Function nd6_output_ifp

freebsd/netinet6/nd6.c:2155–2198

}

int
nd6_output_ifp(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m,
    struct sockaddr_in6 *dst, struct route *ro)
{
	int error;
	int ip6len;
	struct ip6_hdr *ip6;
	struct m_tag *mtag;

#ifdef MAC
	mac_netinet6_nd6_send(ifp, m);
#endif

	/*
	 * If called from nd6_ns_output() (NS), nd6_na_output() (NA),
	 * icmp6_redirect_output() (REDIRECT) or from rip6_output() (RS, RA
	 * as handled by rtsol and rtadvd), mbufs will be tagged for SeND
	 * to be diverted to user space.  When re-injected into the kernel,
	 * send_output() will directly dispatch them to the outgoing interface.
	 */
	if (send_sendso_input_hook != NULL) {
		mtag = m_tag_find(m, PACKET_TAG_ND_OUTGOING, NULL);
		if (mtag != NULL) {
			ip6 = mtod(m, struct ip6_hdr *);
			ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen);
			/* Use the SEND socket */
			error = send_sendso_input_hook(m, ifp, SND_OUT,
			    ip6len);
			/* -1 == no app on SEND socket */
			if (error == 0 || error != -1)
			    return (error);
		}
	}

	m_clrprotoflags(m);	/* Avoid confusing lower layers. */
	IP_PROBE(send, NULL, NULL, mtod(m, struct ip6_hdr *), ifp, NULL,
	    mtod(m, struct ip6_hdr *));

	if ((ifp->if_flags & IFF_LOOPBACK) == 0)
		origifp = ifp;

	error = (*ifp->if_output)(origifp, m, (struct sockaddr *)dst, ro);
	return (error);
}

/*
 * Lookup link headerfor @sa_dst address. Stores found