1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/* $Id: socket.c,v 1.1 2001/03/14 13:19:29 ltoetsch Exp $
*
* simple socket functions
*
* Copyright 2001 by Leopold T�tsch (lt@toetsch.at)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: socket.c,v $
* Revision 1.1 2001/03/14 13:19:29 ltoetsch
* Added pop3/imap4 mail support
*
*
*/
/*
* Exported Functions:
*
* int open_socket(char *machine, int port);
*
* open and connect to socket on machine:port
* returns fd on success or -1 on error
*
*
* int read_socket(int fd, char *buf, size_t size);
*
* read maximum size chars into buf
* returns n byte read, 0 on timeout, -1 on error
*
*
* int read_socket_match(int fd, char *buf, size_t size, char *match);
*
* read maximum size chars into buf and check if the start of line
* matches 'match'
* returns n on successful match, 0 on timeout/mismatch, -1 on error
*
*
* int write_socket(int fd, char *string);
*
* write string to socket fd
* returns n byte written, -1 on error
*
* with debuglevel 3, traffic on socket is logged
*
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include "debug.h"
#define TIMEOUT 2 /* 2 seconds timeout */
int open_socket(char *machine, int port)
{
struct hostent *addr;
struct sockaddr_in s;
int fd;
addr = gethostbyname (machine);
if (addr)
memcpy (&s.sin_addr, addr->h_addr, sizeof (struct in_addr));
else
return -1;
fd = socket (AF_INET, SOCK_STREAM, 0);
if (fd < 0)
return -1;
s.sin_family = AF_INET;
s.sin_port = htons (port);
if (connect (fd, (struct sockaddr *)&s, sizeof (s)) < 0)
return -1;
return fd;
}
int read_socket(int fd, char *buf, size_t size)
{
fd_set readfds;
struct timeval tv;
int n = 0;
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
tv.tv_sec = TIMEOUT;
tv.tv_usec = 0;
if (select(fd+1, &readfds, NULL, NULL, &tv) > 0)
n = read(fd, buf, size);
if (n >= 0)
buf[n] = '\0';
else
buf[0] = '\0';
sockdebug("<(%d),%s", n, buf);
return n;
}
int read_socket_match(int fd, char *buf, size_t size, char *match)
{
int n = read_socket(fd, buf, size);
int len;
if (n <= 0)
return n;
len = strlen(match);
if (n >= len && memcmp(buf, match, len) == 0)
return n;
return 0;
}
static char *del_pass(char *s)
{
char *p;
/* del pop3 pass from log */
if (memcmp(s, "PASS ", 5) == 0)
for (p = s+5; *p && *p != '\r'; p++)
*p = '*';
/* del imap4 pass from log */
else if (memcmp(s, ". LOGIN", 7) == 0)
for (p = s + strlen(s)-3 ; p > s && *p != ' '; p--)
*p = '*';
return s;
}
int write_socket(int fd, char *buf)
{
int n = write(fd, buf, strlen(buf));
sockdebug(">(%d),%s", n, del_pass(buf));
return n;
}
|
