usr/src/sys/net/raw_cb.c

/*
 * Copyright (c) 1980, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)raw_cb.c	7.3 (Berkeley) %G%
 */

#include "param.h"
#include "systm.h"
#include "mbuf.h"
#include "socket.h"
#include "socketvar.h"
#include "domain.h"
#include "protosw.h"
#include "errno.h"

#include "if.h"
#include "route.h"
#include "raw_cb.h"
#include "../netinet/in.h"

#include "../machine/mtpr.h"

/*
 * Routines to manage the raw protocol control blocks.
 *
 * TODO:
 *	hash lookups by protocol family/protocol + address family
 *	take care of unique address problems per AF?
 *	redo address binding to allow wildcards
 */

/*
 * Allocate a control block and a nominal amount
 * of buffer space for the socket.
 */
raw_attach(so, proto)
	register struct socket *so;
	int proto;
{
	struct mbuf *m;
	register struct rawcb *rp;

	m = m_getclr(M_DONTWAIT, MT_PCB);
	if (m == 0)
		return (ENOBUFS);
	if (sbreserve(&so->so_snd, RAWSNDQ) == 0)
		goto bad;
	if (sbreserve(&so->so_rcv, RAWRCVQ) == 0)
		goto bad2;
	rp = mtod(m, struct rawcb *);
	rp->rcb_socket = so;
	so->so_pcb = (caddr_t)rp;
	rp->rcb_pcb = 0;
	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
	rp->rcb_proto.sp_protocol = proto;
	insque(rp, &rawcb);
	return (0);
bad2:
	sbrelease(&so->so_snd);
bad:
	(void) m_free(m);
	return (ENOBUFS);
}

/*
 * Detach the raw connection block and discard
 * socket resources.
 */
raw_detach(rp)
	register struct rawcb *rp;
{
	struct socket *so = rp->rcb_socket;

	if (rp->rcb_route.ro_rt)
		rtfree(rp->rcb_route.ro_rt);
	so->so_pcb = 0;
	sofree(so);
	remque(rp);
	if (rp->rcb_options)
		m_freem(rp->rcb_options);
	m_freem(dtom(rp));
}

/*
 * Disconnect and possibly release resources.
 */
raw_disconnect(rp)
	struct rawcb *rp;
{

	rp->rcb_flags &= ~RAW_FADDR;
	if (rp->rcb_socket->so_state & SS_NOFDREF)
		raw_detach(rp);
}

raw_bind(so, nam)
	register struct socket *so;
	struct mbuf *nam;
{
	struct sockaddr *addr = mtod(nam, struct sockaddr *);
	register struct rawcb *rp;

	if (ifnet == 0)
		return (EADDRNOTAVAIL);
/* BEGIN DUBIOUS */
	/*
	 * Should we verify address not already in use?
	 * Some say yes, others no.
	 */
	switch (addr->sa_family) {

#ifdef INET
	case AF_IMPLINK:
	case AF_INET: {
		if (((struct sockaddr_in *)addr)->sin_addr.s_addr &&
		    ifa_ifwithaddr(addr) == 0)
			return (EADDRNOTAVAIL);
		break;
	}
#endif

	default:
		return (EAFNOSUPPORT);
	}
/* END DUBIOUS */
	rp = sotorawcb(so);
	bcopy((caddr_t)addr, (caddr_t)&rp->rcb_laddr, sizeof (*addr));
	rp->rcb_flags |= RAW_LADDR;
	return (0);
}

/*
 * Associate a peer's address with a
 * raw connection block.
 */
raw_connaddr(rp, nam)
	struct rawcb *rp;
	struct mbuf *nam;
{
	struct sockaddr *addr = mtod(nam, struct sockaddr *);

	bcopy((caddr_t)addr, (caddr_t)&rp->rcb_faddr, sizeof(*addr));
	rp->rcb_flags |= RAW_FADDR;
}
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1980, 1986 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
	6	* @(#)raw_cb.c 7.3 (Berkeley) %G%
	7	*/
	8
	9	#include "param.h"
	10	#include "systm.h"
	11	#include "mbuf.h"
	12	#include "socket.h"
	13	#include "socketvar.h"
	14	#include "domain.h"
	15	#include "protosw.h"
	16	#include "errno.h"
	17
	18	#include "if.h"
	19	#include "route.h"
	20	#include "raw_cb.h"
	21	#include "../netinet/in.h"
	22
	23	#include "../machine/mtpr.h"
	24
	25	/*
	26	* Routines to manage the raw protocol control blocks.
	27	*
	28	* TODO:
	29	* hash lookups by protocol family/protocol + address family
	30	* take care of unique address problems per AF?
	31	* redo address binding to allow wildcards
	32	*/
	33
	34	/*
	35	* Allocate a control block and a nominal amount
	36	* of buffer space for the socket.
	37	*/
	38	raw_attach(so, proto)
	39	register struct socket *so;
	40	int proto;
	41	{
	42	struct mbuf *m;
	43	register struct rawcb *rp;
	44
	45	m = m_getclr(M_DONTWAIT, MT_PCB);
	46	if (m == 0)
	47	return (ENOBUFS);
	48	if (sbreserve(&so->so_snd, RAWSNDQ) == 0)
	49	goto bad;
	50	if (sbreserve(&so->so_rcv, RAWRCVQ) == 0)
	51	goto bad2;
	52	rp = mtod(m, struct rawcb *);
	53	rp->rcb_socket = so;
	54	so->so_pcb = (caddr_t)rp;
	55	rp->rcb_pcb = 0;
	56	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
	57	rp->rcb_proto.sp_protocol = proto;
	58	insque(rp, &rawcb);
	59	return (0);
	60	bad2:
	61	sbrelease(&so->so_snd);
	62	bad:
	63	(void) m_free(m);
	64	return (ENOBUFS);
	65	}
	66
	67	/*
	68	* Detach the raw connection block and discard
	69	* socket resources.
	70	*/
	71	raw_detach(rp)
	72	register struct rawcb *rp;
	73	{
	74	struct socket *so = rp->rcb_socket;
	75
	76	if (rp->rcb_route.ro_rt)
	77	rtfree(rp->rcb_route.ro_rt);
	78	so->so_pcb = 0;
	79	sofree(so);
	80	remque(rp);
	81	if (rp->rcb_options)
	82	m_freem(rp->rcb_options);
	83	m_freem(dtom(rp));
	84	}
	85
	86	/*
	87	* Disconnect and possibly release resources.
	88	*/
	89	raw_disconnect(rp)
	90	struct rawcb *rp;
	91	{
	92
	93	rp->rcb_flags &= ~RAW_FADDR;
	94	if (rp->rcb_socket->so_state & SS_NOFDREF)
	95	raw_detach(rp);
	96	}
	97
	98	raw_bind(so, nam)
	99	register struct socket *so;
	100	struct mbuf *nam;
	101	{
	102	struct sockaddr addr = mtod(nam, struct sockaddr );
	103	register struct rawcb *rp;
	104
	105	if (ifnet == 0)
	106	return (EADDRNOTAVAIL);
	107	/* BEGIN DUBIOUS */
	108	/*
	109	* Should we verify address not already in use?
	110	* Some say yes, others no.
	111	*/
	112	switch (addr->sa_family) {
	113
	114	#ifdef INET
	115	case AF_IMPLINK:
	116	case AF_INET: {
	117	if (((struct sockaddr_in *)addr)->sin_addr.s_addr &&
	118	ifa_ifwithaddr(addr) == 0)
	119	return (EADDRNOTAVAIL);
	120	break;
	121	}
	122	#endif
	123
	124	default:
	125	return (EAFNOSUPPORT);
	126	}
	127	/* END DUBIOUS */
	128	rp = sotorawcb(so);
	129	bcopy((caddr_t)addr, (caddr_t)&rp->rcb_laddr, sizeof (*addr));
	130	rp->rcb_flags \|= RAW_LADDR;
	131	return (0);
	132	}
	133
	134	/*
	135	* Associate a peer's address with a
	136	* raw connection block.
	137	*/
	138	raw_connaddr(rp, nam)
	139	struct rawcb *rp;
	140	struct mbuf *nam;
	141	{
	142	struct sockaddr addr = mtod(nam, struct sockaddr );
	143
	144	bcopy((caddr_t)addr, (caddr_t)&rp->rcb_faddr, sizeof(*addr));
	145	rp->rcb_flags \|= RAW_FADDR;
	146	}