6 #include <sys/socket.h>
8 #include <linux/netlink.h>
9 #include <linux/sock_diag.h>
10 #include <linux/unix_diag.h>
12 #if !defined NETLINK_SOCK_DIAG && defined NETLINK_INET_DIAG
13 # define NETLINK_SOCK_DIAG NETLINK_INET_DIAG
17 send_query(const int fd, const int family, const int proto)
19 struct sockaddr_nl nladdr = {
20 .nl_family = AF_NETLINK
24 struct unix_diag_req udr;
27 .nlmsg_len = sizeof(req),
28 .nlmsg_type = SOCK_DIAG_BY_FAMILY,
29 .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
32 .sdiag_family = family,
33 .sdiag_protocol = proto,
35 .udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER
40 .iov_len = sizeof(req)
43 .msg_name = (void*)&nladdr,
44 .msg_namelen = sizeof(nladdr),
49 return sendmsg(fd, &msg, 0) > 0;
53 check_responses(const int fd)
55 static char buf[8192];
56 struct sockaddr_nl nladdr = {
57 .nl_family = AF_NETLINK
61 .iov_len = sizeof(buf)
64 .msg_name = (void*)&nladdr,
65 .msg_namelen = sizeof(nladdr),
70 ssize_t ret = recvmsg(fd, &msg, 0);
74 struct nlmsghdr *h = (struct nlmsghdr*)buf;
75 return (NLMSG_OK(h, ret) &&
76 h->nlmsg_type != NLMSG_ERROR &&
77 h->nlmsg_type != NLMSG_DONE) ? 1 : 0;
80 #define SUN_PATH "netlink_unix_diag_socket"
83 struct sockaddr_un addr = {
84 .sun_family = AF_UNIX,
87 socklen_t len = offsetof(struct sockaddr_un, sun_path) + sizeof(SUN_PATH);
92 (void) unlink(SUN_PATH);
93 if (socket(PF_LOCAL, SOCK_STREAM, 0) ||
94 bind(0, (struct sockaddr *) &addr, len) ||
98 assert(unlink(SUN_PATH) == 0);
100 if (socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG) != 1)
103 return (send_query(1, AF_UNIX, 0) &&
104 check_responses(1)) ? 0 : 77;