Dmitry V. Levin
6add1b09d6
* tests/netlink_inet_diag.c (main): Return 77 if socket, bind, or listen syscall fail. * tests/netlink_unix_diag.c (main): Likewise.
93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <linux/netlink.h>
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#include <linux/sock_diag.h>
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#include <linux/inet_diag.h>
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static int
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send_query(const int fd, const int family, const int proto)
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{
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struct sockaddr_nl nladdr = {
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.nl_family = AF_NETLINK
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};
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struct {
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struct nlmsghdr nlh;
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struct inet_diag_req_v2 idr;
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} req = {
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.nlh = {
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.nlmsg_len = sizeof(req),
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.nlmsg_type = SOCK_DIAG_BY_FAMILY,
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.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
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},
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.idr = {
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.sdiag_family = family,
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.sdiag_protocol = proto,
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.idiag_states = -1
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}
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};
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struct iovec iov = {
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.iov_base = &req,
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.iov_len = sizeof(req)
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};
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struct msghdr msg = {
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.msg_name = (void*)&nladdr,
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.msg_namelen = sizeof(nladdr),
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.msg_iov = &iov,
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.msg_iovlen = 1
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};
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return sendmsg(fd, &msg, 0) > 0;
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}
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static int
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check_responses(const int fd)
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{
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static char buf[8192];
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struct sockaddr_nl nladdr = {
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.nl_family = AF_NETLINK
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};
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struct iovec iov = {
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.iov_base = buf,
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.iov_len = sizeof(buf)
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};
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struct msghdr msg = {
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.msg_name = (void*)&nladdr,
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.msg_namelen = sizeof(nladdr),
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.msg_iov = &iov,
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.msg_iovlen = 1
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};
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ssize_t ret = recvmsg(fd, &msg, 0);
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if (ret <= 0)
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return 0;
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struct nlmsghdr *h = (struct nlmsghdr*)buf;
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return (NLMSG_OK(h, ret) &&
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h->nlmsg_type != NLMSG_ERROR &&
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h->nlmsg_type != NLMSG_DONE) ? 1 : 0;
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}
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int main(void)
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{
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struct sockaddr_in addr;
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socklen_t len = sizeof(addr);
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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close(0);
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close(1);
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if (socket(PF_INET, SOCK_STREAM, 0) ||
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bind(0, (struct sockaddr *) &addr, len) ||
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listen(0, 5) ||
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socket(AF_NETLINK, SOCK_RAW, NETLINK_INET_DIAG) != 1)
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return 77;
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return (send_query(1, AF_INET, IPPROTO_TCP) &&
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check_responses(1)) ? 0 : 77;
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}
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