Date: Fri, 17 Mar 2000 15:03:18 -0800 (PST) From: Archie Cobbs <archie@whistle.com> To: freebsd-current@freebsd.org Subject: ICMP socket weirdness Message-ID: <200003172303.PAA70386@bubba.whistle.com>
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Can someone explain the weird behavior I'm seeing from the program below?? When the program is run, if you ping the IP address from the local machine, it sees packets. However, if you ping it from a remote machine, it doesn't see packets. This is on a 3.4-REL machine.. it also happens on a 4.0-current machine built on approx Feb. 2. -Archie ___________________________________________________________________________ Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com #include <sys/param.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <err.h> int main(int ac, char *av[]) { struct sockaddr_in a; u_char buf[8192]; int r, s; memset(&a, 0, sizeof(a)); a.sin_family = AF_INET; a.sin_len = sizeof(a); if (ac != 2 || inet_aton(av[1], &a.sin_addr) == 0) errx(1, "Usage: stest ipaddr"); if ((s = socket(PF_INET, SOCK_RAW, IPPROTO_ICMP)) == -1) err(1, "socket"); if (bind(s, (struct sockaddr *)&a, sizeof(a)) == -1) err(1, "bind"); while ((r = read(s, buf, sizeof(buf))) > 0) printf("Rec'd %d byte packet\n", r); if (r != 0) err(1, "read"); return (0); } To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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