Mercurial > dovecot > core-2.2
annotate src/lmtp/lmtp-proxy.c @ 18137:3009a1a6f6d5
global: freshen copyright
Robomatically:
git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-4]/$1-2015/g;s/ (201[0-4]) Dovecot/ $1-2015 Dovecot/'
Happy 2015 everyone!
Signed-off-by: Phil Carmody <phil@dovecot.fi>
author | Phil Carmody <phil@dovecot.fi> |
---|---|
date | Mon, 05 Jan 2015 22:20:10 +0200 |
parents | 3db5fbb216d3 |
children | b64bcee2ffa0 |
rev | line source |
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18137 | 1 /* Copyright (c) 2009-2015 Dovecot authors, see the included COPYING file */ |
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2 |
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3 #include "lib.h" |
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4 #include "array.h" |
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5 #include "ioloop.h" |
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6 #include "istream.h" |
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7 #include "istream-sized.h" |
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8 #include "ostream.h" |
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9 #include "lmtp-client.h" |
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10 #include "lmtp-proxy.h" |
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11 |
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12 #define LMTP_MAX_LINE_LEN 1024 |
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13 |
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14 struct lmtp_proxy_recipient { |
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15 struct lmtp_proxy_connection *conn; |
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16 const char *address; |
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17 const char *reply; |
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18 |
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19 unsigned int rcpt_to_failed:1; |
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20 unsigned int data_reply_received:1; |
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21 }; |
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22 |
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23 struct lmtp_proxy_connection { |
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24 struct lmtp_proxy *proxy; |
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25 struct lmtp_proxy_rcpt_settings set; |
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26 |
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27 struct lmtp_client *client; |
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28 struct istream *data_input; |
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29 struct timeout *to; |
10415 | 30 |
31 unsigned int finished:1; | |
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32 unsigned int failed:1; |
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33 }; |
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34 |
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35 struct lmtp_proxy { |
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36 pool_t pool; |
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37 const char *mail_from; |
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38 struct lmtp_proxy_settings set; |
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39 |
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40 ARRAY(struct lmtp_proxy_connection *) connections; |
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41 ARRAY(struct lmtp_proxy_recipient *) rcpt_to; |
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42 unsigned int next_data_reply_idx; |
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43 |
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44 struct timeout *to_finish; |
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45 struct istream *data_input; |
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46 struct ostream *client_output; |
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47 |
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48 unsigned int max_timeout_msecs; |
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49 |
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50 lmtp_proxy_finish_callback_t *finish_callback; |
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51 void *finish_context; |
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52 |
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53 unsigned int finished:1; |
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54 }; |
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55 |
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56 static void lmtp_conn_finish(void *context); |
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57 |
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58 struct lmtp_proxy * |
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59 lmtp_proxy_init(const struct lmtp_proxy_settings *set, |
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60 struct ostream *client_output) |
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61 { |
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62 struct lmtp_proxy *proxy; |
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63 pool_t pool; |
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64 |
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65 i_assert(set->proxy_ttl > 0); |
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66 o_stream_ref(client_output); |
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67 |
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68 pool = pool_alloconly_create("lmtp proxy", 1024); |
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69 proxy = p_new(pool, struct lmtp_proxy, 1); |
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70 proxy->pool = pool; |
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71 proxy->client_output = client_output; |
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72 proxy->set.my_hostname = p_strdup(pool, set->my_hostname); |
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73 proxy->set.dns_client_socket_path = |
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74 p_strdup(pool, set->dns_client_socket_path); |
15005 | 75 proxy->set.session_id = p_strdup(pool, set->session_id); |
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76 proxy->set.source_ip = set->source_ip; |
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77 proxy->set.source_port = set->source_port; |
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78 proxy->set.proxy_ttl = set->proxy_ttl; |
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79 i_array_init(&proxy->rcpt_to, 32); |
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80 i_array_init(&proxy->connections, 32); |
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81 return proxy; |
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82 } |
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83 |
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84 static void lmtp_proxy_connections_deinit(struct lmtp_proxy *proxy) |
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85 { |
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86 struct lmtp_proxy_connection *const *conns; |
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87 |
10406 | 88 array_foreach(&proxy->connections, conns) { |
89 struct lmtp_proxy_connection *conn = *conns; | |
90 | |
91 lmtp_client_deinit(&conn->client); | |
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92 } |
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93 } |
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94 |
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95 void lmtp_proxy_deinit(struct lmtp_proxy **_proxy) |
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96 { |
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97 struct lmtp_proxy *proxy = *_proxy; |
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98 |
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99 *_proxy = NULL; |
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100 |
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101 lmtp_proxy_connections_deinit(proxy); |
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102 if (proxy->data_input != NULL) |
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103 i_stream_unref(&proxy->data_input); |
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104 if (proxy->client_output != NULL) |
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105 o_stream_unref(&proxy->client_output); |
10824 | 106 if (proxy->to_finish != NULL) |
107 timeout_remove(&proxy->to_finish); | |
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108 array_free(&proxy->rcpt_to); |
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109 array_free(&proxy->connections); |
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110 pool_unref(&proxy->pool); |
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111 } |
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112 |
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113 void lmtp_proxy_mail_from(struct lmtp_proxy *proxy, const char *value) |
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114 { |
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115 proxy->mail_from = p_strdup(proxy->pool, value); |
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116 } |
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117 |
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118 static struct lmtp_proxy_connection * |
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119 lmtp_proxy_get_connection(struct lmtp_proxy *proxy, |
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120 const struct lmtp_proxy_rcpt_settings *set) |
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121 { |
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122 struct lmtp_proxy_connection *const *conns, *conn; |
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123 struct lmtp_client_settings client_set; |
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124 |
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125 i_assert(set->timeout_msecs > 0); |
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126 |
10406 | 127 array_foreach(&proxy->connections, conns) { |
128 conn = *conns; | |
129 | |
130 if (conn->set.port == set->port && | |
131 strcmp(conn->set.host, set->host) == 0) | |
132 return conn; | |
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133 } |
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134 |
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135 memset(&client_set, 0, sizeof(client_set)); |
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136 client_set.mail_from = proxy->mail_from; |
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137 client_set.my_hostname = proxy->set.my_hostname; |
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138 client_set.dns_client_socket_path = proxy->set.dns_client_socket_path; |
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139 client_set.source_ip = proxy->set.source_ip; |
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140 client_set.source_port = proxy->set.source_port; |
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141 client_set.proxy_ttl = proxy->set.proxy_ttl; |
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142 client_set.proxy_timeout_secs = set->timeout_msecs/1000; |
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143 |
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144 conn = p_new(proxy->pool, struct lmtp_proxy_connection, 1); |
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145 conn->proxy = proxy; |
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146 conn->set.host = p_strdup(proxy->pool, set->host); |
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147 conn->set.port = set->port; |
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148 conn->set.timeout_msecs = set->timeout_msecs; |
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149 array_append(&proxy->connections, &conn, 1); |
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150 |
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151 conn->client = lmtp_client_init(&client_set, lmtp_conn_finish, conn); |
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152 if (lmtp_client_connect_tcp(conn->client, set->protocol, |
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153 conn->set.host, conn->set.port) < 0) |
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154 conn->failed = TRUE; |
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155 |
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156 if (proxy->max_timeout_msecs < set->timeout_msecs) |
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157 proxy->max_timeout_msecs = set->timeout_msecs; |
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158 return conn; |
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159 } |
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160 |
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161 static bool lmtp_proxy_send_data_replies(struct lmtp_proxy *proxy) |
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162 { |
10415 | 163 struct lmtp_proxy_recipient *const *rcpt; |
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164 unsigned int i, count; |
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165 |
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166 o_stream_cork(proxy->client_output); |
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167 rcpt = array_get(&proxy->rcpt_to, &count); |
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168 for (i = proxy->next_data_reply_idx; i < count; i++) { |
10415 | 169 if (!(rcpt[i]->rcpt_to_failed || rcpt[i]->data_reply_received)) |
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170 break; |
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171 o_stream_nsend_str(proxy->client_output, |
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172 t_strconcat(rcpt[i]->reply, "\r\n", NULL)); |
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173 } |
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174 o_stream_uncork(proxy->client_output); |
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175 proxy->next_data_reply_idx = i; |
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176 |
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177 return i == count; |
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178 } |
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179 |
10415 | 180 static void lmtp_proxy_finish_timeout(struct lmtp_proxy *proxy) |
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181 { |
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182 i_assert(!proxy->finished); |
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183 |
10415 | 184 timeout_remove(&proxy->to_finish); |
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185 proxy->finished = TRUE; |
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186 proxy->finish_callback(proxy->finish_context); |
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187 } |
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188 |
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189 static void lmtp_proxy_try_finish(struct lmtp_proxy *proxy) |
10415 | 190 { |
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191 if (proxy->finish_callback == NULL) { |
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192 /* DATA command hasn't been sent yet */ |
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193 return; |
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194 } |
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195 if (!lmtp_proxy_send_data_replies(proxy)) { |
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196 /* we can't received reply from all clients yet */ |
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197 return; |
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198 } |
10415 | 199 /* do the actual finishing in a timeout handler, since the finish |
200 callback causes the proxy to be destroyed and the code leading up | |
201 to this function can be called from many different places. it's | |
202 easier this way rather than having all the callers check if the | |
203 proxy was already destroyed. */ | |
204 if (proxy->to_finish == NULL) { | |
205 proxy->to_finish = timeout_add(0, lmtp_proxy_finish_timeout, | |
206 proxy); | |
207 } | |
208 } | |
209 | |
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210 static void lmtp_conn_finish(void *context) |
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211 { |
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212 struct lmtp_proxy_connection *conn = context; |
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213 |
10415 | 214 conn->finished = TRUE; |
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215 if (conn->to != NULL) |
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216 timeout_remove(&conn->to); |
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217 if (conn->data_input != NULL) |
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218 i_stream_unref(&conn->data_input); |
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219 lmtp_proxy_try_finish(conn->proxy); |
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220 } |
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221 |
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222 static void |
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223 lmtp_proxy_conn_rcpt_to(enum lmtp_client_result result, |
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224 const char *reply, void *context) |
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225 { |
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226 struct lmtp_proxy_recipient *rcpt = context; |
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227 struct lmtp_proxy_connection *conn = rcpt->conn; |
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228 |
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229 i_assert(rcpt->reply == NULL); |
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230 |
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231 rcpt->reply = p_strdup(conn->proxy->pool, reply); |
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232 rcpt->rcpt_to_failed = result != LMTP_CLIENT_RESULT_OK; |
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233 } |
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234 |
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235 static void |
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236 lmtp_proxy_conn_data(enum lmtp_client_result result, |
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237 const char *reply, void *context) |
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238 { |
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239 struct lmtp_proxy_recipient *rcpt = context; |
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240 struct lmtp_proxy_connection *conn = rcpt->conn; |
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241 |
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242 i_assert(!rcpt->rcpt_to_failed); |
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243 i_assert(rcpt->reply != NULL); |
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245 /* reset timeout in case there are a lot of RCPT TOs */ |
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246 if (conn->to != NULL) |
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247 timeout_reset(conn->to); |
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248 |
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249 rcpt->reply = p_strdup(conn->proxy->pool, reply); |
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250 rcpt->data_reply_received = TRUE; |
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251 |
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252 switch (result) { |
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253 case LMTP_CLIENT_RESULT_OK: |
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254 i_info("%s: Sent message to <%s> at %s:%u: %s", |
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255 conn->proxy->set.session_id, rcpt->address, |
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256 conn->set.host, conn->set.port, reply); |
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257 break; |
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258 case LMTP_CLIENT_RESULT_REMOTE_ERROR: |
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259 /* the problem isn't with the proxy, it's with the remote side. |
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260 so the remote side will log an error, while for us this is |
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261 just an info event */ |
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262 i_info("%s: Failed to send message to <%s> at %s:%u: %s", |
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263 conn->proxy->set.session_id, rcpt->address, |
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264 conn->set.host, conn->set.port, reply); |
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265 break; |
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266 case LMTP_CLIENT_RESULT_INTERNAL_ERROR: |
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267 i_error("%s: Failed to send message to <%s> at %s:%u: %s", |
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268 conn->proxy->set.session_id, rcpt->address, |
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269 conn->set.host, conn->set.port, reply); |
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270 break; |
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271 } |
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272 |
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273 lmtp_proxy_try_finish(conn->proxy); |
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274 } |
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275 |
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276 int lmtp_proxy_add_rcpt(struct lmtp_proxy *proxy, const char *address, |
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277 const struct lmtp_proxy_rcpt_settings *set) |
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278 { |
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279 struct lmtp_proxy_connection *conn; |
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280 struct lmtp_proxy_recipient *rcpt; |
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281 |
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282 conn = lmtp_proxy_get_connection(proxy, set); |
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283 if (conn->failed) |
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284 return -1; |
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285 |
10415 | 286 rcpt = p_new(proxy->pool, struct lmtp_proxy_recipient, 1); |
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287 rcpt->conn = conn; |
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288 rcpt->address = p_strdup(proxy->pool, address); |
10415 | 289 array_append(&proxy->rcpt_to, &rcpt, 1); |
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290 |
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291 lmtp_client_add_rcpt_params(conn->client, address, &set->params, |
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292 lmtp_proxy_conn_rcpt_to, |
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293 lmtp_proxy_conn_data, rcpt); |
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294 return 0; |
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295 } |
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296 |
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297 static void lmtp_proxy_conn_timeout(struct lmtp_proxy_connection *conn) |
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298 { |
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299 const char *line; |
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300 |
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301 line = t_strdup_printf(ERRSTR_TEMP_REMOTE_FAILURE |
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302 " (timeout while waiting for reply to %s) <%s>", |
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303 lmtp_client_state_to_string(conn->client), |
15005 | 304 conn->proxy->set.session_id); |
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305 lmtp_client_fail(conn->client, line); |
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306 } |
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307 |
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308 void lmtp_proxy_start(struct lmtp_proxy *proxy, struct istream *data_input, |
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309 lmtp_proxy_finish_callback_t *callback, void *context) |
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310 { |
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311 struct lmtp_proxy_connection *const *conns; |
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312 uoff_t size; |
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313 |
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314 i_assert(data_input->seekable); |
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315 i_assert(proxy->data_input == NULL); |
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316 |
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317 proxy->finish_callback = callback; |
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318 proxy->finish_context = context; |
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319 proxy->data_input = data_input; |
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320 i_stream_ref(proxy->data_input); |
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321 if (i_stream_get_size(proxy->data_input, TRUE, &size) < 0) { |
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322 i_error("i_stream_get_size(data_input) failed: %s", |
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323 i_stream_get_error(proxy->data_input)); |
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324 size = (uoff_t)-1; |
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325 } |
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326 |
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327 /* create the data_input streams first */ |
10406 | 328 array_foreach(&proxy->connections, conns) { |
329 struct lmtp_proxy_connection *conn = *conns; | |
330 | |
10415 | 331 if (conn->finished) { |
332 /* this connection had already failed */ | |
333 continue; | |
334 } | |
335 | |
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336 conn->to = timeout_add(proxy->max_timeout_msecs, |
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337 lmtp_proxy_conn_timeout, conn); |
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338 if (size == (uoff_t)-1) |
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339 conn->data_input = i_stream_create_limit(data_input, (uoff_t)-1); |
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340 else |
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341 conn->data_input = i_stream_create_sized(data_input, size); |
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342 } |
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343 /* now that all the streams are created, start reading them |
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344 (reading them earlier could have caused the data_input parent's |
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345 offset to change) */ |
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346 array_foreach(&proxy->connections, conns) { |
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347 struct lmtp_proxy_connection *conn = *conns; |
10415 | 348 |
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349 if (conn->data_input != NULL) { |
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350 lmtp_client_send(conn->client, conn->data_input); |
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351 lmtp_client_send_more(conn->client); |
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352 } |
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353 } |
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354 /* finish if all of the connections have already failed */ |
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355 lmtp_proxy_try_finish(proxy); |
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356 } |