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118
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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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24 #include <../src/config.h>
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25 #else
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26 #define MAIL_USE_POP
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27 #endif
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28
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29 #ifdef MAIL_USE_POP
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30
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31 #ifdef HAVE_CONFIG_H
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32 /* Cancel these substitutions made in config.h */
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33 #undef open
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34 #undef read
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35 #undef write
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36 #undef close
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37 #endif
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38
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39 #include <sys/types.h>
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40 #ifdef WINDOWSNT
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41 #include <winsock.h>
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42 #undef SOCKET_ERROR
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43 #define RECV(s,buf,len,flags) recv(s,buf,len,flags)
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44 #define SEND(s,buf,len,flags) send(s,buf,len,flags)
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45 #define CLOSESOCKET(s) closesocket(s)
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46 #else
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47 #include <netinet/in.h>
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48 #include <sys/socket.h>
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49 #define RECV(s,buf,len,flags) read(s,buf,len)
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50 #define SEND(s,buf,len,flags) write(s,buf,len)
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51 #define CLOSESOCKET(s) close(s)
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52 #endif
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159
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53 #include "pop.h"
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118
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54
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55 #ifdef sun
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56 #include <malloc.h>
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57 #endif /* sun */
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58
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59 #ifdef HESIOD
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60 #include <hesiod.h>
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61 /*
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62 * It really shouldn't be necessary to put this declaration here, but
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63 * the version of hesiod.h that Athena has installed in release 7.2
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64 * doesn't declare this function; I don't know if the 7.3 version of
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65 * hesiod.h does.
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66 */
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67 extern struct servent *hes_getservbyname (/* char *, char * */);
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68 #endif
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69
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70 #include <pwd.h>
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71 #include <netdb.h>
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72 #include <errno.h>
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73 #include <stdio.h>
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74
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213
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75 #include <unistd.h>
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76 #include <sys/stat.h>
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77 #include <sys/file.h>
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78 #include "../src/syswait.h"
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384
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79 #ifndef WINDOWSNT
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213
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80 #include "../src/systime.h"
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384
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81 #endif
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213
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82 #include <stdlib.h>
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83 #include <string.h>
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84
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118
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85 #ifdef KERBEROS
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86 #ifndef KRB5
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87 #include <des.h>
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88 #include <krb.h>
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89 #else /* KRB5 */
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90 #include <krb5/krb5.h>
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91 #include <krb5/ext-proto.h>
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92 #include <ctype.h>
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93 #endif /* KRB5 */
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94 #endif /* KERBEROS */
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95
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96 #ifdef KERBEROS
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97 #ifndef KRB5
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98 extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *,
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99 u_long, MSG_DAT *, CREDENTIALS *, Key_schedule,
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100 struct sockaddr_in *, struct sockaddr_in *,
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101 char * */);
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102 extern char *krb_realmofhost (/* char * */);
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103 #endif /* ! KRB5 */
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104 #endif /* KERBEROS */
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105
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106 #ifndef WINDOWSNT
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107 #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H)
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108 extern int h_errno;
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109 #endif
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110 #endif
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111
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272
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112 static int socket_connection (char *, int);
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113 static char *pop_getline (popserver);
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114 static int sendline (popserver, char *);
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115 static int fullwrite (int, char *, int);
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116 static int getok (popserver);
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118
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117 #if 0
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272
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118 static int gettermination (popserver);
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118
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119 #endif
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272
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120 static void pop_trash (popserver);
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121 static char *find_crlf (char *);
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118
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122
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123 #define ERROR_MAX 80 /* a pretty arbitrary size */
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124 #define POP_PORT 110
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125 #define KPOP_PORT 1109
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259
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126 #if defined(WINDOWSNT) || defined(__CYGWIN32__)
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118
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127 #define POP_SERVICE "pop3" /* we don't want the POP2 port! */
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128 #else
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129 #define POP_SERVICE "pop"
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130 #endif
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131 #ifdef KERBEROS
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132 #ifdef KRB5
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133 #define KPOP_SERVICE "k5pop";
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134 #else
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135 #define KPOP_SERVICE "kpop"
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136 #endif
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137 #endif
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138
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139 char pop_error[ERROR_MAX];
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140 int pop_debug = 0;
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141
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142 #ifndef min
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143 #define min(a,b) (((a) < (b)) ? (a) : (b))
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144 #endif
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145
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146 /*
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147 * Function: pop_open (char *host, char *username, char *password,
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148 * int flags)
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149 *
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150 * Purpose: Establishes a connection with a post-office server, and
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151 * completes the authorization portion of the session.
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152 *
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153 * Arguments:
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154 * host The server host with which the connection should be
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155 * established. Optional. If omitted, internal
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156 * heuristics will be used to determine the server host,
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157 * if possible.
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158 * username
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159 * The username of the mail-drop to access. Optional.
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160 * If omitted, internal heuristics will be used to
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161 * determine the username, if possible.
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162 * password
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163 * The password to use for authorization. If omitted,
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164 * internal heuristics will be used to determine the
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165 * password, if possible.
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166 * flags A bit mask containing flags controlling certain
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167 * functions of the routine. Valid flags are defined in
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168 * the file pop.h
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169 *
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170 * Return value: Upon successful establishment of a connection, a
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171 * non-null popserver will be returned. Otherwise, null will be
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172 * returned, and the string variable pop_error will contain an
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173 * explanation of the error.
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174 */
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175 popserver
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272
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176 pop_open (char *host, char *username, char *password, int flags)
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118
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177 {
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178 int sock;
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179 popserver server;
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180
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181 /* Determine the user name */
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182 if (! username)
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183 {
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184 username = getenv ("USER");
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185 if (! (username && *username))
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186 {
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384
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187 #ifndef WINDOWSNT
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118
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188 username = getlogin ();
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189 if (! (username && *username))
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190 {
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191 struct passwd *passwd;
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192 passwd = getpwuid (getuid ());
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193 if (passwd && passwd->pw_name && *passwd->pw_name)
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194 {
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195 username = passwd->pw_name;
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196 }
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197 else
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198 {
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199 strcpy (pop_error, "Could not determine username");
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200 return (0);
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201 }
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202 }
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384
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203 #else
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204 strcpy (pop_error, "Could not determine username");
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205 return (0);
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206 #endif
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118
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207 }
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208 }
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209
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210 /*
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211 * Determine the mail host.
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212 */
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213
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214 if (! host)
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215 {
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216 host = getenv ("MAILHOST");
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217 }
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218
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219 #ifdef HESIOD
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220 if ((! host) && (! (flags & POP_NO_HESIOD)))
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221 {
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222 struct hes_postoffice *office;
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223 office = hes_getmailhost (username);
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224 if (office && office->po_type && (! strcmp (office->po_type, "POP"))
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225 && office->po_name && *office->po_name && office->po_host
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226 && *office->po_host)
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227 {
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228 host = office->po_host;
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229 username = office->po_name;
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230 }
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231 }
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232 #endif
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233
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234 #ifdef MAILHOST
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235 if (! host)
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236 {
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237 host = MAILHOST;
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238 }
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239 #endif
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240
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241 if (! host)
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242 {
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243 strcpy (pop_error, "Could not determine POP server");
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244 return (0);
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245 }
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246
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247 /* Determine the password */
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248 #ifdef KERBEROS
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249 #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS))
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250 #else
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251 #define DONT_NEED_PASSWORD 0
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252 #endif
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253
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254 if ((! password) && (! DONT_NEED_PASSWORD))
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255 {
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384
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256 #ifndef WINDOWSNT
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118
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257 if (! (flags & POP_NO_GETPASS))
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258 {
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259 password = getpass ("Enter POP password:");
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260 }
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384
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261 #endif
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118
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262 if (! password)
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263 {
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264 strcpy (pop_error, "Could not determine POP password");
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265 return (0);
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266 }
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267 }
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268 if (password)
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269 flags |= POP_NO_KERBEROS;
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270 else
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271 password = username;
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272
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273 sock = socket_connection (host, flags);
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274 if (sock == -1)
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275 return (0);
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276
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277 server = (popserver) malloc (sizeof (struct _popserver));
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278 if (! server)
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279 {
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280 strcpy (pop_error, "Out of memory in pop_open");
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281 return (0);
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282 }
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283 server->buffer = (char *) malloc (GETLINE_MIN);
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284 if (! server->buffer)
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285 {
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286 strcpy (pop_error, "Out of memory in pop_open");
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287 free ((char *) server);
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288 return (0);
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289 }
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290
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291 server->file = sock;
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292 server->data = 0;
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293 server->buffer_index = 0;
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294 server->buffer_size = GETLINE_MIN;
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295 server->in_multi = 0;
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296 server->trash_started = 0;
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297
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298 if (getok (server))
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299 return (0);
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300
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301 /*
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302 * I really shouldn't use the pop_error variable like this, but....
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303 */
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304 if (strlen (username) > ERROR_MAX - 6)
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305 {
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306 pop_close (server);
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307 strcpy (pop_error,
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308 "Username too long; recompile pop.c with larger ERROR_MAX");
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309 return (0);
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310 }
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311 sprintf (pop_error, "USER %s", username);
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312
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313 if (sendline (server, pop_error) || getok (server))
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314 {
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315 return (0);
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316 }
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317
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318 if (strlen (password) > ERROR_MAX - 6)
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319 {
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320 pop_close (server);
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321 strcpy (pop_error,
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322 "Password too long; recompile pop.c with larger ERROR_MAX");
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323 return (0);
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324 }
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325 sprintf (pop_error, "PASS %s", password);
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326
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327 if (sendline (server, pop_error) || getok (server))
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328 {
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329 return (0);
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330 }
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331
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332 return (server);
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333 }
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334
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335 /*
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336 * Function: pop_stat
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337 *
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338 * Purpose: Issue the STAT command to the server and return (in the
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339 * value parameters) the number of messages in the maildrop and
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340 * the total size of the maildrop.
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341 *
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342 * Return value: 0 on success, or non-zero with an error in pop_error
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343 * in failure.
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344 *
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345 * Side effects: On failure, may make further operations on the
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346 * connection impossible.
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347 */
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348 int
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272
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349 pop_stat (popserver server, int *count, int *size)
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118
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350 {
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351 char *fromserver;
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352
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353 if (server->in_multi)
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354 {
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355 strcpy (pop_error, "In multi-line query in pop_stat");
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356 return (-1);
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357 }
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358
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272
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359 if (sendline (server, "STAT") || (! (fromserver = pop_getline (server))))
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118
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360 return (-1);
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361
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362 if (strncmp (fromserver, "+OK ", 4))
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363 {
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364 if (0 == strncmp (fromserver, "-ERR", 4))
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365 {
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366 strncpy (pop_error, fromserver, ERROR_MAX);
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367 }
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368 else
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369 {
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370 strcpy (pop_error,
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371 "Unexpected response from POP server in pop_stat");
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372 pop_trash (server);
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373 }
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374 return (-1);
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375 }
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376
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377 *count = atoi (&fromserver[4]);
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378
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272
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379 fromserver = strchr (&fromserver[4], ' ');
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118
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380 if (! fromserver)
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381 {
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382 strcpy (pop_error,
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383 "Badly formatted response from server in pop_stat");
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384 pop_trash (server);
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385 return (-1);
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386 }
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387
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388 *size = atoi (fromserver + 1);
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389
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390 return (0);
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391 }
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392
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|
|
393 /*
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|
|
394 * Function: pop_list
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395 *
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396 * Purpose: Performs the POP "list" command and returns (in value
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397 * parameters) two malloc'd zero-terminated arrays -- one of
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398 * message IDs, and a parallel one of sizes.
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|
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399 *
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400 * Arguments:
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401 * server The pop connection to talk to.
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402 * message The number of the one message about which to get
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403 * information, or 0 to get information about all
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404 * messages.
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405 *
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406 * Return value: 0 on success, non-zero with error in pop_error on
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407 * failure.
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408 *
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409 * Side effects: On failure, may make further operations on the
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410 * connection impossible.
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|
411 */
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|
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412 int
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272
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413 pop_list (popserver server, int message, int **IDs, int **sizes)
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|
118
|
414 {
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|
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415 int how_many, i;
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|
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416 char *fromserver;
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417
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|
|
418 if (server->in_multi)
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419 {
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420 strcpy (pop_error, "In multi-line query in pop_list");
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|
|
421 return (-1);
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422 }
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423
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|
|
424 if (message)
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|
|
425 how_many = 1;
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|
|
426 else
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|
|
427 {
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|
|
428 int count, size;
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|
|
429 if (pop_stat (server, &count, &size))
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|
|
430 return (-1);
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|
|
431 how_many = count;
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|
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432 }
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433
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|
|
434 *IDs = (int *) malloc ((how_many + 1) * sizeof (int));
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|
|
435 *sizes = (int *) malloc ((how_many + 1) * sizeof (int));
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|
|
436 if (! (*IDs && *sizes))
|
|
|
437 {
|
|
|
438 strcpy (pop_error, "Out of memory in pop_list");
|
|
|
439 return (-1);
|
|
|
440 }
|
|
|
441
|
|
|
442 if (message)
|
|
|
443 {
|
|
|
444 sprintf (pop_error, "LIST %d", message);
|
|
|
445 if (sendline (server, pop_error))
|
|
|
446 {
|
|
|
447 free ((char *) *IDs);
|
|
|
448 free ((char *) *sizes);
|
|
|
449 return (-1);
|
|
|
450 }
|
|
272
|
451 if (! (fromserver = pop_getline (server)))
|
|
118
|
452 {
|
|
|
453 free ((char *) *IDs);
|
|
|
454 free ((char *) *sizes);
|
|
|
455 return (-1);
|
|
|
456 }
|
|
|
457 if (strncmp (fromserver, "+OK ", 4))
|
|
|
458 {
|
|
|
459 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
460 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
461 else
|
|
|
462 {
|
|
|
463 strcpy (pop_error,
|
|
|
464 "Unexpected response from server in pop_list");
|
|
|
465 pop_trash (server);
|
|
|
466 }
|
|
|
467 free ((char *) *IDs);
|
|
|
468 free ((char *) *sizes);
|
|
|
469 return (-1);
|
|
|
470 }
|
|
|
471 (*IDs)[0] = atoi (&fromserver[4]);
|
|
272
|
472 fromserver = strchr (&fromserver[4], ' ');
|
|
118
|
473 if (! fromserver)
|
|
|
474 {
|
|
|
475 strcpy (pop_error,
|
|
|
476 "Badly formatted response from server in pop_list");
|
|
|
477 pop_trash (server);
|
|
|
478 free ((char *) *IDs);
|
|
|
479 free ((char *) *sizes);
|
|
|
480 return (-1);
|
|
|
481 }
|
|
|
482 (*sizes)[0] = atoi (fromserver);
|
|
|
483 (*IDs)[1] = (*sizes)[1] = 0;
|
|
|
484 return (0);
|
|
|
485 }
|
|
|
486 else
|
|
|
487 {
|
|
|
488 if (pop_multi_first (server, "LIST", &fromserver))
|
|
|
489 {
|
|
|
490 free ((char *) *IDs);
|
|
|
491 free ((char *) *sizes);
|
|
|
492 return (-1);
|
|
|
493 }
|
|
|
494 for (i = 0; i < how_many; i++)
|
|
|
495 {
|
|
|
496 if (pop_multi_next (server, &fromserver))
|
|
|
497 {
|
|
|
498 free ((char *) *IDs);
|
|
|
499 free ((char *) *sizes);
|
|
|
500 return (-1);
|
|
|
501 }
|
|
|
502 (*IDs)[i] = atoi (fromserver);
|
|
272
|
503 fromserver = strchr (fromserver, ' ');
|
|
118
|
504 if (! fromserver)
|
|
|
505 {
|
|
|
506 strcpy (pop_error,
|
|
|
507 "Badly formatted response from server in pop_list");
|
|
|
508 free ((char *) *IDs);
|
|
|
509 free ((char *) *sizes);
|
|
|
510 pop_trash (server);
|
|
|
511 return (-1);
|
|
|
512 }
|
|
|
513 (*sizes)[i] = atoi (fromserver);
|
|
|
514 }
|
|
|
515 if (pop_multi_next (server, &fromserver))
|
|
|
516 {
|
|
|
517 free ((char *) *IDs);
|
|
|
518 free ((char *) *sizes);
|
|
|
519 return (-1);
|
|
|
520 }
|
|
|
521 else if (fromserver)
|
|
|
522 {
|
|
|
523 strcpy (pop_error,
|
|
|
524 "Too many response lines from server in pop_list");
|
|
|
525 free ((char *) *IDs);
|
|
|
526 free ((char *) *sizes);
|
|
|
527 return (-1);
|
|
|
528 }
|
|
|
529 (*IDs)[i] = (*sizes)[i] = 0;
|
|
|
530 return (0);
|
|
|
531 }
|
|
|
532 }
|
|
|
533
|
|
|
534 /*
|
|
|
535 * Function: pop_retrieve
|
|
|
536 *
|
|
|
537 * Purpose: Retrieve a specified message from the maildrop.
|
|
|
538 *
|
|
|
539 * Arguments:
|
|
|
540 * server The server to retrieve from.
|
|
|
541 * message The message number to retrieve.
|
|
|
542 * markfrom
|
|
|
543 * If true, then mark the string "From " at the beginning
|
|
|
544 * of lines with '>'.
|
|
|
545 *
|
|
|
546 * Return value: A string pointing to the message, if successful, or
|
|
|
547 * null with pop_error set if not.
|
|
|
548 *
|
|
|
549 * Side effects: May kill connection on error.
|
|
|
550 */
|
|
|
551 char *
|
|
272
|
552 pop_retrieve (popserver server, int message, int markfrom)
|
|
118
|
553 {
|
|
|
554 int *IDs, *sizes, bufsize, fromcount = 0, cp = 0;
|
|
|
555 char *ptr, *fromserver;
|
|
|
556 int ret;
|
|
|
557
|
|
|
558 if (server->in_multi)
|
|
|
559 {
|
|
|
560 strcpy (pop_error, "In multi-line query in pop_retrieve");
|
|
|
561 return (0);
|
|
|
562 }
|
|
|
563
|
|
|
564 if (pop_list (server, message, &IDs, &sizes))
|
|
|
565 return (0);
|
|
|
566
|
|
|
567 if (pop_retrieve_first (server, message, &fromserver))
|
|
|
568 {
|
|
|
569 return (0);
|
|
|
570 }
|
|
|
571
|
|
|
572 /*
|
|
|
573 * The "5" below is an arbitrary constant -- I assume that if
|
|
|
574 * there are "From" lines in the text to be marked, there
|
|
|
575 * probably won't be more than 5 of them. If there are, I
|
|
|
576 * allocate more space for them below.
|
|
|
577 */
|
|
|
578 bufsize = sizes[0] + (markfrom ? 5 : 0);
|
|
|
579 ptr = (char *)malloc (bufsize);
|
|
|
580 free ((char *) IDs);
|
|
|
581 free ((char *) sizes);
|
|
|
582
|
|
|
583 if (! ptr)
|
|
|
584 {
|
|
|
585 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
586 pop_retrieve_flush (server);
|
|
|
587 return (0);
|
|
|
588 }
|
|
|
589
|
|
|
590 while (! (ret = pop_retrieve_next (server, &fromserver)))
|
|
|
591 {
|
|
|
592 int linesize;
|
|
|
593
|
|
|
594 if (! fromserver)
|
|
|
595 {
|
|
|
596 ptr[cp] = '\0';
|
|
|
597 return (ptr);
|
|
|
598 }
|
|
|
599 if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' &&
|
|
|
600 fromserver[2] == 'o' && fromserver[3] == 'm' &&
|
|
|
601 fromserver[4] == ' ')
|
|
|
602 {
|
|
|
603 if (++fromcount == 5)
|
|
|
604 {
|
|
|
605 bufsize += 5;
|
|
|
606 ptr = (char *)realloc (ptr, bufsize);
|
|
|
607 if (! ptr)
|
|
|
608 {
|
|
|
609 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
610 pop_retrieve_flush (server);
|
|
|
611 return (0);
|
|
|
612 }
|
|
|
613 fromcount = 0;
|
|
|
614 }
|
|
|
615 ptr[cp++] = '>';
|
|
|
616 }
|
|
|
617 linesize = strlen (fromserver);
|
|
272
|
618 memcpy (&ptr[cp], fromserver, linesize);
|
|
118
|
619 cp += linesize;
|
|
|
620 ptr[cp++] = '\n';
|
|
|
621 }
|
|
|
622
|
|
|
623 if (ret)
|
|
|
624 {
|
|
|
625 free (ptr);
|
|
213
|
626 /* return (0); */
|
|
118
|
627 }
|
|
213
|
628 /* This function used to fall off the end, but that doesn't make any sense */
|
|
|
629 return (0);
|
|
118
|
630 }
|
|
|
631
|
|
|
632 int
|
|
272
|
633 pop_retrieve_first (popserver server, int message, char **response)
|
|
118
|
634 {
|
|
|
635 sprintf (pop_error, "RETR %d", message);
|
|
|
636 return (pop_multi_first (server, pop_error, response));
|
|
|
637 }
|
|
|
638
|
|
|
639 int
|
|
272
|
640 pop_retrieve_next (popserver server, char **line)
|
|
118
|
641 {
|
|
|
642 return (pop_multi_next (server, line));
|
|
|
643 }
|
|
|
644
|
|
|
645 int
|
|
272
|
646 pop_retrieve_flush (popserver server)
|
|
118
|
647 {
|
|
|
648 return (pop_multi_flush (server));
|
|
|
649 }
|
|
|
650
|
|
|
651 int
|
|
272
|
652 pop_top_first (popserver server, int message, int lines, char **response)
|
|
118
|
653 {
|
|
|
654 sprintf (pop_error, "TOP %d %d", message, lines);
|
|
|
655 return (pop_multi_first (server, pop_error, response));
|
|
|
656 }
|
|
|
657
|
|
|
658 int
|
|
272
|
659 pop_top_next (popserver server, char **line)
|
|
118
|
660 {
|
|
|
661 return (pop_multi_next (server, line));
|
|
|
662 }
|
|
|
663
|
|
|
664 int
|
|
272
|
665 pop_top_flush (popserver server)
|
|
118
|
666 {
|
|
|
667 return (pop_multi_flush (server));
|
|
|
668 }
|
|
|
669
|
|
|
670 int
|
|
272
|
671 pop_multi_first (popserver server, char *command, char **response)
|
|
118
|
672 {
|
|
|
673 if (server->in_multi)
|
|
|
674 {
|
|
|
675 strcpy (pop_error,
|
|
|
676 "Already in multi-line query in pop_multi_first");
|
|
|
677 return (-1);
|
|
|
678 }
|
|
|
679
|
|
272
|
680 if (sendline (server, command) || (! (*response = pop_getline (server))))
|
|
118
|
681 {
|
|
|
682 return (-1);
|
|
|
683 }
|
|
|
684
|
|
|
685 if (0 == strncmp (*response, "-ERR", 4))
|
|
|
686 {
|
|
|
687 strncpy (pop_error, *response, ERROR_MAX);
|
|
|
688 return (-1);
|
|
|
689 }
|
|
|
690 else if (0 == strncmp (*response, "+OK", 3))
|
|
|
691 {
|
|
|
692 for (*response += 3; **response == ' '; (*response)++) /* empty */;
|
|
|
693 server->in_multi = 1;
|
|
|
694 return (0);
|
|
|
695 }
|
|
|
696 else
|
|
|
697 {
|
|
|
698 strcpy (pop_error,
|
|
|
699 "Unexpected response from server in pop_multi_first");
|
|
|
700 return (-1);
|
|
|
701 }
|
|
|
702 }
|
|
|
703
|
|
|
704 int
|
|
272
|
705 pop_multi_next (popserver server, char **line)
|
|
118
|
706 {
|
|
|
707 char *fromserver;
|
|
|
708
|
|
|
709 if (! server->in_multi)
|
|
|
710 {
|
|
|
711 strcpy (pop_error, "Not in multi-line query in pop_multi_next");
|
|
|
712 return (-1);
|
|
|
713 }
|
|
|
714
|
|
272
|
715 fromserver = pop_getline (server);
|
|
118
|
716 if (! fromserver)
|
|
|
717 {
|
|
|
718 return (-1);
|
|
|
719 }
|
|
|
720
|
|
|
721 if (fromserver[0] == '.')
|
|
|
722 {
|
|
|
723 if (! fromserver[1])
|
|
|
724 {
|
|
|
725 *line = 0;
|
|
|
726 server->in_multi = 0;
|
|
|
727 return (0);
|
|
|
728 }
|
|
|
729 else
|
|
|
730 {
|
|
|
731 *line = fromserver + 1;
|
|
|
732 return (0);
|
|
|
733 }
|
|
|
734 }
|
|
|
735 else
|
|
|
736 {
|
|
|
737 *line = fromserver;
|
|
|
738 return (0);
|
|
|
739 }
|
|
|
740 }
|
|
|
741
|
|
|
742 int
|
|
272
|
743 pop_multi_flush (popserver server)
|
|
118
|
744 {
|
|
|
745 char *line;
|
|
|
746
|
|
|
747 if (! server->in_multi)
|
|
|
748 {
|
|
|
749 return (0);
|
|
|
750 }
|
|
|
751
|
|
|
752 while (! pop_multi_next (server, &line))
|
|
|
753 {
|
|
|
754 if (! line)
|
|
|
755 {
|
|
|
756 return (0);
|
|
|
757 }
|
|
|
758 }
|
|
|
759
|
|
|
760 return (-1);
|
|
|
761 }
|
|
|
762
|
|
|
763 /* Function: pop_delete
|
|
|
764 *
|
|
|
765 * Purpose: Delete a specified message.
|
|
|
766 *
|
|
|
767 * Arguments:
|
|
|
768 * server Server from which to delete the message.
|
|
|
769 * message Message to delete.
|
|
|
770 *
|
|
|
771 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
772 * otherwise.
|
|
|
773 */
|
|
|
774 int
|
|
272
|
775 pop_delete (popserver server, int message)
|
|
118
|
776 {
|
|
|
777 if (server->in_multi)
|
|
|
778 {
|
|
|
779 strcpy (pop_error, "In multi-line query in pop_delete");
|
|
|
780 return (-1);
|
|
|
781 }
|
|
|
782
|
|
|
783 sprintf (pop_error, "DELE %d", message);
|
|
|
784
|
|
|
785 if (sendline (server, pop_error) || getok (server))
|
|
|
786 return (-1);
|
|
|
787
|
|
|
788 return (0);
|
|
|
789 }
|
|
|
790
|
|
|
791 /*
|
|
|
792 * Function: pop_noop
|
|
|
793 *
|
|
|
794 * Purpose: Send a noop command to the server.
|
|
|
795 *
|
|
|
796 * Argument:
|
|
|
797 * server The server to send to.
|
|
|
798 *
|
|
|
799 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
800 * otherwise.
|
|
|
801 *
|
|
|
802 * Side effects: Closes connection on error.
|
|
|
803 */
|
|
|
804 int
|
|
272
|
805 pop_noop (popserver server)
|
|
118
|
806 {
|
|
|
807 if (server->in_multi)
|
|
|
808 {
|
|
|
809 strcpy (pop_error, "In multi-line query in pop_noop");
|
|
|
810 return (-1);
|
|
|
811 }
|
|
|
812
|
|
|
813 if (sendline (server, "NOOP") || getok (server))
|
|
|
814 return (-1);
|
|
|
815
|
|
|
816 return (0);
|
|
|
817 }
|
|
|
818
|
|
|
819 /*
|
|
|
820 * Function: pop_last
|
|
|
821 *
|
|
|
822 * Purpose: Find out the highest seen message from the server.
|
|
|
823 *
|
|
|
824 * Arguments:
|
|
|
825 * server The server.
|
|
|
826 *
|
|
|
827 * Return value: If successful, the highest seen message, which is
|
|
|
828 * greater than or equal to 0. Otherwise, a negative number with
|
|
|
829 * the error explained in pop_error.
|
|
|
830 *
|
|
|
831 * Side effects: Closes the connection on error.
|
|
|
832 */
|
|
|
833 int
|
|
272
|
834 pop_last (popserver server)
|
|
118
|
835 {
|
|
|
836 char *fromserver;
|
|
|
837
|
|
|
838 if (server->in_multi)
|
|
|
839 {
|
|
|
840 strcpy (pop_error, "In multi-line query in pop_last");
|
|
|
841 return (-1);
|
|
|
842 }
|
|
|
843
|
|
|
844 if (sendline (server, "LAST"))
|
|
|
845 return (-1);
|
|
|
846
|
|
272
|
847 if (! (fromserver = pop_getline (server)))
|
|
118
|
848 return (-1);
|
|
|
849
|
|
|
850 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
851 {
|
|
|
852 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
853 return (-1);
|
|
|
854 }
|
|
|
855 else if (strncmp (fromserver, "+OK ", 4))
|
|
|
856 {
|
|
|
857 strcpy (pop_error, "Unexpected response from server in pop_last");
|
|
|
858 pop_trash (server);
|
|
|
859 return (-1);
|
|
|
860 }
|
|
|
861 else
|
|
|
862 {
|
|
|
863 return (atoi (&fromserver[4]));
|
|
|
864 }
|
|
|
865 }
|
|
|
866
|
|
|
867 /*
|
|
|
868 * Function: pop_reset
|
|
|
869 *
|
|
|
870 * Purpose: Reset the server to its initial connect state
|
|
|
871 *
|
|
|
872 * Arguments:
|
|
|
873 * server The server.
|
|
|
874 *
|
|
|
875 * Return value: 0 for success, non-0 with error in pop_error
|
|
|
876 * otherwise.
|
|
|
877 *
|
|
|
878 * Side effects: Closes the connection on error.
|
|
|
879 */
|
|
|
880 int
|
|
272
|
881 pop_reset (popserver server)
|
|
118
|
882 {
|
|
|
883 if (pop_retrieve_flush (server))
|
|
|
884 {
|
|
|
885 return (-1);
|
|
|
886 }
|
|
|
887
|
|
|
888 if (sendline (server, "RSET") || getok (server))
|
|
|
889 return (-1);
|
|
|
890
|
|
|
891 return (0);
|
|
|
892 }
|
|
|
893
|
|
|
894 /*
|
|
|
895 * Function: pop_quit
|
|
|
896 *
|
|
|
897 * Purpose: Quit the connection to the server,
|
|
|
898 *
|
|
|
899 * Arguments:
|
|
|
900 * server The server to quit.
|
|
|
901 *
|
|
|
902 * Return value: 0 for success, non-zero otherwise with error in
|
|
|
903 * pop_error.
|
|
|
904 *
|
|
|
905 * Side Effects: The popserver passed in is unusable after this
|
|
|
906 * function is called, even if an error occurs.
|
|
|
907 */
|
|
|
908 int
|
|
272
|
909 pop_quit (popserver server)
|
|
118
|
910 {
|
|
|
911 int ret = 0;
|
|
|
912
|
|
|
913 if (server->file >= 0)
|
|
|
914 {
|
|
|
915 if (pop_retrieve_flush (server))
|
|
|
916 {
|
|
|
917 ret = -1;
|
|
|
918 }
|
|
|
919
|
|
|
920 if (sendline (server, "QUIT") || getok (server))
|
|
|
921 {
|
|
|
922 ret = -1;
|
|
|
923 }
|
|
|
924
|
|
|
925 close (server->file);
|
|
|
926 }
|
|
|
927
|
|
|
928 if (server->buffer)
|
|
|
929 free (server->buffer);
|
|
|
930 free ((char *) server);
|
|
|
931
|
|
|
932 return (ret);
|
|
|
933 }
|
|
|
934
|
|
|
935 #ifdef WINDOWSNT
|
|
|
936 static int have_winsock = 0;
|
|
|
937 #endif
|
|
|
938
|
|
|
939 /*
|
|
|
940 * Function: socket_connection
|
|
|
941 *
|
|
|
942 * Purpose: Opens the network connection with the mail host, without
|
|
|
943 * doing any sort of I/O with it or anything.
|
|
|
944 *
|
|
|
945 * Arguments:
|
|
|
946 * host The host to which to connect.
|
|
|
947 * flags Option flags.
|
|
|
948 *
|
|
|
949 * Return value: A file descriptor indicating the connection, or -1
|
|
|
950 * indicating failure, in which case an error has been copied
|
|
|
951 * into pop_error.
|
|
|
952 */
|
|
|
953 static int
|
|
272
|
954 socket_connection (char *host, int flags)
|
|
118
|
955 {
|
|
|
956 struct hostent *hostent;
|
|
|
957 struct servent *servent;
|
|
|
958 struct sockaddr_in addr;
|
|
|
959 char found_port = 0;
|
|
|
960 char *service;
|
|
|
961 int sock;
|
|
|
962 #ifdef KERBEROS
|
|
|
963 #ifdef KRB5
|
|
|
964 krb5_error_code rem;
|
|
|
965 krb5_ccache ccdef;
|
|
|
966 krb5_principal client, server;
|
|
|
967 krb5_error *err_ret;
|
|
|
968 register char *cp;
|
|
|
969 #else
|
|
|
970 KTEXT ticket;
|
|
|
971 MSG_DAT msg_data;
|
|
|
972 CREDENTIALS cred;
|
|
|
973 Key_schedule schedule;
|
|
|
974 int rem;
|
|
|
975 #endif /* KRB5 */
|
|
|
976 #endif /* KERBEROS */
|
|
|
977
|
|
|
978 int try_count = 0;
|
|
|
979
|
|
|
980 #ifdef WINDOWSNT
|
|
|
981 {
|
|
|
982 WSADATA winsockData;
|
|
|
983 if (WSAStartup (0x101, &winsockData) == 0)
|
|
|
984 have_winsock = 1;
|
|
|
985 }
|
|
|
986 #endif
|
|
|
987
|
|
|
988 do
|
|
|
989 {
|
|
|
990 hostent = gethostbyname (host);
|
|
|
991 try_count++;
|
|
259
|
992 if ((! hostent)
|
|
|
993 #ifndef BROKEN_CYGWIN
|
|
|
994 && ((h_errno != TRY_AGAIN) || (try_count == 5))
|
|
|
995 #endif
|
|
|
996 )
|
|
118
|
997 {
|
|
|
998 strcpy (pop_error, "Could not determine POP server's address");
|
|
|
999 return (-1);
|
|
|
1000 }
|
|
|
1001 } while (! hostent);
|
|
|
1002
|
|
272
|
1003 memset (&addr, 0, sizeof (addr));
|
|
118
|
1004 addr.sin_family = AF_INET;
|
|
|
1005
|
|
|
1006 #ifdef KERBEROS
|
|
|
1007 service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE;
|
|
|
1008 #else
|
|
|
1009 service = POP_SERVICE;
|
|
|
1010 #endif
|
|
|
1011
|
|
|
1012 #ifdef HESIOD
|
|
|
1013 if (! (flags & POP_NO_HESIOD))
|
|
|
1014 {
|
|
|
1015 servent = hes_getservbyname (service, "tcp");
|
|
|
1016 if (servent)
|
|
|
1017 {
|
|
|
1018 addr.sin_port = servent->s_port;
|
|
|
1019 found_port = 1;
|
|
|
1020 }
|
|
|
1021 }
|
|
|
1022 #endif
|
|
|
1023 if (! found_port)
|
|
|
1024 {
|
|
|
1025 servent = getservbyname (service, "tcp");
|
|
|
1026 if (servent)
|
|
|
1027 {
|
|
|
1028 addr.sin_port = servent->s_port;
|
|
|
1029 }
|
|
|
1030 else
|
|
|
1031 {
|
|
|
1032 #ifdef KERBEROS
|
|
|
1033 addr.sin_port = htons ((flags & POP_NO_KERBEROS) ?
|
|
|
1034 POP_PORT : KPOP_PORT);
|
|
|
1035 #else
|
|
|
1036 addr.sin_port = htons (POP_PORT);
|
|
|
1037 #endif
|
|
|
1038 }
|
|
|
1039 }
|
|
|
1040
|
|
|
1041 #define SOCKET_ERROR "Could not create socket for POP connection: "
|
|
|
1042
|
|
|
1043 sock = socket (PF_INET, SOCK_STREAM, 0);
|
|
|
1044 if (sock < 0)
|
|
|
1045 {
|
|
|
1046 strcpy (pop_error, SOCKET_ERROR);
|
|
|
1047 strncat (pop_error, strerror (errno),
|
|
|
1048 ERROR_MAX - sizeof (SOCKET_ERROR));
|
|
|
1049 return (-1);
|
|
|
1050
|
|
|
1051 }
|
|
|
1052
|
|
|
1053 while (*hostent->h_addr_list)
|
|
|
1054 {
|
|
272
|
1055 memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length);
|
|
118
|
1056 if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr)))
|
|
|
1057 break;
|
|
|
1058 hostent->h_addr_list++;
|
|
|
1059 }
|
|
|
1060
|
|
|
1061 #define CONNECT_ERROR "Could not connect to POP server: "
|
|
|
1062
|
|
|
1063 if (! *hostent->h_addr_list)
|
|
|
1064 {
|
|
|
1065 CLOSESOCKET (sock);
|
|
|
1066 strcpy (pop_error, CONNECT_ERROR);
|
|
|
1067 strncat (pop_error, strerror (errno),
|
|
|
1068 ERROR_MAX - sizeof (CONNECT_ERROR));
|
|
|
1069 return (-1);
|
|
|
1070
|
|
|
1071 }
|
|
|
1072
|
|
|
1073 #ifdef KERBEROS
|
|
|
1074 #define KRB_ERROR "Kerberos error connecting to POP server: "
|
|
|
1075 if (! (flags & POP_NO_KERBEROS))
|
|
|
1076 {
|
|
|
1077 #ifdef KRB5
|
|
|
1078 krb5_init_ets ();
|
|
|
1079
|
|
|
1080 if (rem = krb5_cc_default (&ccdef))
|
|
|
1081 {
|
|
|
1082 krb5error:
|
|
|
1083 strcpy (pop_error, KRB_ERROR);
|
|
|
1084 strncat (pop_error, error_message (rem),
|
|
|
1085 ERROR_MAX - sizeof(KRB_ERROR));
|
|
|
1086 CLOSESOCKET (sock);
|
|
|
1087 return (-1);
|
|
|
1088 }
|
|
|
1089
|
|
|
1090 if (rem = krb5_cc_get_principal (ccdef, &client))
|
|
|
1091 {
|
|
|
1092 goto krb5error;
|
|
|
1093 }
|
|
|
1094
|
|
|
1095 for (cp = hostent->h_name; *cp; cp++)
|
|
|
1096 {
|
|
|
1097 if (isupper (*cp))
|
|
|
1098 {
|
|
|
1099 *cp = tolower (*cp);
|
|
|
1100 }
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE,
|
|
|
1104 FALSE, &server))
|
|
|
1105 {
|
|
|
1106 goto krb5error;
|
|
|
1107 }
|
|
|
1108
|
|
|
1109 rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server,
|
|
|
1110 AP_OPTS_MUTUAL_REQUIRED,
|
|
|
1111 0, /* no checksum */
|
|
|
1112 0, /* no creds, use ccache instead */
|
|
|
1113 ccdef,
|
|
|
1114 0, /* don't need seq # */
|
|
|
1115 0, /* don't need subsession key */
|
|
|
1116 &err_ret,
|
|
|
1117 0); /* don't need reply */
|
|
|
1118 krb5_free_principal (server);
|
|
|
1119 if (rem)
|
|
|
1120 {
|
|
|
1121 if (err_ret && err_ret->text.length)
|
|
|
1122 {
|
|
|
1123 strcpy (pop_error, KRB_ERROR);
|
|
|
1124 strncat (pop_error, error_message (rem),
|
|
|
1125 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1126 strncat (pop_error, " [server says '",
|
|
|
1127 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1128 strncat (pop_error, err_ret->text.data,
|
|
|
1129 min (ERROR_MAX - strlen (pop_error) - 1,
|
|
|
1130 err_ret->text.length));
|
|
|
1131 strncat (pop_error, "']",
|
|
|
1132 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1133 }
|
|
|
1134 else
|
|
|
1135 {
|
|
|
1136 strcpy (pop_error, KRB_ERROR);
|
|
|
1137 strncat (pop_error, error_message (rem),
|
|
|
1138 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1139 }
|
|
|
1140 if (err_ret)
|
|
|
1141 krb5_free_error (err_ret);
|
|
|
1142
|
|
|
1143 CLOSESOCKET (sock);
|
|
|
1144 return (-1);
|
|
|
1145 }
|
|
|
1146 #else /* ! KRB5 */
|
|
|
1147 ticket = (KTEXT) malloc (sizeof (KTEXT_ST));
|
|
|
1148 rem = krb_sendauth (0L, sock, ticket, "pop", hostent->h_name,
|
|
|
1149 (char *) krb_realmofhost (hostent->h_name),
|
|
|
1150 (unsigned long) 0, &msg_data, &cred, schedule,
|
|
|
1151 (struct sockaddr_in *) 0,
|
|
|
1152 (struct sockaddr_in *) 0,
|
|
|
1153 "KPOPV0.1");
|
|
|
1154 free ((char *) ticket);
|
|
|
1155 if (rem != KSUCCESS)
|
|
|
1156 {
|
|
|
1157 strcpy (pop_error, KRB_ERROR);
|
|
|
1158 strncat (pop_error, krb_err_txt[rem],
|
|
|
1159 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1160 CLOSESOCKET (sock);
|
|
|
1161 return (-1);
|
|
|
1162 }
|
|
|
1163 #endif /* KRB5 */
|
|
|
1164 }
|
|
|
1165 #endif /* KERBEROS */
|
|
|
1166
|
|
|
1167 return (sock);
|
|
|
1168 } /* socket_connection */
|
|
|
1169
|
|
|
1170 /*
|
|
272
|
1171 * Function: pop_getline
|
|
118
|
1172 *
|
|
|
1173 * Purpose: Get a line of text from the connection and return a
|
|
|
1174 * pointer to it. The carriage return and linefeed at the end of
|
|
|
1175 * the line are stripped, but periods at the beginnings of lines
|
|
|
1176 * are NOT dealt with in any special way.
|
|
|
1177 *
|
|
|
1178 * Arguments:
|
|
|
1179 * server The server from which to get the line of text.
|
|
|
1180 *
|
|
|
1181 * Returns: A non-null pointer if successful, or a null pointer on any
|
|
|
1182 * error, with an error message copied into pop_error.
|
|
|
1183 *
|
|
272
|
1184 * Notes: The line returned is overwritten with each call to pop_getline.
|
|
118
|
1185 *
|
|
|
1186 * Side effects: Closes the connection on error.
|
|
|
1187 */
|
|
|
1188 static char *
|
|
272
|
1189 pop_getline (popserver server)
|
|
118
|
1190 {
|
|
|
1191 #define GETLINE_ERROR "Error reading from server: "
|
|
|
1192
|
|
|
1193 int ret;
|
|
|
1194 int search_offset = 0;
|
|
|
1195
|
|
|
1196 if (server->data)
|
|
|
1197 {
|
|
|
1198 char *cp = find_crlf (server->buffer + server->buffer_index);
|
|
|
1199 if (cp)
|
|
|
1200 {
|
|
|
1201 int found;
|
|
|
1202 int data_used;
|
|
|
1203
|
|
|
1204 found = server->buffer_index;
|
|
|
1205 data_used = (cp + 2) - server->buffer - found;
|
|
|
1206
|
|
|
1207 *cp = '\0'; /* terminate the string to be returned */
|
|
|
1208 server->data -= data_used;
|
|
|
1209 server->buffer_index += data_used;
|
|
|
1210
|
|
|
1211 if (pop_debug)
|
|
|
1212 fprintf (stderr, "<<< %s\n", server->buffer + found);
|
|
|
1213 return (server->buffer + found);
|
|
|
1214 }
|
|
|
1215 else
|
|
|
1216 {
|
|
272
|
1217 memcpy (server->buffer,
|
|
|
1218 server->buffer + server->buffer_index,
|
|
|
1219 server->data);
|
|
118
|
1220 /* Record the fact that we've searched the data already in
|
|
|
1221 the buffer for a CRLF, so that when we search below, we
|
|
|
1222 don't have to search the same data twice. There's a "-
|
|
|
1223 1" here to account for the fact that the last character
|
|
|
1224 of the data we have may be the CR of a CRLF pair, of
|
|
|
1225 which we haven't read the second half yet, so we may have
|
|
|
1226 to search it again when we read more data. */
|
|
|
1227 search_offset = server->data - 1;
|
|
|
1228 server->buffer_index = 0;
|
|
|
1229 }
|
|
|
1230 }
|
|
|
1231 else
|
|
|
1232 {
|
|
|
1233 server->buffer_index = 0;
|
|
|
1234 }
|
|
|
1235
|
|
|
1236 while (1)
|
|
|
1237 {
|
|
|
1238 /* There's a "- 1" here to leave room for the null that we put
|
|
|
1239 at the end of the read data below. We put the null there so
|
|
|
1240 that find_crlf knows where to stop when we call it. */
|
|
|
1241 if (server->data == server->buffer_size - 1)
|
|
|
1242 {
|
|
|
1243 server->buffer_size += GETLINE_INCR;
|
|
|
1244 server->buffer = (char *)realloc (server->buffer, server->buffer_size);
|
|
|
1245 if (! server->buffer)
|
|
|
1246 {
|
|
272
|
1247 strcpy (pop_error, "Out of memory in pop_getline");
|
|
118
|
1248 pop_trash (server);
|
|
|
1249 return (0);
|
|
|
1250 }
|
|
|
1251 }
|
|
|
1252 ret = RECV (server->file, server->buffer + server->data,
|
|
|
1253 server->buffer_size - server->data - 1, 0);
|
|
|
1254 if (ret < 0)
|
|
|
1255 {
|
|
|
1256 strcpy (pop_error, GETLINE_ERROR);
|
|
|
1257 strncat (pop_error, strerror (errno),
|
|
|
1258 ERROR_MAX - sizeof (GETLINE_ERROR));
|
|
|
1259 pop_trash (server);
|
|
|
1260 return (0);
|
|
|
1261 }
|
|
|
1262 else if (ret == 0)
|
|
|
1263 {
|
|
272
|
1264 strcpy (pop_error, "Unexpected EOF from server in pop_getline");
|
|
118
|
1265 pop_trash (server);
|
|
|
1266 return (0);
|
|
|
1267 }
|
|
|
1268 else
|
|
|
1269 {
|
|
|
1270 char *cp;
|
|
|
1271 server->data += ret;
|
|
|
1272 server->buffer[server->data] = '\0';
|
|
|
1273
|
|
|
1274 cp = find_crlf (server->buffer + search_offset);
|
|
|
1275 if (cp)
|
|
|
1276 {
|
|
|
1277 int data_used = (cp + 2) - server->buffer;
|
|
|
1278 *cp = '\0';
|
|
|
1279 server->data -= data_used;
|
|
|
1280 server->buffer_index = data_used;
|
|
|
1281
|
|
|
1282 if (pop_debug)
|
|
|
1283 fprintf (stderr, "<<< %s\n", server->buffer);
|
|
|
1284 return (server->buffer);
|
|
|
1285 }
|
|
|
1286 search_offset += ret;
|
|
|
1287 }
|
|
|
1288 }
|
|
|
1289
|
|
|
1290 /* NOTREACHED */
|
|
|
1291 }
|
|
|
1292
|
|
|
1293 /*
|
|
|
1294 * Function: sendline
|
|
|
1295 *
|
|
|
1296 * Purpose: Sends a line of text to the POP server. The line of text
|
|
|
1297 * passed into this function should NOT have the carriage return
|
|
|
1298 * and linefeed on the end of it. Periods at beginnings of lines
|
|
|
1299 * will NOT be treated specially by this function.
|
|
|
1300 *
|
|
|
1301 * Arguments:
|
|
|
1302 * server The server to which to send the text.
|
|
|
1303 * line The line of text to send.
|
|
|
1304 *
|
|
|
1305 * Return value: Upon successful completion, a value of 0 will be
|
|
|
1306 * returned. Otherwise, a non-zero value will be returned, and
|
|
|
1307 * an error will be copied into pop_error.
|
|
|
1308 *
|
|
|
1309 * Side effects: Closes the connection on error.
|
|
|
1310 */
|
|
|
1311 static int
|
|
272
|
1312 sendline (popserver server, char *line)
|
|
118
|
1313 {
|
|
|
1314 #define SENDLINE_ERROR "Error writing to POP server: "
|
|
|
1315 int ret;
|
|
|
1316
|
|
|
1317 ret = fullwrite (server->file, line, strlen (line));
|
|
|
1318 if (ret >= 0)
|
|
|
1319 { /* 0 indicates that a blank line was written */
|
|
|
1320 ret = fullwrite (server->file, "\r\n", 2);
|
|
|
1321 }
|
|
|
1322
|
|
|
1323 if (ret < 0)
|
|
|
1324 {
|
|
|
1325 pop_trash (server);
|
|
|
1326 strcpy (pop_error, SENDLINE_ERROR);
|
|
|
1327 strncat (pop_error, strerror (errno),
|
|
|
1328 ERROR_MAX - sizeof (SENDLINE_ERROR));
|
|
|
1329 return (ret);
|
|
|
1330 }
|
|
|
1331
|
|
|
1332 if (pop_debug)
|
|
|
1333 fprintf (stderr, ">>> %s\n", line);
|
|
|
1334
|
|
|
1335 return (0);
|
|
|
1336 }
|
|
|
1337
|
|
|
1338 /*
|
|
|
1339 * Procedure: fullwrite
|
|
|
1340 *
|
|
|
1341 * Purpose: Just like write, but keeps trying until the entire string
|
|
|
1342 * has been written.
|
|
|
1343 *
|
|
|
1344 * Return value: Same as write. Pop_error is not set.
|
|
|
1345 */
|
|
|
1346 static int
|
|
272
|
1347 fullwrite (int fd, char *buf, int nbytes)
|
|
118
|
1348 {
|
|
|
1349 char *cp;
|
|
|
1350 int ret;
|
|
|
1351
|
|
|
1352 cp = buf;
|
|
|
1353 while ((ret = SEND (fd, cp, nbytes, 0)) > 0)
|
|
|
1354 {
|
|
|
1355 cp += ret;
|
|
|
1356 nbytes -= ret;
|
|
|
1357 }
|
|
|
1358
|
|
|
1359 return (ret);
|
|
|
1360 }
|
|
|
1361
|
|
|
1362 /*
|
|
|
1363 * Procedure getok
|
|
|
1364 *
|
|
|
1365 * Purpose: Reads a line from the server. If the return indicator is
|
|
|
1366 * positive, return with a zero exit status. If not, return with
|
|
|
1367 * a negative exit status.
|
|
|
1368 *
|
|
|
1369 * Arguments:
|
|
|
1370 * server The server to read from.
|
|
|
1371 *
|
|
|
1372 * Returns: 0 for success, else for failure and puts error in pop_error.
|
|
|
1373 *
|
|
|
1374 * Side effects: On failure, may make the connection unusable.
|
|
|
1375 */
|
|
|
1376 static int
|
|
272
|
1377 getok (popserver server)
|
|
118
|
1378 {
|
|
|
1379 char *fromline;
|
|
|
1380
|
|
272
|
1381 if (! (fromline = pop_getline (server)))
|
|
118
|
1382 {
|
|
|
1383 return (-1);
|
|
|
1384 }
|
|
|
1385
|
|
|
1386 if (! strncmp (fromline, "+OK", 3))
|
|
|
1387 return (0);
|
|
|
1388 else if (! strncmp (fromline, "-ERR", 4))
|
|
|
1389 {
|
|
|
1390 strncpy (pop_error, fromline, ERROR_MAX);
|
|
|
1391 pop_error[ERROR_MAX-1] = '\0';
|
|
|
1392 return (-1);
|
|
|
1393 }
|
|
|
1394 else
|
|
|
1395 {
|
|
|
1396 strcpy (pop_error,
|
|
|
1397 "Unexpected response from server; expecting +OK or -ERR");
|
|
|
1398 pop_trash (server);
|
|
|
1399 return (-1);
|
|
|
1400 }
|
|
|
1401 }
|
|
|
1402
|
|
|
1403 #if 0
|
|
|
1404 /*
|
|
|
1405 * Function: gettermination
|
|
|
1406 *
|
|
|
1407 * Purpose: Gets the next line and verifies that it is a termination
|
|
|
1408 * line (nothing but a dot).
|
|
|
1409 *
|
|
|
1410 * Return value: 0 on success, non-zero with pop_error set on error.
|
|
|
1411 *
|
|
|
1412 * Side effects: Closes the connection on error.
|
|
|
1413 */
|
|
|
1414 static int
|
|
272
|
1415 gettermination (popserver server)
|
|
118
|
1416 {
|
|
|
1417 char *fromserver;
|
|
|
1418
|
|
272
|
1419 fromserver = pop_getline (server);
|
|
118
|
1420 if (! fromserver)
|
|
|
1421 return (-1);
|
|
|
1422
|
|
|
1423 if (strcmp (fromserver, "."))
|
|
|
1424 {
|
|
|
1425 strcpy (pop_error,
|
|
|
1426 "Unexpected response from server in gettermination");
|
|
|
1427 pop_trash (server);
|
|
|
1428 return (-1);
|
|
|
1429 }
|
|
|
1430
|
|
|
1431 return (0);
|
|
|
1432 }
|
|
|
1433 #endif
|
|
|
1434
|
|
|
1435 /*
|
|
|
1436 * Function pop_close
|
|
|
1437 *
|
|
|
1438 * Purpose: Close a pop connection, sending a "RSET" command to try to
|
|
|
1439 * preserve any changes that were made and a "QUIT" command to
|
|
|
1440 * try to get the server to quit, but ignoring any responses that
|
|
|
1441 * are received.
|
|
|
1442 *
|
|
|
1443 * Side effects: The server is unusable after this function returns.
|
|
|
1444 * Changes made to the maildrop since the session was started (or
|
|
|
1445 * since the last pop_reset) may be lost.
|
|
|
1446 */
|
|
|
1447 void
|
|
272
|
1448 pop_close (popserver server)
|
|
118
|
1449 {
|
|
|
1450 pop_trash (server);
|
|
|
1451 free ((char *) server);
|
|
|
1452
|
|
|
1453 return;
|
|
|
1454 }
|
|
|
1455
|
|
|
1456 /*
|
|
|
1457 * Function: pop_trash
|
|
|
1458 *
|
|
|
1459 * Purpose: Like pop_close or pop_quit, but doesn't deallocate the
|
|
|
1460 * memory associated with the server. It is legal to call
|
|
|
1461 * pop_close or pop_quit after this function has been called.
|
|
|
1462 */
|
|
|
1463 static void
|
|
272
|
1464 pop_trash (popserver server)
|
|
118
|
1465 {
|
|
|
1466 if (server->file >= 0)
|
|
|
1467 {
|
|
|
1468 /* avoid recursion; sendline can call pop_trash */
|
|
|
1469 if (server->trash_started)
|
|
|
1470 return;
|
|
|
1471 server->trash_started = 1;
|
|
|
1472
|
|
|
1473 sendline (server, "RSET");
|
|
|
1474 sendline (server, "QUIT");
|
|
|
1475
|
|
|
1476 CLOSESOCKET (server->file);
|
|
|
1477 server->file = -1;
|
|
|
1478 if (server->buffer)
|
|
|
1479 {
|
|
|
1480 free (server->buffer);
|
|
|
1481 server->buffer = 0;
|
|
|
1482 }
|
|
|
1483 }
|
|
|
1484
|
|
|
1485 #ifdef WINDOWSNT
|
|
|
1486 if (have_winsock)
|
|
|
1487 WSACleanup ();
|
|
|
1488 #endif
|
|
|
1489 }
|
|
|
1490
|
|
|
1491 /* Return a pointer to the first CRLF in IN_STRING,
|
|
|
1492 or 0 if it does not contain one. */
|
|
|
1493
|
|
|
1494 static char *
|
|
272
|
1495 find_crlf (char *in_string)
|
|
118
|
1496 {
|
|
|
1497 while (1)
|
|
|
1498 {
|
|
|
1499 if (! *in_string)
|
|
|
1500 return (0);
|
|
|
1501 else if (*in_string == '\r')
|
|
|
1502 {
|
|
|
1503 if (*++in_string == '\n')
|
|
|
1504 return (in_string - 1);
|
|
|
1505 }
|
|
|
1506 else
|
|
|
1507 in_string++;
|
|
|
1508 }
|
|
|
1509 /* NOTREACHED */
|
|
|
1510 }
|
|
|
1511
|
|
|
1512 #endif /* MAIL_USE_POP */
|
