Mercurial > dovecot > core-2.2

annotate src/director/login-connection.c @ 11326:fc94106ca7e9 HEAD

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director: If we need to send a failure reply to login process, make it a temp failure.
author Timo Sirainen <tss@iki.fi>
date Wed, 19 May 2010 12:45:54 +0200
parents 2a5336ad86cd
children c82a7922fca9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11321
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1 /* Copyright (c) 2010 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 "ioloop.h"
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5 #include "network.h"
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6 #include "ostream.h"
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7 #include "llist.h"
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8 #include "director.h"
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9 #include "director-request.h"
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10 #include "auth-connection.h"
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11 #include "login-connection.h"
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12
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13 #include <unistd.h>
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14
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15 struct login_connection {
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16 struct login_connection *prev, *next;
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17
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18 int refcount;
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19
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20 int fd;
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21 struct io *io;
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22 struct ostream *output;
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23 struct auth_connection *auth;
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24 struct director *dir;
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25
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26 unsigned int destroyed:1;
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27 };
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28
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29 struct login_host_request {
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30 struct login_connection *conn;
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31 char *line;
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32 };
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33
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34 static struct login_connection *login_connections;
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35
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36 static void login_connection_unref(struct login_connection **_conn);
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37
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38 static void login_connection_input(struct login_connection *conn)
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39 {
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40 unsigned char buf[4096];
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41 ssize_t ret;
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42
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43 ret = read(conn->fd, buf, sizeof(buf));
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44 if (ret <= 0) {
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45 if (ret < 0) {
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46 if (errno == EAGAIN)
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47 return;
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48 i_error("read(login connection) failed: %m");
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49 }
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50 login_connection_deinit(&conn);
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51 return;
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52 }
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53 auth_connection_send(conn->auth, buf, ret);
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54 }
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55
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56 static void
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57 login_connection_send_line(struct login_connection *conn, const char *line)
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58 {
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59 struct const_iovec iov[2];
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60
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61 if (conn->destroyed)
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62 return;
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63
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64 iov[0].iov_base = line;
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65 iov[0].iov_len = strlen(line);
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66 iov[1].iov_base = "\n";
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67 iov[1].iov_len = 1;
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68 (void)o_stream_sendv(conn->output, iov, N_ELEMENTS(iov));
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69 }
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70
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71 static void login_host_callback(const struct ip_addr *ip, void *context)
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72 {
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73 struct login_host_request *request = context;
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74 struct director *dir = request->conn->dir;
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75 const char *line;
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76 unsigned int secs;
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77
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78 T_BEGIN {
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79 if (ip != NULL) {
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80 secs = dir->set->director_user_expire / 2;
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81 line = t_strdup_printf("%s\thost=%s\tproxy_refresh=%u",
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82 request->line, net_ip2addr(ip),
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83 secs);
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84 } else {
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85 i_assert(strncmp(request->line, "OK\t", 3) == 0);
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86 line = t_strconcat("FAIL\t",
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87 t_strcut(request->line + 3, '\t'),
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88 "\ttemp", NULL);
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89 }
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90 login_connection_send_line(request->conn, line);
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91 } T_END;
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92
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93 login_connection_unref(&request->conn);
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94 i_free(request->line);
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95 i_free(request);
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96 }
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97
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98 static void auth_input_line(const char *line, void *context)
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99 {
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100 struct login_connection *conn = context;
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101 struct login_host_request *request;
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102 const char *const *args, *username = NULL;
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103 bool proxy = FALSE, host = FALSE;
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104
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105 if (line == NULL) {
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106 /* auth connection died -> kill also this login connection */
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107 login_connection_deinit(&conn);
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108 return;
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109 }
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110 if (strncmp(line, "OK\t", 3) != 0) {
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111 login_connection_send_line(conn, line);
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112 return;
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113 }
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114
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115 /* OK <id> [<parameters>] */
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116 args = t_strsplit(line + 3, "\t");
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117 if (*args != NULL) {
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118 /* we should always get here, but in case we don't just
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119 forward as-is and let login process handle the error. */
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120 args++;
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121 }
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122
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123 for (; *args != NULL; args++) {
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124 if (strncmp(*args, "proxy", 5) == 0 &&
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125 ((*args)[5] == '=' || (*args)[5] == '\0'))
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126 proxy = TRUE;
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127 else if (strncmp(*args, "host=", 5) == 0)
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128 host = TRUE;
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129 else if (strncmp(*args, "destuser=", 9) == 0)
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130 username = *args + 9;
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131 else if (strncmp(*args, "user=", 5) == 0) {
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132 if (username == NULL)
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133 username = *args + 5;
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134 }
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135 }
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136 if (*conn->dir->set->master_user_separator != '\0') {
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137 /* with master user logins we still want to use only the
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138 login username */
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139 username = t_strcut(username,
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140 *conn->dir->set->master_user_separator);
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141 }
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142
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143 if (!proxy || host || username == NULL) {
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144 login_connection_send_line(conn, line);
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145 return;
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146 }
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147
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148 /* we need to add the host. the lookup might be asynchronous */
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149 request = i_new(struct login_host_request, 1);
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150 request->conn = conn;
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151 request->line = i_strdup(line);
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152
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153 conn->refcount++;
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154 director_request(conn->dir, username, login_host_callback, request);
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155 }
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156
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157 struct login_connection *
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158 login_connection_init(struct director *dir, int fd,
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159 struct auth_connection *auth)
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160 {
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161 struct login_connection *conn;
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162
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163 conn = i_new(struct login_connection, 1);
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164 conn->refcount = 1;
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165 conn->fd = fd;
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166 conn->auth = auth;
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167 conn->dir = dir;
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168 conn->output = o_stream_create_fd(conn->fd, (size_t)-1, FALSE);
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169 conn->io = io_add(conn->fd, IO_READ, login_connection_input, conn);
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170
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171 auth_connection_set_callback(conn->auth, auth_input_line, conn);
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172 DLLIST_PREPEND(&login_connections, conn);
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173 return conn;
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174 }
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175
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176 void login_connection_deinit(struct login_connection **_conn)
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177 {
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178 struct login_connection *conn = *_conn;
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179
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180 *_conn = NULL;
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181
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182 if (conn->destroyed)
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183 return;
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184 conn->destroyed = TRUE;
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185
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186 DLLIST_REMOVE(&login_connections, conn);
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187 io_remove(&conn->io);
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188 o_stream_unref(&conn->output);
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189 if (close(conn->fd) < 0)
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190 i_error("close(login connection) failed: %m");
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191 conn->fd = -1;
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192
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193 auth_connection_deinit(&conn->auth);
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194 login_connection_unref(&conn);
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195 }
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196
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197 static void login_connection_unref(struct login_connection **_conn)
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198 {
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199 struct login_connection *conn = *_conn;
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200
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201 *_conn = NULL;
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202
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203 i_assert(conn->refcount > 0);
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204 if (--conn->refcount == 0)
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205 i_free(conn);
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206 }
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207
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208 void login_connections_deinit(void)
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209 {
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210 while (login_connections != NULL) {
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211 struct login_connection *conn = login_connections;
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212
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213 login_connection_deinit(&conn);
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214 }
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215 }