Mercurial > dovecot > core-2.2

annotate src/auth/auth-postfix-connection.c @ 22614:cf66220d281e

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doveadm proxy: Don't crash if remote doesn't support log proxying
author Timo Sirainen <timo.sirainen@dovecot.fi>
date Sat, 14 Oct 2017 12:54:18 +0300
parents 2e2563132d5f
children cb108f786fb4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
21390
2e2563132d5f Updated copyright notices to include the year 2017.
Stephan Bosch <stephan.bosch@dovecot.fi>
parents: 19552
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1 /* Copyright (c) 2011-2017 Dovecot authors, see the included COPYING file */
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2
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3 #include "auth-common.h"
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4 #include "ioloop.h"
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5 #include "net.h"
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6 #include "istream.h"
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7 #include "ostream.h"
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8 #include "llist.h"
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9 #include "str.h"
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10 #include "strescape.h"
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11 #include "str-sanitize.h"
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12 #include "master-service.h"
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13 #include "userdb.h"
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14 #include "auth-postfix-connection.h"
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15
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16 #include <unistd.h>
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17
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18 #define MAX_INBUF_SIZE 1024
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19 #define MAX_OUTBUF_SIZE (1024*50)
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20
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21 struct auth_postfix_connection {
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22 struct auth_postfix_connection *prev, *next;
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23 struct auth *auth;
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24 int refcount;
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25
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26 int fd;
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27 char *path;
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28 struct istream *input;
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29 struct ostream *output;
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30 struct io *io;
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31
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32 unsigned int destroyed:1;
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33 };
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34
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35 static void postfix_input(struct auth_postfix_connection *conn);
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36 static void auth_postfix_connection_ref(struct auth_postfix_connection *conn);
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37 static void auth_postfix_connection_destroy(struct auth_postfix_connection **_conn);
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38 static void auth_postfix_connection_unref(struct auth_postfix_connection **_conn);
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39
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40 static struct auth_postfix_connection *auth_postfix_connections;
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41
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42 static int
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43 postfix_input_auth_request(struct auth_postfix_connection *conn,
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44 const char *username,
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45 struct auth_request **request_r, const char **error_r)
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46 {
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47 struct auth_request *auth_request;
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48
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49 auth_request = auth_request_new_dummy();
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50 auth_request->id = 1;
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51 auth_request->context = conn;
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52 auth_postfix_connection_ref(conn);
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53
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54 (void)auth_request_import_info(auth_request, "service", "postfix");
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55 auth_request_init(auth_request);
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56
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57 if (!auth_request_set_username(auth_request, username, error_r)) {
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58 *request_r = auth_request;
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59 return FALSE;
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60 }
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61 *request_r = auth_request;
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62 return TRUE;
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63 }
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64
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65 static void
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66 user_callback(enum userdb_result result, struct auth_request *auth_request)
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67 {
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68 struct auth_postfix_connection *conn = auth_request->context;
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69 string_t *str;
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70 const char *value;
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71
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72 if (auth_request->userdb_lookup_tempfailed)
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73 result = USERDB_RESULT_INTERNAL_FAILURE;
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74
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75 str = t_str_new(128);
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76 switch (result) {
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77 case USERDB_RESULT_INTERNAL_FAILURE:
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78 if (auth_request->userdb_lookup_tempfailed)
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79 value = auth_fields_find(auth_request->userdb_reply, "reason");
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80 else
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81 value = NULL;
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82 str_printfa(str, "400 %s",
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83 value != NULL ? value: "Internal failure");
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84 break;
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85 case USERDB_RESULT_USER_UNKNOWN:
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86 str_append(str, "500 User not found");
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87 break;
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88 case USERDB_RESULT_OK:
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89 str_append(str, "200 1");
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90 break;
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91 }
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92
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93 if (conn->auth->set->debug)
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94 i_debug("postfix out: %s", str_c(str));
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95
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96 str_append_c(str, '\n');
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97 o_stream_nsend(conn->output, str_data(str), str_len(str));
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98
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99 i_assert(conn->io == NULL);
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100 if (!conn->destroyed)
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101 conn->io = io_add(conn->fd, IO_READ, postfix_input, conn);
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102
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103 auth_request_unref(&auth_request);
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104 auth_postfix_connection_unref(&conn);
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105 }
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106
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107 static bool
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108 postfix_input_user(struct auth_postfix_connection *conn, const char *username)
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109 {
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110 struct auth_request *auth_request;
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111 const char *error;
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112
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113 io_remove(&conn->io);
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114 if (!postfix_input_auth_request(conn, username,
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115 &auth_request, &error)) {
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116 auth_request_log_info(auth_request, "postfix", "%s", error);
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117 user_callback(USERDB_RESULT_USER_UNKNOWN, auth_request);
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118 } else {
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119 auth_request_set_state(auth_request, AUTH_REQUEST_STATE_USERDB);
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120 auth_request_lookup_user(auth_request, user_callback);
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121 }
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122 return TRUE;
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123 }
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124
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125 static bool
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126 auth_postfix_input_line(struct auth_postfix_connection *conn, const char *line)
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127 {
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128 if (conn->auth->set->debug)
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129 i_debug("postfix in: %s", line);
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130
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
131 if (strncasecmp(line, "get ", 4) == 0)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
132 return postfix_input_user(conn, line + 4);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
133
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
134 i_error("BUG: Unknown command in postfix socket: %s",
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
135 str_sanitize(line, 80));
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
136 return FALSE;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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137 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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138
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
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139 static void postfix_input(struct auth_postfix_connection *conn)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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140 {
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141 char *line;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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142 bool ret;
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143
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144 switch (i_stream_read(conn->input)) {
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parents:
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145 case 0:
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146 return;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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147 case -1:
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148 /* disconnected */
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149 auth_postfix_connection_destroy(&conn);
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150 return;
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parents:
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151 case -2:
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152 /* buffer full */
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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153 i_error("BUG: Postfix sent us more than %d bytes",
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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154 (int)MAX_INBUF_SIZE);
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Timo Sirainen <tss@iki.fi>
parents:
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155 auth_postfix_connection_destroy(&conn);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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156 return;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
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157 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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158
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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159 while ((line = i_stream_next_line(conn->input)) != NULL) {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
160 T_BEGIN {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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161 ret = auth_postfix_input_line(conn, line);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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162 } T_END;
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parents:
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163 if (!ret) {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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164 auth_postfix_connection_destroy(&conn);
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165 return;
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parents:
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166 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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167 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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168 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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169
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Timo Sirainen <tss@iki.fi>
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170 struct auth_postfix_connection *
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Timo Sirainen <tss@iki.fi>
parents:
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171 auth_postfix_connection_create(struct auth *auth, int fd)
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parents:
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172 {
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173 struct auth_postfix_connection *conn;
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174
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175 conn = i_new(struct auth_postfix_connection, 1);
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176 conn->refcount = 1;
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Timo Sirainen <tss@iki.fi>
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177 conn->fd = fd;
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178 conn->auth = auth;
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179 conn->input = i_stream_create_fd(fd, MAX_INBUF_SIZE, FALSE);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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180 conn->output = o_stream_create_fd(fd, (size_t)-1, FALSE);
14681
ca37d1577291 Added o_stream_nsend*() and related functions to make delayed error handling safer.
Timo Sirainen <tss@iki.fi>
parents: 14133
diff changeset
181 o_stream_set_no_error_handling(conn->output, TRUE);
13912
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Timo Sirainen <tss@iki.fi>
parents:
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182 conn->io = io_add(fd, IO_READ, postfix_input, conn);
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parents:
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183 DLLIST_PREPEND(&auth_postfix_connections, conn);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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184 return conn;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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185 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
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186
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187 static void
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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188 auth_postfix_connection_destroy(struct auth_postfix_connection **_conn)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
189 {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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190 struct auth_postfix_connection *conn = *_conn;
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parents:
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191
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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192 *_conn = NULL;
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
193 if (conn->destroyed)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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194 return;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
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195 conn->destroyed = TRUE;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
196
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
197 DLLIST_REMOVE(&auth_postfix_connections, conn);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
diff changeset
198
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
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parents:
diff changeset
199 if (conn->input != NULL)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
200 i_stream_close(conn->input);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
201 if (conn->output != NULL)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
202 o_stream_close(conn->output);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
203 if (conn->io != NULL)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
204 io_remove(&conn->io);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
205 if (conn->fd != -1) {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
206 if (close(conn->fd) < 0)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
207 i_error("close(%s): %m", conn->path);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
208 conn->fd = -1;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
209 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
210
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
211 master_service_client_connection_destroyed(master_service);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
212 auth_postfix_connection_unref(&conn);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
213 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
214
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
215 static void auth_postfix_connection_ref(struct auth_postfix_connection *conn)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
216 {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
217 i_assert(conn->refcount > 0);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
218
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
219 conn->refcount++;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
220 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
221
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
222 static void
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
223 auth_postfix_connection_unref(struct auth_postfix_connection **_conn)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
224 {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
225 struct auth_postfix_connection *conn = *_conn;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
226
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
227 *_conn = NULL;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
228 i_assert(conn->refcount > 0);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
229
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
230 if (--conn->refcount > 0)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
231 return;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
232
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
233 if (conn->input != NULL)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
234 i_stream_unref(&conn->input);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
235 if (conn->output != NULL)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
236 o_stream_unref(&conn->output);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
237 i_free(conn);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
238 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
239
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
240 void auth_postfix_connections_destroy_all(void)
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
241 {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
242 struct auth_postfix_connection *conn;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
243
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
244 while (auth_postfix_connections != NULL) {
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
245 conn = auth_postfix_connections;
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
246 auth_postfix_connection_destroy(&conn);
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
247 }
f562bcaca215 auth: Implemented support for Postfix's "TCP map" sockets for user existence lookups.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
248 }