4 #include <sys/socket.h>
7 static int __netlink_enumerate(int fd, unsigned int seq, int type, int af,
8 int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx)
17 struct nlmsghdr reply;
21 memset(&u.req, 0, sizeof(u.req));
22 u.req.nlh.nlmsg_len = sizeof(u.req);
23 u.req.nlh.nlmsg_type = type;
24 u.req.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
25 u.req.nlh.nlmsg_seq = seq;
26 u.req.g.rtgen_family = af;
27 r = send(fd, &u.req, sizeof(u.req), 0);
31 r = recv(fd, u.buf, sizeof(u.buf), MSG_DONTWAIT);
32 if (r <= 0) return -1;
33 for (h = &u.reply; NLMSG_OK(h, (void*)&u.buf[r]); h = NLMSG_NEXT(h)) {
34 if (h->nlmsg_type == NLMSG_DONE) return 0;
35 if (h->nlmsg_type == NLMSG_ERROR) return -1;
42 int __rtnetlink_enumerate(int link_af, int addr_af, int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx)
46 fd = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE);
47 if (fd < 0) return -1;
48 r = __netlink_enumerate(fd, 1, RTM_GETLINK, link_af, cb, ctx);
49 if (!r) r = __netlink_enumerate(fd, 2, RTM_GETADDR, addr_af, cb, ctx);
50 __syscall(SYS_close,fd);