Mercurial > dovecot > core-2.2

annotate src/director/auth-connection.c @ 14681:ca37d1577291

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Added o_stream_nsend*() and related functions to make delayed error handling safer. Once o_stream_nsend*() is called, o_stream_nfinish() must be called before stream is destroyed to finish checking if there were any errors. If something failed and the stream is just wanted to be closed, o_stream_ignore_last_errors() can be called. For streams where errors don't really make any difference (network sockets) you can call o_stream_set_no_error_handling() immediately after creating the stream.
author Timo Sirainen <tss@iki.fi>
date Mon, 25 Jun 2012 00:01:59 +0300
parents ba770cba5598
children 02451e967a06
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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ba770cba5598 Updated copyright notices to include year 2012.
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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 "istream.h"
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6 #include "ostream.h"
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7 #include "network.h"
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8 #include "llist.h"
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9 #include "safe-memset.h"
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10 #include "auth-client-interface.h"
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11 #include "auth-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 auth_connection {
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16 struct auth_connection *prev, *next;
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17
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18 char *path;
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19 int fd;
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20 struct io *io;
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21 struct istream *input;
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22 struct ostream *output;
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23
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24 auth_input_callback *callback;
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25 void *context;
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26 };
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27
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28 static struct auth_connection *auth_connections;
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29
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30 static void auth_connection_disconnected(struct auth_connection **conn);
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31
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32 static void auth_connection_input(struct auth_connection *conn)
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33 {
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34 char *line;
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35
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36 switch (i_stream_read(conn->input)) {
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37 case 0:
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38 return;
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39 case -1:
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40 /* disconnected */
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41 i_error("Auth server disconnected unexpectedly");
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42 auth_connection_disconnected(&conn);
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43 return;
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44 case -2:
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45 /* buffer full */
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46 i_error("BUG: Auth server sent us more than %d bytes",
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47 (int)AUTH_CLIENT_MAX_LINE_LENGTH);
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48 auth_connection_disconnected(&conn);
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49 return;
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50 }
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51
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52 while ((line = i_stream_next_line(conn->input)) != NULL) {
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53 T_BEGIN {
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54 conn->callback(line, conn->context);
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55 safe_memset(line, 0, strlen(line));
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56 } T_END;
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57 }
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58 }
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59
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60 struct auth_connection *auth_connection_init(const char *path)
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61 {
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62 struct auth_connection *conn;
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63
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64 conn = i_new(struct auth_connection, 1);
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65 conn->fd = -1;
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66 conn->path = i_strdup(path);
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67 DLLIST_PREPEND(&auth_connections, conn);
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68 return conn;
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69 }
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70
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71 void auth_connection_set_callback(struct auth_connection *conn,
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72 auth_input_callback *callback, void *context)
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73 {
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74 conn->callback = callback;
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75 conn->context = context;
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76 }
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77
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78 int auth_connection_connect(struct auth_connection *conn)
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79 {
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80 i_assert(conn->fd == -1);
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81
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82 conn->fd = net_connect_unix_with_retries(conn->path, 1000);
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83 if (conn->fd == -1) {
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84 i_error("connect(%s) failed: %m", conn->path);
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85 return -1;
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86 }
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87
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88 conn->input = i_stream_create_fd(conn->fd, AUTH_CLIENT_MAX_LINE_LENGTH,
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89 FALSE);
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90 conn->output = o_stream_create_fd(conn->fd, (size_t)-1, FALSE);
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91 o_stream_set_no_error_handling(conn->output, TRUE);
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92 conn->io = io_add(conn->fd, IO_READ, auth_connection_input, conn);
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93 return 0;
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94 }
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95
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96 void auth_connection_deinit(struct auth_connection **_conn)
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97 {
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98 struct auth_connection *conn = *_conn;
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99
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100 *_conn = NULL;
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101
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102 DLLIST_REMOVE(&auth_connections, conn);
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103 if (conn->fd != -1) {
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104 io_remove(&conn->io);
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105 i_stream_unref(&conn->input);
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106 o_stream_unref(&conn->output);
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107
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108 if (close(conn->fd) < 0)
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109 i_error("close(auth connection) failed: %m");
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110 }
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111 i_free(conn->path);
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112 i_free(conn);
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113 }
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114
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115 static void auth_connection_disconnected(struct auth_connection **_conn)
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116 {
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117 struct auth_connection *conn = *_conn;
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118
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119 *_conn = NULL;
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120 /* notify callback. it should deinit this connection */
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121 conn->callback(NULL, conn->context);
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122 }
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123
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124 void auth_connection_send(struct auth_connection *conn,
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125 const void *data, size_t size)
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126 {
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127 i_assert(conn->fd != -1);
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128
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129 o_stream_nsend(conn->output, data, size);
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130 }
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131
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132 void auth_connections_deinit(void)
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133 {
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134 while (auth_connections != NULL) {
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135 struct auth_connection *conn = auth_connections;
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136
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137 auth_connection_disconnected(&conn);
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138 }
5f350b5ff6d9 Added initial implementation of a director process (for NFS users).
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
139 }