstream.connection) {
|
|
|
661 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, s->connection->log, 0,
|
|
|
662 "close imap proxy connection: %d",
|
|
|
663 s->proxy->upstream.connection->fd);
|
|
|
664
|
|
|
665 ngx_close_connection(s->proxy->upstream.connection);
|
|
|
666 }
|
|
|
667
|
|
|
668 ngx_imap_session_internal_server_error(s);
|
|
|
669 }
|
|
|
670
|
|
|
671
|
|
|
672 static void
|
|
|
673 ngx_imap_proxy_close_session(ngx_imap_session_t *s)
|
|
|
674 {
|
|
|
675 if (s->proxy->upstream.connection) {
|
|
|
676 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, s->connection->log, 0,
|
|
|
677 "close imap proxy connection: %d",
|
|
|
678 s->proxy->upstream.connection->fd);
|
|
|
679
|
|
|
680 ngx_close_connection(s->proxy->upstream.connection);
|
|
|
681 }
|
|
|
682
|
|
|
683 ngx_imap_close_connection(s->connection);
|
|
|
684 }
|
|
|
685
|
|
|
686
|
|
|
687 static void *
|
|
|
688 ngx_imap_proxy_create_conf(ngx_conf_t *cf)
|
|
|
689 {
|
|
|
690 ngx_imap_proxy_conf_t *pcf;
|
|
|
691
|
|
|
692 pcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_proxy_conf_t));
|
|
|
693 if (pcf == NULL) {
|
|
|
694 return NGX_CONF_ERROR;
|
|
|
695 }
|
|
|
696
|
|
|
697 pcf->enable = NGX_CONF_UNSET;
|
|
88
|
698 pcf->buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
699 pcf->timeout = NGX_CONF_UNSET_MSEC;
|
|
76
|
700
|
|
|
701 return pcf;
|
|
|
702 }
|
|
|
703
|
|
|
704
|
|
|
705 static char *
|
|
|
706 ngx_imap_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
707 {
|
|
|
708 ngx_imap_proxy_conf_t *prev = parent;
|
|
|
709 ngx_imap_proxy_conf_t *conf = child;
|
|
|
710
|
|
88
|
711 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
712 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
|
|
|
713 (size_t) ngx_pagesize);
|
|
|
714 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000);
|
|
76
|
715
|
|
|
716 return NGX_CONF_OK;
|
|
|
717 }
|
