Function sctp_inpcb_bind

freebsd/netinet/sctp_pcb.c:2805–3222

sctp_ifap is used to bypass normal local address validation checks */

/* sctp_ifap is used to bypass normal local address validation checks */
int
sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
    struct sctp_ifa *sctp_ifap, struct thread *p)
{
	/* bind a ep to a socket address */
	struct sctppcbhead *head;
	struct sctp_inpcb *inp, *inp_tmp;
	struct inpcb *ip_inp;
	int port_reuse_active = 0;
	int bindall;
	uint16_t lport;
	int error;
	uint32_t vrf_id;

	lport = 0;
	bindall = 1;
	inp = (struct sctp_inpcb *)so->so_pcb;
	ip_inp = (struct inpcb *)so->so_pcb;
#ifdef SCTP_DEBUG
	if (addr) {
		SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
		    ntohs(((struct sockaddr_in *)addr)->sin_port));
		SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
	}
#endif
	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
		/* already did a bind, subsequent binds NOT allowed ! */
		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
		return (EINVAL);
	}
#ifdef INVARIANTS
	if (p == NULL)
		panic("null proc/thread");
#endif
	if (addr != NULL) {
		switch (addr->sa_family) {
#ifdef INET
		case AF_INET:
			{
				struct sockaddr_in *sin;

				/* IPV6_V6ONLY socket? */
				if (SCTP_IPV6_V6ONLY(inp)) {
					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
					return (EINVAL);
				}
				if (addr->sa_len != sizeof(*sin)) {
					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
					return (EINVAL);
				}

				sin = (struct sockaddr_in *)addr;
				lport = sin->sin_port;
				/*
				 * For LOOPBACK the prison_local_ip4() call
				 * will transmute the ip address to the
				 * proper value.