[unix-history] / usr / src / sys / netinet / in_pcb.c

/*	in_pcb.c	4.41	83/07/25	*/

#include "../h/param.h"
#include "../h/systm.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/mbuf.h"
#include "../h/socket.h"
#include "../h/socketvar.h"
#include "../netinet/in.h"
#include "../netinet/in_systm.h"
#include "../net/if.h"
#include "../net/route.h"
#include "../netinet/in_pcb.h"
#include "../h/protosw.h"

struct	in_addr zeroin_addr;

in_pcballoc(so, head)
	struct socket *so;
	struct inpcb *head;
{
	struct mbuf *m;
	register struct inpcb *inp;

	m = m_getclr(M_DONTWAIT, MT_PCB);
	if (m == NULL)
		return (ENOBUFS);
	inp = mtod(m, struct inpcb *);
	inp->inp_head = head;
	inp->inp_socket = so;
	insque(inp, head);
	so->so_pcb = (caddr_t)inp;
	return (0);
}
	
in_pcbbind(inp, nam)
	register struct inpcb *inp;
	struct mbuf *nam;
{
	register struct socket *so = inp->inp_socket;
	register struct inpcb *head = inp->inp_head;
	register struct sockaddr_in *sin;
	u_short lport = 0;

	if (ifnet == 0)
		return (EADDRNOTAVAIL);
	if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
		return (EINVAL);
	if (nam == 0)
		goto noname;
	sin = mtod(nam, struct sockaddr_in *);
	if (nam->m_len != sizeof (*sin))
		return (EINVAL);
	if (sin->sin_addr.s_addr != INADDR_ANY) {
		int tport = sin->sin_port;

		sin->sin_port = 0;		/* yech... */
		if (if_ifwithaddr((struct sockaddr *)sin) == 0)
			return (EADDRNOTAVAIL);
		sin->sin_port = tport;
	}
	lport = sin->sin_port;
	if (lport) {
		u_short aport = htons(lport);
		int wild = 0;

		/* GROSS */
		if (aport < IPPORT_RESERVED && u.u_uid != 0)
			return (EACCES);
		/* even GROSSER, but this is the Internet */
		if ((so->so_options & SO_REUSEADDR) == 0 &&
		    ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
		     (so->so_options & SO_ACCEPTCONN) == 0))
			wild = INPLOOKUP_WILDCARD;
		if (in_pcblookup(head,
		    zeroin_addr, 0, sin->sin_addr, lport, wild))
			return (EADDRINUSE);
	}
	inp->inp_laddr = sin->sin_addr;
noname:
	if (lport == 0)
		do {
			if (head->inp_lport++ < IPPORT_RESERVED)
				head->inp_lport = IPPORT_RESERVED;
			lport = htons(head->inp_lport);
		} while (in_pcblookup(head,
			    zeroin_addr, 0, inp->inp_laddr, lport, 0));
	inp->inp_lport = lport;
	return (0);
}

/*
 * Connect from a socket to a specified address.
 * Both address and port must be specified in argument sin.
 * If don't have a local address for this socket yet,
 * then pick one.
 */
in_pcbconnect(inp, nam)
	struct inpcb *inp;
	struct mbuf *nam;
{
	struct ifnet *ifp;
	struct sockaddr_in *ifaddr;
	register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);

	if (nam->m_len != sizeof (*sin))
		return (EINVAL);
	if (sin->sin_family != AF_INET)
		return (EAFNOSUPPORT);
	if (sin->sin_addr.s_addr == INADDR_ANY || sin->sin_port == 0)
		return (EADDRNOTAVAIL);
	if (inp->inp_laddr.s_addr == INADDR_ANY) {
		ifp = if_ifonnetof(in_netof(sin->sin_addr));
		if (ifp == 0) {
			/*
			 * We should select the interface based on
			 * the route to be used, but for udp this would
			 * result in two calls to rtalloc for each packet
			 * sent; hardly worthwhile...
			 */
			ifp = if_ifwithaf(AF_INET);
			if (ifp == 0)
				return (EADDRNOTAVAIL);
		}
		ifaddr = (struct sockaddr_in *)&ifp->if_addr;
	}
	if (in_pcblookup(inp->inp_head,
	    sin->sin_addr,
	    sin->sin_port,
	    inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
	    inp->inp_lport,
	    0))
		return (EADDRINUSE);
	if (inp->inp_laddr.s_addr == INADDR_ANY)
		inp->inp_laddr = ifaddr->sin_addr;
	inp->inp_faddr = sin->sin_addr;
	inp->inp_fport = sin->sin_port;
	return (0);
}

in_pcbdisconnect(inp)
	struct inpcb *inp;
{

	inp->inp_faddr.s_addr = INADDR_ANY;
	inp->inp_fport = 0;
	if (inp->inp_socket->so_state & SS_NOFDREF)
		in_pcbdetach(inp);
}

in_pcbdetach(inp)
	struct inpcb *inp;
{
	struct socket *so = inp->inp_socket;

	so->so_pcb = 0;
	sofree(so);
	if (inp->inp_route.ro_rt)
		rtfree(inp->inp_route.ro_rt);
	remque(inp);
	(void) m_free(dtom(inp));
}

in_setsockaddr(inp, nam)
	register struct inpcb *inp;
	struct mbuf *nam;
{
	register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
	
	nam->m_len = sizeof (*sin);
	sin = mtod(nam, struct sockaddr_in *);
	bzero((caddr_t)sin, sizeof (*sin));
	sin->sin_family = AF_INET;
	sin->sin_port = inp->inp_lport;
	sin->sin_addr = inp->inp_laddr;
}

in_setpeeraddr(inp, nam)
	register struct inpcb *inp;
	struct mbuf *nam;
{
	register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
	
	nam->m_len = sizeof (*sin);
	sin = mtod(nam, struct sockaddr_in *);
	bzero((caddr_t)sin, sizeof (*sin));
	sin->sin_family = AF_INET;
	sin->sin_port = inp->inp_fport;
	sin->sin_addr = inp->inp_faddr;
}

/*
 * Pass an error to all internet connections
 * associated with address sin.  Call the
 * protocol specific routine to clean up the
 * mess afterwards.
 */
in_pcbnotify(head, dst, errno, abort)
	struct inpcb *head;
	register struct in_addr *dst;
	int errno, (*abort)();
{
	register struct inpcb *inp, *oinp;
	int s = splimp();

	for (inp = head->inp_next; inp != head;) {
		if (inp->inp_faddr.s_addr != dst->s_addr) {
	next:
			inp = inp->inp_next;
			continue;
		}
		if (inp->inp_socket == 0)
			goto next;
		inp->inp_socket->so_error = errno;
		oinp = inp;
		inp = inp->inp_next;
		(*abort)(oinp);
	}
	splx(s);
}

struct inpcb *
in_pcblookup(head, faddr, fport, laddr, lport, flags)
	struct inpcb *head;
	struct in_addr faddr, laddr;
	u_short fport, lport;
	int flags;
{
	register struct inpcb *inp, *match = 0;
	int matchwild = 3, wildcard;

	for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
		if (inp->inp_lport != lport)
			continue;
		wildcard = 0;
		if (inp->inp_laddr.s_addr != INADDR_ANY) {
			if (laddr.s_addr == INADDR_ANY)
				wildcard++;
			else if (inp->inp_laddr.s_addr != laddr.s_addr)
				continue;
		} else {
			if (laddr.s_addr != INADDR_ANY)
				wildcard++;
		}
		if (inp->inp_faddr.s_addr != INADDR_ANY) {
			if (faddr.s_addr == INADDR_ANY)
				wildcard++;
			else if (inp->inp_faddr.s_addr != faddr.s_addr ||
			    inp->inp_fport != fport)
				continue;
		} else {
			if (faddr.s_addr != INADDR_ANY)
				wildcard++;
		}
		if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
			continue;
		if (wildcard < matchwild) {
			match = inp;
			matchwild = wildcard;
			if (matchwild == 0)
				break;
		}
	}
	return (match);
}
Commit	Line	Data
a7343092	1	/* in_pcb.c 4.41 83/07/25 */
af092e86 BJ	2
af092e86 BJ	3	#include "../h/param.h"
4ad99bae BJ	4	#include "../h/systm.h"
	5	#include "../h/dir.h"
	6	#include "../h/user.h"
af092e86 BJ	7	#include "../h/mbuf.h"
	8	#include "../h/socket.h"
	9	#include "../h/socketvar.h"
fcfe450e BJ	10	#include "../netinet/in.h"
fcfe450e BJ	11	#include "../netinet/in_systm.h"
4ad99bae	12	#include "../net/if.h"
c124e997	13	#include "../net/route.h"
fcfe450e	14	#include "../netinet/in_pcb.h"
1acff8ec	15	#include "../h/protosw.h"
af092e86	16
1a3dbf93	17	struct in_addr zeroin_addr;
405c9168	18
8f0d18de BJ	19	in_pcballoc(so, head)
	20	struct socket *so;
	21	struct inpcb *head;
	22	{
	23	struct mbuf *m;
	24	register struct inpcb *inp;
	25
cce93e4b	26	m = m_getclr(M_DONTWAIT, MT_PCB);
5cdc4d65	27	if (m == NULL)
8f0d18de BJ	28	return (ENOBUFS);
	29	inp = mtod(m, struct inpcb *);
	30	inp->inp_head = head;
	31	inp->inp_socket = so;
	32	insque(inp, head);
	33	so->so_pcb = (caddr_t)inp;
	34	return (0);
	35	}
	36
8075bb0e	37	in_pcbbind(inp, nam)
8f0d18de	38	register struct inpcb *inp;
8075bb0e	39	struct mbuf *nam;
8f0d18de BJ	40	{
	41	register struct socket *so = inp->inp_socket;
	42	register struct inpcb *head = inp->inp_head;
8075bb0e	43	register struct sockaddr_in *sin;
8f0d18de BJ	44	u_short lport = 0;
	45
	46	if (ifnet == 0)
	47	return (EADDRNOTAVAIL);
5cdc4d65	48	if (inp->inp_lport \|\| inp->inp_laddr.s_addr != INADDR_ANY)
8075bb0e BJ	49	return (EINVAL);
	50	if (nam == 0)
	51	goto noname;
	52	sin = mtod(nam, struct sockaddr_in *);
	53	if (nam->m_len != sizeof (*sin))
	54	return (EINVAL);
5cdc4d65	55	if (sin->sin_addr.s_addr != INADDR_ANY) {
8075bb0e	56	int tport = sin->sin_port;
8f0d18de	57
8075bb0e BJ	58	sin->sin_port = 0; /* yech... */
	59	if (if_ifwithaddr((struct sockaddr *)sin) == 0)
	60	return (EADDRNOTAVAIL);
	61	sin->sin_port = tport;
8f0d18de	62	}
8075bb0e BJ	63	lport = sin->sin_port;
8075bb0e BJ	64	if (lport) {
2c48b3f8	65	u_short aport = htons(lport);
8075bb0e	66	int wild = 0;
c124e997	67
8075bb0e BJ	68	/* GROSS */
	69	if (aport < IPPORT_RESERVED && u.u_uid != 0)
	70	return (EACCES);
b4a3d4a7 SL	71	/* even GROSSER, but this is the Internet */
	72	if ((so->so_options & SO_REUSEADDR) == 0 &&
	73	((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 \|\|
	74	(so->so_options & SO_ACCEPTCONN) == 0))
8075bb0e BJ	75	wild = INPLOOKUP_WILDCARD;
	76	if (in_pcblookup(head,
	77	zeroin_addr, 0, sin->sin_addr, lport, wild))
	78	return (EADDRINUSE);
4ad99bae	79	}
8075bb0e BJ	80	inp->inp_laddr = sin->sin_addr;
8075bb0e BJ	81	noname:
b454c3ea BJ	82	if (lport == 0)
b454c3ea BJ	83	do {
1aa87517 BJ	84	if (head->inp_lport++ < IPPORT_RESERVED)
1aa87517 BJ	85	head->inp_lport = IPPORT_RESERVED;
b454c3ea	86	lport = htons(head->inp_lport);
1aa87517 BJ	87	} while (in_pcblookup(head,
1aa87517 BJ	88	zeroin_addr, 0, inp->inp_laddr, lport, 0));
4ad99bae	89	inp->inp_lport = lport;
4ad99bae	90	return (0);
af092e86 BJ	91	}
af092e86 BJ	92
1acff8ec BJ	93	/*
	94	* Connect from a socket to a specified address.
	95	* Both address and port must be specified in argument sin.
	96	* If don't have a local address for this socket yet,
	97	* then pick one.
	98	*/
8075bb0e	99	in_pcbconnect(inp, nam)
4ad99bae	100	struct inpcb *inp;
8075bb0e	101	struct mbuf *nam;
2b4b57cd	102	{
1aa87517	103	struct ifnet *ifp;
ee787340	104	struct sockaddr_in *ifaddr;
8075bb0e	105	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
2b4b57cd	106
8075bb0e BJ	107	if (nam->m_len != sizeof (*sin))
8075bb0e BJ	108	return (EINVAL);
4ad99bae BJ	109	if (sin->sin_family != AF_INET)
4ad99bae BJ	110	return (EAFNOSUPPORT);
5cdc4d65	111	if (sin->sin_addr.s_addr == INADDR_ANY \|\| sin->sin_port == 0)
4ad99bae	112	return (EADDRNOTAVAIL);
5cdc4d65	113	if (inp->inp_laddr.s_addr == INADDR_ANY) {
6187f8f4	114	ifp = if_ifonnetof(in_netof(sin->sin_addr));
ee787340	115	if (ifp == 0) {
72e4f44e SL	116	/*
	117	* We should select the interface based on
	118	* the route to be used, but for udp this would
	119	* result in two calls to rtalloc for each packet
	120	* sent; hardly worthwhile...
	121	*/
ee787340 SL	122	ifp = if_ifwithaf(AF_INET);
ee787340 SL	123	if (ifp == 0)
72e4f44e	124	return (EADDRNOTAVAIL);
ee787340 SL	125	}
ee787340 SL	126	ifaddr = (struct sockaddr_in *)&ifp->if_addr;
1aa87517 BJ	127	}
1aa87517 BJ	128	if (in_pcblookup(inp->inp_head,
1acff8ec BJ	129	sin->sin_addr,
1acff8ec BJ	130	sin->sin_port,
ee787340	131	inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
1acff8ec BJ	132	inp->inp_lport,
1acff8ec BJ	133	0))
b454c3ea	134	return (EADDRINUSE);
5cdc4d65	135	if (inp->inp_laddr.s_addr == INADDR_ANY)
ee787340	136	inp->inp_laddr = ifaddr->sin_addr;
4ad99bae BJ	137	inp->inp_faddr = sin->sin_addr;
4ad99bae BJ	138	inp->inp_fport = sin->sin_port;
2b4b57cd BJ	139	return (0);
	140	}
	141
405c9168 BJ	142	in_pcbdisconnect(inp)
	143	struct inpcb *inp;
	144	{
	145
5cdc4d65	146	inp->inp_faddr.s_addr = INADDR_ANY;
ebcadd38	147	inp->inp_fport = 0;
8f0d18de	148	if (inp->inp_socket->so_state & SS_NOFDREF)
405c9168 BJ	149	in_pcbdetach(inp);
	150	}
	151
	152	in_pcbdetach(inp)
af092e86 BJ	153	struct inpcb *inp;
	154	{
	155	struct socket *so = inp->inp_socket;
	156
ba55c9af BJ	157	so->so_pcb = 0;
ba55c9af BJ	158	sofree(so);
c124e997	159	if (inp->inp_route.ro_rt)
f6311fb6	160	rtfree(inp->inp_route.ro_rt);
7545cf09	161	remque(inp);
cdad2eb1	162	(void) m_free(dtom(inp));
af092e86 BJ	163	}
af092e86 BJ	164
8075bb0e	165	in_setsockaddr(inp, nam)
126472ab	166	register struct inpcb *inp;
8075bb0e	167	struct mbuf *nam;
126472ab	168	{
8075bb0e BJ	169	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
	170
	171	nam->m_len = sizeof (*sin);
	172	sin = mtod(nam, struct sockaddr_in *);
126472ab SL	173	bzero((caddr_t)sin, sizeof (*sin));
	174	sin->sin_family = AF_INET;
	175	sin->sin_port = inp->inp_lport;
	176	sin->sin_addr = inp->inp_laddr;
	177	}
	178
a7343092 SL	179	in_setpeeraddr(inp, nam)
	180	register struct inpcb *inp;
	181	struct mbuf *nam;
	182	{
	183	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
	184
	185	nam->m_len = sizeof (*sin);
	186	sin = mtod(nam, struct sockaddr_in *);
	187	bzero((caddr_t)sin, sizeof (*sin));
	188	sin->sin_family = AF_INET;
	189	sin->sin_port = inp->inp_fport;
	190	sin->sin_addr = inp->inp_faddr;
	191	}
	192
72e4f44e SL	193	/*
	194	* Pass an error to all internet connections
	195	* associated with address sin. Call the
	196	* protocol specific routine to clean up the
	197	* mess afterwards.
	198	*/
	199	in_pcbnotify(head, dst, errno, abort)
	200	struct inpcb *head;
	201	register struct in_addr *dst;
	202	int errno, (*abort)();
	203	{
	204	register struct inpcb inp, oinp;
	205	int s = splimp();
	206
72e4f44e SL	207	for (inp = head->inp_next; inp != head;) {
	208	if (inp->inp_faddr.s_addr != dst->s_addr) {
	209	next:
	210	inp = inp->inp_next;
	211	continue;
	212	}
	213	if (inp->inp_socket == 0)
	214	goto next;
	215	inp->inp_socket->so_error = errno;
	216	oinp = inp;
	217	inp = inp->inp_next;
	218	(*abort)(oinp);
	219	}
	220	splx(s);
	221	}
	222
cdad2eb1	223	struct inpcb *
ebcadd38	224	in_pcblookup(head, faddr, fport, laddr, lport, flags)
af092e86	225	struct inpcb *head;
4ad99bae	226	struct in_addr faddr, laddr;
af092e86	227	u_short fport, lport;
ebcadd38	228	int flags;
af092e86	229	{
1aa87517 BJ	230	register struct inpcb inp, match = 0;
1aa87517 BJ	231	int matchwild = 3, wildcard;
af092e86	232
405c9168	233	for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
1aa87517	234	if (inp->inp_lport != lport)
405c9168	235	continue;
1aa87517	236	wildcard = 0;
5cdc4d65 SL	237	if (inp->inp_laddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	238	if (laddr.s_addr == INADDR_ANY)
1acff8ec BJ	239	wildcard++;
1acff8ec BJ	240	else if (inp->inp_laddr.s_addr != laddr.s_addr)
1aa87517 BJ	241	continue;
1aa87517 BJ	242	} else {
5cdc4d65	243	if (laddr.s_addr != INADDR_ANY)
1aa87517 BJ	244	wildcard++;
1aa87517 BJ	245	}
5cdc4d65 SL	246	if (inp->inp_faddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	247	if (faddr.s_addr == INADDR_ANY)
1acff8ec BJ	248	wildcard++;
1acff8ec BJ	249	else if (inp->inp_faddr.s_addr != faddr.s_addr \|\|
ebcadd38	250	inp->inp_fport != fport)
1aa87517 BJ	251	continue;
1aa87517 BJ	252	} else {
5cdc4d65	253	if (faddr.s_addr != INADDR_ANY)
1aa87517 BJ	254	wildcard++;
1aa87517 BJ	255	}
ebcadd38	256	if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
405c9168	257	continue;
1aa87517 BJ	258	if (wildcard < matchwild) {
	259	match = inp;
	260	matchwild = wildcard;
	261	if (matchwild == 0)
	262	break;
405c9168	263	}
1aa87517	264	}
405c9168	265	return (match);
af092e86	266	}