#include <linux/rtnetlink.h>
#include <linux/filter.h>
+#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
do {
ssize_t read = recv(rtnl, buf, sizeof(buf), 0);
nhm = (struct nlmsghdr*)buf;
- if (read < 0 || !NLMSG_OK(nhm, (size_t)read))
+ if ((read < 0 && errno == EINTR) || !NLMSG_OK(nhm, (size_t)read))
continue;
+ else if (read < 0)
+ break;
for (; read > 0 && NLMSG_OK(nhm, (size_t)read); nhm = NLMSG_NEXT(nhm, read)) {
ssize_t attrlen = NLMSG_PAYLOAD(nhm, sizeof(struct ndmsg));
ping.ip6.ip6_src = cpd->target;
ping.ip6.ip6_dst = cpd->target;
-/*
- uint16_t sum = cksum(&ping.ip6.ip6_src, sizeof(ping.ip6.ip6_src), 0);
- sum = cksum(&ping.ip6.ip6_dst, sizeof(ping.ip6.ip6_dst), ~sum);
- sum = cksum(&ping.ip6.ip6_plen, sizeof(ping.ip6.ip6_plen), ~sum);
-
- uint8_t next[4] = {0, 0, 0, ping.ip6.ip6_nxt};
- sum = cksum(next, sizeof(next), ~sum);
-
- ping.icmp6.icmp6_cksum = cksum(&ping.icmp6, sizeof(ping.icmp6), ~sum);
-*/
-
struct sock_filter bpf[] = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS, offsetof(struct ip6_hdr, ip6_plen)),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8 << 16 | IPPROTO_ICMPV6 << 8 | 254, 0, 13),
sock = -1;
rtnl = -1;
}
-
-/*
-
-uint16_t cksum(const uint16_t *addr, size_t count, uint16_t start)
-{
- uint32_t sum = start;
-
- while (count > 1) {
- sum += *addr++;
- count -= 2;
- }
-
- while (sum >> 16)
- sum = (sum & 0xffff) + (sum >> 16);
-
- return ~sum;
-}
-
-*/