Mercurial > dovecot > core-2.2
annotate src/director/login-connection.c @ 14471:fc8031c5e691
Use t_strsplit_tab() wherever possible
author | Timo Sirainen <tss@iki.fi> |
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date | Thu, 19 Apr 2012 23:06:55 +0300 |
parents | ba770cba5598 |
children | ca37d1577291 |
rev | line source |
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1 /* Copyright (c) 2010-2012 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 "master-service.h" |
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9 #include "director.h" |
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10 #include "director-request.h" |
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11 #include "auth-connection.h" |
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12 #include "login-connection.h" |
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13 |
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14 #include <unistd.h> |
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15 |
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16 struct login_connection { |
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17 struct login_connection *prev, *next; |
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18 |
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19 int refcount; |
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20 |
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21 int fd; |
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22 struct io *io; |
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23 struct ostream *output; |
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24 struct auth_connection *auth; |
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25 struct director *dir; |
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26 |
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27 unsigned int destroyed:1; |
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28 unsigned int userdb:1; |
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29 }; |
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30 |
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31 struct login_host_request { |
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32 struct login_connection *conn; |
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33 char *line, *username; |
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34 }; |
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35 |
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36 static struct login_connection *login_connections; |
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37 |
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38 static void login_connection_unref(struct login_connection **_conn); |
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39 |
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40 static void login_connection_input(struct login_connection *conn) |
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41 { |
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42 unsigned char buf[4096]; |
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43 ssize_t ret; |
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44 |
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45 ret = read(conn->fd, buf, sizeof(buf)); |
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46 if (ret <= 0) { |
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47 if (ret < 0) { |
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48 if (errno == EAGAIN) |
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49 return; |
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50 i_error("read(login connection) failed: %m"); |
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51 } |
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52 login_connection_deinit(&conn); |
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53 return; |
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54 } |
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55 auth_connection_send(conn->auth, buf, ret); |
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56 } |
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57 |
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58 static void |
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59 login_connection_send_line(struct login_connection *conn, const char *line) |
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60 { |
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61 struct const_iovec iov[2]; |
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62 |
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63 if (conn->destroyed) |
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64 return; |
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65 |
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66 iov[0].iov_base = line; |
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67 iov[0].iov_len = strlen(line); |
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68 iov[1].iov_base = "\n"; |
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69 iov[1].iov_len = 1; |
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70 (void)o_stream_sendv(conn->output, iov, N_ELEMENTS(iov)); |
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71 } |
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72 |
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73 static void |
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74 login_host_callback(const struct ip_addr *ip, const char *errormsg, |
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75 void *context) |
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76 { |
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77 struct login_host_request *request = context; |
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78 struct director *dir = request->conn->dir; |
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79 const char *line; |
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80 unsigned int secs; |
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81 |
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82 if (ip != NULL) { |
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83 secs = dir->set->director_user_expire / 2; |
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84 line = t_strdup_printf("%s\thost=%s\tproxy_refresh=%u", |
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85 request->line, net_ip2addr(ip), secs); |
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86 } else { |
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87 i_assert(strncmp(request->line, "OK\t", 3) == 0); |
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88 |
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89 i_error("director: User %s host lookup failed: %s", |
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90 request->username, errormsg); |
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91 line = t_strconcat("FAIL\t", t_strcut(request->line + 3, '\t'), |
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92 "\ttemp", NULL); |
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93 } |
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94 login_connection_send_line(request->conn, line); |
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95 |
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96 login_connection_unref(&request->conn); |
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97 i_free(request->username); |
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98 i_free(request->line); |
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99 i_free(request); |
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100 } |
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101 |
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102 static void auth_input_line(const char *line, void *context) |
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103 { |
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104 struct login_connection *conn = context; |
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105 struct login_host_request *request; |
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106 const char *const *args, *line_params, *username = NULL; |
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107 bool proxy = FALSE, host = FALSE; |
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108 |
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109 if (line == NULL) { |
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110 /* auth connection died -> kill also this login connection */ |
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111 login_connection_deinit(&conn); |
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112 return; |
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113 } |
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114 if (!conn->userdb && strncmp(line, "OK\t", 3) == 0) |
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115 line_params = line + 3; |
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116 else if (conn->userdb && strncmp(line, "PASS\t", 5) == 0) |
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117 line_params = line + 5; |
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118 else { |
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119 login_connection_send_line(conn, line); |
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120 return; |
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121 } |
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122 |
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123 /* OK <id> [<parameters>] */ |
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124 args = t_strsplit_tab(line_params); |
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125 if (*args != NULL) { |
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126 /* we should always get here, but in case we don't just |
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127 forward as-is and let login process handle the error. */ |
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128 args++; |
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129 } |
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130 |
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131 for (; *args != NULL; args++) { |
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132 if (strncmp(*args, "proxy", 5) == 0 && |
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133 ((*args)[5] == '=' || (*args)[5] == '\0')) |
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134 proxy = TRUE; |
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135 else if (strncmp(*args, "host=", 5) == 0) |
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136 host = TRUE; |
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137 else if (strncmp(*args, "destuser=", 9) == 0) |
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138 username = *args + 9; |
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139 else if (strncmp(*args, "user=", 5) == 0) { |
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140 if (username == NULL) |
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141 username = *args + 5; |
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142 } |
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143 } |
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144 if (*conn->dir->set->master_user_separator != '\0') { |
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145 /* with master user logins we still want to use only the |
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146 login username */ |
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147 username = t_strcut(username, |
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148 *conn->dir->set->master_user_separator); |
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149 } |
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150 |
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151 if (!proxy || host || username == NULL) { |
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152 login_connection_send_line(conn, line); |
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153 return; |
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154 } |
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155 |
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156 /* we need to add the host. the lookup might be asynchronous */ |
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157 request = i_new(struct login_host_request, 1); |
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158 request->conn = conn; |
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159 request->line = i_strdup(line); |
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160 request->username = i_strdup(username); |
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161 |
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162 conn->refcount++; |
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163 director_request(conn->dir, username, login_host_callback, request); |
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164 } |
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165 |
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166 struct login_connection * |
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167 login_connection_init(struct director *dir, int fd, |
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168 struct auth_connection *auth, bool userdb) |
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169 { |
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170 struct login_connection *conn; |
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171 |
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172 conn = i_new(struct login_connection, 1); |
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173 conn->refcount = 1; |
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174 conn->fd = fd; |
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175 conn->auth = auth; |
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176 conn->dir = dir; |
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177 conn->output = o_stream_create_fd(conn->fd, (size_t)-1, FALSE); |
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178 conn->io = io_add(conn->fd, IO_READ, login_connection_input, conn); |
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179 conn->userdb = userdb; |
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180 |
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181 auth_connection_set_callback(conn->auth, auth_input_line, conn); |
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182 DLLIST_PREPEND(&login_connections, conn); |
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183 return conn; |
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184 } |
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185 |
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186 void login_connection_deinit(struct login_connection **_conn) |
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187 { |
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188 struct login_connection *conn = *_conn; |
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189 |
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190 *_conn = NULL; |
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191 |
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192 if (conn->destroyed) |
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193 return; |
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194 conn->destroyed = TRUE; |
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195 |
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196 DLLIST_REMOVE(&login_connections, conn); |
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197 io_remove(&conn->io); |
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198 o_stream_unref(&conn->output); |
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199 if (close(conn->fd) < 0) |
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200 i_error("close(login connection) failed: %m"); |
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201 conn->fd = -1; |
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202 |
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203 auth_connection_deinit(&conn->auth); |
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204 login_connection_unref(&conn); |
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205 |
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206 master_service_client_connection_destroyed(master_service); |
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207 } |
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208 |
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209 static void login_connection_unref(struct login_connection **_conn) |
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210 { |
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211 struct login_connection *conn = *_conn; |
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212 |
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213 *_conn = NULL; |
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214 |
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215 i_assert(conn->refcount > 0); |
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216 if (--conn->refcount == 0) |
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217 i_free(conn); |
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218 } |
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219 |
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220 void login_connections_deinit(void) |
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221 { |
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222 while (login_connections != NULL) { |
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223 struct login_connection *conn = login_connections; |
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224 |
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225 login_connection_deinit(&conn); |
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226 } |
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227 } |