diff options
author | jkh <jkh@FreeBSD.org> | 1996-10-17 18:42:33 +0000 |
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committer | jkh <jkh@FreeBSD.org> | 1996-10-17 18:42:33 +0000 |
commit | 53410b6ff1ac5ed2ff0aa1a7fd0858dfbecf0e80 (patch) | |
tree | 1b83462872ff55f51ed7439f97fec9076ac9e96a /sys/netns/ns_pcb.c | |
parent | 389ebaa4bfce63608aa7efa5d9130002ccfe764e (diff) | |
download | FreeBSD-src-53410b6ff1ac5ed2ff0aa1a7fd0858dfbecf0e80.zip FreeBSD-src-53410b6ff1ac5ed2ff0aa1a7fd0858dfbecf0e80.tar.gz |
Bring back netns so that Netcon can take over support for it, as agreed.
This was actually easier than I thought - CVS is smart enough to handle
"resurrections" now. :-)
Diffstat (limited to 'sys/netns/ns_pcb.c')
-rw-r--r-- | sys/netns/ns_pcb.c | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/sys/netns/ns_pcb.c b/sys/netns/ns_pcb.c new file mode 100644 index 0000000..1b07c32 --- /dev/null +++ b/sys/netns/ns_pcb.c @@ -0,0 +1,364 @@ +/* + * Copyright (c) 1984, 1985, 1986, 1987, 1993 + * 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. + * + * @(#)ns_pcb.c 8.1 (Berkeley) 6/10/93 + * $Id: ns_pcb.c,v 1.3 1995/05/30 08:12:28 rgrimes Exp $ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/mbuf.h> +#include <sys/errno.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/protosw.h> + +#include <net/if.h> +#include <net/route.h> + +#include <netns/ns.h> +#include <netns/ns_if.h> +#include <netns/ns_pcb.h> + +struct ns_addr zerons_addr; + +ns_pcballoc(so, head) + struct socket *so; + struct nspcb *head; +{ + struct mbuf *m; + register struct nspcb *nsp; + + m = m_getclr(M_DONTWAIT, MT_PCB); + if (m == NULL) + return (ENOBUFS); + nsp = mtod(m, struct nspcb *); + nsp->nsp_socket = so; + insque(nsp, head); + so->so_pcb = (caddr_t)nsp; + return (0); +} + +ns_pcbbind(nsp, nam) + register struct nspcb *nsp; + struct mbuf *nam; +{ + register struct sockaddr_ns *sns; + u_short lport = 0; + + if (nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr)) + return (EINVAL); + if (nam == 0) + goto noname; + sns = mtod(nam, struct sockaddr_ns *); + if (nam->m_len != sizeof (*sns)) + return (EINVAL); + if (!ns_nullhost(sns->sns_addr)) { + int tport = sns->sns_port; + + sns->sns_port = 0; /* yech... */ + if (ifa_ifwithaddr((struct sockaddr *)sns) == 0) + return (EADDRNOTAVAIL); + sns->sns_port = tport; + } + lport = sns->sns_port; + if (lport) { + u_short aport = ntohs(lport); + + if (aport < NSPORT_RESERVED && + (nsp->nsp_socket->so_state & SS_PRIV) == 0) + return (EACCES); + if (ns_pcblookup(&zerons_addr, lport, 0)) + return (EADDRINUSE); + } + nsp->nsp_laddr = sns->sns_addr; +noname: + if (lport == 0) + do { + if (nspcb.nsp_lport++ < NSPORT_RESERVED) + nspcb.nsp_lport = NSPORT_RESERVED; + lport = htons(nspcb.nsp_lport); + } while (ns_pcblookup(&zerons_addr, lport, 0)); + nsp->nsp_lport = lport; + return (0); +} + +/* + * Connect from a socket to a specified address. + * Both address and port must be specified in argument sns. + * If don't have a local address for this socket yet, + * then pick one. + */ +ns_pcbconnect(nsp, nam) + struct nspcb *nsp; + struct mbuf *nam; +{ + struct ns_ifaddr *ia; + register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *); + register struct ns_addr *dst; + register struct route *ro; + struct ifnet *ifp; + + if (nam->m_len != sizeof (*sns)) + return (EINVAL); + if (sns->sns_family != AF_NS) + return (EAFNOSUPPORT); + if (sns->sns_port==0 || ns_nullhost(sns->sns_addr)) + return (EADDRNOTAVAIL); + /* + * If we haven't bound which network number to use as ours, + * we will use the number of the outgoing interface. + * This depends on having done a routing lookup, which + * we will probably have to do anyway, so we might + * as well do it now. On the other hand if we are + * sending to multiple destinations we may have already + * done the lookup, so see if we can use the route + * from before. In any case, we only + * chose a port number once, even if sending to multiple + * destinations. + */ + ro = &nsp->nsp_route; + dst = &satons_addr(ro->ro_dst); + if (nsp->nsp_socket->so_options & SO_DONTROUTE) + goto flush; + if (!ns_neteq(nsp->nsp_lastdst, sns->sns_addr)) + goto flush; + if (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr)) { + if (ro->ro_rt && ! (ro->ro_rt->rt_flags & RTF_HOST)) { + /* can patch route to avoid rtalloc */ + *dst = sns->sns_addr; + } else { + flush: + if (ro->ro_rt) + RTFREE(ro->ro_rt); + ro->ro_rt = (struct rtentry *)0; + nsp->nsp_laddr.x_net = ns_zeronet; + } + }/* else cached route is ok; do nothing */ + nsp->nsp_lastdst = sns->sns_addr; + if ((nsp->nsp_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_NS; + ro->ro_dst.sa_len = sizeof(ro->ro_dst); + *dst = sns->sns_addr; + dst->x_port = 0; + rtalloc(ro); + } + if (ns_neteqnn(nsp->nsp_laddr.x_net, ns_zeronet)) { + /* + * If route is known or can be allocated now, + * our src addr is taken from the i/f, else punt. + */ + + ia = (struct ns_ifaddr *)0; + /* + * If we found a route, use the address + * corresponding to the outgoing interface + */ + if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp)) + for (ia = ns_ifaddr; ia; ia = ia->ia_next) + if (ia->ia_ifp == ifp) + break; + if (ia == 0) { + u_short fport = sns->sns_addr.x_port; + sns->sns_addr.x_port = 0; + ia = (struct ns_ifaddr *) + ifa_ifwithdstaddr((struct sockaddr *)sns); + sns->sns_addr.x_port = fport; + if (ia == 0) + ia = ns_iaonnetof(&sns->sns_addr); + if (ia == 0) + ia = ns_ifaddr; + if (ia == 0) + return (EADDRNOTAVAIL); + } + nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net; + } + if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0)) + return (EADDRINUSE); + if (ns_nullhost(nsp->nsp_laddr)) { + if (nsp->nsp_lport == 0) + (void) ns_pcbbind(nsp, (struct mbuf *)0); + nsp->nsp_laddr.x_host = ns_thishost; + } + nsp->nsp_faddr = sns->sns_addr; + /* Includes nsp->nsp_fport = sns->sns_port; */ + return (0); +} + +ns_pcbdisconnect(nsp) + struct nspcb *nsp; +{ + + nsp->nsp_faddr = zerons_addr; + if (nsp->nsp_socket->so_state & SS_NOFDREF) + ns_pcbdetach(nsp); +} + +ns_pcbdetach(nsp) + struct nspcb *nsp; +{ + struct socket *so = nsp->nsp_socket; + + so->so_pcb = 0; + sofree(so); + if (nsp->nsp_route.ro_rt) + rtfree(nsp->nsp_route.ro_rt); + remque(nsp); + (void) m_free(dtom(nsp)); +} + +ns_setsockaddr(nsp, nam) + register struct nspcb *nsp; + struct mbuf *nam; +{ + register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *); + + nam->m_len = sizeof (*sns); + sns = mtod(nam, struct sockaddr_ns *); + bzero((caddr_t)sns, sizeof (*sns)); + sns->sns_len = sizeof(*sns); + sns->sns_family = AF_NS; + sns->sns_addr = nsp->nsp_laddr; +} + +ns_setpeeraddr(nsp, nam) + register struct nspcb *nsp; + struct mbuf *nam; +{ + register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *); + + nam->m_len = sizeof (*sns); + sns = mtod(nam, struct sockaddr_ns *); + bzero((caddr_t)sns, sizeof (*sns)); + sns->sns_len = sizeof(*sns); + sns->sns_family = AF_NS; + sns->sns_addr = nsp->nsp_faddr; +} + +/* + * Pass some notification to all connections of a protocol + * associated with address dst. Call the + * protocol specific routine to handle each connection. + * Also pass an extra paramter via the nspcb. (which may in fact + * be a parameter list!) + */ +ns_pcbnotify(dst, errno, notify, param) + register struct ns_addr *dst; + long param; + int errno, (*notify)(); +{ + register struct nspcb *nsp, *oinp; + int s = splimp(); + + for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) { + if (!ns_hosteq(*dst,nsp->nsp_faddr)) { + next: + nsp = nsp->nsp_next; + continue; + } + if (nsp->nsp_socket == 0) + goto next; + if (errno) + nsp->nsp_socket->so_error = errno; + oinp = nsp; + nsp = nsp->nsp_next; + oinp->nsp_notify_param = param; + (*notify)(oinp); + } + splx(s); +} + +#ifdef notdef +/* + * After a routing change, flush old routing + * and allocate a (hopefully) better one. + */ +ns_rtchange(nsp) + struct nspcb *nsp; +{ + if (nsp->nsp_route.ro_rt) { + rtfree(nsp->nsp_route.ro_rt); + nsp->nsp_route.ro_rt = 0; + /* + * A new route can be allocated the next time + * output is attempted. + */ + } + /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ +} +#endif + +struct nspcb * +ns_pcblookup(faddr, lport, wildp) + struct ns_addr *faddr; + u_short lport; +{ + register struct nspcb *nsp, *match = 0; + int matchwild = 3, wildcard; + u_short fport; + + fport = faddr->x_port; + for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) { + if (nsp->nsp_lport != lport) + continue; + wildcard = 0; + if (ns_nullhost(nsp->nsp_faddr)) { + if (!ns_nullhost(*faddr)) + wildcard++; + } else { + if (ns_nullhost(*faddr)) + wildcard++; + else { + if (!ns_hosteq(nsp->nsp_faddr, *faddr)) + continue; + if (nsp->nsp_fport != fport) { + if (nsp->nsp_fport != 0) + continue; + else + wildcard++; + } + } + } + if (wildcard && wildp==0) + continue; + if (wildcard < matchwild) { + match = nsp; + matchwild = wildcard; + if (wildcard == 0) + break; + } + } + return (match); +} |