1
2 /*
3 * (C)opyright 2000 Darren Reed.
4 *
5 * See the IPFILTER.LICENCE file for details on licencing.
6 *
7 * WARNING: Attempting to use this .c file on HP-UX 11.00 will cause the
8 * system to crash.
9 */
10 #include <sys/param.h>
11 #include <sys/types.h>
12 #include <sys/socket.h>
13 #include <sys/ioctl.h>
14
15 #include <net/if.h>
16 #include <netinet/in.h>
17 #include <netinet/in_systm.h>
18 #include <netinet/ip.h>
19 #include <netinet/if_ether.h>
20 #include <netinet/ip_var.h>
21 #include <netinet/udp.h>
22 #include <netinet/udp_var.h>
23 #include <netinet/tcp.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <unistd.h>
27 #include <stdlib.h>
28 #include <errno.h>
29 #include "ipsend.h"
30
31
32
33 int
initdevice(char * device,int tout)34 initdevice(char *device, int tout)
35 {
36 struct sockaddr s;
37 struct ifreq ifr;
38 int fd;
39
40 memset(&ifr, 0, sizeof(ifr));
41 strncpy(ifr.ifr_name, device, sizeof ifr.ifr_name);
42
43 if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
44 {
45 perror("socket(AF_INET, SOCK_RAW, IPPROTO_RAW)");
46 return (-1);
47 }
48
49 if (ioctl(fd, SIOCGIFADDR, &ifr) == -1)
50 {
51 perror("ioctl SIOCGIFADDR");
52 return (-1);
53 }
54
55 bzero((char *)&s, sizeof(s));
56 s.sa_family = AF_INET;
57 bcopy(&ifr.ifr_addr, s.sa_data, 4);
58 if (bind(fd, &s, sizeof(s)) == -1)
59 perror("bind");
60 return (fd);
61 }
62
63
64 /*
65 * output an IP packet
66 */
sendip(int fd,char * pkt,int len)67 int sendip(int fd, char *pkt, int len)
68 {
69 struct ether_header *eh;
70 struct sockaddr_in sin;
71
72 eh = (struct ether_header *)pkt;
73 bzero((char *)&sin, sizeof(sin));
74 sin.sin_family = AF_INET;
75 pkt += 14;
76 len -= 14;
77 bcopy(pkt + 12, (char *)&sin.sin_addr, 4);
78
79 if (sendto(fd, pkt, len, 0, &sin, sizeof(sin)) == -1)
80 {
81 perror("send");
82 return (-1);
83 }
84
85 return (len);
86 }
87