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