int icmp6_receive(int fd, void *iov_base, size_t iov_len, struct in6_addr *dst, triple_timestamp *timestamp) { assert_se(read (fd, iov_base, iov_len) == (ssize_t)iov_len); if (timestamp) triple_timestamp_get(timestamp); return 0; }
static int lldp_receive_datagram(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL; ssize_t space, length; sd_lldp *lldp = userdata; struct timespec ts; assert(fd >= 0); assert(lldp); space = next_datagram_size_fd(fd); if (space < 0) return log_lldp_errno(space, "Failed to determine datagram size to read: %m"); n = lldp_neighbor_new(space); if (!n) return -ENOMEM; length = recv(fd, LLDP_NEIGHBOR_RAW(n), n->raw_size, MSG_DONTWAIT); if (length < 0) { if (errno == EAGAIN || errno == EINTR) return 0; return log_lldp_errno(errno, "Failed to read LLDP datagram: %m"); } if ((size_t) length != n->raw_size) { log_lldp("Packet size mismatch."); return -EINVAL; } /* Try to get the timestamp of this packet if it is known */ if (ioctl(fd, SIOCGSTAMPNS, &ts) >= 0) triple_timestamp_from_realtime(&n->timestamp, timespec_load(&ts)); else triple_timestamp_get(&n->timestamp); return lldp_handle_datagram(lldp, n); }