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-rw-r--r--app/nginx/src/mail/ngx_mail_proxy_module.c1123
1 files changed, 0 insertions, 1123 deletions
diff --git a/app/nginx/src/mail/ngx_mail_proxy_module.c b/app/nginx/src/mail/ngx_mail_proxy_module.c
deleted file mode 100644
index 007284b..0000000
--- a/app/nginx/src/mail/ngx_mail_proxy_module.c
+++ /dev/null
@@ -1,1123 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- * Copyright (C) Nginx, Inc.
- */
-
-
-#include <ngx_config.h>
-#include <ngx_core.h>
-#include <ngx_event.h>
-#include <ngx_event_connect.h>
-#include <ngx_mail.h>
-
-
-typedef struct {
- ngx_flag_t enable;
- ngx_flag_t pass_error_message;
- ngx_flag_t xclient;
- size_t buffer_size;
- ngx_msec_t timeout;
-} ngx_mail_proxy_conf_t;
-
-
-static void ngx_mail_proxy_block_read(ngx_event_t *rev);
-static void ngx_mail_proxy_pop3_handler(ngx_event_t *rev);
-static void ngx_mail_proxy_imap_handler(ngx_event_t *rev);
-static void ngx_mail_proxy_smtp_handler(ngx_event_t *rev);
-static void ngx_mail_proxy_dummy_handler(ngx_event_t *ev);
-static ngx_int_t ngx_mail_proxy_read_response(ngx_mail_session_t *s,
- ngx_uint_t state);
-static void ngx_mail_proxy_handler(ngx_event_t *ev);
-static void ngx_mail_proxy_upstream_error(ngx_mail_session_t *s);
-static void ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s);
-static void ngx_mail_proxy_close_session(ngx_mail_session_t *s);
-static void *ngx_mail_proxy_create_conf(ngx_conf_t *cf);
-static char *ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent,
- void *child);
-
-
-static ngx_command_t ngx_mail_proxy_commands[] = {
-
- { ngx_string("proxy"),
- NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
- ngx_conf_set_flag_slot,
- NGX_MAIL_SRV_CONF_OFFSET,
- offsetof(ngx_mail_proxy_conf_t, enable),
- NULL },
-
- { ngx_string("proxy_buffer"),
- NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_size_slot,
- NGX_MAIL_SRV_CONF_OFFSET,
- offsetof(ngx_mail_proxy_conf_t, buffer_size),
- NULL },
-
- { ngx_string("proxy_timeout"),
- NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_msec_slot,
- NGX_MAIL_SRV_CONF_OFFSET,
- offsetof(ngx_mail_proxy_conf_t, timeout),
- NULL },
-
- { ngx_string("proxy_pass_error_message"),
- NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
- ngx_conf_set_flag_slot,
- NGX_MAIL_SRV_CONF_OFFSET,
- offsetof(ngx_mail_proxy_conf_t, pass_error_message),
- NULL },
-
- { ngx_string("xclient"),
- NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
- ngx_conf_set_flag_slot,
- NGX_MAIL_SRV_CONF_OFFSET,
- offsetof(ngx_mail_proxy_conf_t, xclient),
- NULL },
-
- ngx_null_command
-};
-
-
-static ngx_mail_module_t ngx_mail_proxy_module_ctx = {
- NULL, /* protocol */
-
- NULL, /* create main configuration */
- NULL, /* init main configuration */
-
- ngx_mail_proxy_create_conf, /* create server configuration */
- ngx_mail_proxy_merge_conf /* merge server configuration */
-};
-
-
-ngx_module_t ngx_mail_proxy_module = {
- NGX_MODULE_V1,
- &ngx_mail_proxy_module_ctx, /* module context */
- ngx_mail_proxy_commands, /* module directives */
- NGX_MAIL_MODULE, /* module type */
- NULL, /* init master */
- NULL, /* init module */
- NULL, /* init process */
- NULL, /* init thread */
- NULL, /* exit thread */
- NULL, /* exit process */
- NULL, /* exit master */
- NGX_MODULE_V1_PADDING
-};
-
-
-static u_char smtp_auth_ok[] = "235 2.0.0 OK" CRLF;
-
-
-void
-ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_addr_t *peer)
-{
- ngx_int_t rc;
- ngx_mail_proxy_ctx_t *p;
- ngx_mail_proxy_conf_t *pcf;
- ngx_mail_core_srv_conf_t *cscf;
-
- s->connection->log->action = "connecting to upstream";
-
- cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
-
- p = ngx_pcalloc(s->connection->pool, sizeof(ngx_mail_proxy_ctx_t));
- if (p == NULL) {
- ngx_mail_session_internal_server_error(s);
- return;
- }
-
- s->proxy = p;
-
- p->upstream.sockaddr = peer->sockaddr;
- p->upstream.socklen = peer->socklen;
- p->upstream.name = &peer->name;
- p->upstream.get = ngx_event_get_peer;
- p->upstream.log = s->connection->log;
- p->upstream.log_error = NGX_ERROR_ERR;
-
- rc = ngx_event_connect_peer(&p->upstream);
-
- if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- ngx_add_timer(p->upstream.connection->read, cscf->timeout);
-
- p->upstream.connection->data = s;
- p->upstream.connection->pool = s->connection->pool;
-
- s->connection->read->handler = ngx_mail_proxy_block_read;
- p->upstream.connection->write->handler = ngx_mail_proxy_dummy_handler;
-
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
-
- s->proxy->buffer = ngx_create_temp_buf(s->connection->pool,
- pcf->buffer_size);
- if (s->proxy->buffer == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- s->out.len = 0;
-
- switch (s->protocol) {
-
- case NGX_MAIL_POP3_PROTOCOL:
- p->upstream.connection->read->handler = ngx_mail_proxy_pop3_handler;
- s->mail_state = ngx_pop3_start;
- break;
-
- case NGX_MAIL_IMAP_PROTOCOL:
- p->upstream.connection->read->handler = ngx_mail_proxy_imap_handler;
- s->mail_state = ngx_imap_start;
- break;
-
- default: /* NGX_MAIL_SMTP_PROTOCOL */
- p->upstream.connection->read->handler = ngx_mail_proxy_smtp_handler;
- s->mail_state = ngx_smtp_start;
- break;
- }
-}
-
-
-static void
-ngx_mail_proxy_block_read(ngx_event_t *rev)
-{
- ngx_connection_t *c;
- ngx_mail_session_t *s;
-
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy block read");
-
- if (ngx_handle_read_event(rev, 0) != NGX_OK) {
- c = rev->data;
- s = c->data;
-
- ngx_mail_proxy_close_session(s);
- }
-}
-
-
-static void
-ngx_mail_proxy_pop3_handler(ngx_event_t *rev)
-{
- u_char *p;
- ngx_int_t rc;
- ngx_str_t line;
- ngx_connection_t *c;
- ngx_mail_session_t *s;
- ngx_mail_proxy_conf_t *pcf;
-
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy pop3 auth handler");
-
- c = rev->data;
- s = c->data;
-
- if (rev->timedout) {
- ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
- "upstream timed out");
- c->timedout = 1;
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- rc = ngx_mail_proxy_read_response(s, 0);
-
- if (rc == NGX_AGAIN) {
- return;
- }
-
- if (rc == NGX_ERROR) {
- ngx_mail_proxy_upstream_error(s);
- return;
- }
-
- switch (s->mail_state) {
-
- case ngx_pop3_start:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user");
-
- s->connection->log->action = "sending user name to upstream";
-
- line.len = sizeof("USER ") - 1 + s->login.len + 2;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1);
- p = ngx_cpymem(p, s->login.data, s->login.len);
- *p++ = CR; *p = LF;
-
- s->mail_state = ngx_pop3_user;
- break;
-
- case ngx_pop3_user:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send pass");
-
- s->connection->log->action = "sending password to upstream";
-
- line.len = sizeof("PASS ") - 1 + s->passwd.len + 2;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1);
- p = ngx_cpymem(p, s->passwd.data, s->passwd.len);
- *p++ = CR; *p = LF;
-
- s->mail_state = ngx_pop3_passwd;
- break;
-
- case ngx_pop3_passwd:
- s->connection->read->handler = ngx_mail_proxy_handler;
- s->connection->write->handler = ngx_mail_proxy_handler;
- rev->handler = ngx_mail_proxy_handler;
- c->write->handler = ngx_mail_proxy_handler;
-
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
- ngx_add_timer(s->connection->read, pcf->timeout);
- ngx_del_timer(c->read);
-
- c->log->action = NULL;
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
-
- ngx_mail_proxy_handler(s->connection->write);
-
- return;
-
- default:
-#if (NGX_SUPPRESS_WARN)
- ngx_str_null(&line);
-#endif
- break;
- }
-
- if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
- /*
- * we treat the incomplete sending as NGX_ERROR
- * because it is very strange here
- */
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- s->proxy->buffer->pos = s->proxy->buffer->start;
- s->proxy->buffer->last = s->proxy->buffer->start;
-}
-
-
-static void
-ngx_mail_proxy_imap_handler(ngx_event_t *rev)
-{
- u_char *p;
- ngx_int_t rc;
- ngx_str_t line;
- ngx_connection_t *c;
- ngx_mail_session_t *s;
- ngx_mail_proxy_conf_t *pcf;
-
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy imap auth handler");
-
- c = rev->data;
- s = c->data;
-
- if (rev->timedout) {
- ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
- "upstream timed out");
- c->timedout = 1;
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- rc = ngx_mail_proxy_read_response(s, s->mail_state);
-
- if (rc == NGX_AGAIN) {
- return;
- }
-
- if (rc == NGX_ERROR) {
- ngx_mail_proxy_upstream_error(s);
- return;
- }
-
- switch (s->mail_state) {
-
- case ngx_imap_start:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy send login");
-
- s->connection->log->action = "sending LOGIN command to upstream";
-
- line.len = s->tag.len + sizeof("LOGIN ") - 1
- + 1 + NGX_SIZE_T_LEN + 1 + 2;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF,
- &s->tag, s->login.len)
- - line.data;
-
- s->mail_state = ngx_imap_login;
- break;
-
- case ngx_imap_login:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user");
-
- s->connection->log->action = "sending user name to upstream";
-
- line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF,
- &s->login, s->passwd.len)
- - line.data;
-
- s->mail_state = ngx_imap_user;
- break;
-
- case ngx_imap_user:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy send passwd");
-
- s->connection->log->action = "sending password to upstream";
-
- line.len = s->passwd.len + 2;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len);
- *p++ = CR; *p = LF;
-
- s->mail_state = ngx_imap_passwd;
- break;
-
- case ngx_imap_passwd:
- s->connection->read->handler = ngx_mail_proxy_handler;
- s->connection->write->handler = ngx_mail_proxy_handler;
- rev->handler = ngx_mail_proxy_handler;
- c->write->handler = ngx_mail_proxy_handler;
-
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
- ngx_add_timer(s->connection->read, pcf->timeout);
- ngx_del_timer(c->read);
-
- c->log->action = NULL;
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
-
- ngx_mail_proxy_handler(s->connection->write);
-
- return;
-
- default:
-#if (NGX_SUPPRESS_WARN)
- ngx_str_null(&line);
-#endif
- break;
- }
-
- if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
- /*
- * we treat the incomplete sending as NGX_ERROR
- * because it is very strange here
- */
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- s->proxy->buffer->pos = s->proxy->buffer->start;
- s->proxy->buffer->last = s->proxy->buffer->start;
-}
-
-
-static void
-ngx_mail_proxy_smtp_handler(ngx_event_t *rev)
-{
- u_char *p;
- ngx_int_t rc;
- ngx_str_t line;
- ngx_buf_t *b;
- ngx_connection_t *c;
- ngx_mail_session_t *s;
- ngx_mail_proxy_conf_t *pcf;
- ngx_mail_core_srv_conf_t *cscf;
-
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy smtp auth handler");
-
- c = rev->data;
- s = c->data;
-
- if (rev->timedout) {
- ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
- "upstream timed out");
- c->timedout = 1;
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- rc = ngx_mail_proxy_read_response(s, s->mail_state);
-
- if (rc == NGX_AGAIN) {
- return;
- }
-
- if (rc == NGX_ERROR) {
- ngx_mail_proxy_upstream_error(s);
- return;
- }
-
- switch (s->mail_state) {
-
- case ngx_smtp_start:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send ehlo");
-
- s->connection->log->action = "sending HELO/EHLO to upstream";
-
- cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
-
- line.len = sizeof("HELO ") - 1 + cscf->server_name.len + 2;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
-
- p = ngx_cpymem(line.data,
- ((s->esmtp || pcf->xclient) ? "EHLO " : "HELO "),
- sizeof("HELO ") - 1);
-
- p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
- *p++ = CR; *p = LF;
-
- if (pcf->xclient) {
- s->mail_state = ngx_smtp_helo_xclient;
-
- } else if (s->auth_method == NGX_MAIL_AUTH_NONE) {
- s->mail_state = ngx_smtp_helo_from;
-
- } else {
- s->mail_state = ngx_smtp_helo;
- }
-
- break;
-
- case ngx_smtp_helo_xclient:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy send xclient");
-
- s->connection->log->action = "sending XCLIENT to upstream";
-
- line.len = sizeof("XCLIENT ADDR= LOGIN= NAME="
- CRLF) - 1
- + s->connection->addr_text.len + s->login.len + s->host.len;
-
-#if (NGX_HAVE_INET6)
- if (s->connection->sockaddr->sa_family == AF_INET6) {
- line.len += sizeof("IPV6:") - 1;
- }
-#endif
-
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- p = ngx_cpymem(line.data, "XCLIENT ADDR=", sizeof("XCLIENT ADDR=") - 1);
-
-#if (NGX_HAVE_INET6)
- if (s->connection->sockaddr->sa_family == AF_INET6) {
- p = ngx_cpymem(p, "IPV6:", sizeof("IPV6:") - 1);
- }
-#endif
-
- p = ngx_copy(p, s->connection->addr_text.data,
- s->connection->addr_text.len);
-
- if (s->login.len) {
- p = ngx_cpymem(p, " LOGIN=", sizeof(" LOGIN=") - 1);
- p = ngx_copy(p, s->login.data, s->login.len);
- }
-
- p = ngx_cpymem(p, " NAME=", sizeof(" NAME=") - 1);
- p = ngx_copy(p, s->host.data, s->host.len);
-
- *p++ = CR; *p++ = LF;
-
- line.len = p - line.data;
-
- if (s->smtp_helo.len) {
- s->mail_state = ngx_smtp_xclient_helo;
-
- } else if (s->auth_method == NGX_MAIL_AUTH_NONE) {
- s->mail_state = ngx_smtp_xclient_from;
-
- } else {
- s->mail_state = ngx_smtp_xclient;
- }
-
- break;
-
- case ngx_smtp_xclient_helo:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy send client ehlo");
-
- s->connection->log->action = "sending client HELO/EHLO to upstream";
-
- line.len = sizeof("HELO " CRLF) - 1 + s->smtp_helo.len;
-
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- line.len = ngx_sprintf(line.data,
- ((s->esmtp) ? "EHLO %V" CRLF : "HELO %V" CRLF),
- &s->smtp_helo)
- - line.data;
-
- s->mail_state = (s->auth_method == NGX_MAIL_AUTH_NONE) ?
- ngx_smtp_helo_from : ngx_smtp_helo;
-
- break;
-
- case ngx_smtp_helo_from:
- case ngx_smtp_xclient_from:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy send mail from");
-
- s->connection->log->action = "sending MAIL FROM to upstream";
-
- line.len = s->smtp_from.len + sizeof(CRLF) - 1;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- p = ngx_cpymem(line.data, s->smtp_from.data, s->smtp_from.len);
- *p++ = CR; *p = LF;
-
- s->mail_state = ngx_smtp_from;
-
- break;
-
- case ngx_smtp_from:
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
- "mail proxy send rcpt to");
-
- s->connection->log->action = "sending RCPT TO to upstream";
-
- line.len = s->smtp_to.len + sizeof(CRLF) - 1;
- line.data = ngx_pnalloc(c->pool, line.len);
- if (line.data == NULL) {
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- p = ngx_cpymem(line.data, s->smtp_to.data, s->smtp_to.len);
- *p++ = CR; *p = LF;
-
- s->mail_state = ngx_smtp_to;
-
- break;
-
- case ngx_smtp_helo:
- case ngx_smtp_xclient:
- case ngx_smtp_to:
-
- b = s->proxy->buffer;
-
- if (s->auth_method == NGX_MAIL_AUTH_NONE) {
- b->pos = b->start;
-
- } else {
- ngx_memcpy(b->start, smtp_auth_ok, sizeof(smtp_auth_ok) - 1);
- b->last = b->start + sizeof(smtp_auth_ok) - 1;
- }
-
- s->connection->read->handler = ngx_mail_proxy_handler;
- s->connection->write->handler = ngx_mail_proxy_handler;
- rev->handler = ngx_mail_proxy_handler;
- c->write->handler = ngx_mail_proxy_handler;
-
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
- ngx_add_timer(s->connection->read, pcf->timeout);
- ngx_del_timer(c->read);
-
- c->log->action = NULL;
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
-
- if (s->buffer->pos == s->buffer->last) {
- ngx_mail_proxy_handler(s->connection->write);
-
- } else {
- ngx_mail_proxy_handler(c->write);
- }
-
- return;
-
- default:
-#if (NGX_SUPPRESS_WARN)
- ngx_str_null(&line);
-#endif
- break;
- }
-
- if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
- /*
- * we treat the incomplete sending as NGX_ERROR
- * because it is very strange here
- */
- ngx_mail_proxy_internal_server_error(s);
- return;
- }
-
- s->proxy->buffer->pos = s->proxy->buffer->start;
- s->proxy->buffer->last = s->proxy->buffer->start;
-}
-
-
-static void
-ngx_mail_proxy_dummy_handler(ngx_event_t *wev)
-{
- ngx_connection_t *c;
- ngx_mail_session_t *s;
-
- ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0, "mail proxy dummy handler");
-
- if (ngx_handle_write_event(wev, 0) != NGX_OK) {
- c = wev->data;
- s = c->data;
-
- ngx_mail_proxy_close_session(s);
- }
-}
-
-
-static ngx_int_t
-ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state)
-{
- u_char *p, *m;
- ssize_t n;
- ngx_buf_t *b;
- ngx_mail_proxy_conf_t *pcf;
-
- s->connection->log->action = "reading response from upstream";
-
- b = s->proxy->buffer;
-
- n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection,
- b->last, b->end - b->last);
-
- if (n == NGX_ERROR || n == 0) {
- return NGX_ERROR;
- }
-
- if (n == NGX_AGAIN) {
- return NGX_AGAIN;
- }
-
- b->last += n;
-
- if (b->last - b->pos < 4) {
- return NGX_AGAIN;
- }
-
- if (*(b->last - 2) != CR || *(b->last - 1) != LF) {
- if (b->last == b->end) {
- *(b->last - 1) = '\0';
- ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
- "upstream sent too long response line: \"%s\"",
- b->pos);
- return NGX_ERROR;
- }
-
- return NGX_AGAIN;
- }
-
- p = b->pos;
-
- switch (s->protocol) {
-
- case NGX_MAIL_POP3_PROTOCOL:
- if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') {
- return NGX_OK;
- }
- break;
-
- case NGX_MAIL_IMAP_PROTOCOL:
- switch (state) {
-
- case ngx_imap_start:
- if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') {
- return NGX_OK;
- }
- break;
-
- case ngx_imap_login:
- case ngx_imap_user:
- if (p[0] == '+') {
- return NGX_OK;
- }
- break;
-
- case ngx_imap_passwd:
- if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) {
- p += s->tag.len;
- if (p[0] == 'O' && p[1] == 'K') {
- return NGX_OK;
- }
- }
- break;
- }
-
- break;
-
- default: /* NGX_MAIL_SMTP_PROTOCOL */
-
- if (p[3] == '-') {
- /* multiline reply, check if we got last line */
-
- m = b->last - (sizeof(CRLF "200" CRLF) - 1);
-
- while (m > p) {
- if (m[0] == CR && m[1] == LF) {
- break;
- }
-
- m--;
- }
-
- if (m <= p || m[5] == '-') {
- return NGX_AGAIN;
- }
- }
-
- switch (state) {
-
- case ngx_smtp_start:
- if (p[0] == '2' && p[1] == '2' && p[2] == '0') {
- return NGX_OK;
- }
- break;
-
- case ngx_smtp_helo:
- case ngx_smtp_helo_xclient:
- case ngx_smtp_helo_from:
- case ngx_smtp_from:
- if (p[0] == '2' && p[1] == '5' && p[2] == '0') {
- return NGX_OK;
- }
- break;
-
- case ngx_smtp_xclient:
- case ngx_smtp_xclient_from:
- case ngx_smtp_xclient_helo:
- if (p[0] == '2' && (p[1] == '2' || p[1] == '5') && p[2] == '0') {
- return NGX_OK;
- }
- break;
-
- case ngx_smtp_to:
- return NGX_OK;
- }
-
- break;
- }
-
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
-
- if (pcf->pass_error_message == 0) {
- *(b->last - 2) = '\0';
- ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
- "upstream sent invalid response: \"%s\"", p);
- return NGX_ERROR;
- }
-
- s->out.len = b->last - p - 2;
- s->out.data = p;
-
- ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
- "upstream sent invalid response: \"%V\"", &s->out);
-
- s->out.len = b->last - b->pos;
- s->out.data = b->pos;
-
- return NGX_ERROR;
-}
-
-
-static void
-ngx_mail_proxy_handler(ngx_event_t *ev)
-{
- char *action, *recv_action, *send_action;
- size_t size;
- ssize_t n;
- ngx_buf_t *b;
- ngx_uint_t do_write;
- ngx_connection_t *c, *src, *dst;
- ngx_mail_session_t *s;
- ngx_mail_proxy_conf_t *pcf;
-
- c = ev->data;
- s = c->data;
-
- if (ev->timedout) {
- c->log->action = "proxying";
-
- if (c == s->connection) {
- ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
- "client timed out");
- c->timedout = 1;
-
- } else {
- ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
- "upstream timed out");
- }
-
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (c == s->connection) {
- if (ev->write) {
- recv_action = "proxying and reading from upstream";
- send_action = "proxying and sending to client";
- src = s->proxy->upstream.connection;
- dst = c;
- b = s->proxy->buffer;
-
- } else {
- recv_action = "proxying and reading from client";
- send_action = "proxying and sending to upstream";
- src = c;
- dst = s->proxy->upstream.connection;
- b = s->buffer;
- }
-
- } else {
- if (ev->write) {
- recv_action = "proxying and reading from client";
- send_action = "proxying and sending to upstream";
- src = s->connection;
- dst = c;
- b = s->buffer;
-
- } else {
- recv_action = "proxying and reading from upstream";
- send_action = "proxying and sending to client";
- src = c;
- dst = s->connection;
- b = s->proxy->buffer;
- }
- }
-
- do_write = ev->write ? 1 : 0;
-
- ngx_log_debug3(NGX_LOG_DEBUG_MAIL, ev->log, 0,
- "mail proxy handler: %ui, #%d > #%d",
- do_write, src->fd, dst->fd);
-
- for ( ;; ) {
-
- if (do_write) {
-
- size = b->last - b->pos;
-
- if (size && dst->write->ready) {
- c->log->action = send_action;
-
- n = dst->send(dst, b->pos, size);
-
- if (n == NGX_ERROR) {
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (n > 0) {
- b->pos += n;
-
- if (b->pos == b->last) {
- b->pos = b->start;
- b->last = b->start;
- }
- }
- }
- }
-
- size = b->end - b->last;
-
- if (size && src->read->ready) {
- c->log->action = recv_action;
-
- n = src->recv(src, b->last, size);
-
- if (n == NGX_AGAIN || n == 0) {
- break;
- }
-
- if (n > 0) {
- do_write = 1;
- b->last += n;
-
- continue;
- }
-
- if (n == NGX_ERROR) {
- src->read->eof = 1;
- }
- }
-
- break;
- }
-
- c->log->action = "proxying";
-
- if ((s->connection->read->eof && s->buffer->pos == s->buffer->last)
- || (s->proxy->upstream.connection->read->eof
- && s->proxy->buffer->pos == s->proxy->buffer->last)
- || (s->connection->read->eof
- && s->proxy->upstream.connection->read->eof))
- {
- action = c->log->action;
- c->log->action = NULL;
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done");
- c->log->action = action;
-
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (ngx_handle_write_event(dst->write, 0) != NGX_OK) {
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (ngx_handle_read_event(dst->read, 0) != NGX_OK) {
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (ngx_handle_write_event(src->write, 0) != NGX_OK) {
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (ngx_handle_read_event(src->read, 0) != NGX_OK) {
- ngx_mail_proxy_close_session(s);
- return;
- }
-
- if (c == s->connection) {
- pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
- ngx_add_timer(c->read, pcf->timeout);
- }
-}
-
-
-static void
-ngx_mail_proxy_upstream_error(ngx_mail_session_t *s)
-{
- if (s->proxy->upstream.connection) {
- ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
- "close mail proxy connection: %d",
- s->proxy->upstream.connection->fd);
-
- ngx_close_connection(s->proxy->upstream.connection);
- }
-
- if (s->out.len == 0) {
- ngx_mail_session_internal_server_error(s);
- return;
- }
-
- s->quit = 1;
- ngx_mail_send(s->connection->write);
-}
-
-
-static void
-ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s)
-{
- if (s->proxy->upstream.connection) {
- ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
- "close mail proxy connection: %d",
- s->proxy->upstream.connection->fd);
-
- ngx_close_connection(s->proxy->upstream.connection);
- }
-
- ngx_mail_session_internal_server_error(s);
-}
-
-
-static void
-ngx_mail_proxy_close_session(ngx_mail_session_t *s)
-{
- if (s->proxy->upstream.connection) {
- ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
- "close mail proxy connection: %d",
- s->proxy->upstream.connection->fd);
-
- ngx_close_connection(s->proxy->upstream.connection);
- }
-
- ngx_mail_close_connection(s->connection);
-}
-
-
-static void *
-ngx_mail_proxy_create_conf(ngx_conf_t *cf)
-{
- ngx_mail_proxy_conf_t *pcf;
-
- pcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_proxy_conf_t));
- if (pcf == NULL) {
- return NULL;
- }
-
- pcf->enable = NGX_CONF_UNSET;
- pcf->pass_error_message = NGX_CONF_UNSET;
- pcf->xclient = NGX_CONF_UNSET;
- pcf->buffer_size = NGX_CONF_UNSET_SIZE;
- pcf->timeout = NGX_CONF_UNSET_MSEC;
-
- return pcf;
-}
-
-
-static char *
-ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child)
-{
- ngx_mail_proxy_conf_t *prev = parent;
- ngx_mail_proxy_conf_t *conf = child;
-
- ngx_conf_merge_value(conf->enable, prev->enable, 0);
- ngx_conf_merge_value(conf->pass_error_message, prev->pass_error_message, 0);
- ngx_conf_merge_value(conf->xclient, prev->xclient, 1);
- ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
- (size_t) ngx_pagesize);
- ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000);
-
- return NGX_CONF_OK;
-}