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