Mercurial > dovecot > core-2.2

annotate src/director/login-connection.c @ 11321:5f350b5ff6d9 HEAD

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Added initial implementation of a director process (for NFS users). There are still some unimplemented features and bugs. Also changing mail server list doesn't yet make sure that other directors won't assign the same user to a different server at the same time.
author Timo Sirainen <tss@iki.fi>
date Wed, 19 May 2010 09:56:49 +0200
parents
children 2a5336ad86cd
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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 const char *line;
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75
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76 T_BEGIN {
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77 if (ip != NULL) {
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78 line = t_strconcat(request->line, "\thost=",
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79 net_ip2addr(ip), NULL);
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80 } else {
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81 i_assert(strncmp(request->line, "OK\t", 3) == 0);
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82 line = t_strconcat("FAIL\t",
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83 t_strcut(request->line + 3, '\t'),
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84 NULL);
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85 }
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86 login_connection_send_line(request->conn, line);
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87 } T_END;
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88
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89 login_connection_unref(&request->conn);
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90 i_free(request->line);
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91 i_free(request);
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92 }
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93
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94 static void auth_input_line(const char *line, void *context)
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95 {
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96 struct login_connection *conn = context;
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97 struct login_host_request *request;
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98 const char *const *args, *username = NULL;
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99 bool proxy = FALSE, host = FALSE;
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100
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101 if (line == NULL) {
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102 /* auth connection died -> kill also this login connection */
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103 login_connection_deinit(&conn);
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104 return;
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105 }
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106 if (strncmp(line, "OK\t", 3) != 0) {
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107 login_connection_send_line(conn, line);
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108 return;
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109 }
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110
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111 /* OK <id> [<parameters>] */
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112 args = t_strsplit(line + 3, "\t");
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113 if (*args != NULL) {
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114 /* we should always get here, but in case we don't just
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115 forward as-is and let login process handle the error. */
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116 args++;
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117 }
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118
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119 for (; *args != NULL; args++) {
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120 if (strncmp(*args, "proxy", 5) == 0 &&
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121 ((*args)[5] == '=' || (*args)[5] == '\0'))
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122 proxy = TRUE;
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123 else if (strncmp(*args, "host=", 5) == 0)
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124 host = TRUE;
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125 else if (strncmp(*args, "destuser=", 9) == 0)
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126 username = *args + 9;
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127 else if (strncmp(*args, "user=", 5) == 0) {
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128 if (username == NULL)
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129 username = *args + 5;
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130 }
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131 }
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132 if (*conn->dir->set->master_user_separator != '\0') {
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133 /* with master user logins we still want to use only the
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134 login username */
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135 username = t_strcut(username,
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136 *conn->dir->set->master_user_separator);
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137 }
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138
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139 if (!proxy || host || username == NULL) {
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140 login_connection_send_line(conn, line);
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141 return;
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142 }
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143
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144 /* we need to add the host. the lookup might be asynchronous */
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145 request = i_new(struct login_host_request, 1);
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146 request->conn = conn;
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147 request->line = i_strdup(line);
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148
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149 conn->refcount++;
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150 director_request(conn->dir, username, login_host_callback, request);
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151 }
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152
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153 struct login_connection *
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154 login_connection_init(struct director *dir, int fd,
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155 struct auth_connection *auth)
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156 {
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157 struct login_connection *conn;
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158
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159 conn = i_new(struct login_connection, 1);
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160 conn->refcount = 1;
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161 conn->fd = fd;
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162 conn->auth = auth;
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163 conn->dir = dir;
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164 conn->output = o_stream_create_fd(conn->fd, (size_t)-1, FALSE);
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165 conn->io = io_add(conn->fd, IO_READ, login_connection_input, conn);
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166
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167 auth_connection_set_callback(conn->auth, auth_input_line, conn);
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168 DLLIST_PREPEND(&login_connections, conn);
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169 return conn;
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170 }
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171
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172 void login_connection_deinit(struct login_connection **_conn)
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173 {
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174 struct login_connection *conn = *_conn;
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175
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176 *_conn = NULL;
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177
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178 if (conn->destroyed)
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179 return;
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180 conn->destroyed = TRUE;
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181
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182 DLLIST_REMOVE(&login_connections, conn);
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183 io_remove(&conn->io);
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184 o_stream_unref(&conn->output);
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185 if (close(conn->fd) < 0)
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186 i_error("close(login connection) failed: %m");
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187 conn->fd = -1;
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188
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189 auth_connection_deinit(&conn->auth);
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190 login_connection_unref(&conn);
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191 }
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192
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193 static void login_connection_unref(struct login_connection **_conn)
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194 {
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195 struct login_connection *conn = *_conn;
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196
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197 *_conn = NULL;
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198
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199 i_assert(conn->refcount > 0);
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200 if (--conn->refcount == 0)
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201 i_free(conn);
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202 }
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203
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204 void login_connections_deinit(void)
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205 {
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206 while (login_connections != NULL) {
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207 struct login_connection *conn = login_connections;
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208
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209 login_connection_deinit(&conn);
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210 }
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211 }