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
|
/* ========================================================================
* Copyright 1988-2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* Program: Operating-system dependent routines -- MS-DOS (PC/TCP) version
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 11 April 1989
* Last Edited: 30 August 2006
*/
/* Private function prototypes */
#include "tcp_dos.h" /* must be before osdep includes tcp.h */
#include "mail.h"
#include "osdep.h"
#include <time.h>
#include <errno.h>
#include <fcntl.h>
#include <sys\stat.h>
#include <sys\timeb.h>
#include <4bsddefs.h>
#include <sys\socket.h>
#include <errno.h>
#include <arpa\inet.h>
#include <netinet\in.h>
#include <netdb.h>
#include "misc.h"
#include "fs_dos.c"
#include "ftl_dos.c"
#include "nl_dos.c"
#include "env_dos.c"
#undef write
#include "tcp_dos.c"
/* Return my local host name
* Returns: my local host name
*/
char *mylocalhost (void)
{
if (!myLocalHost) { /* known yet */
char *s,tmp[MAILTMPLEN];
long myip;
/* see if known host name */
if (!gethostname (tmp,MAILTMPLEN-1)) s = tmp;
/* no, try IP address */
else if (myip = gethostid ()) {
struct in_addr in;
in.s_addr = myip;
sprintf (s = tmp,"[%s]",inet_ntoa (in));
}
/* older kernel, look harder. */
else if (getconf ("ifcust","ip-address",tmp+1,MAILTMPLEN-2)) {
*(s = tmp) = '['; /* wrap the brackets around it */
strcat (tmp,"]");
}
else s = "random-pc"; /* say what? */
myLocalHost = cpystr (s); /* record for subsequent use */
}
return myLocalHost;
}
/* Look up host address
* Accepts: pointer to pointer to host name
* socket address block
* Returns: non-zero with host address in socket, official host name in host;
* else NIL
*/
long lookuphost (char **host,struct sockaddr_in *sin)
{
long ret = -1;
char tmp[MAILTMPLEN];
struct hostent *hn = gethostbyname (lcase (strcpy (tmp,*host)));
if (!hn) return NIL; /* got a host name? */
*host = cpystr (hn->h_name); /* set official name */
/* copy host addresses */
memcpy (&sin->sin_addr,hn->h_addr,hn->h_length);
return T;
}
|
