Date: Sun, 1 Jun 1997 16:01:36 +0200 From: =?iso-8859-1?Q?=C5ge_R=F8bekk?= <aagero@aage.priv.no> To: freebsd-hackers@freebsd.org Subject: IPDIVERT not working in 2.2.2 Message-ID: <19970601160135.28385@aage.priv.no>
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[-- Attachment #1 --]
I'm having problems getting IPDIVERT and friends working on
FreeBSD-2.2.2. When the kernel has booted and the drivers are
initialized, the kernel says
IP packet filtering initialized, divert enabled, unlimited logging
as expected. However, binding to a divert socket and read()ing gives
no data no matter what i try. The exact same setup works perfectly
fine in -CURRENT, although that is on another machine. The 2.2.2 box
has 2 vx network cards, but I do not think that the divert layer can
be affected by such a low-level layer. If someone could build and
test the extremely-crude and high-speed hacked together divert test
program attached to this mail, perhaps we could narrow out what i've
missed:
cc diverttest.c -o diverttest
ipfw add 00001 divert 32768 ip from any to any via <your-interface>
./diverttest 32768
any inbound traffic should be displayed as
read nn bytes
-aage
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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define BUFFSIZ 1600 /* should be MTU perhaps? */
int
main(int argc, char **argv)
{
int divertsock, port, rdsz;
struct sockaddr_in addr;
char *buff;
if(argc < 2) {
fprintf(stderr, "%s port\n", argv[0]);
exit(1);
}
if((divertsock = socket(PF_INET, SOCK_RAW, IPPROTO_DIVERT)) == -1) {
perror("socket");
exit(1);
}
port = atoi(argv[1]);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = ntohs(port);
if(bind(divertsock, (struct sockaddr *)&addr, sizeof(struct sockaddr_in)) < 0) {
perror("bind");
exit(1);
}
if((buff = malloc(BUFFSIZ)) == NULL) {
fprintf(stderr, "malloc error\n");
exit(1);
}
for(;;) {
rdsz = read(divertsock, buff, BUFFSIZ);
fprintf(stderr, "read %d bytes\n", rdsz);
}
return 0; /* Just to shut up gcc */
}
help
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