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Fix forcing multicast msgs to loopback on OpenBSD. 

Fix forcing multicast msgs to loopback on OpenBSD.
e.g.
$ sudo qemu -m 128 -no-fd-bootchk \
        -hda virtual.img -boot n -nographic \
        -net nic,vlan=0,model=rtl8139,macaddr=52:54:00:12:34:03 \
        -net user -tftp /usr/src/sys/arch/i386/compile/TEST -bootp pxeboot \
        -net nic,vlan=1,model=rtl8139,macaddr=52:54:00:23:03:01 \
        -net tap,vlan=1,script=no \
        -net nic,vlan=3,model=rtl8139,macaddr=52:54:00:23:03:03 \
        -net socket,vlan=3,mcast=230.0.0.1:10003
setsockopt(SOL_IP, IP_MULTICAST_LOOP): Invalid argument
qemu: -net socket,vlan=3,mcast=230.0.0.1:10003: Device 'socket' could not be initialized

Signed-off-by: Brad Smith <brad@comstyle.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Brad 2011-08-07 11:06:43 +00:00 committed by Blue Swirl
parent 9f4b09a4cd
commit 23ddf2bb1e
1 changed files with 8 additions and 2 deletions
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10
net/socket.c
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@ -154,6 +154,12 @@ static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr
struct ip_mreq imr;
int fd;
int val, ret;
#ifdef __OpenBSD__
unsigned char loop;
#else
int loop;
#endif
if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
inet_ntoa(mcastaddr->sin_addr),
@ -197,9 +203,9 @@ static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr
}
/* Force mcast msgs to loopback (eg. several QEMUs in same host */
val = 1;
loop = 1;
ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
(const char *)&val, sizeof(val));
(const char *)&loop, sizeof(loop));
if (ret < 0) {
perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
goto fail;