示例#1
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;

        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)
                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;
        }

        return lldp_handle_datagram(lldp, n);
}
示例#2
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);
}