Mercurial > dovecot > core-2.2
annotate src/director/login-connection.c @ 11325:2a5336ad86cd HEAD
director: Tell login proxy to notify director of open connections every director_user_expire/2 secs.
author | Timo Sirainen <tss@iki.fi> |
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date | Wed, 19 May 2010 12:23:32 +0200 |
parents | 5f350b5ff6d9 |
children | fc94106ca7e9 |
rev | line source |
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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 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 } |