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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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212
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26 ngx_uint_t state);
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76
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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 static ngx_command_t ngx_imap_proxy_commands[] = {
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88
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36
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76
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37 { ngx_string("proxy"),
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38 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_FLAG,
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39 ngx_conf_set_flag_slot,
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40 NGX_IMAP_SRV_CONF_OFFSET,
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41 offsetof(ngx_imap_proxy_conf_t, enable),
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42 NULL },
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43
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88
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44 { ngx_string("proxy_buffer"),
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45 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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46 ngx_conf_set_size_slot,
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47 NGX_IMAP_SRV_CONF_OFFSET,
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48 offsetof(ngx_imap_proxy_conf_t, buffer_size),
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49 NULL },
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50
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51 { ngx_string("proxy_timeout"),
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52 NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
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53 ngx_conf_set_msec_slot,
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54 NGX_IMAP_SRV_CONF_OFFSET,
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55 offsetof(ngx_imap_proxy_conf_t, timeout),
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56 NULL },
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57
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76
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58 ngx_null_command
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59 };
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60
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61
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62 static ngx_imap_module_t ngx_imap_proxy_module_ctx = {
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63 NULL, /* create main configuration */
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64 NULL, /* init main configuration */
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65
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66 ngx_imap_proxy_create_conf, /* create server configuration */
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67 ngx_imap_proxy_merge_conf /* merge server configuration */
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68 };
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69
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70
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71 ngx_module_t ngx_imap_proxy_module = {
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72 NGX_MODULE_V1,
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73 &ngx_imap_proxy_module_ctx, /* module context */
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74 ngx_imap_proxy_commands, /* module directives */
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75 NGX_IMAP_MODULE, /* module type */
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90
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76 NULL, /* init master */
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76
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77 NULL, /* init module */
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90
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78 NULL, /* init process */
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79 NULL, /* init thread */
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80 NULL, /* exit thread */
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81 NULL, /* exit process */
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82 NULL, /* exit master */
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83 NGX_MODULE_V1_PADDING
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76
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84 };
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85
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86
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87 void
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88 ngx_imap_proxy_init(ngx_imap_session_t *s, ngx_peers_t *peers)
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89 {
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136
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90 int keepalive;
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76
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91 ngx_int_t rc;
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92 ngx_imap_proxy_ctx_t *p;
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93 ngx_imap_core_srv_conf_t *cscf;
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94
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136
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95 s->connection->log->action = "connecting to upstream";
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96
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97 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
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98
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99 if (cscf->so_keepalive) {
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100 keepalive = 1;
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101
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102 if (setsockopt(s->connection->fd, SOL_SOCKET, SO_KEEPALIVE,
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103 (const void *) &keepalive, sizeof(int))
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104 == -1)
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105 {
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106 ngx_log_error(NGX_LOG_ALERT, s->connection->log, ngx_socket_errno,
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107 "setsockopt(SO_KEEPALIVE) failed");
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108 }
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109 }
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110
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76
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111 p = ngx_pcalloc(s->connection->pool, sizeof(ngx_imap_proxy_ctx_t));
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112 if (p == NULL) {
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113 ngx_imap_session_internal_server_error(s);
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114 return;
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115 }
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116
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117 s->proxy = p;
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118
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119 p->upstream.peers = peers;
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120 p->upstream.log = s->connection->log;
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121 p->upstream.log_error = NGX_ERROR_ERR;
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122
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123 rc = ngx_event_connect_peer(&p->upstream);
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124
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92
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125 if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
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126 ngx_imap_proxy_internal_server_error(s);
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76
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127 return;
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128 }
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129
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130 ngx_add_timer(p->upstream.connection->read, cscf->timeout);
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131
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132 p->upstream.connection->data = s;
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133 p->upstream.connection->pool = s->connection->pool;
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134
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135 s->connection->read->handler = ngx_imap_proxy_block_read;
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136 p->upstream.connection->write->handler = ngx_imap_proxy_dummy_handler;
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137
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138 if (s->protocol == NGX_IMAP_POP3_PROTOCOL) {
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139 p->upstream.connection->read->handler = ngx_imap_proxy_pop3_handler;
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140 s->imap_state = ngx_pop3_start;
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141
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142 } else {
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143 p->upstream.connection->read->handler = ngx_imap_proxy_imap_handler;
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144 s->imap_state = ngx_imap_start;
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145 }
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146 }
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147
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148
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149 static void
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150 ngx_imap_proxy_block_read(ngx_event_t *rev)
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151 {
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152 ngx_connection_t *c;
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153 ngx_imap_session_t *s;
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154
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155 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy block read");
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156
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157 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
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158 c = rev->data;
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159 s = c->data;
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160
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161 ngx_imap_proxy_close_session(s);
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162 }
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163 }
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164
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165
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166 static void
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167 ngx_imap_proxy_imap_handler(ngx_event_t *rev)
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168 {
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88
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169 u_char *p;
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170 ngx_int_t rc;
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171 ngx_str_t line;
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172 ngx_connection_t *c;
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173 ngx_imap_session_t *s;
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174 ngx_imap_proxy_conf_t *pcf;
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76
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175
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176 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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177 "imap proxy imap auth handler");
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178
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179 c = rev->data;
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180 s = c->data;
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181
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182 if (rev->timedout) {
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183 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
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184 "upstream timed out");
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126
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185 c->timedout = 1;
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76
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186 ngx_imap_proxy_internal_server_error(s);
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187 return;
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188 }
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189
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190 if (s->proxy->buffer == NULL) {
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88
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191 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
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76
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192
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88
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193 s->proxy->buffer = ngx_create_temp_buf(c->pool, pcf->buffer_size);
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76
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194 if (s->proxy->buffer == NULL) {
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195 ngx_imap_proxy_internal_server_error(s);
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196 return;
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197 }
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198 }
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199
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212
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200 rc = ngx_imap_proxy_read_response(s, s->imap_state);
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76
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201
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202 if (rc == NGX_AGAIN) {
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203 return;
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204 }
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205
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120
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206 if (rc == NGX_ERROR) {
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76
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207 ngx_imap_proxy_internal_server_error(s);
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208 return;
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209 }
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210
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211 switch (s->imap_state) {
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212
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213 case ngx_imap_start:
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214 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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215 "imap proxy send login");
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216
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136
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217 s->connection->log->action = "sending LOGIN command to upstream";
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218
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76
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219 line.len = s->tag.len + sizeof("LOGIN ") - 1
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220 + 1 + NGX_SIZE_T_LEN + 1 + 2;
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221 line.data = ngx_palloc(c->pool, line.len);
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222 if (line.data == NULL) {
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223 ngx_imap_proxy_internal_server_error(s);
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224 return;
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225 }
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226
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227 line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF,
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228 &s->tag, s->login.len)
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229 - line.data;
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230
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231 s->imap_state = ngx_imap_login;
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232 break;
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233
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234 case ngx_imap_login:
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235 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy send user");
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236
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136
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237 s->connection->log->action = "sending user name to upstream";
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238
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78
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239 line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2;
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76
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240 line.data = ngx_palloc(c->pool, line.len);
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241 if (line.data == NULL) {
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242 ngx_imap_proxy_internal_server_error(s);
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243 return;
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244 }
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245
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78
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246 line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF,
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76
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247 &s->login, s->passwd.len)
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248 - line.data;
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249
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250 s->imap_state = ngx_imap_user;
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251 break;
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252
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253 case ngx_imap_user:
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254 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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255 "imap proxy send passwd");
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256
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136
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257 s->connection->log->action = "sending password to upstream";
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258
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76
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259 line.len = s->passwd.len + 2;
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260 line.data = ngx_palloc(c->pool, line.len);
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261 if (line.data == NULL) {
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262 ngx_imap_proxy_internal_server_error(s);
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263 return;
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264 }
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265
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266 p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len);
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267 *p++ = CR; *p = LF;
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268
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269 s->imap_state = ngx_imap_passwd;
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270 break;
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271
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212
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272 case ngx_imap_passwd:
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273 s->connection->read->handler = ngx_imap_proxy_handler;
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274 s->connection->write->handler = ngx_imap_proxy_handler;
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275 rev->handler = ngx_imap_proxy_handler;
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276 c->write->handler = ngx_imap_proxy_handler;
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277
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278 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
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279 ngx_add_timer(s->connection->read, pcf->timeout);
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280 ngx_del_timer(c->read);
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281
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282 c->log->action = NULL;
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283 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
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284
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285 ngx_imap_proxy_handler(s->connection->write);
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286
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287 return;
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288
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76
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289 default:
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290 #if (NGX_SUPPRESS_WARN)
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291 line.len = 0;
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292 line.data = NULL;
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293 #endif
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294 break;
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295 }
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296
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88
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297 if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
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76
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298 /*
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299 * we treat the incomplete sending as NGX_ERROR
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300 * because it is very strange here
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301 */
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302 ngx_imap_proxy_internal_server_error(s);
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303 return;
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304 }
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305
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306 s->proxy->buffer->pos = s->proxy->buffer->start;
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307 s->proxy->buffer->last = s->proxy->buffer->start;
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308 }
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309
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310
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311 static void
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312 ngx_imap_proxy_pop3_handler(ngx_event_t *rev)
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313 {
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88
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314 u_char *p;
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315 ngx_int_t rc;
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316 ngx_str_t line;
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317 ngx_connection_t *c;
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318 ngx_imap_session_t *s;
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319 ngx_imap_proxy_conf_t *pcf;
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76
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320
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321 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0,
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322 "imap proxy pop3 auth handler");
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323
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324 c = rev->data;
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325 s = c->data;
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326
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327 if (rev->timedout) {
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328 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
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329 "upstream timed out");
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126
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330 c->timedout = 1;
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76
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331 ngx_imap_proxy_internal_server_error(s);
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332 return;
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333 }
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334
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335 if (s->proxy->buffer == NULL) {
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88
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336 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
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76
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337
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88
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338 s->proxy->buffer = ngx_create_temp_buf(c->pool, pcf->buffer_size);
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76
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339 if (s->proxy->buffer == NULL) {
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340 ngx_imap_proxy_internal_server_error(s);
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341 return;
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342 }
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343 }
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344
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212
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345 rc = ngx_imap_proxy_read_response(s, 0);
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76
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346
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347 if (rc == NGX_AGAIN) {
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348 return;
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349 }
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350
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120
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351 if (rc == NGX_ERROR) {
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76
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352 ngx_imap_proxy_internal_server_error(s);
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353 return;
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354 }
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355
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356 switch (s->imap_state) {
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357
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358 case ngx_pop3_start:
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359 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy send user");
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360
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136
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361 s->connection->log->action = "sending user name to upstream";
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362
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76
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363 line.len = sizeof("USER ") - 1 + s->login.len + 2;
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364 line.data = ngx_palloc(c->pool, line.len);
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365 if (line.data == NULL) {
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366 ngx_imap_proxy_internal_server_error(s);
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367 return;
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368 }
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369
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370 p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1);
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371 p = ngx_cpymem(p, s->login.data, s->login.len);
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372 *p++ = CR; *p = LF;
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373
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374 s->imap_state = ngx_pop3_user;
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375 break;
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376
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377 case ngx_pop3_user:
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378 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap proxy send pass");
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379
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136
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380 s->connection->log->action = "sending password to upstream";
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381
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76
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382 line.len = sizeof("PASS ") - 1 + s->passwd.len + 2;
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|
383 line.data = ngx_palloc(c->pool, line.len);
|
|
|
384 if (line.data == NULL) {
|
|
|
385 ngx_imap_proxy_internal_server_error(s);
|
|
|
386 return;
|
|
|
387 }
|
|
|
388
|
|
|
389 p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1);
|
|
|
390 p = ngx_cpymem(p, s->passwd.data, s->passwd.len);
|
|
|
391 *p++ = CR; *p = LF;
|
|
|
392
|
|
|
393 s->imap_state = ngx_pop3_passwd;
|
|
|
394 break;
|
|
|
395
|
|
212
|
396 case ngx_pop3_passwd:
|
|
|
397 s->connection->read->handler = ngx_imap_proxy_handler;
|
|
|
398 s->connection->write->handler = ngx_imap_proxy_handler;
|
|
|
399 rev->handler = ngx_imap_proxy_handler;
|
|
|
400 c->write->handler = ngx_imap_proxy_handler;
|
|
|
401
|
|
|
402 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
|
|
|
403 ngx_add_timer(s->connection->read, pcf->timeout);
|
|
|
404 ngx_del_timer(c->read);
|
|
|
405
|
|
|
406 c->log->action = NULL;
|
|
|
407 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
|
|
|
408
|
|
|
409 ngx_imap_proxy_handler(s->connection->write);
|
|
|
410
|
|
|
411 return;
|
|
|
412
|
|
76
|
413 default:
|
|
|
414 #if (NGX_SUPPRESS_WARN)
|
|
|
415 line.len = 0;
|
|
|
416 line.data = NULL;
|
|
|
417 #endif
|
|
|
418 break;
|
|
|
419 }
|
|
|
420
|
|
88
|
421 if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
|
|
76
|
422 /*
|
|
|
423 * we treat the incomplete sending as NGX_ERROR
|
|
|
424 * because it is very strange here
|
|
|
425 */
|
|
|
426 ngx_imap_proxy_internal_server_error(s);
|
|
|
427 return;
|
|
|
428 }
|
|
|
429
|
|
|
430 s->proxy->buffer->pos = s->proxy->buffer->start;
|
|
|
431 s->proxy->buffer->last = s->proxy->buffer->start;
|
|
|
432 }
|
|
|
433
|
|
|
434
|
|
|
435 static void
|
|
132
|
436 ngx_imap_proxy_dummy_handler(ngx_event_t *wev)
|
|
76
|
437 {
|
|
132
|
438 ngx_connection_t *c;
|
|
|
439 ngx_imap_session_t *s;
|
|
|
440
|
|
|
441 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, wev->log, 0, "imap proxy dummy handler");
|
|
|
442
|
|
|
443 if (ngx_handle_write_event(wev, 0) == NGX_ERROR) {
|
|
|
444 c = wev->data;
|
|
|
445 s = c->data;
|
|
|
446
|
|
|
447 ngx_imap_proxy_close_session(s);
|
|
|
448 }
|
|
76
|
449 }
|
|
|
450
|
|
|
451
|
|
|
452 static ngx_int_t
|
|
212
|
453 ngx_imap_proxy_read_response(ngx_imap_session_t *s, ngx_uint_t state)
|
|
76
|
454 {
|
|
|
455 u_char *p;
|
|
|
456 ssize_t n;
|
|
|
457 ngx_buf_t *b;
|
|
|
458
|
|
136
|
459 s->connection->log->action = "reading response from upstream";
|
|
|
460
|
|
76
|
461 b = s->proxy->buffer;
|
|
|
462
|
|
88
|
463 n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection,
|
|
|
464 b->last, b->end - b->last);
|
|
76
|
465
|
|
|
466 if (n == NGX_ERROR || n == 0) {
|
|
|
467 return NGX_ERROR;
|
|
|
468 }
|
|
|
469
|
|
|
470 if (n == NGX_AGAIN) {
|
|
|
471 return NGX_AGAIN;
|
|
|
472 }
|
|
|
473
|
|
|
474 b->last += n;
|
|
|
475
|
|
|
476 if (b->last - b->pos < 5) {
|
|
|
477 return NGX_AGAIN;
|
|
|
478 }
|
|
|
479
|
|
|
480 if (*(b->last - 2) != CR || *(b->last - 1) != LF) {
|
|
|
481 if (b->last == b->end) {
|
|
|
482 *(b->last - 1) = '\0';
|
|
|
483 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
|
|
|
484 "upstream sent too long response line: \"%s\"",
|
|
|
485 b->pos);
|
|
120
|
486 return NGX_ERROR;
|
|
76
|
487 }
|
|
|
488
|
|
|
489 return NGX_AGAIN;
|
|
|
490 }
|
|
|
491
|
|
|
492 p = b->pos;
|
|
|
493
|
|
|
494 if (s->protocol == NGX_IMAP_POP3_PROTOCOL) {
|
|
|
495 if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') {
|
|
|
496 return NGX_OK;
|
|
|
497 }
|
|
|
498
|
|
|
499 } else {
|
|
212
|
500 switch (state) {
|
|
|
501
|
|
|
502 case ngx_imap_start:
|
|
76
|
503 if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') {
|
|
|
504 return NGX_OK;
|
|
|
505 }
|
|
212
|
506 break;
|
|
76
|
507
|
|
212
|
508 case ngx_imap_login:
|
|
|
509 case ngx_imap_user:
|
|
78
|
510 if (p[0] == '+') {
|
|
76
|
511 return NGX_OK;
|
|
|
512 }
|
|
212
|
513 break;
|
|
|
514
|
|
|
515 case ngx_imap_passwd:
|
|
|
516 if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) {
|
|
|
517 p += s->tag.len;
|
|
|
518 if (p[0] == 'O' && p[1] == 'K') {
|
|
|
519 return NGX_OK;
|
|
|
520 }
|
|
|
521 }
|
|
|
522 break;
|
|
76
|
523 }
|
|
|
524 }
|
|
|
525
|
|
|
526 *(b->last - 2) = '\0';
|
|
|
527 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
|
|
|
528 "upstream sent invalid response: \"%s\"", p);
|
|
|
529
|
|
120
|
530 return NGX_ERROR;
|
|
76
|
531 }
|
|
|
532
|
|
|
533
|
|
|
534 static void
|
|
|
535 ngx_imap_proxy_handler(ngx_event_t *ev)
|
|
|
536 {
|
|
132
|
537 char *action, *recv_action, *send_action;
|
|
88
|
538 size_t size;
|
|
|
539 ssize_t n;
|
|
|
540 ngx_buf_t *b;
|
|
132
|
541 ngx_uint_t do_write;
|
|
88
|
542 ngx_connection_t *c, *src, *dst;
|
|
|
543 ngx_imap_session_t *s;
|
|
|
544 ngx_imap_proxy_conf_t *pcf;
|
|
76
|
545
|
|
|
546 c = ev->data;
|
|
|
547 s = c->data;
|
|
|
548
|
|
|
549 if (ev->timedout) {
|
|
132
|
550 c->log->action = "proxying";
|
|
|
551
|
|
76
|
552 if (c == s->connection) {
|
|
|
553 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
|
|
|
554 "client timed out");
|
|
126
|
555 c->timedout = 1;
|
|
|
556
|
|
76
|
557 } else {
|
|
|
558 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
|
|
|
559 "upstream timed out");
|
|
|
560 }
|
|
|
561
|
|
|
562 ngx_imap_proxy_close_session(s);
|
|
|
563 return;
|
|
|
564 }
|
|
|
565
|
|
|
566 if (c == s->connection) {
|
|
|
567 if (ev->write) {
|
|
132
|
568 recv_action = "proxying and reading from upstream";
|
|
|
569 send_action = "proxying and sending to client";
|
|
76
|
570 src = s->proxy->upstream.connection;
|
|
|
571 dst = c;
|
|
|
572 b = s->proxy->buffer;
|
|
|
573
|
|
|
574 } else {
|
|
132
|
575 recv_action = "proxying and reading from client";
|
|
|
576 send_action = "proxying and sending to upstream";
|
|
76
|
577 src = c;
|
|
|
578 dst = s->proxy->upstream.connection;
|
|
|
579 b = s->buffer;
|
|
|
580 }
|
|
|
581
|
|
|
582 } else {
|
|
|
583 if (ev->write) {
|
|
138
|
584 recv_action = "proxying and reading from client";
|
|
|
585 send_action = "proxying and sending to upstream";
|
|
76
|
586 src = s->connection;
|
|
|
587 dst = c;
|
|
|
588 b = s->buffer;
|
|
|
589
|
|
|
590 } else {
|
|
138
|
591 recv_action = "proxying and reading from upstream";
|
|
|
592 send_action = "proxying and sending to client";
|
|
76
|
593 src = c;
|
|
|
594 dst = s->connection;
|
|
|
595 b = s->proxy->buffer;
|
|
|
596 }
|
|
|
597 }
|
|
|
598
|
|
|
599 do_write = ev->write ? 1 : 0;
|
|
|
600
|
|
|
601 ngx_log_debug3(NGX_LOG_DEBUG_IMAP, ev->log, 0,
|
|
|
602 "imap proxy handler: %d, #%d > #%d",
|
|
|
603 do_write, src->fd, dst->fd);
|
|
|
604
|
|
132
|
605 for ( ;; ) {
|
|
76
|
606
|
|
132
|
607 if (do_write) {
|
|
76
|
608
|
|
|
609 size = b->last - b->pos;
|
|
|
610
|
|
|
611 if (size && dst->write->ready) {
|
|
132
|
612 c->log->action = send_action;
|
|
|
613
|
|
88
|
614 n = dst->send(dst, b->pos, size);
|
|
76
|
615
|
|
|
616 if (n == NGX_ERROR) {
|
|
|
617 ngx_imap_proxy_close_session(s);
|
|
|
618 return;
|
|
|
619 }
|
|
|
620
|
|
|
621 if (n > 0) {
|
|
|
622 b->pos += n;
|
|
|
623
|
|
|
624 if (b->pos == b->last) {
|
|
|
625 b->pos = b->start;
|
|
|
626 b->last = b->start;
|
|
|
627 }
|
|
|
628 }
|
|
|
629 }
|
|
|
630 }
|
|
|
631
|
|
|
632 size = b->end - b->last;
|
|
|
633
|
|
|
634 if (size && src->read->ready) {
|
|
132
|
635 c->log->action = recv_action;
|
|
|
636
|
|
88
|
637 n = src->recv(src, b->last, size);
|
|
76
|
638
|
|
132
|
639 if (n == NGX_AGAIN || n == 0) {
|
|
|
640 break;
|
|
76
|
641 }
|
|
|
642
|
|
|
643 if (n > 0) {
|
|
|
644 do_write = 1;
|
|
|
645 b->last += n;
|
|
132
|
646
|
|
|
647 continue;
|
|
76
|
648 }
|
|
|
649
|
|
132
|
650 if (n == NGX_ERROR) {
|
|
|
651 src->read->eof = 1;
|
|
88
|
652 }
|
|
76
|
653 }
|
|
|
654
|
|
132
|
655 break;
|
|
|
656 }
|
|
|
657
|
|
|
658 c->log->action = "proxying";
|
|
|
659
|
|
|
660 if ((s->connection->read->eof || s->proxy->upstream.connection->read->eof)
|
|
|
661 && s->buffer->pos == s->buffer->last
|
|
|
662 && s->proxy->buffer->pos == s->proxy->buffer->last)
|
|
|
663 {
|
|
|
664 action = c->log->action;
|
|
|
665 c->log->action = NULL;
|
|
|
666 ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done");
|
|
|
667 c->log->action = action;
|
|
|
668
|
|
|
669 ngx_imap_proxy_close_session(s);
|
|
|
670 return;
|
|
|
671 }
|
|
|
672
|
|
|
673 if (ngx_handle_write_event(dst->write, 0) == NGX_ERROR) {
|
|
|
674 ngx_imap_proxy_close_session(s);
|
|
|
675 return;
|
|
|
676 }
|
|
|
677
|
|
|
678 if (ngx_handle_read_event(dst->read, 0) == NGX_ERROR) {
|
|
|
679 ngx_imap_proxy_close_session(s);
|
|
|
680 return;
|
|
|
681 }
|
|
|
682
|
|
|
683 if (ngx_handle_write_event(src->write, 0) == NGX_ERROR) {
|
|
|
684 ngx_imap_proxy_close_session(s);
|
|
|
685 return;
|
|
|
686 }
|
|
|
687
|
|
|
688 if (ngx_handle_read_event(src->read, 0) == NGX_ERROR) {
|
|
|
689 ngx_imap_proxy_close_session(s);
|
|
|
690 return;
|
|
|
691 }
|
|
|
692
|
|
|
693 if (c == s->connection) {
|
|
|
694 pcf = ngx_imap_get_module_srv_conf(s, ngx_imap_proxy_module);
|
|
|
695 ngx_add_timer(c->read, pcf->timeout);
|
|
|
696 }
|
|
76
|
697 }
|
|
|
698
|
|
|
699
|
|
|
700 static void
|
|
|
701 ngx_imap_proxy_internal_server_error(ngx_imap_session_t *s)
|
|
|
702 {
|
|
|
703 if (s->proxy->upstream.connection) {
|
|
|
704 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, s->connection->log, 0,
|
|
|
705 "close imap proxy connection: %d",
|
|
|
706 s->proxy->upstream.connection->fd);
|
|
|
707
|
|
|
708 ngx_close_connection(s->proxy->upstream.connection);
|
|
|
709 }
|
|
|
710
|
|
|
711 ngx_imap_session_internal_server_error(s);
|
|
|
712 }
|
|
|
713
|
|
|
714
|
|
|
715 static void
|
|
|
716 ngx_imap_proxy_close_session(ngx_imap_session_t *s)
|
|
|
717 {
|
|
|
718 if (s->proxy->upstream.connection) {
|
|
|
719 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, s->connection->log, 0,
|
|
|
720 "close imap proxy connection: %d",
|
|
|
721 s->proxy->upstream.connection->fd);
|
|
|
722
|
|
|
723 ngx_close_connection(s->proxy->upstream.connection);
|
|
|
724 }
|
|
|
725
|
|
|
726 ngx_imap_close_connection(s->connection);
|
|
|
727 }
|
|
|
728
|
|
|
729
|
|
|
730 static void *
|
|
|
731 ngx_imap_proxy_create_conf(ngx_conf_t *cf)
|
|
126
|
732 {
|
|
76
|
733 ngx_imap_proxy_conf_t *pcf;
|
|
126
|
734
|
|
76
|
735 pcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_proxy_conf_t));
|
|
|
736 if (pcf == NULL) {
|
|
|
737 return NGX_CONF_ERROR;
|
|
|
738 }
|
|
|
739
|
|
|
740 pcf->enable = NGX_CONF_UNSET;
|
|
88
|
741 pcf->buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
742 pcf->timeout = NGX_CONF_UNSET_MSEC;
|
|
76
|
743
|
|
|
744 return pcf;
|
|
|
745 }
|
|
|
746
|
|
|
747
|
|
|
748 static char *
|
|
|
749 ngx_imap_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
750 {
|
|
|
751 ngx_imap_proxy_conf_t *prev = parent;
|
|
|
752 ngx_imap_proxy_conf_t *conf = child;
|
|
|
753
|
|
88
|
754 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
755 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
|
|
|
756 (size_t) ngx_pagesize);
|
|
|
757 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000);
|
|
76
|
758
|
|
|
759 return NGX_CONF_OK;
|
|
|
760 }
|
