diff options
Diffstat (limited to 'c/src/exec/libnetworking/netinet/in_pcb.c')
| -rw-r--r-- | c/src/exec/libnetworking/netinet/in_pcb.c | 757 |
1 files changed, 0 insertions, 757 deletions
diff --git a/c/src/exec/libnetworking/netinet/in_pcb.c b/c/src/exec/libnetworking/netinet/in_pcb.c deleted file mode 100644 index 116f70eebf..0000000000 --- a/c/src/exec/libnetworking/netinet/in_pcb.c +++ /dev/null @@ -1,757 +0,0 @@ -/* - * Copyright (c) 1982, 1986, 1991, 1993, 1995 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 - * $Id$ - */ - -#include <sys/param.h> -#include <sys/queue.h> -#include <sys/systm.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/protosw.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/ioctl.h> -#include <sys/errno.h> -#include <sys/time.h> -#include <sys/proc.h> -#include <sys/kernel.h> -#include <sys/sysctl.h> - -#include <net/if.h> -#include <net/route.h> - -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <netinet/in_pcb.h> -#include <netinet/in_var.h> -#include <netinet/ip_var.h> - -struct in_addr zeroin_addr; - -static void in_pcbinshash __P((struct inpcb *)); -static void in_rtchange __P((struct inpcb *, int)); - -/* - * These configure the range of local port addresses assigned to - * "unspecified" outgoing connections/packets/whatever. - */ -static int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */ -static int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */ -static int ipport_firstauto = IPPORT_RESERVED; /* 1024 */ -static int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */ -static int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 40000 */ -static int ipport_hilastauto = IPPORT_HILASTAUTO; /* 44999 */ - -#define RANGECHK(var, min, max) \ - if ((var) < (min)) { (var) = (min); } \ - else if ((var) > (max)) { (var) = (max); } - -#if 0 -static int -sysctl_net_ipport_check SYSCTL_HANDLER_ARGS -{ - int error = sysctl_handle_int(oidp, - oidp->oid_arg1, oidp->oid_arg2, req); - if (!error) { - RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1); - RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1); - RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX); - RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX); - RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX); - RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX); - } - return error; -} -#endif - -#undef RANGECHK - -SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports"); - -SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW, - &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", ""); -SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW, - &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", ""); -SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW, - &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", ""); -SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW, - &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", ""); -SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW, - &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", ""); -SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW, - &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", ""); - -int -in_pcballoc(so, pcbinfo) - struct socket *so; - struct inpcbinfo *pcbinfo; -{ - register struct inpcb *inp; - int s; - - MALLOC(inp, struct inpcb *, sizeof(*inp), M_PCB, M_NOWAIT); - if (inp == NULL) - return (ENOBUFS); - bzero((caddr_t)inp, sizeof(*inp)); - inp->inp_pcbinfo = pcbinfo; - inp->inp_socket = so; - s = splnet(); - LIST_INSERT_HEAD(pcbinfo->listhead, inp, inp_list); - in_pcbinshash(inp); - splx(s); - so->so_pcb = (caddr_t)inp; - return (0); -} - -int -in_pcbbind(inp, nam) - register struct inpcb *inp; - struct mbuf *nam; -{ - register struct socket *so = inp->inp_socket; - unsigned short *lastport; - struct sockaddr_in *sin; - u_short lport = 0; - int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); - int error; - - if (in_ifaddr == 0) - return (EADDRNOTAVAIL); - if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY) - return (EINVAL); - if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && - ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || - (so->so_options & SO_ACCEPTCONN) == 0)) - wild = 1; - if (nam) { - sin = mtod(nam, struct sockaddr_in *); - if (nam->m_len != sizeof (*sin)) - return (EINVAL); -#ifdef notdef - /* - * We should check the family, but old programs - * incorrectly fail to initialize it. - */ - if (sin->sin_family != AF_INET) - return (EAFNOSUPPORT); -#endif - lport = sin->sin_port; - if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { - /* - * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; - * allow complete duplication of binding if - * SO_REUSEPORT is set, or if SO_REUSEADDR is set - * and a multicast address is bound on both - * new and duplicated sockets. - */ - if (so->so_options & SO_REUSEADDR) - reuseport = SO_REUSEADDR|SO_REUSEPORT; - } else if (sin->sin_addr.s_addr != INADDR_ANY) { - sin->sin_port = 0; /* yech... */ - if (ifa_ifwithaddr((struct sockaddr *)sin) == 0) - return (EADDRNOTAVAIL); - } - if (lport) { - struct inpcb *t; - - /* GROSS */ - if (ntohs(lport) < IPPORT_RESERVED && - (error = suser(p->p_ucred, &p->p_acflag))) - return (EACCES); - if (so->so_uid) { - t = in_pcblookup(inp->inp_pcbinfo, zeroin_addr, - 0, sin->sin_addr, lport, - INPLOOKUP_WILDCARD); - if (t && (so->so_uid != t->inp_socket->so_uid)) - return (EADDRINUSE); - } - t = in_pcblookup(inp->inp_pcbinfo, zeroin_addr, 0, - sin->sin_addr, lport, wild); - if (t && (reuseport & t->inp_socket->so_options) == 0) - return (EADDRINUSE); - } - inp->inp_laddr = sin->sin_addr; - } - if (lport == 0) { - ushort first, last; - int count; - - inp->inp_flags |= INP_ANONPORT; - - if (inp->inp_flags & INP_HIGHPORT) { - first = ipport_hifirstauto; /* sysctl */ - last = ipport_hilastauto; - lastport = &inp->inp_pcbinfo->lasthi; - } else if (inp->inp_flags & INP_LOWPORT) { - if ((error = suser(p->p_ucred, &p->p_acflag))) - return (EACCES); - first = ipport_lowfirstauto; /* 1023 */ - last = ipport_lowlastauto; /* 600 */ - lastport = &inp->inp_pcbinfo->lastlow; - } else { - first = ipport_firstauto; /* sysctl */ - last = ipport_lastauto; - lastport = &inp->inp_pcbinfo->lastport; - } - /* - * Simple check to ensure all ports are not used up causing - * a deadlock here. - * - * We split the two cases (up and down) so that the direction - * is not being tested on each round of the loop. - */ - if (first > last) { - /* - * counting down - */ - count = first - last; - - do { - if (count-- <= 0) /* completely used? */ - return (EADDRNOTAVAIL); - --*lastport; - if (*lastport > first || *lastport < last) - *lastport = first; - lport = htons(*lastport); - } while (in_pcblookup(inp->inp_pcbinfo, - zeroin_addr, 0, inp->inp_laddr, lport, wild)); - } else { - /* - * counting up - */ - count = last - first; - - do { - if (count-- <= 0) /* completely used? */ - return (EADDRNOTAVAIL); - ++*lastport; - if (*lastport < first || *lastport > last) - *lastport = first; - lport = htons(*lastport); - } while (in_pcblookup(inp->inp_pcbinfo, - zeroin_addr, 0, inp->inp_laddr, lport, wild)); - } - } - inp->inp_lport = lport; - in_pcbrehash(inp); - return (0); -} - -/* - * Transform old in_pcbconnect() into an inner subroutine for new - * in_pcbconnect(): Do some validity-checking on the remote - * address (in mbuf 'nam') and then determine local host address - * (i.e., which interface) to use to access that remote host. - * - * This preserves definition of in_pcbconnect(), while supporting a - * slightly different version for T/TCP. (This is more than - * a bit of a kludge, but cleaning up the internal interfaces would - * have forced minor changes in every protocol). - */ - -int -in_pcbladdr(inp, nam, plocal_sin) - register struct inpcb *inp; - struct mbuf *nam; - struct sockaddr_in **plocal_sin; -{ - struct in_ifaddr *ia; - 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_port == 0) - return (EADDRNOTAVAIL); - if (in_ifaddr) { - /* - * If the destination address is INADDR_ANY, - * use the primary local address. - * If the supplied address is INADDR_BROADCAST, - * and the primary interface supports broadcast, - * choose the broadcast address for that interface. - */ -#define satosin(sa) ((struct sockaddr_in *)(sa)) -#define sintosa(sin) ((struct sockaddr *)(sin)) -#define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) - if (sin->sin_addr.s_addr == INADDR_ANY) - sin->sin_addr = IA_SIN(in_ifaddr)->sin_addr; - else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST && - (in_ifaddr->ia_ifp->if_flags & IFF_BROADCAST)) - sin->sin_addr = satosin(&in_ifaddr->ia_broadaddr)->sin_addr; - } - if (inp->inp_laddr.s_addr == INADDR_ANY) { - register struct route *ro; - - ia = (struct in_ifaddr *)0; - /* - * If route is known or can be allocated now, - * our src addr is taken from the i/f, else punt. - */ - ro = &inp->inp_route; - if (ro->ro_rt && - (satosin(&ro->ro_dst)->sin_addr.s_addr != - sin->sin_addr.s_addr || - inp->inp_socket->so_options & SO_DONTROUTE)) { - RTFREE(ro->ro_rt); - ro->ro_rt = (struct rtentry *)0; - } - if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ - (ro->ro_rt == (struct rtentry *)0 || - ro->ro_rt->rt_ifp == (struct ifnet *)0)) { - /* No route yet, so try to acquire one */ - ro->ro_dst.sa_family = AF_INET; - ro->ro_dst.sa_len = sizeof(struct sockaddr_in); - ((struct sockaddr_in *) &ro->ro_dst)->sin_addr = - sin->sin_addr; - rtalloc(ro); - } - /* - * If we found a route, use the address - * corresponding to the outgoing interface - * unless it is the loopback (in case a route - * to our address on another net goes to loopback). - */ - if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) - ia = ifatoia(ro->ro_rt->rt_ifa); - if (ia == 0) { - u_short fport = sin->sin_port; - - sin->sin_port = 0; - ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin))); - if (ia == 0) - ia = ifatoia(ifa_ifwithnet(sintosa(sin))); - sin->sin_port = fport; - if (ia == 0) - ia = in_ifaddr; - if (ia == 0) - return (EADDRNOTAVAIL); - } - /* - * If the destination address is multicast and an outgoing - * interface has been set as a multicast option, use the - * address of that interface as our source address. - */ - if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) && - inp->inp_moptions != NULL) { - struct ip_moptions *imo; - struct ifnet *ifp; - - imo = inp->inp_moptions; - if (imo->imo_multicast_ifp != NULL) { - ifp = imo->imo_multicast_ifp; - for (ia = in_ifaddr; ia; ia = ia->ia_next) - if (ia->ia_ifp == ifp) - break; - if (ia == 0) - return (EADDRNOTAVAIL); - } - } - /* - * Don't do pcblookup call here; return interface in plocal_sin - * and exit to caller, that will do the lookup. - */ - *plocal_sin = &ia->ia_addr; - - } - return(0); -} - -/* - * Outer subroutine: - * 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. - */ -int -in_pcbconnect(inp, nam) - register struct inpcb *inp; - struct mbuf *nam; -{ - struct sockaddr_in *ifaddr; - register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); - int error; - - /* - * Call inner routine, to assign local interface address. - */ - if ((error = in_pcbladdr(inp, nam, &ifaddr))) - return(error); - - if (in_pcblookuphash(inp->inp_pcbinfo, sin->sin_addr, sin->sin_port, - inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr, - inp->inp_lport, 0) != NULL) - return (EADDRINUSE); - if (inp->inp_laddr.s_addr == INADDR_ANY) { - if (inp->inp_lport == 0) - (void)in_pcbbind(inp, (struct mbuf *)0); - inp->inp_laddr = ifaddr->sin_addr; - } - inp->inp_faddr = sin->sin_addr; - inp->inp_fport = sin->sin_port; - in_pcbrehash(inp); - return (0); -} - -void -in_pcbdisconnect(inp) - struct inpcb *inp; -{ - - inp->inp_faddr.s_addr = INADDR_ANY; - inp->inp_fport = 0; - in_pcbrehash(inp); - if (inp->inp_socket->so_state & SS_NOFDREF) - in_pcbdetach(inp); -} - -void -in_pcbdetach(inp) - struct inpcb *inp; -{ - struct socket *so = inp->inp_socket; - int s; - - so->so_pcb = 0; - sofree(so); - if (inp->inp_options) - (void)m_free(inp->inp_options); - if (inp->inp_route.ro_rt) - rtfree(inp->inp_route.ro_rt); - ip_freemoptions(inp->inp_moptions); - s = splnet(); - LIST_REMOVE(inp, inp_hash); - LIST_REMOVE(inp, inp_list); - splx(s); - FREE(inp, M_PCB); -} - -void -in_setsockaddr(inp, nam) - register struct inpcb *inp; - struct mbuf *nam; -{ - register struct sockaddr_in *sin; - - nam->m_len = sizeof (*sin); - sin = mtod(nam, struct sockaddr_in *); - bzero((caddr_t)sin, sizeof (*sin)); - sin->sin_family = AF_INET; - sin->sin_len = sizeof(*sin); - sin->sin_port = inp->inp_lport; - sin->sin_addr = inp->inp_laddr; -} - -void -in_setpeeraddr(inp, nam) - struct inpcb *inp; - struct mbuf *nam; -{ - register struct sockaddr_in *sin; - - nam->m_len = sizeof (*sin); - sin = mtod(nam, struct sockaddr_in *); - bzero((caddr_t)sin, sizeof (*sin)); - sin->sin_family = AF_INET; - sin->sin_len = sizeof(*sin); - sin->sin_port = inp->inp_fport; - sin->sin_addr = inp->inp_faddr; -} - -/* - * Pass some notification to all connections of a protocol - * associated with address dst. The local address and/or port numbers - * may be specified to limit the search. The "usual action" will be - * taken, depending on the ctlinput cmd. The caller must filter any - * cmds that are uninteresting (e.g., no error in the map). - * Call the protocol specific routine (if any) to report - * any errors for each matching socket. - * - * Must be called at splnet. - */ -void -in_pcbnotify(head, dst, fport_arg, laddr, lport_arg, cmd, notify) - struct inpcbhead *head; - struct sockaddr *dst; - u_int fport_arg, lport_arg; - struct in_addr laddr; - int cmd; - void (*notify) __P((struct inpcb *, int)); -{ - register struct inpcb *inp, *oinp; - struct in_addr faddr; - u_short fport = fport_arg, lport = lport_arg; - int errnum, s; - - if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET) - return; - faddr = ((struct sockaddr_in *)dst)->sin_addr; - if (faddr.s_addr == INADDR_ANY) - return; - - /* - * Redirects go to all references to the destination, - * and use in_rtchange to invalidate the route cache. - * Dead host indications: notify all references to the destination. - * Otherwise, if we have knowledge of the local port and address, - * deliver only to that socket. - */ - if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { - fport = 0; - lport = 0; - laddr.s_addr = 0; - if (cmd != PRC_HOSTDEAD) - notify = in_rtchange; - } - errnum = inetctlerrmap[cmd]; - s = splnet(); - for (inp = head->lh_first; inp != NULL;) { - if (inp->inp_faddr.s_addr != faddr.s_addr || - inp->inp_socket == 0 || - (lport && inp->inp_lport != lport) || - (laddr.s_addr && inp->inp_laddr.s_addr != laddr.s_addr) || - (fport && inp->inp_fport != fport)) { - inp = inp->inp_list.le_next; - continue; - } - oinp = inp; - inp = inp->inp_list.le_next; - if (notify) - (*notify)(oinp, errnum); - } - splx(s); -} - -/* - * Check for alternatives when higher level complains - * about service problems. For now, invalidate cached - * routing information. If the route was created dynamically - * (by a redirect), time to try a default gateway again. - */ -void -in_losing(inp) - struct inpcb *inp; -{ - register struct rtentry *rt; - struct rt_addrinfo info; - - if ((rt = inp->inp_route.ro_rt)) { - inp->inp_route.ro_rt = 0; - bzero((caddr_t)&info, sizeof(info)); - info.rti_info[RTAX_DST] = - (struct sockaddr *)&inp->inp_route.ro_dst; - info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; - info.rti_info[RTAX_NETMASK] = rt_mask(rt); - rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); - if (rt->rt_flags & RTF_DYNAMIC) - (void) rtrequest(RTM_DELETE, rt_key(rt), - rt->rt_gateway, rt_mask(rt), rt->rt_flags, - (struct rtentry **)0); - else - /* - * A new route can be allocated - * the next time output is attempted. - */ - rtfree(rt); - } -} - -/* - * After a routing change, flush old routing - * and allocate a (hopefully) better one. - */ -static void -in_rtchange(inp, errnum) - register struct inpcb *inp; - int errnum; -{ - if (inp->inp_route.ro_rt) { - rtfree(inp->inp_route.ro_rt); - inp->inp_route.ro_rt = 0; - /* - * A new route can be allocated the next time - * output is attempted. - */ - } -} - -struct inpcb * -in_pcblookup(pcbinfo, faddr, fport_arg, laddr, lport_arg, wild_okay) - struct inpcbinfo *pcbinfo; - struct in_addr faddr, laddr; - u_int fport_arg, lport_arg; - int wild_okay; -{ - register struct inpcb *inp, *match = NULL; - int matchwild = 3, wildcard; - u_short fport = fport_arg, lport = lport_arg; - int s; - - s = splnet(); - - for (inp = pcbinfo->listhead->lh_first; inp != NULL; inp = inp->inp_list.le_next) { - if (inp->inp_lport != lport) - continue; - wildcard = 0; - 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 (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 (wildcard && wild_okay == 0) - continue; - if (wildcard < matchwild) { - match = inp; - matchwild = wildcard; - if (matchwild == 0) { - break; - } - } - } - splx(s); - return (match); -} - -/* - * Lookup PCB in hash list. - */ -struct inpcb * -in_pcblookuphash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard) - struct inpcbinfo *pcbinfo; - struct in_addr faddr, laddr; - u_int fport_arg, lport_arg; - int wildcard; -{ - struct inpcbhead *head; - register struct inpcb *inp; - u_short fport = fport_arg, lport = lport_arg; - int s; - - s = splnet(); - /* - * First look for an exact match. - */ - head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, pcbinfo->hashmask)]; - for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { - if (inp->inp_faddr.s_addr == faddr.s_addr && - inp->inp_laddr.s_addr == laddr.s_addr && - inp->inp_fport == fport && - inp->inp_lport == lport) - goto found; - } - if (wildcard) { - struct inpcb *local_wild = NULL; - - head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)]; - for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { - if (inp->inp_faddr.s_addr == INADDR_ANY && - inp->inp_fport == 0 && inp->inp_lport == lport) { - if (inp->inp_laddr.s_addr == laddr.s_addr) - goto found; - else if (inp->inp_laddr.s_addr == INADDR_ANY) - local_wild = inp; - } - } - if (local_wild != NULL) { - inp = local_wild; - goto found; - } - } - splx(s); - return (NULL); - -found: - /* - * Move PCB to head of this hash chain so that it can be - * found more quickly in the future. - * XXX - this is a pessimization on machines with few - * concurrent connections. - */ - if (inp != head->lh_first) { - LIST_REMOVE(inp, inp_hash); - LIST_INSERT_HEAD(head, inp, inp_hash); - } - splx(s); - return (inp); -} - -/* - * Insert PCB into hash chain. Must be called at splnet. - */ -static void -in_pcbinshash(inp) - struct inpcb *inp; -{ - struct inpcbhead *head; - - head = &inp->inp_pcbinfo->hashbase[INP_PCBHASH(inp->inp_faddr.s_addr, - inp->inp_lport, inp->inp_fport, inp->inp_pcbinfo->hashmask)]; - - LIST_INSERT_HEAD(head, inp, inp_hash); -} - -void -in_pcbrehash(inp) - struct inpcb *inp; -{ - struct inpcbhead *head; - int s; - - s = splnet(); - LIST_REMOVE(inp, inp_hash); - - head = &inp->inp_pcbinfo->hashbase[INP_PCBHASH(inp->inp_faddr.s_addr, - inp->inp_lport, inp->inp_fport, inp->inp_pcbinfo->hashmask)]; - - LIST_INSERT_HEAD(head, inp, inp_hash); - splx(s); -} |