To be more precise the sendmsg() in the following fails on
certian platforms.
Mark
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/uio.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
int
main(int argc, char **argv) {
struct sockaddr_in6 sa;
int fd;
int res;
int on = 1;
fd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (fd == -1) {
perror("socket");
exit(1);
}
fprintf(stderr, "socket options");
#ifdef SO_BSDCOMPAT
fprintf(stderr, " SO_BSDCOMPAT");
res = setsockopt(fd, SOL_SOCKET, SO_BSDCOMPAT, (void *)&on, sizeof(on));
if (res == -1)
perror("setsockopt(SO_BSDCOMPAT)");
#endif
#ifdef SO_TIMESTAMP
fprintf(stderr, " SO_TIMESTAMP");
res = setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, (void *)&on, sizeof(on));
if (res == -1)
perror("setsockopt(SO_TIMESTAMP)");
#endif
#ifdef IPV6_RECVPKTINFO
fprintf(stderr, " IPV6_RECVPKTINFO");
res = setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
(void *)&on, sizeof(on));
if (res == -1)
perror("setsockopt(IPV6_RECVPKTINFO)");
#else
fprintf(stderr, " IPV6_PKTINFO");
res = setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO,
(void *)&on, sizeof(on));
if (res == -1)
perror("setsockopt(IPV6_PKTINFO)");
#endif
fprintf(stderr, "\n");
memset(&sa, 0, sizeof(sa));
sa.sin6_addr = in6addr_any;
sa.sin6_family = PF_INET6;
sa.sin6_port = htons(0);
#ifdef SIN6_LEN
sa.sin6_len = sizeof(sa);
#endif
res = bind(fd, (struct sockaddr *)&sa, sizeof(sa));
if (res == -1) {
perror("bind");
exit(1);
}
while (*++argv != NULL) {
struct msghdr msg;
struct iovec io;
memset(&sa, 0, sizeof(sa));
if (inet_pton(PF_INET6, *argv, &sa.sin6_addr) != 1)
continue;
sa.sin6_family = PF_INET6;
sa.sin6_port = htons(9); /* discard */
#ifdef SIN6_LEN
sa.sin6_len = sizeof(sa);
#endif
/* some data */
io.iov_base = "1234";
io.iov_len = 4;
msg.msg_name = &sa;
msg.msg_namelen = sizeof(sa);
msg.msg_iov = &io;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
fprintf(stderr, "trying %s#9 ... ", *argv);
errno = 0;
res = sendmsg(fd, &msg, 0);
if (res != 4)
perror("sendto");
else
fprintf(stderr, "success\n");
}
close(fd);
return (0);
}
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: [EMAIL PROTECTED]
