projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8ae0e4b4 KM |
1 | /* |
| 2 | * Copyright (c) 1982 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 | * @(#)ns_output.c 6.3 (Berkeley) %G% | |
| 7 | */ | |
| 91fdd342 KS |
8 | |
| 9 | #include "param.h" | |
| 10 | #include "mbuf.h" | |
| 11 | #include "errno.h" | |
| 12 | #include "socket.h" | |
| 13 | #include "socketvar.h" | |
| 14 | ||
| 15 | #include "../net/if.h" | |
| 16 | #include "../net/route.h" | |
| 17 | ||
| 18 | #include "ns.h" | |
| 19 | #include "ns_if.h" | |
| 20 | #include "idp.h" | |
| 21 | #include "idp_var.h" | |
| 22 | ||
| 23 | #ifdef vax | |
| 24 | #include "../vax/mtpr.h" | |
| 25 | #endif | |
| 6bbc5804 KS |
26 | int ns_hold_output = 0; |
| 27 | int ns_copy_output = 0; | |
| 28 | int ns_output_cnt = 0; | |
| 91fdd342 KS |
29 | struct mbuf *ns_lastout; |
| 30 | ||
| 91fdd342 KS |
31 | ns_output(m0, ro, flags) |
| 32 | struct mbuf *m0; | |
| 33 | struct route *ro; | |
| 34 | int flags; | |
| 35 | { | |
| 36 | register struct idp *idp = mtod(m0, struct idp *); | |
| 37 | register struct ifnet *ifp; | |
| 38 | register struct mbuf *m; | |
| 39 | int len, rlen, off, error = 0; | |
| 40 | struct route idproute; | |
| 41 | struct sockaddr_ns *dst; | |
| 42 | extern int idpcksum; | |
| 43 | ||
| 44 | if(ns_hold_output) { | |
| 45 | if(ns_lastout) { | |
| 46 | m_free(ns_lastout); | |
| 47 | } | |
| 48 | ns_lastout = m_copy(m0, 0, M_COPYALL); | |
| 49 | } | |
| 50 | if(ns_copy_output) { | |
| 51 | ns_watch_output(m0); | |
| 52 | } | |
| 53 | ||
| 54 | /* | |
| 55 | * Route packet. | |
| 56 | */ | |
| 57 | if (ro == 0) { | |
| 58 | ro = &idproute; | |
| 59 | bzero((caddr_t)ro, sizeof (*ro)); | |
| 60 | } | |
| 61 | dst = (struct sockaddr_ns *)&ro->ro_dst; | |
| 62 | if (ro->ro_rt == 0) { | |
| 63 | dst->sns_family = AF_NS; | |
| 64 | dst->sns_addr = idp->idp_dna; | |
| 65 | /* | |
| 66 | * If routing to interface only, | |
| 67 | * short circuit routing lookup. | |
| 68 | */ | |
| 69 | if (flags & NS_ROUTETOIF) { | |
| 70 | struct ns_ifaddr *ia; | |
| 71 | ia = ns_iaonnetof(idp->idp_dna.x_net); | |
| 72 | if (ia == 0) { | |
| 73 | error = ENETUNREACH; | |
| 74 | goto bad; | |
| 75 | } | |
| 76 | ifp = ia->ia_ifp; | |
| 77 | goto gotif; | |
| 78 | } | |
| 79 | rtalloc(ro); | |
| 80 | } else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) { | |
| 81 | /* | |
| 82 | * The old route has gone away; try for a new one. | |
| 83 | */ | |
| 84 | rtfree(ro->ro_rt); | |
| 85 | rtalloc(ro); | |
| 86 | } | |
| 87 | if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) { | |
| 88 | error = ENETUNREACH; | |
| 89 | goto bad; | |
| 90 | } | |
| 91 | ro->ro_rt->rt_use++; | |
| 92 | if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST)) | |
| 93 | dst = (struct sockaddr_ns *)&ro->ro_rt->rt_gateway; | |
| 94 | gotif: | |
| 95 | ||
| 96 | /* | |
| 97 | * Look for multicast addresses and | |
| 98 | * and verify user is allowed to send | |
| 99 | * such a packet. | |
| 100 | */ | |
| 101 | if (dst->sns_addr.x_host.c_host[0]&1) { | |
| 102 | if ((ifp->if_flags & IFF_BROADCAST) == 0) { | |
| 103 | error = EADDRNOTAVAIL; | |
| 104 | goto bad; | |
| 105 | } | |
| 106 | if ((flags & NS_ALLOWBROADCAST) == 0) { | |
| 107 | error = EACCES; | |
| 108 | goto bad; | |
| 109 | } | |
| 110 | } | |
| 111 | ||
| 112 | if (htons(idp->idp_len) <= ifp->if_mtu) { | |
| 113 | ns_output_cnt++; | |
| 114 | error = (*ifp->if_output)(ifp, m0, (struct sockaddr *)dst); | |
| 115 | goto done; | |
| 116 | } else error = EMSGSIZE; | |
| 117 | ||
| 118 | ||
| 119 | bad: | |
| 120 | m_freem(m0); | |
| 121 | done: | |
| 122 | if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) | |
| 123 | RTFREE(ro->ro_rt); | |
| 124 | return (error); | |
| 125 | } |