Date: Tue, 27 Jun 2006 19:47:37 +0400 (MSD) From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: FreeBSD-gnats-submit@FreeBSD.org Cc: rwatson@FreeBSD.org, glebius@FreeBSD.org, andre@FreeBSD.org Subject: kern/99558: FreeBSD 6.1 can't send packets to INADDR_BROADCAST Message-ID: <20060627154737.EEAA615C4A@mail.heavennet.ru> Resent-Message-ID: <200606271710.k5RHALZ2001544@freefall.freebsd.org>
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>Number: 99558
>Category: kern
>Synopsis: FreeBSD 6.1 can't send packets to INADDR_BROADCAST
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jun 27 17:10:20 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Andrey V. Elsukov
>Release: FreeBSD 6.1
>Organization:
>Environment:
FreeBSD 6.1-PRERELEASE, 6.1-STABLE have this bug
FreeBSD 4.11-RELEASE, FreeBSD 5.4-STABLE, FreeBSD 5.5-RELEASE works ok.
>Description:
FreeBSD 6.1 can't send UDP Broadcast.
Here is simple test programm:
--- test.c ---
#include <stdio.h>
#include <err.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
int main(void)
{
int sock, val, ret;
struct sockaddr_in addr;
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0)
err(1, "socket()");
addr.sin_family = AF_INET;
addr.sin_port = htons(5000);
addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
val = 1;
ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
(const char*)&val, sizeof(val));
if (ret < 0)
err(2, "setsockopt()");
ret = sendto(sock, "test", 4, 0, (struct sockaddr*)&addr,
sizeof(addr));
if (ret != 4)
err(3, "sendto()");
close(sock);
return (0);
}
--- test.c ---
1. I've connect via PPTP tunnel and my host have default route.
[butcher@btr butcher]> ./test
[butcher@btr butcher]> sudo tcpdump -ni ng0 -XX udp port 5000
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ng0, link-type NULL (BSD loopback), capture size 96 bytes
19:25:32.169657 IP 192.168.3.6.53565 > 255.255.255.255.5000: UDP, length 4
0x0000: 0200 0000 4500 0020 241a 0000 4011 9305 ....E...$...@...
0x0010: c0a8 0306 ffff ffff d13d 1388 000c 6f88 .........=....o.
0x0020: 7465 7374 test
^C
Message was send, but via PPTP to default destination.
2. I've not connected to PPTP server and don't have default route.
[butcher@btr butcher]> netstat -rnf inet | grep default
[butcher@btr butcher]> ./test
test: sendto(): Network is unreachable
test programm was fail with error.
3. I have the default route.
[butcher@btr butcher]> sudo route add default server
add net default: gateway server
[butcher@btr butcher]> ./test
[butcher@btr butcher]> sudo tcpdump -ni nve0 -XX udp port 5000
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on nve0, link-type EN10MB (Ethernet), capture size 96 bytes
19:29:51.988429 IP 192.168.4.234.54134 > 255.255.255.255.5000: UDP, length 4
0x0000: 0080 4836 9531 4255 5443 4821 0800 4500 ..H6.1BUTCH!..E.
0x0010: 0020 2459 0000 4011 90e2 c0a8 04ea ffff ..$Y..@.........
0x0020: ffff d376 1388 000c 6b6b 7465 7374 ...v....kktest
^C
Message was send to default destination with router's destination MAC address.
>How-To-Repeat:
Always.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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