Mercurial > dovecot > core-2.2

annotate src/pop3-login/pop3-proxy.c @ 4907:5b4c9b20eba0 HEAD

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Replaced void *context from a lot of callbacks with the actual context type. Also added/fixed some context type checks.
author Timo Sirainen <tss@iki.fi>
date Fri, 15 Dec 2006 20:38:08 +0200
parents 32e2b35e3aac
children f2cc68a3a198
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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d344be0bb70f Added IMAP and POP3 proxying support.
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1 /* Copyright (C) 2004 Timo Sirainen */
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2
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3 #include "common.h"
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4 #include "ioloop.h"
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5 #include "istream.h"
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6 #include "ostream.h"
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7 #include "base64.h"
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8 #include "safe-memset.h"
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9 #include "str.h"
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10 #include "client.h"
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11 #include "pop3-proxy.h"
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12
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13 static void proxy_input(struct istream *input, struct ostream *output,
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5b4c9b20eba0 Replaced void *context from a lot of callbacks with the actual context
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14 struct pop3_client *client)
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15 {
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16 string_t *str;
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17 const char *line;
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18
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19 i_assert(!client->destroyed);
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20
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21 if (input == NULL) {
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22 if (client->io != NULL) {
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23 /* remote authentication failed, we're just
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24 freeing the proxy */
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25 return;
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26 }
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27
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28 /* failed for some reason, probably server disconnected */
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29 client_send_line(client,
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30 "-ERR [IN-USE] Temporary login failure.");
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31 client_destroy(client, NULL);
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32 return;
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33 }
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34
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35 switch (i_stream_read(input)) {
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36 case -2:
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37 /* buffer full */
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38 i_error("pop-proxy(%s): Remote input buffer full",
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39 client->common.virtual_user);
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40 client_destroy_internal_failure(client);
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41 return;
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42 case -1:
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43 /* disconnected */
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44 client_destroy(client, "Proxy: Remote disconnected");
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45 return;
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46 }
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47
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48 line = i_stream_next_line(input);
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49 if (line == NULL)
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50 return;
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51
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52 switch (client->proxy_state) {
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53 case 0:
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54 /* this is a banner */
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55 if (strncmp(line, "+OK", 3) != 0) {
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56 i_error("pop3-proxy(%s): "
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57 "Remote returned invalid banner: %s",
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58 client->common.virtual_user, line);
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59 client_destroy_internal_failure(client);
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60 return;
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61 }
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62
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63 /* send USER command */
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64 str = t_str_new(128);
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65 str_append(str, "USER ");
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66 str_append(str, client->proxy_user);
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67 str_append(str, "\r\n");
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68 (void)o_stream_send(output, str_data(str), str_len(str));
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69
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70 client->proxy_state++;
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71 return;
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72 case 1:
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73 if (strncmp(line, "+OK", 3) != 0)
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74 break;
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75
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76 /* USER successful, send PASS */
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77 str = t_str_new(128);
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78 str_append(str, "PASS ");
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79 str_append(str, client->proxy_password);
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80 str_append(str, "\r\n");
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81 (void)o_stream_send(output, str_data(str),
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82 str_len(str));
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83
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84 safe_memset(client->proxy_password, 0,
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85 strlen(client->proxy_password));
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86 i_free(client->proxy_password);
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87 client->proxy_password = NULL;
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88
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89 client->proxy_state++;
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90 return;
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91 case 2:
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92 if (strncmp(line, "+OK", 3) != 0)
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93 break;
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94
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95 /* Login successful. Send this line to client. */
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96 (void)o_stream_send_str(client->output, line);
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97 (void)o_stream_send(client->output, "\r\n", 2);
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98
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99 login_proxy_detach(client->proxy, client->input,
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100 client->output);
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101
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102 client->proxy = NULL;
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103 client->input = NULL;
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104 client->output = NULL;
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105 client->common.fd = -1;
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106 client_destroy(client,
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107 t_strdup_printf("proxy(%s): started",
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108 client->common.virtual_user));
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109 return;
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110 }
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111
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112 /* Login failed. Send our own failure reply so client can't
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113 figure out if user exists or not just by looking at the
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114 reply string. */
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115 client_send_line(client, "-ERR "AUTH_FAILED_MSG);
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116
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117 /* allow client input again */
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118 i_assert(client->io == NULL);
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119 client->io = io_add(client->common.fd, IO_READ,
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120 client_input, client);
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121
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122 login_proxy_free(client->proxy);
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123 client->proxy = NULL;
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124
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125 if (client->proxy_password != NULL) {
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126 safe_memset(client->proxy_password, 0,
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127 strlen(client->proxy_password));
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128 i_free(client->proxy_password);
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129 client->proxy_password = NULL;
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130 }
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131
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132 i_free(client->proxy_user);
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133 client->proxy_user = NULL;
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134 }
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135
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136 int pop3_proxy_new(struct pop3_client *client, const char *host,
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137 unsigned int port, const char *user, const char *password)
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138 {
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139 i_assert(user != NULL);
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140 i_assert(!client->destroyed);
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141
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142 if (password == NULL) {
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143 i_error("proxy(%s): password not given",
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144 client->common.virtual_user);
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145 return -1;
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146 }
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147
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148 i_assert(client->refcount > 1);
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149 connection_queue_add(1);
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150
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151 if (client->destroyed) {
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152 /* connection_queue_add() decided that we were the oldest
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153 connection and killed us. */
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154 return -1;
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155 }
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156
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157 client->proxy = login_proxy_new(&client->common, host, port,
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158 proxy_input, client);
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159 if (client->proxy == NULL)
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160 return -1;
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161
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162 client->proxy_state = 0;
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163 client->proxy_user = i_strdup(user);
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164 client->proxy_password = i_strdup(password);
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165
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166 /* disable input until authentication is finished */
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167 if (client->io != NULL)
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168 io_remove(&client->io);
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169 return 0;
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170 }