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428
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1 /* pop.c: client routines for talking to a POP3-protocol post-office server
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2 Copyright (c) 1991, 1993, 1996 Free Software Foundation, Inc.
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3 Written by Jonathan Kamens, jik@security.ov.com.
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4
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5 This file is part of GNU Emacs.
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6
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7 GNU Emacs is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 2, or (at your option)
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10 any later version.
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11
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12 GNU Emacs is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GNU Emacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 #ifdef HAVE_CONFIG_H
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23 #define NO_SHORTNAMES /* Tell config not to load remap.h */
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442
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24 #define DONT_ENCAPSULATE
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438
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25 #include <config.h>
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428
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26 #else
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27 #define MAIL_USE_POP
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28 #endif
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29
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30 #ifdef MAIL_USE_POP
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31
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32 #include <sys/types.h>
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442
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33 #ifdef WIN32_NATIVE
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428
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34 #include <winsock.h>
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35 #undef SOCKET_ERROR
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36 #define RECV(s,buf,len,flags) recv(s,buf,len,flags)
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37 #define SEND(s,buf,len,flags) send(s,buf,len,flags)
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38 #define CLOSESOCKET(s) closesocket(s)
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39 #else
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40 #include <netinet/in.h>
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41 #include <sys/socket.h>
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42 #define RECV(s,buf,len,flags) read(s,buf,len)
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43 #define SEND(s,buf,len,flags) write(s,buf,len)
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44 #define CLOSESOCKET(s) close(s)
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45 #endif
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46 #include "pop.h"
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47
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48 #ifdef sun
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49 #include <malloc.h>
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50 #endif /* sun */
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51
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52 #ifdef HESIOD
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53 #include <hesiod.h>
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54 /*
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55 * It really shouldn't be necessary to put this declaration here, but
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56 * the version of hesiod.h that Athena has installed in release 7.2
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57 * doesn't declare this function; I don't know if the 7.3 version of
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58 * hesiod.h does.
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59 */
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60 extern struct servent *hes_getservbyname (/* char *, char * */);
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61 #endif
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62
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442
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63 #include "../src/syspwd.h"
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64 #ifndef WIN32_NATIVE
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428
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65 #include <netdb.h>
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442
|
66 #endif
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428
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67 #include <errno.h>
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68 #include <stdio.h>
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69
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442
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70 #ifdef HAVE_UNISTD_H
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428
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71 #include <unistd.h>
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442
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72 #endif
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428
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73 #include <sys/stat.h>
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442
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74 #ifndef WIN32_NATIVE
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428
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75 #include <sys/file.h>
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442
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76 #endif
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428
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77 #include "../src/syswait.h"
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442
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78 #ifndef WIN32_NATIVE
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428
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79 #include "../src/systime.h"
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80 #endif
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81 #include <stdlib.h>
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82 #include <string.h>
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83
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84 #ifdef KERBEROS
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85 #ifndef KRB5
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86 #include <des.h>
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87 #include <krb.h>
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88 #else /* KRB5 */
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89 #include <krb5/krb5.h>
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90 #include <krb5/ext-proto.h>
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91 #include <ctype.h>
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92 #endif /* KRB5 */
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93 #endif /* KERBEROS */
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94
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95 #ifdef KERBEROS
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96 #ifndef KRB5
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97 extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *,
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458
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98 unsigned long, MSG_DAT *, CREDENTIALS *, Key_schedule,
|
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428
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99 struct sockaddr_in *, struct sockaddr_in *,
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100 char * */);
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101 extern char *krb_realmofhost (/* char * */);
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102 #endif /* ! KRB5 */
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103 #endif /* KERBEROS */
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104
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442
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105 #ifndef WIN32_NATIVE
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428
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106 #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H)
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107 extern int h_errno;
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108 #endif
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109 #endif
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110
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111 static int socket_connection (char *, int);
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112 static char *pop_getline (popserver);
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113 static int sendline (popserver, char *);
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114 static int fullwrite (int, char *, int);
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115 static int getok (popserver);
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116 #if 0
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117 static int gettermination (popserver);
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118 #endif
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119 static void pop_trash (popserver);
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120 static char *find_crlf (char *);
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121
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122 #define ERROR_MAX 80 /* a pretty arbitrary size */
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123 #define POP_PORT 110
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124 #define KPOP_PORT 1109
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442
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125 #if defined(WIN32_NATIVE) || defined(CYGWIN)
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428
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126 #define POP_SERVICE "pop3" /* we don't want the POP2 port! */
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127 #else
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128 #define POP_SERVICE "pop"
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129 #endif
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130 #ifdef KERBEROS
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131 #ifdef KRB5
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132 #define KPOP_SERVICE "k5pop";
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133 #else
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134 #define KPOP_SERVICE "kpop"
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135 #endif
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136 #endif
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137
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138 char pop_error[ERROR_MAX];
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139 int pop_debug = 0;
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140
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|
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141 #ifndef min
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142 #define min(a,b) (((a) < (b)) ? (a) : (b))
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143 #endif
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144
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145 /*
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146 * Function: pop_open (char *host, char *username, char *password,
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147 * int flags)
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148 *
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149 * Purpose: Establishes a connection with a post-office server, and
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150 * completes the authorization portion of the session.
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151 *
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152 * Arguments:
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153 * host The server host with which the connection should be
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154 * established. Optional. If omitted, internal
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155 * heuristics will be used to determine the server host,
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156 * if possible.
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157 * username
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158 * The username of the mail-drop to access. Optional.
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159 * If omitted, internal heuristics will be used to
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160 * determine the username, if possible.
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161 * password
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162 * The password to use for authorization. If omitted,
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163 * internal heuristics will be used to determine the
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164 * password, if possible.
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165 * flags A bit mask containing flags controlling certain
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166 * functions of the routine. Valid flags are defined in
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167 * the file pop.h
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168 *
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169 * Return value: Upon successful establishment of a connection, a
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170 * non-null popserver will be returned. Otherwise, null will be
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171 * returned, and the string variable pop_error will contain an
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172 * explanation of the error.
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173 */
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174 popserver
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175 pop_open (char *host, char *username, char *password, int flags)
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176 {
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177 int sock;
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178 popserver server;
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179
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180 /* Determine the user name */
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181 if (! username)
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182 {
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183 username = getenv ("USER");
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184 if (! (username && *username))
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185 {
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442
|
186 #ifndef WIN32_NATIVE
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428
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187 username = getlogin ();
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188 if (! (username && *username))
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189 {
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190 struct passwd *passwd;
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191 passwd = getpwuid (getuid ());
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192 if (passwd && passwd->pw_name && *passwd->pw_name)
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193 {
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194 username = passwd->pw_name;
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195 }
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196 else
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197 {
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198 strcpy (pop_error, "Could not determine username");
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199 return (0);
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200 }
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201 }
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202 #else
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203 strcpy (pop_error, "Could not determine username");
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204 return (0);
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205 #endif
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206 }
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207 }
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208
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209 /*
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210 * Determine the mail host.
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211 */
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212
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213 if (! host)
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214 {
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215 host = getenv ("MAILHOST");
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216 }
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217
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|
218 #ifdef HESIOD
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219 if ((! host) && (! (flags & POP_NO_HESIOD)))
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220 {
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221 struct hes_postoffice *office;
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222 office = hes_getmailhost (username);
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223 if (office && office->po_type && (! strcmp (office->po_type, "POP"))
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224 && office->po_name && *office->po_name && office->po_host
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225 && *office->po_host)
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226 {
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227 host = office->po_host;
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228 username = office->po_name;
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229 }
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|
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230 }
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|
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231 #endif
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232
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|
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233 #ifdef MAILHOST
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234 if (! host)
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235 {
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236 host = MAILHOST;
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237 }
|
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238 #endif
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239
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240 if (! host)
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241 {
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242 strcpy (pop_error, "Could not determine POP server");
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243 return (0);
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244 }
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245
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|
|
246 /* Determine the password */
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|
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247 #ifdef KERBEROS
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248 #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS))
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249 #else
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250 #define DONT_NEED_PASSWORD 0
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|
251 #endif
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252
|
|
|
253 if ((! password) && (! DONT_NEED_PASSWORD))
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|
|
254 {
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|
442
|
255 #ifndef WIN32_NATIVE
|
|
428
|
256 if (! (flags & POP_NO_GETPASS))
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|
|
257 {
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258 password = getpass ("Enter POP password:");
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|
259 }
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260 #endif
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261 if (! password)
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262 {
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263 strcpy (pop_error, "Could not determine POP password");
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264 return (0);
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265 }
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266 }
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|
267 if (password)
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268 flags |= POP_NO_KERBEROS;
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269 else
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270 password = username;
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271
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272 sock = socket_connection (host, flags);
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273 if (sock == -1)
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274 return (0);
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275
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|
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276 server = (popserver) malloc (sizeof (struct _popserver));
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277 if (! server)
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278 {
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279 strcpy (pop_error, "Out of memory in pop_open");
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280 return (0);
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|
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281 }
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282 server->buffer = (char *) malloc (GETLINE_MIN);
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283 if (! server->buffer)
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|
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284 {
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285 strcpy (pop_error, "Out of memory in pop_open");
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286 free ((char *) server);
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287 return (0);
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|
|
288 }
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289
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|
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290 server->file = sock;
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291 server->data = 0;
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292 server->buffer_index = 0;
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293 server->buffer_size = GETLINE_MIN;
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294 server->in_multi = 0;
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295 server->trash_started = 0;
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296
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297 if (getok (server))
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298 return (0);
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299
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|
|
300 /*
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301 * I really shouldn't use the pop_error variable like this, but....
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302 */
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303 if (strlen (username) > ERROR_MAX - 6)
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|
|
304 {
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305 pop_close (server);
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306 strcpy (pop_error,
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307 "Username too long; recompile pop.c with larger ERROR_MAX");
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|
308 return (0);
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|
|
309 }
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|
|
310 sprintf (pop_error, "USER %s", username);
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311
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|
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312 if (sendline (server, pop_error) || getok (server))
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|
|
313 {
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|
|
314 return (0);
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|
|
315 }
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|
|
316
|
|
|
317 if (strlen (password) > ERROR_MAX - 6)
|
|
|
318 {
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|
|
319 pop_close (server);
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|
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320 strcpy (pop_error,
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|
|
321 "Password too long; recompile pop.c with larger ERROR_MAX");
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|
|
322 return (0);
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|
|
323 }
|
|
|
324 sprintf (pop_error, "PASS %s", password);
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|
|
325
|
|
|
326 if (sendline (server, pop_error) || getok (server))
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|
|
327 {
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|
|
328 return (0);
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|
|
329 }
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|
|
330
|
|
|
331 return (server);
|
|
|
332 }
|
|
|
333
|
|
|
334 /*
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|
|
335 * Function: pop_stat
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|
|
336 *
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|
|
337 * Purpose: Issue the STAT command to the server and return (in the
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|
|
338 * value parameters) the number of messages in the maildrop and
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|
|
339 * the total size of the maildrop.
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|
|
340 *
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|
|
341 * Return value: 0 on success, or non-zero with an error in pop_error
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|
|
342 * in failure.
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|
|
343 *
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|
|
344 * Side effects: On failure, may make further operations on the
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|
|
345 * connection impossible.
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|
|
346 */
|
|
|
347 int
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|
|
348 pop_stat (popserver server, int *count, int *size)
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|
|
349 {
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|
|
350 char *fromserver;
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|
|
351
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|
|
352 if (server->in_multi)
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|
|
353 {
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|
|
354 strcpy (pop_error, "In multi-line query in pop_stat");
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|
|
355 return (-1);
|
|
|
356 }
|
|
|
357
|
|
|
358 if (sendline (server, "STAT") || (! (fromserver = pop_getline (server))))
|
|
|
359 return (-1);
|
|
|
360
|
|
|
361 if (strncmp (fromserver, "+OK ", 4))
|
|
|
362 {
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|
|
363 if (0 == strncmp (fromserver, "-ERR", 4))
|
|
|
364 {
|
|
|
365 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
366 }
|
|
|
367 else
|
|
|
368 {
|
|
|
369 strcpy (pop_error,
|
|
|
370 "Unexpected response from POP server in pop_stat");
|
|
|
371 pop_trash (server);
|
|
|
372 }
|
|
|
373 return (-1);
|
|
|
374 }
|
|
|
375
|
|
|
376 *count = atoi (&fromserver[4]);
|
|
|
377
|
|
|
378 fromserver = strchr (&fromserver[4], ' ');
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|
|
379 if (! fromserver)
|
|
|
380 {
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|
|
381 strcpy (pop_error,
|
|
|
382 "Badly formatted response from server in pop_stat");
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|
|
383 pop_trash (server);
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|
|
384 return (-1);
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|
|
385 }
|
|
|
386
|
|
|
387 *size = atoi (fromserver + 1);
|
|
|
388
|
|
|
389 return (0);
|
|
|
390 }
|
|
|
391
|
|
|
392 /*
|
|
|
393 * Function: pop_list
|
|
|
394 *
|
|
|
395 * Purpose: Performs the POP "list" command and returns (in value
|
|
|
396 * parameters) two malloc'd zero-terminated arrays -- one of
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|
|
397 * message IDs, and a parallel one of sizes.
|
|
|
398 *
|
|
|
399 * Arguments:
|
|
|
400 * server The pop connection to talk to.
|
|
|
401 * message The number of the one message about which to get
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|
|
402 * information, or 0 to get information about all
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|
|
403 * messages.
|
|
|
404 *
|
|
|
405 * Return value: 0 on success, non-zero with error in pop_error on
|
|
|
406 * failure.
|
|
|
407 *
|
|
|
408 * Side effects: On failure, may make further operations on the
|
|
|
409 * connection impossible.
|
|
|
410 */
|
|
|
411 int
|
|
|
412 pop_list (popserver server, int message, int **IDs, int **sizes)
|
|
|
413 {
|
|
|
414 int how_many, i;
|
|
|
415 char *fromserver;
|
|
|
416
|
|
|
417 if (server->in_multi)
|
|
|
418 {
|
|
|
419 strcpy (pop_error, "In multi-line query in pop_list");
|
|
|
420 return (-1);
|
|
|
421 }
|
|
|
422
|
|
|
423 if (message)
|
|
|
424 how_many = 1;
|
|
|
425 else
|
|
|
426 {
|
|
|
427 int count, size;
|
|
|
428 if (pop_stat (server, &count, &size))
|
|
|
429 return (-1);
|
|
|
430 how_many = count;
|
|
|
431 }
|
|
|
432
|
|
|
433 *IDs = (int *) malloc ((how_many + 1) * sizeof (int));
|
|
|
434 *sizes = (int *) malloc ((how_many + 1) * sizeof (int));
|
|
|
435 if (! (*IDs && *sizes))
|
|
|
436 {
|
|
|
437 strcpy (pop_error, "Out of memory in pop_list");
|
|
|
438 return (-1);
|
|
|
439 }
|
|
|
440
|
|
|
441 if (message)
|
|
|
442 {
|
|
|
443 sprintf (pop_error, "LIST %d", message);
|
|
|
444 if (sendline (server, pop_error))
|
|
|
445 {
|
|
|
446 free ((char *) *IDs);
|
|
|
447 free ((char *) *sizes);
|
|
|
448 return (-1);
|
|
|
449 }
|
|
|
450 if (! (fromserver = pop_getline (server)))
|
|
|
451 {
|
|
|
452 free ((char *) *IDs);
|
|
|
453 free ((char *) *sizes);
|
|
|
454 return (-1);
|
|
|
455 }
|
|
|
456 if (strncmp (fromserver, "+OK ", 4))
|
|
|
457 {
|
|
|
458 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
459 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
460 else
|
|
|
461 {
|
|
|
462 strcpy (pop_error,
|
|
|
463 "Unexpected response from server in pop_list");
|
|
|
464 pop_trash (server);
|
|
|
465 }
|
|
|
466 free ((char *) *IDs);
|
|
|
467 free ((char *) *sizes);
|
|
|
468 return (-1);
|
|
|
469 }
|
|
|
470 (*IDs)[0] = atoi (&fromserver[4]);
|
|
|
471 fromserver = strchr (&fromserver[4], ' ');
|
|
|
472 if (! fromserver)
|
|
|
473 {
|
|
|
474 strcpy (pop_error,
|
|
|
475 "Badly formatted response from server in pop_list");
|
|
|
476 pop_trash (server);
|
|
|
477 free ((char *) *IDs);
|
|
|
478 free ((char *) *sizes);
|
|
|
479 return (-1);
|
|
|
480 }
|
|
|
481 (*sizes)[0] = atoi (fromserver);
|
|
|
482 (*IDs)[1] = (*sizes)[1] = 0;
|
|
|
483 return (0);
|
|
|
484 }
|
|
|
485 else
|
|
|
486 {
|
|
|
487 if (pop_multi_first (server, "LIST", &fromserver))
|
|
|
488 {
|
|
|
489 free ((char *) *IDs);
|
|
|
490 free ((char *) *sizes);
|
|
|
491 return (-1);
|
|
|
492 }
|
|
|
493 for (i = 0; i < how_many; i++)
|
|
|
494 {
|
|
|
495 if (pop_multi_next (server, &fromserver))
|
|
|
496 {
|
|
|
497 free ((char *) *IDs);
|
|
|
498 free ((char *) *sizes);
|
|
|
499 return (-1);
|
|
|
500 }
|
|
|
501 (*IDs)[i] = atoi (fromserver);
|
|
|
502 fromserver = strchr (fromserver, ' ');
|
|
|
503 if (! fromserver)
|
|
|
504 {
|
|
|
505 strcpy (pop_error,
|
|
|
506 "Badly formatted response from server in pop_list");
|
|
|
507 free ((char *) *IDs);
|
|
|
508 free ((char *) *sizes);
|
|
|
509 pop_trash (server);
|
|
|
510 return (-1);
|
|
|
511 }
|
|
|
512 (*sizes)[i] = atoi (fromserver);
|
|
|
513 }
|
|
|
514 if (pop_multi_next (server, &fromserver))
|
|
|
515 {
|
|
|
516 free ((char *) *IDs);
|
|
|
517 free ((char *) *sizes);
|
|
|
518 return (-1);
|
|
|
519 }
|
|
|
520 else if (fromserver)
|
|
|
521 {
|
|
|
522 strcpy (pop_error,
|
|
|
523 "Too many response lines from server in pop_list");
|
|
|
524 free ((char *) *IDs);
|
|
|
525 free ((char *) *sizes);
|
|
|
526 return (-1);
|
|
|
527 }
|
|
|
528 (*IDs)[i] = (*sizes)[i] = 0;
|
|
|
529 return (0);
|
|
|
530 }
|
|
|
531 }
|
|
|
532
|
|
|
533 /*
|
|
|
534 * Function: pop_retrieve
|
|
|
535 *
|
|
|
536 * Purpose: Retrieve a specified message from the maildrop.
|
|
|
537 *
|
|
|
538 * Arguments:
|
|
|
539 * server The server to retrieve from.
|
|
|
540 * message The message number to retrieve.
|
|
|
541 * markfrom
|
|
|
542 * If true, then mark the string "From " at the beginning
|
|
|
543 * of lines with '>'.
|
|
|
544 *
|
|
|
545 * Return value: A string pointing to the message, if successful, or
|
|
|
546 * null with pop_error set if not.
|
|
|
547 *
|
|
|
548 * Side effects: May kill connection on error.
|
|
|
549 */
|
|
|
550 char *
|
|
|
551 pop_retrieve (popserver server, int message, int markfrom)
|
|
|
552 {
|
|
|
553 int *IDs, *sizes, bufsize, fromcount = 0, cp = 0;
|
|
|
554 char *ptr, *fromserver;
|
|
|
555 int ret;
|
|
|
556
|
|
|
557 if (server->in_multi)
|
|
|
558 {
|
|
|
559 strcpy (pop_error, "In multi-line query in pop_retrieve");
|
|
|
560 return (0);
|
|
|
561 }
|
|
|
562
|
|
|
563 if (pop_list (server, message, &IDs, &sizes))
|
|
|
564 return (0);
|
|
|
565
|
|
|
566 if (pop_retrieve_first (server, message, &fromserver))
|
|
|
567 {
|
|
|
568 return (0);
|
|
|
569 }
|
|
|
570
|
|
|
571 /*
|
|
|
572 * The "5" below is an arbitrary constant -- I assume that if
|
|
|
573 * there are "From" lines in the text to be marked, there
|
|
|
574 * probably won't be more than 5 of them. If there are, I
|
|
|
575 * allocate more space for them below.
|
|
|
576 */
|
|
|
577 bufsize = sizes[0] + (markfrom ? 5 : 0);
|
|
|
578 ptr = (char *)malloc (bufsize);
|
|
|
579 free ((char *) IDs);
|
|
|
580 free ((char *) sizes);
|
|
|
581
|
|
|
582 if (! ptr)
|
|
|
583 {
|
|
|
584 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
585 pop_retrieve_flush (server);
|
|
|
586 return (0);
|
|
|
587 }
|
|
|
588
|
|
|
589 while (! (ret = pop_retrieve_next (server, &fromserver)))
|
|
|
590 {
|
|
|
591 int linesize;
|
|
|
592
|
|
|
593 if (! fromserver)
|
|
|
594 {
|
|
|
595 ptr[cp] = '\0';
|
|
|
596 return (ptr);
|
|
|
597 }
|
|
|
598 if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' &&
|
|
|
599 fromserver[2] == 'o' && fromserver[3] == 'm' &&
|
|
|
600 fromserver[4] == ' ')
|
|
|
601 {
|
|
|
602 if (++fromcount == 5)
|
|
|
603 {
|
|
|
604 bufsize += 5;
|
|
|
605 ptr = (char *)realloc (ptr, bufsize);
|
|
|
606 if (! ptr)
|
|
|
607 {
|
|
|
608 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
609 pop_retrieve_flush (server);
|
|
|
610 return (0);
|
|
|
611 }
|
|
|
612 fromcount = 0;
|
|
|
613 }
|
|
|
614 ptr[cp++] = '>';
|
|
|
615 }
|
|
|
616 linesize = strlen (fromserver);
|
|
|
617 memcpy (&ptr[cp], fromserver, linesize);
|
|
|
618 cp += linesize;
|
|
|
619 ptr[cp++] = '\n';
|
|
|
620 }
|
|
|
621
|
|
|
622 if (ret)
|
|
|
623 {
|
|
|
624 free (ptr);
|
|
|
625 /* return (0); */
|
|
|
626 }
|
|
|
627 /* This function used to fall off the end, but that doesn't make any sense */
|
|
|
628 return (0);
|
|
|
629 }
|
|
|
630
|
|
|
631 int
|
|
|
632 pop_retrieve_first (popserver server, int message, char **response)
|
|
|
633 {
|
|
|
634 sprintf (pop_error, "RETR %d", message);
|
|
|
635 return (pop_multi_first (server, pop_error, response));
|
|
|
636 }
|
|
|
637
|
|
|
638 int
|
|
|
639 pop_retrieve_next (popserver server, char **line)
|
|
|
640 {
|
|
|
641 return (pop_multi_next (server, line));
|
|
|
642 }
|
|
|
643
|
|
|
644 int
|
|
|
645 pop_retrieve_flush (popserver server)
|
|
|
646 {
|
|
|
647 return (pop_multi_flush (server));
|
|
|
648 }
|
|
|
649
|
|
|
650 int
|
|
|
651 pop_top_first (popserver server, int message, int lines, char **response)
|
|
|
652 {
|
|
|
653 sprintf (pop_error, "TOP %d %d", message, lines);
|
|
|
654 return (pop_multi_first (server, pop_error, response));
|
|
|
655 }
|
|
|
656
|
|
|
657 int
|
|
|
658 pop_top_next (popserver server, char **line)
|
|
|
659 {
|
|
|
660 return (pop_multi_next (server, line));
|
|
|
661 }
|
|
|
662
|
|
|
663 int
|
|
|
664 pop_top_flush (popserver server)
|
|
|
665 {
|
|
|
666 return (pop_multi_flush (server));
|
|
|
667 }
|
|
|
668
|
|
|
669 int
|
|
|
670 pop_multi_first (popserver server, char *command, char **response)
|
|
|
671 {
|
|
|
672 if (server->in_multi)
|
|
|
673 {
|
|
|
674 strcpy (pop_error,
|
|
|
675 "Already in multi-line query in pop_multi_first");
|
|
|
676 return (-1);
|
|
|
677 }
|
|
|
678
|
|
|
679 if (sendline (server, command) || (! (*response = pop_getline (server))))
|
|
|
680 {
|
|
|
681 return (-1);
|
|
|
682 }
|
|
|
683
|
|
|
684 if (0 == strncmp (*response, "-ERR", 4))
|
|
|
685 {
|
|
|
686 strncpy (pop_error, *response, ERROR_MAX);
|
|
|
687 return (-1);
|
|
|
688 }
|
|
|
689 else if (0 == strncmp (*response, "+OK", 3))
|
|
|
690 {
|
|
|
691 for (*response += 3; **response == ' '; (*response)++) /* empty */;
|
|
|
692 server->in_multi = 1;
|
|
|
693 return (0);
|
|
|
694 }
|
|
|
695 else
|
|
|
696 {
|
|
|
697 strcpy (pop_error,
|
|
|
698 "Unexpected response from server in pop_multi_first");
|
|
|
699 return (-1);
|
|
|
700 }
|
|
|
701 }
|
|
|
702
|
|
|
703 int
|
|
|
704 pop_multi_next (popserver server, char **line)
|
|
|
705 {
|
|
|
706 char *fromserver;
|
|
|
707
|
|
|
708 if (! server->in_multi)
|
|
|
709 {
|
|
|
710 strcpy (pop_error, "Not in multi-line query in pop_multi_next");
|
|
|
711 return (-1);
|
|
|
712 }
|
|
|
713
|
|
|
714 fromserver = pop_getline (server);
|
|
|
715 if (! fromserver)
|
|
|
716 {
|
|
|
717 return (-1);
|
|
|
718 }
|
|
|
719
|
|
|
720 if (fromserver[0] == '.')
|
|
|
721 {
|
|
|
722 if (! fromserver[1])
|
|
|
723 {
|
|
|
724 *line = 0;
|
|
|
725 server->in_multi = 0;
|
|
|
726 return (0);
|
|
|
727 }
|
|
|
728 else
|
|
|
729 {
|
|
|
730 *line = fromserver + 1;
|
|
|
731 return (0);
|
|
|
732 }
|
|
|
733 }
|
|
|
734 else
|
|
|
735 {
|
|
|
736 *line = fromserver;
|
|
|
737 return (0);
|
|
|
738 }
|
|
|
739 }
|
|
|
740
|
|
|
741 int
|
|
|
742 pop_multi_flush (popserver server)
|
|
|
743 {
|
|
|
744 char *line;
|
|
|
745
|
|
|
746 if (! server->in_multi)
|
|
|
747 {
|
|
|
748 return (0);
|
|
|
749 }
|
|
|
750
|
|
|
751 while (! pop_multi_next (server, &line))
|
|
|
752 {
|
|
|
753 if (! line)
|
|
|
754 {
|
|
|
755 return (0);
|
|
|
756 }
|
|
|
757 }
|
|
|
758
|
|
|
759 return (-1);
|
|
|
760 }
|
|
|
761
|
|
|
762 /* Function: pop_delete
|
|
|
763 *
|
|
|
764 * Purpose: Delete a specified message.
|
|
|
765 *
|
|
|
766 * Arguments:
|
|
|
767 * server Server from which to delete the message.
|
|
|
768 * message Message to delete.
|
|
|
769 *
|
|
|
770 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
771 * otherwise.
|
|
|
772 */
|
|
|
773 int
|
|
|
774 pop_delete (popserver server, int message)
|
|
|
775 {
|
|
|
776 if (server->in_multi)
|
|
|
777 {
|
|
|
778 strcpy (pop_error, "In multi-line query in pop_delete");
|
|
|
779 return (-1);
|
|
|
780 }
|
|
|
781
|
|
|
782 sprintf (pop_error, "DELE %d", message);
|
|
|
783
|
|
|
784 if (sendline (server, pop_error) || getok (server))
|
|
|
785 return (-1);
|
|
|
786
|
|
|
787 return (0);
|
|
|
788 }
|
|
|
789
|
|
|
790 /*
|
|
|
791 * Function: pop_noop
|
|
|
792 *
|
|
|
793 * Purpose: Send a noop command to the server.
|
|
|
794 *
|
|
|
795 * Argument:
|
|
|
796 * server The server to send to.
|
|
|
797 *
|
|
|
798 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
799 * otherwise.
|
|
|
800 *
|
|
|
801 * Side effects: Closes connection on error.
|
|
|
802 */
|
|
|
803 int
|
|
|
804 pop_noop (popserver server)
|
|
|
805 {
|
|
|
806 if (server->in_multi)
|
|
|
807 {
|
|
|
808 strcpy (pop_error, "In multi-line query in pop_noop");
|
|
|
809 return (-1);
|
|
|
810 }
|
|
|
811
|
|
|
812 if (sendline (server, "NOOP") || getok (server))
|
|
|
813 return (-1);
|
|
|
814
|
|
|
815 return (0);
|
|
|
816 }
|
|
|
817
|
|
|
818 /*
|
|
|
819 * Function: pop_last
|
|
|
820 *
|
|
|
821 * Purpose: Find out the highest seen message from the server.
|
|
|
822 *
|
|
|
823 * Arguments:
|
|
|
824 * server The server.
|
|
|
825 *
|
|
|
826 * Return value: If successful, the highest seen message, which is
|
|
|
827 * greater than or equal to 0. Otherwise, a negative number with
|
|
|
828 * the error explained in pop_error.
|
|
|
829 *
|
|
|
830 * Side effects: Closes the connection on error.
|
|
|
831 */
|
|
|
832 int
|
|
|
833 pop_last (popserver server)
|
|
|
834 {
|
|
|
835 char *fromserver;
|
|
|
836
|
|
|
837 if (server->in_multi)
|
|
|
838 {
|
|
|
839 strcpy (pop_error, "In multi-line query in pop_last");
|
|
|
840 return (-1);
|
|
|
841 }
|
|
|
842
|
|
|
843 if (sendline (server, "LAST"))
|
|
|
844 return (-1);
|
|
|
845
|
|
|
846 if (! (fromserver = pop_getline (server)))
|
|
|
847 return (-1);
|
|
|
848
|
|
|
849 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
850 {
|
|
|
851 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
852 return (-1);
|
|
|
853 }
|
|
|
854 else if (strncmp (fromserver, "+OK ", 4))
|
|
|
855 {
|
|
|
856 strcpy (pop_error, "Unexpected response from server in pop_last");
|
|
|
857 pop_trash (server);
|
|
|
858 return (-1);
|
|
|
859 }
|
|
|
860 else
|
|
|
861 {
|
|
|
862 return (atoi (&fromserver[4]));
|
|
|
863 }
|
|
|
864 }
|
|
|
865
|
|
|
866 /*
|
|
|
867 * Function: pop_reset
|
|
|
868 *
|
|
|
869 * Purpose: Reset the server to its initial connect state
|
|
|
870 *
|
|
|
871 * Arguments:
|
|
|
872 * server The server.
|
|
|
873 *
|
|
|
874 * Return value: 0 for success, non-0 with error in pop_error
|
|
|
875 * otherwise.
|
|
|
876 *
|
|
|
877 * Side effects: Closes the connection on error.
|
|
|
878 */
|
|
|
879 int
|
|
|
880 pop_reset (popserver server)
|
|
|
881 {
|
|
|
882 if (pop_retrieve_flush (server))
|
|
|
883 {
|
|
|
884 return (-1);
|
|
|
885 }
|
|
|
886
|
|
|
887 if (sendline (server, "RSET") || getok (server))
|
|
|
888 return (-1);
|
|
|
889
|
|
|
890 return (0);
|
|
|
891 }
|
|
|
892
|
|
|
893 /*
|
|
|
894 * Function: pop_quit
|
|
|
895 *
|
|
|
896 * Purpose: Quit the connection to the server,
|
|
|
897 *
|
|
|
898 * Arguments:
|
|
|
899 * server The server to quit.
|
|
|
900 *
|
|
|
901 * Return value: 0 for success, non-zero otherwise with error in
|
|
|
902 * pop_error.
|
|
|
903 *
|
|
|
904 * Side Effects: The popserver passed in is unusable after this
|
|
|
905 * function is called, even if an error occurs.
|
|
|
906 */
|
|
|
907 int
|
|
|
908 pop_quit (popserver server)
|
|
|
909 {
|
|
|
910 int ret = 0;
|
|
|
911
|
|
|
912 if (server->file >= 0)
|
|
|
913 {
|
|
|
914 if (pop_retrieve_flush (server))
|
|
|
915 {
|
|
|
916 ret = -1;
|
|
|
917 }
|
|
|
918
|
|
|
919 if (sendline (server, "QUIT") || getok (server))
|
|
|
920 {
|
|
|
921 ret = -1;
|
|
|
922 }
|
|
|
923
|
|
|
924 CLOSESOCKET (server->file);
|
|
|
925 }
|
|
|
926
|
|
|
927 if (server->buffer)
|
|
|
928 free (server->buffer);
|
|
|
929 free ((char *) server);
|
|
|
930
|
|
|
931 return (ret);
|
|
|
932 }
|
|
|
933
|
|
442
|
934 #ifdef WIN32_NATIVE
|
|
428
|
935 static int have_winsock = 0;
|
|
|
936 #endif
|
|
|
937
|
|
|
938 /*
|
|
|
939 * Function: socket_connection
|
|
|
940 *
|
|
|
941 * Purpose: Opens the network connection with the mail host, without
|
|
|
942 * doing any sort of I/O with it or anything.
|
|
|
943 *
|
|
|
944 * Arguments:
|
|
|
945 * host The host to which to connect.
|
|
|
946 * flags Option flags.
|
|
|
947 *
|
|
|
948 * Return value: A file descriptor indicating the connection, or -1
|
|
|
949 * indicating failure, in which case an error has been copied
|
|
|
950 * into pop_error.
|
|
|
951 */
|
|
|
952 static int
|
|
|
953 socket_connection (char *host, int flags)
|
|
|
954 {
|
|
|
955 struct hostent *hostent;
|
|
|
956 struct servent *servent;
|
|
|
957 struct sockaddr_in addr;
|
|
|
958 char found_port = 0;
|
|
|
959 char *service;
|
|
|
960 int sock;
|
|
|
961 #ifdef KERBEROS
|
|
|
962 #ifdef KRB5
|
|
|
963 krb5_error_code rem;
|
|
|
964 krb5_ccache ccdef;
|
|
|
965 krb5_principal client, server;
|
|
|
966 krb5_error *err_ret;
|
|
|
967 register char *cp;
|
|
|
968 #else
|
|
|
969 KTEXT ticket;
|
|
|
970 MSG_DAT msg_data;
|
|
|
971 CREDENTIALS cred;
|
|
|
972 Key_schedule schedule;
|
|
|
973 int rem;
|
|
|
974 #endif /* KRB5 */
|
|
|
975 #endif /* KERBEROS */
|
|
|
976
|
|
|
977 int try_count = 0;
|
|
|
978
|
|
442
|
979 #ifdef WIN32_NATIVE
|
|
428
|
980 {
|
|
|
981 WSADATA winsockData;
|
|
|
982 if (WSAStartup (0x101, &winsockData) == 0)
|
|
|
983 have_winsock = 1;
|
|
|
984 }
|
|
|
985 #endif
|
|
|
986
|
|
|
987 do
|
|
|
988 {
|
|
|
989 hostent = gethostbyname (host);
|
|
|
990 try_count++;
|
|
|
991 if ((! hostent)
|
|
|
992 #ifndef BROKEN_CYGWIN
|
|
|
993 && ((h_errno != TRY_AGAIN) || (try_count == 5))
|
|
|
994 #endif
|
|
|
995 )
|
|
|
996 {
|
|
|
997 strcpy (pop_error, "Could not determine POP server's address");
|
|
|
998 return (-1);
|
|
|
999 }
|
|
|
1000 } while (! hostent);
|
|
|
1001
|
|
|
1002 memset (&addr, 0, sizeof (addr));
|
|
|
1003 addr.sin_family = AF_INET;
|
|
|
1004
|
|
|
1005 #ifdef KERBEROS
|
|
|
1006 service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE;
|
|
|
1007 #else
|
|
|
1008 service = POP_SERVICE;
|
|
|
1009 #endif
|
|
|
1010
|
|
|
1011 #ifdef HESIOD
|
|
|
1012 if (! (flags & POP_NO_HESIOD))
|
|
|
1013 {
|
|
|
1014 servent = hes_getservbyname (service, "tcp");
|
|
|
1015 if (servent)
|
|
|
1016 {
|
|
|
1017 addr.sin_port = servent->s_port;
|
|
|
1018 found_port = 1;
|
|
|
1019 }
|
|
|
1020 }
|
|
|
1021 #endif
|
|
|
1022 if (! found_port)
|
|
|
1023 {
|
|
|
1024 servent = getservbyname (service, "tcp");
|
|
|
1025 if (servent)
|
|
|
1026 {
|
|
|
1027 addr.sin_port = servent->s_port;
|
|
|
1028 }
|
|
|
1029 else
|
|
|
1030 {
|
|
|
1031 #ifdef KERBEROS
|
|
|
1032 addr.sin_port = htons ((flags & POP_NO_KERBEROS) ?
|
|
|
1033 POP_PORT : KPOP_PORT);
|
|
|
1034 #else
|
|
|
1035 addr.sin_port = htons (POP_PORT);
|
|
|
1036 #endif
|
|
|
1037 }
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 #define SOCKET_ERROR "Could not create socket for POP connection: "
|
|
|
1041
|
|
|
1042 sock = socket (PF_INET, SOCK_STREAM, 0);
|
|
|
1043 if (sock < 0)
|
|
|
1044 {
|
|
|
1045 strcpy (pop_error, SOCKET_ERROR);
|
|
|
1046 strncat (pop_error, strerror (errno),
|
|
|
1047 ERROR_MAX - sizeof (SOCKET_ERROR));
|
|
|
1048 return (-1);
|
|
|
1049
|
|
|
1050 }
|
|
|
1051
|
|
|
1052 while (*hostent->h_addr_list)
|
|
|
1053 {
|
|
|
1054 memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length);
|
|
|
1055 if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr)))
|
|
|
1056 break;
|
|
|
1057 hostent->h_addr_list++;
|
|
|
1058 }
|
|
|
1059
|
|
|
1060 #define CONNECT_ERROR "Could not connect to POP server: "
|
|
|
1061
|
|
|
1062 if (! *hostent->h_addr_list)
|
|
|
1063 {
|
|
|
1064 CLOSESOCKET (sock);
|
|
|
1065 strcpy (pop_error, CONNECT_ERROR);
|
|
|
1066 strncat (pop_error, strerror (errno),
|
|
|
1067 ERROR_MAX - sizeof (CONNECT_ERROR));
|
|
|
1068 return (-1);
|
|
|
1069
|
|
|
1070 }
|
|
|
1071
|
|
|
1072 #ifdef KERBEROS
|
|
|
1073 #define KRB_ERROR "Kerberos error connecting to POP server: "
|
|
|
1074 if (! (flags & POP_NO_KERBEROS))
|
|
|
1075 {
|
|
|
1076 #ifdef KRB5
|
|
|
1077 krb5_init_ets ();
|
|
|
1078
|
|
|
1079 if (rem = krb5_cc_default (&ccdef))
|
|
|
1080 {
|
|
|
1081 krb5error:
|
|
|
1082 strcpy (pop_error, KRB_ERROR);
|
|
|
1083 strncat (pop_error, error_message (rem),
|
|
|
1084 ERROR_MAX - sizeof(KRB_ERROR));
|
|
|
1085 CLOSESOCKET (sock);
|
|
|
1086 return (-1);
|
|
|
1087 }
|
|
|
1088
|
|
|
1089 if (rem = krb5_cc_get_principal (ccdef, &client))
|
|
|
1090 {
|
|
|
1091 goto krb5error;
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 for (cp = hostent->h_name; *cp; cp++)
|
|
|
1095 {
|
|
|
1096 if (isupper (*cp))
|
|
|
1097 {
|
|
|
1098 *cp = tolower (*cp);
|
|
|
1099 }
|
|
|
1100 }
|
|
|
1101
|
|
|
1102 if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE,
|
|
|
1103 FALSE, &server))
|
|
|
1104 {
|
|
|
1105 goto krb5error;
|
|
|
1106 }
|
|
|
1107
|
|
|
1108 rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server,
|
|
|
1109 AP_OPTS_MUTUAL_REQUIRED,
|
|
|
1110 0, /* no checksum */
|
|
|
1111 0, /* no creds, use ccache instead */
|
|
|
1112 ccdef,
|
|
|
1113 0, /* don't need seq # */
|
|
|
1114 0, /* don't need subsession key */
|
|
|
1115 &err_ret,
|
|
|
1116 0); /* don't need reply */
|
|
|
1117 krb5_free_principal (server);
|
|
|
1118 if (rem)
|
|
|
1119 {
|
|
|
1120 if (err_ret && err_ret->text.length)
|
|
|
1121 {
|
|
|
1122 strcpy (pop_error, KRB_ERROR);
|
|
|
1123 strncat (pop_error, error_message (rem),
|
|
|
1124 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1125 strncat (pop_error, " [server says '",
|
|
|
1126 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1127 strncat (pop_error, err_ret->text.data,
|
|
|
1128 min (ERROR_MAX - strlen (pop_error) - 1,
|
|
|
1129 err_ret->text.length));
|
|
|
1130 strncat (pop_error, "']",
|
|
|
1131 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1132 }
|
|
|
1133 else
|
|
|
1134 {
|
|
|
1135 strcpy (pop_error, KRB_ERROR);
|
|
|
1136 strncat (pop_error, error_message (rem),
|
|
|
1137 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1138 }
|
|
|
1139 if (err_ret)
|
|
|
1140 krb5_free_error (err_ret);
|
|
|
1141
|
|
|
1142 CLOSESOCKET (sock);
|
|
|
1143 return (-1);
|
|
|
1144 }
|
|
|
1145 #else /* ! KRB5 */
|
|
|
1146 ticket = (KTEXT) malloc (sizeof (KTEXT_ST));
|
|
|
1147 rem = krb_sendauth (0L, sock, ticket, "pop", hostent->h_name,
|
|
|
1148 (char *) krb_realmofhost (hostent->h_name),
|
|
|
1149 (unsigned long) 0, &msg_data, &cred, schedule,
|
|
|
1150 (struct sockaddr_in *) 0,
|
|
|
1151 (struct sockaddr_in *) 0,
|
|
|
1152 "KPOPV0.1");
|
|
|
1153 free ((char *) ticket);
|
|
|
1154 if (rem != KSUCCESS)
|
|
|
1155 {
|
|
|
1156 strcpy (pop_error, KRB_ERROR);
|
|
|
1157 strncat (pop_error, krb_err_txt[rem],
|
|
|
1158 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1159 CLOSESOCKET (sock);
|
|
|
1160 return (-1);
|
|
|
1161 }
|
|
|
1162 #endif /* KRB5 */
|
|
|
1163 }
|
|
|
1164 #endif /* KERBEROS */
|
|
|
1165
|
|
|
1166 return (sock);
|
|
|
1167 } /* socket_connection */
|
|
|
1168
|
|
|
1169 /*
|
|
|
1170 * Function: pop_getline
|
|
|
1171 *
|
|
|
1172 * Purpose: Get a line of text from the connection and return a
|
|
|
1173 * pointer to it. The carriage return and linefeed at the end of
|
|
|
1174 * the line are stripped, but periods at the beginnings of lines
|
|
|
1175 * are NOT dealt with in any special way.
|
|
|
1176 *
|
|
|
1177 * Arguments:
|
|
|
1178 * server The server from which to get the line of text.
|
|
|
1179 *
|
|
|
1180 * Returns: A non-null pointer if successful, or a null pointer on any
|
|
|
1181 * error, with an error message copied into pop_error.
|
|
|
1182 *
|
|
|
1183 * Notes: The line returned is overwritten with each call to pop_getline.
|
|
|
1184 *
|
|
|
1185 * Side effects: Closes the connection on error.
|
|
|
1186 */
|
|
|
1187 static char *
|
|
|
1188 pop_getline (popserver server)
|
|
|
1189 {
|
|
|
1190 #define GETLINE_ERROR "Error reading from server: "
|
|
|
1191
|
|
|
1192 int ret;
|
|
|
1193 int search_offset = 0;
|
|
|
1194
|
|
|
1195 if (server->data)
|
|
|
1196 {
|
|
|
1197 char *cp = find_crlf (server->buffer + server->buffer_index);
|
|
|
1198 if (cp)
|
|
|
1199 {
|
|
|
1200 int found;
|
|
|
1201 int data_used;
|
|
|
1202
|
|
|
1203 found = server->buffer_index;
|
|
|
1204 data_used = (cp + 2) - server->buffer - found;
|
|
|
1205
|
|
|
1206 *cp = '\0'; /* terminate the string to be returned */
|
|
|
1207 server->data -= data_used;
|
|
|
1208 server->buffer_index += data_used;
|
|
|
1209
|
|
|
1210 if (pop_debug)
|
|
|
1211 fprintf (stderr, "<<< %s\n", server->buffer + found);
|
|
|
1212 return (server->buffer + found);
|
|
|
1213 }
|
|
|
1214 else
|
|
|
1215 {
|
|
|
1216 memcpy (server->buffer,
|
|
|
1217 server->buffer + server->buffer_index,
|
|
|
1218 server->data);
|
|
|
1219 /* Record the fact that we've searched the data already in
|
|
|
1220 the buffer for a CRLF, so that when we search below, we
|
|
|
1221 don't have to search the same data twice. There's a "-
|
|
|
1222 1" here to account for the fact that the last character
|
|
|
1223 of the data we have may be the CR of a CRLF pair, of
|
|
|
1224 which we haven't read the second half yet, so we may have
|
|
|
1225 to search it again when we read more data. */
|
|
|
1226 search_offset = server->data - 1;
|
|
|
1227 server->buffer_index = 0;
|
|
|
1228 }
|
|
|
1229 }
|
|
|
1230 else
|
|
|
1231 {
|
|
|
1232 server->buffer_index = 0;
|
|
|
1233 }
|
|
|
1234
|
|
|
1235 while (1)
|
|
|
1236 {
|
|
|
1237 /* There's a "- 1" here to leave room for the null that we put
|
|
|
1238 at the end of the read data below. We put the null there so
|
|
|
1239 that find_crlf knows where to stop when we call it. */
|
|
|
1240 if (server->data == server->buffer_size - 1)
|
|
|
1241 {
|
|
|
1242 server->buffer_size += GETLINE_INCR;
|
|
|
1243 server->buffer = (char *)realloc (server->buffer, server->buffer_size);
|
|
|
1244 if (! server->buffer)
|
|
|
1245 {
|
|
|
1246 strcpy (pop_error, "Out of memory in pop_getline");
|
|
|
1247 pop_trash (server);
|
|
|
1248 return (0);
|
|
|
1249 }
|
|
|
1250 }
|
|
|
1251 ret = RECV (server->file, server->buffer + server->data,
|
|
|
1252 server->buffer_size - server->data - 1, 0);
|
|
|
1253 if (ret < 0)
|
|
|
1254 {
|
|
|
1255 strcpy (pop_error, GETLINE_ERROR);
|
|
|
1256 strncat (pop_error, strerror (errno),
|
|
|
1257 ERROR_MAX - sizeof (GETLINE_ERROR));
|
|
|
1258 pop_trash (server);
|
|
|
1259 return (0);
|
|
|
1260 }
|
|
|
1261 else if (ret == 0)
|
|
|
1262 {
|
|
|
1263 strcpy (pop_error, "Unexpected EOF from server in pop_getline");
|
|
|
1264 pop_trash (server);
|
|
|
1265 return (0);
|
|
|
1266 }
|
|
|
1267 else
|
|
|
1268 {
|
|
|
1269 char *cp;
|
|
|
1270 server->data += ret;
|
|
|
1271 server->buffer[server->data] = '\0';
|
|
|
1272
|
|
|
1273 cp = find_crlf (server->buffer + search_offset);
|
|
|
1274 if (cp)
|
|
|
1275 {
|
|
|
1276 int data_used = (cp + 2) - server->buffer;
|
|
|
1277 *cp = '\0';
|
|
|
1278 server->data -= data_used;
|
|
|
1279 server->buffer_index = data_used;
|
|
|
1280
|
|
|
1281 if (pop_debug)
|
|
|
1282 fprintf (stderr, "<<< %s\n", server->buffer);
|
|
|
1283 return (server->buffer);
|
|
|
1284 }
|
|
|
1285 search_offset += ret;
|
|
|
1286 }
|
|
|
1287 }
|
|
|
1288
|
|
|
1289 /* NOTREACHED */
|
|
|
1290 }
|
|
|
1291
|
|
|
1292 /*
|
|
|
1293 * Function: sendline
|
|
|
1294 *
|
|
|
1295 * Purpose: Sends a line of text to the POP server. The line of text
|
|
|
1296 * passed into this function should NOT have the carriage return
|
|
|
1297 * and linefeed on the end of it. Periods at beginnings of lines
|
|
|
1298 * will NOT be treated specially by this function.
|
|
|
1299 *
|
|
|
1300 * Arguments:
|
|
|
1301 * server The server to which to send the text.
|
|
|
1302 * line The line of text to send.
|
|
|
1303 *
|
|
|
1304 * Return value: Upon successful completion, a value of 0 will be
|
|
|
1305 * returned. Otherwise, a non-zero value will be returned, and
|
|
|
1306 * an error will be copied into pop_error.
|
|
|
1307 *
|
|
|
1308 * Side effects: Closes the connection on error.
|
|
|
1309 */
|
|
|
1310 static int
|
|
|
1311 sendline (popserver server, char *line)
|
|
|
1312 {
|
|
|
1313 #define SENDLINE_ERROR "Error writing to POP server: "
|
|
|
1314 int ret;
|
|
|
1315
|
|
|
1316 ret = fullwrite (server->file, line, strlen (line));
|
|
|
1317 if (ret >= 0)
|
|
|
1318 { /* 0 indicates that a blank line was written */
|
|
|
1319 ret = fullwrite (server->file, "\r\n", 2);
|
|
|
1320 }
|
|
|
1321
|
|
|
1322 if (ret < 0)
|
|
|
1323 {
|
|
|
1324 pop_trash (server);
|
|
|
1325 strcpy (pop_error, SENDLINE_ERROR);
|
|
|
1326 strncat (pop_error, strerror (errno),
|
|
|
1327 ERROR_MAX - sizeof (SENDLINE_ERROR));
|
|
|
1328 return (ret);
|
|
|
1329 }
|
|
|
1330
|
|
|
1331 if (pop_debug)
|
|
|
1332 fprintf (stderr, ">>> %s\n", line);
|
|
|
1333
|
|
|
1334 return (0);
|
|
|
1335 }
|
|
|
1336
|
|
|
1337 /*
|
|
|
1338 * Procedure: fullwrite
|
|
|
1339 *
|
|
|
1340 * Purpose: Just like write, but keeps trying until the entire string
|
|
|
1341 * has been written.
|
|
|
1342 *
|
|
|
1343 * Return value: Same as write. Pop_error is not set.
|
|
|
1344 */
|
|
|
1345 static int
|
|
|
1346 fullwrite (int fd, char *buf, int nbytes)
|
|
|
1347 {
|
|
|
1348 char *cp;
|
|
|
1349 int ret;
|
|
|
1350
|
|
|
1351 cp = buf;
|
|
|
1352 while ((ret = SEND (fd, cp, nbytes, 0)) > 0)
|
|
|
1353 {
|
|
|
1354 cp += ret;
|
|
|
1355 nbytes -= ret;
|
|
|
1356 }
|
|
|
1357
|
|
|
1358 return (ret);
|
|
|
1359 }
|
|
|
1360
|
|
|
1361 /*
|
|
|
1362 * Procedure getok
|
|
|
1363 *
|
|
|
1364 * Purpose: Reads a line from the server. If the return indicator is
|
|
|
1365 * positive, return with a zero exit status. If not, return with
|
|
|
1366 * a negative exit status.
|
|
|
1367 *
|
|
|
1368 * Arguments:
|
|
|
1369 * server The server to read from.
|
|
|
1370 *
|
|
|
1371 * Returns: 0 for success, else for failure and puts error in pop_error.
|
|
|
1372 *
|
|
|
1373 * Side effects: On failure, may make the connection unusable.
|
|
|
1374 */
|
|
|
1375 static int
|
|
|
1376 getok (popserver server)
|
|
|
1377 {
|
|
|
1378 char *fromline;
|
|
|
1379
|
|
|
1380 if (! (fromline = pop_getline (server)))
|
|
|
1381 {
|
|
|
1382 return (-1);
|
|
|
1383 }
|
|
|
1384
|
|
|
1385 if (! strncmp (fromline, "+OK", 3))
|
|
|
1386 return (0);
|
|
|
1387 else if (! strncmp (fromline, "-ERR", 4))
|
|
|
1388 {
|
|
|
1389 strncpy (pop_error, fromline, ERROR_MAX);
|
|
|
1390 pop_error[ERROR_MAX-1] = '\0';
|
|
|
1391 return (-1);
|
|
|
1392 }
|
|
|
1393 else
|
|
|
1394 {
|
|
|
1395 strcpy (pop_error,
|
|
|
1396 "Unexpected response from server; expecting +OK or -ERR");
|
|
|
1397 pop_trash (server);
|
|
|
1398 return (-1);
|
|
|
1399 }
|
|
|
1400 }
|
|
|
1401
|
|
|
1402 #if 0
|
|
|
1403 /*
|
|
|
1404 * Function: gettermination
|
|
|
1405 *
|
|
|
1406 * Purpose: Gets the next line and verifies that it is a termination
|
|
|
1407 * line (nothing but a dot).
|
|
|
1408 *
|
|
|
1409 * Return value: 0 on success, non-zero with pop_error set on error.
|
|
|
1410 *
|
|
|
1411 * Side effects: Closes the connection on error.
|
|
|
1412 */
|
|
|
1413 static int
|
|
|
1414 gettermination (popserver server)
|
|
|
1415 {
|
|
|
1416 char *fromserver;
|
|
|
1417
|
|
|
1418 fromserver = pop_getline (server);
|
|
|
1419 if (! fromserver)
|
|
|
1420 return (-1);
|
|
|
1421
|
|
|
1422 if (strcmp (fromserver, "."))
|
|
|
1423 {
|
|
|
1424 strcpy (pop_error,
|
|
|
1425 "Unexpected response from server in gettermination");
|
|
|
1426 pop_trash (server);
|
|
|
1427 return (-1);
|
|
|
1428 }
|
|
|
1429
|
|
|
1430 return (0);
|
|
|
1431 }
|
|
|
1432 #endif
|
|
|
1433
|
|
|
1434 /*
|
|
|
1435 * Function pop_close
|
|
|
1436 *
|
|
|
1437 * Purpose: Close a pop connection, sending a "RSET" command to try to
|
|
|
1438 * preserve any changes that were made and a "QUIT" command to
|
|
|
1439 * try to get the server to quit, but ignoring any responses that
|
|
|
1440 * are received.
|
|
|
1441 *
|
|
|
1442 * Side effects: The server is unusable after this function returns.
|
|
|
1443 * Changes made to the maildrop since the session was started (or
|
|
|
1444 * since the last pop_reset) may be lost.
|
|
|
1445 */
|
|
|
1446 void
|
|
|
1447 pop_close (popserver server)
|
|
|
1448 {
|
|
|
1449 pop_trash (server);
|
|
|
1450 free ((char *) server);
|
|
|
1451
|
|
|
1452 return;
|
|
|
1453 }
|
|
|
1454
|
|
|
1455 /*
|
|
|
1456 * Function: pop_trash
|
|
|
1457 *
|
|
|
1458 * Purpose: Like pop_close or pop_quit, but doesn't deallocate the
|
|
|
1459 * memory associated with the server. It is legal to call
|
|
|
1460 * pop_close or pop_quit after this function has been called.
|
|
|
1461 */
|
|
|
1462 static void
|
|
|
1463 pop_trash (popserver server)
|
|
|
1464 {
|
|
|
1465 if (server->file >= 0)
|
|
|
1466 {
|
|
|
1467 /* avoid recursion; sendline can call pop_trash */
|
|
|
1468 if (server->trash_started)
|
|
|
1469 return;
|
|
|
1470 server->trash_started = 1;
|
|
|
1471
|
|
|
1472 sendline (server, "RSET");
|
|
|
1473 sendline (server, "QUIT");
|
|
|
1474
|
|
|
1475 CLOSESOCKET (server->file);
|
|
|
1476 server->file = -1;
|
|
|
1477 if (server->buffer)
|
|
|
1478 {
|
|
|
1479 free (server->buffer);
|
|
|
1480 server->buffer = 0;
|
|
|
1481 }
|
|
|
1482 }
|
|
|
1483
|
|
442
|
1484 #ifdef WIN32_NATIVE
|
|
428
|
1485 if (have_winsock)
|
|
|
1486 WSACleanup ();
|
|
|
1487 #endif
|
|
|
1488 }
|
|
|
1489
|
|
|
1490 /* Return a pointer to the first CRLF in IN_STRING,
|
|
|
1491 or 0 if it does not contain one. */
|
|
|
1492
|
|
|
1493 static char *
|
|
|
1494 find_crlf (char *in_string)
|
|
|
1495 {
|
|
|
1496 while (1)
|
|
|
1497 {
|
|
|
1498 if (! *in_string)
|
|
|
1499 return (0);
|
|
|
1500 else if (*in_string == '\r')
|
|
|
1501 {
|
|
|
1502 if (*++in_string == '\n')
|
|
|
1503 return (in_string - 1);
|
|
|
1504 }
|
|
|
1505 else
|
|
|
1506 in_string++;
|
|
|
1507 }
|
|
|
1508 /* NOTREACHED */
|
|
|
1509 }
|
|
|
1510
|
|
|
1511 #endif /* MAIL_USE_POP */
|
