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/* COVERAGE: sendmmsg */
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <signal.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/syscall.h>
#include <linux/net.h>
/* glibc sometimes gets too smart and substitutes sendmsg for
* sendmmsg. So, we'll have to define our own sendmmsg(). */
#if defined(SYS_sendmmsg)
static inline int
sys_sendmmsg(int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
{
return syscall(SYS_sendmmsg, fd, vmessages, vlen, flags);
}
#endif
static int sfd; /* shared between start_server and do_child */
void do_child()
{
struct sockaddr_in fsin;
fd_set afds, rfds;
int nfds, cc, fd;
char buf[1024];
FD_ZERO(&afds);
FD_SET(sfd, &afds);
nfds = FD_SETSIZE;
/* accept connections until killed */
while (1) {
socklen_t fromlen;
memcpy(&rfds, &afds, sizeof(rfds));
if (select(nfds, &rfds, (fd_set *) 0, (fd_set *) 0,
(struct timeval *)0) < 0) {
if (errno != EINTR)
exit(1);
}
if (FD_ISSET(sfd, &rfds)) {
int newfd;
fromlen = sizeof(fsin);
newfd = accept(sfd, (struct sockaddr *)&fsin, &fromlen);
if (newfd >= 0)
FD_SET(newfd, &afds);
}
for (fd = 0; fd < nfds; ++fd) {
if (fd != sfd && FD_ISSET(fd, &rfds)) {
cc = read(fd, buf, sizeof(buf));
if (cc == 0 || (cc < 0 && errno != EINTR)) {
(void)close(fd);
FD_CLR(fd, &afds);
}
}
}
}
}
pid_t
start_server(struct sockaddr_in *sin0)
{
struct sockaddr_in sin1 = *sin0;
pid_t pid;
sfd = socket(PF_INET, SOCK_STREAM, 0);
if (sfd < 0)
return -1;
if (bind(sfd, (struct sockaddr *)&sin1, sizeof(sin1)) < 0)
return -1;
if (listen(sfd, 10) < 0)
return -1;
switch (pid = fork()) {
case 0: /* child */
alarm(30);
do_child();
break;
case -1: /* fall through */
default: /* parent */
(void)close(sfd);
return pid;
}
return -1;
}
int main()
{
#if defined(SYS_sendmmsg)
int s, fd_null;
struct sockaddr_in sin1, from;
pid_t pid = 0;
char buf[2][1024];
fd_set rdfds;
struct mmsghdr msgs[2];
struct iovec iov[2];
socklen_t fromlen;
/* initialize sockaddr's */
sin1.sin_family = AF_INET;
sin1.sin_port = htons((getpid() % 32768) + 11000);
sin1.sin_addr.s_addr = INADDR_ANY;
pid = start_server(&sin1);
fromlen = sizeof(from);
memset(msgs, 0, sizeof(msgs));
iov[0].iov_base = buf[0];
iov[0].iov_len = sizeof(buf[0]);
msgs[0].msg_hdr.msg_iov = &iov[0];
msgs[0].msg_hdr.msg_iovlen = 1;
iov[1].iov_base = buf[1];
iov[1].iov_len = sizeof(buf[1]);
msgs[1].msg_hdr.msg_iov = &iov[1];
msgs[1].msg_hdr.msg_iovlen = 1;
fd_null = open("/dev/null", O_WRONLY);
sys_sendmmsg(-1, msgs, 2, 0);
//staptest// sendmmsg (-1, XXXX, 2, 0x0) = -NNNN (EBADF)
sys_sendmmsg(fd_null, msgs, 2, MSG_DONTWAIT);
//staptest// sendmmsg (NNNN, XXXX, 2, MSG_DONTWAIT) = -NNNN (ENOTSOCK)
s = socket(PF_INET, SOCK_DGRAM, 0);
//staptest// socket (PF_INET, SOCK_DGRAM, IPPROTO_IP) = NNNN
sys_sendmmsg(s, msgs, 2, 0);
//staptest// sendmmsg (NNNN, XXXX, 2, 0x0) = -NNNN (EDESTADDRREQ)
sys_sendmmsg(s, (struct mmsghdr *)-1, 2, 0);
//staptest// sendmmsg (NNNN, 0x[f]+, 2, 0x0) = -NNNN (EFAULT)
close(s);
//staptest// close (NNNN) = 0
s = socket(PF_INET, SOCK_STREAM, 0);
//staptest// socket (PF_INET, SOCK_STREAM, IPPROTO_IP) = NNNN
connect(s, (struct sockaddr *)&sin1, sizeof(sin1));
//staptest// connect (NNNN, {AF_INET, 0.0.0.0, NNNN}, 16) = 0
// Note that the exact failure return value can differ here, so
// we'll just ignore it. Also note that on a 32-bit kernel (i686
// for instance), MAXSTRINGLEN is only 256. Passing a -1 as the
// flags value can produce a string that will cause argstr to get
// too big. So, we'll make the end of the argument optional.
sys_sendmmsg(s, msgs, 2, -1);
//staptest// sendmmsg (NNNN, XXXX, 2, MSG_[^ ]+[[[[|XXXX]]]]?) = NNNN
close(s);
//staptest// close (NNNN) = 0
s = socket(PF_INET, SOCK_STREAM, 0);
//staptest// socket (PF_INET, SOCK_STREAM, IPPROTO_IP) = NNNN
connect(s, (struct sockaddr *)&sin1, sizeof(sin1));
//staptest// connect (NNNN, {AF_INET, 0.0.0.0, NNNN}, 16) = 0
// We don't want to wait for -1 vectors, since we'd be waiting for
// a long time...
sys_sendmmsg(s, msgs, -1, MSG_DONTWAIT);
//staptest// sendmmsg (NNNN, XXXX, 4294967295, MSG_DONTWAIT)
close(s);
//staptest// close (NNNN) = 0
s = socket(PF_INET, SOCK_STREAM, 0);
//staptest// socket (PF_INET, SOCK_STREAM, IPPROTO_IP) = NNNN
connect(s, (struct sockaddr *)&sin1, sizeof(sin1));
//staptest// connect (NNNN, {AF_INET, 0.0.0.0, NNNN}, 16) = 0
sys_sendmmsg(s, msgs, 2, MSG_DONTWAIT);
//staptest// sendmmsg (NNNN, XXXX, 2, MSG_DONTWAIT) = NNNN
close(s);
//staptest// close (NNNN) = 0
close(fd_null);
//staptest// close (NNNN) = 0
if (pid > 0)
(void)kill(pid, SIGKILL); /* kill server */
//staptest// kill (NNNN, SIGKILL) = 0
#endif
return 0;
}
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