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/*
* (C)opyright 1998 Darren Reed. (from tcplog)
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#include <stdio.h>
#include <strings.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netdnet/dli_var.h>
static struct dli_devid dli_devid;
int initdevice(device, sport, tout)
char *device;
int sport, tout;
{
u_char *s;
int fd;
fd = socket(AF_DLI, SOCK_DGRAM, 0);
if (fd == -1)
perror("socket(AF_DLI,SOCK_DGRAM)");
else {
strncpy(dli_devid.dli_devname, device, DLI_DEVSIZE);
dli_devid.dli_devname[DLI_DEVSIZE] ='\0';
for (s = dli_devid.dli_devname; *s && isalpha((char)*s); s++)
;
if (*s && isdigit((char)*s)) {
dli_devid.dli_devnumber = atoi(s);
}
}
return fd;
}
/*
* output an IP packet onto a fd opened for /dev/bpf
*/
int sendip(fd, pkt, len)
int fd, len;
char *pkt;
{
struct sockaddr_dl dl;
struct sockaddr_edl *edl = &dl.choose_addr.dli_eaddr;
dl.dli_family = AF_DLI;
dl.dli_substructype = DLI_ETHERNET;
bcopy((char *)&dli_devid, (char *)&dl.dli_device, sizeof(dli_devid));
bcopy(pkt, edl->dli_target, DLI_EADDRSIZE);
bcopy(pkt, edl->dli_dest, DLI_EADDRSIZE);
bcopy(pkt + DLI_EADDRSIZE * 2, (char *)&edl->dli_protype, 2);
edl->dli_ioctlflg = 0;
if (sendto(fd, pkt, len, 0, (struct sockaddr *)&dl, sizeof(dl)) == -1)
{
perror("send");
return -1;
}
return len;
}
char *strdup(str)
char *str;
{
char *s;
if ((s = (char *)malloc(strlen(str) + 1)))
return strcpy(s, str);
return NULL;
}
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