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
|
/*
* ip-win32.c
*
* Copyright (c) 2002 Dug Song <dugsong@monkey.org>
*
* $Id: ip-win32.c 547 2005-01-25 21:30:40Z dugsong $
*/
#include "config.h"
#include <ws2tcpip.h>
#include <errno.h>
#include <stdlib.h>
#include "dnet.h"
struct ip_handle {
WSADATA wsdata;
SOCKET fd;
struct sockaddr_in sin;
};
ip_t *
ip_open(void)
{
BOOL on;
ip_t *ip;
if ((ip = calloc(1, sizeof(*ip))) != NULL) {
if (WSAStartup(MAKEWORD(2, 2), &ip->wsdata) != 0) {
free(ip);
return (NULL);
}
if ((ip->fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) ==
INVALID_SOCKET)
return (ip_close(ip));
on = TRUE;
if (setsockopt(ip->fd, IPPROTO_IP, IP_HDRINCL,
(const char *)&on, sizeof(on)) == SOCKET_ERROR) {
SetLastError(ERROR_NETWORK_ACCESS_DENIED);
return (ip_close(ip));
}
ip->sin.sin_family = AF_INET;
ip->sin.sin_port = htons(666);
}
return (ip);
}
ssize_t
ip_send(ip_t *ip, const void *buf, size_t len)
{
struct ip_hdr *hdr = (struct ip_hdr *)buf;
ip->sin.sin_addr.s_addr = hdr->ip_src;
if ((len = sendto(ip->fd, (const char *)buf, len, 0,
(struct sockaddr *)&ip->sin, sizeof(ip->sin))) != SOCKET_ERROR)
return (len);
return (-1);
}
ip_t *
ip_close(ip_t *ip)
{
if (ip != NULL) {
WSACleanup();
if (ip->fd != INVALID_SOCKET)
closesocket(ip->fd);
free(ip);
}
return (NULL);
}
|