| 1 | /* |
| 2 | * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that this notice is preserved and that due credit is given |
| 7 | * to the University of California at Berkeley. The name of the University |
| 8 | * may not be used to endorse or promote products derived from this |
| 9 | * software without specific prior written permission. This software |
| 10 | * is provided ``as is'' without express or implied warranty. |
| 11 | * |
| 12 | * @(#)ns.c 7.2 (Berkeley) %G% |
| 13 | */ |
| 14 | |
| 15 | #include "param.h" |
| 16 | #include "mbuf.h" |
| 17 | #include "ioctl.h" |
| 18 | #include "protosw.h" |
| 19 | #include "socket.h" |
| 20 | #include "socketvar.h" |
| 21 | #include "uio.h" |
| 22 | #include "dir.h" |
| 23 | #include "user.h" |
| 24 | |
| 25 | |
| 26 | #include "../net/if.h" |
| 27 | #include "../net/route.h" |
| 28 | #include "../net/af.h" |
| 29 | |
| 30 | #include "ns.h" |
| 31 | #include "ns_if.h" |
| 32 | |
| 33 | #ifdef NS |
| 34 | |
| 35 | struct ns_ifaddr *ns_ifaddr; |
| 36 | |
| 37 | ns_hash(sns, hp) |
| 38 | register struct sockaddr_ns *sns; |
| 39 | struct afhash *hp; |
| 40 | { |
| 41 | register long hash = 0; |
| 42 | register u_short *s = sns->sns_addr.x_host.s_host; |
| 43 | union { |
| 44 | union ns_net net_e; |
| 45 | long long_e; |
| 46 | } net; |
| 47 | |
| 48 | net.net_e = sns->sns_addr.x_net; |
| 49 | hp->afh_nethash = net.long_e; |
| 50 | hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s; |
| 51 | hp->afh_hosthash = hash; |
| 52 | } |
| 53 | |
| 54 | |
| 55 | ns_netmatch(sns1, sns2) |
| 56 | struct sockaddr_ns *sns1, *sns2; |
| 57 | { |
| 58 | |
| 59 | return (ns_neteq(sns1->sns_addr, sns2->sns_addr)); |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * Generic internet control operations (ioctl's). |
| 64 | */ |
| 65 | /* ARGSUSED */ |
| 66 | ns_control(so, cmd, data, ifp) |
| 67 | struct socket *so; |
| 68 | int cmd; |
| 69 | caddr_t data; |
| 70 | register struct ifnet *ifp; |
| 71 | { |
| 72 | register struct ifreq *ifr = (struct ifreq *)data; |
| 73 | register struct ns_ifaddr *ia; |
| 74 | struct ifaddr *ifa; |
| 75 | struct mbuf *m; |
| 76 | |
| 77 | /* |
| 78 | * Find address for this interface, if it exists. |
| 79 | */ |
| 80 | if (ifp == 0) |
| 81 | return (EADDRNOTAVAIL); |
| 82 | for (ia = ns_ifaddr; ia; ia = ia->ia_next) |
| 83 | if (ia->ia_ifp == ifp) |
| 84 | break; |
| 85 | |
| 86 | switch (cmd) { |
| 87 | |
| 88 | case SIOCGIFADDR: |
| 89 | if (ia == (struct ns_ifaddr *)0) |
| 90 | return (EADDRNOTAVAIL); |
| 91 | ifr->ifr_addr = ia->ia_addr; |
| 92 | return (0); |
| 93 | |
| 94 | |
| 95 | case SIOCGIFBRDADDR: |
| 96 | if (ia == (struct ns_ifaddr *)0) |
| 97 | return (EADDRNOTAVAIL); |
| 98 | if ((ifp->if_flags & IFF_BROADCAST) == 0) |
| 99 | return (EINVAL); |
| 100 | ifr->ifr_dstaddr = ia->ia_broadaddr; |
| 101 | return (0); |
| 102 | |
| 103 | case SIOCGIFDSTADDR: |
| 104 | if (ia == (struct ns_ifaddr *)0) |
| 105 | return (EADDRNOTAVAIL); |
| 106 | if ((ifp->if_flags & IFF_POINTOPOINT) == 0) |
| 107 | return (EINVAL); |
| 108 | ifr->ifr_dstaddr = ia->ia_dstaddr; |
| 109 | return (0); |
| 110 | } |
| 111 | |
| 112 | if (!suser()) |
| 113 | return (u.u_error); |
| 114 | |
| 115 | switch (cmd) { |
| 116 | |
| 117 | case SIOCSIFADDR: |
| 118 | case SIOCSIFDSTADDR: |
| 119 | if (ia == (struct ns_ifaddr *)0) { |
| 120 | m = m_getclr(M_WAIT, MT_IFADDR); |
| 121 | if (m == (struct mbuf *)NULL) |
| 122 | return (ENOBUFS); |
| 123 | if (ia = ns_ifaddr) { |
| 124 | for ( ; ia->ia_next; ia = ia->ia_next) |
| 125 | ; |
| 126 | ia->ia_next = mtod(m, struct ns_ifaddr *); |
| 127 | } else |
| 128 | ns_ifaddr = mtod(m, struct ns_ifaddr *); |
| 129 | ia = mtod(m, struct ns_ifaddr *); |
| 130 | if (ifa = ifp->if_addrlist) { |
| 131 | for ( ; ifa->ifa_next; ifa = ifa->ifa_next) |
| 132 | ; |
| 133 | ifa->ifa_next = (struct ifaddr *) ia; |
| 134 | } else |
| 135 | ifp->if_addrlist = (struct ifaddr *) ia; |
| 136 | ia->ia_ifp = ifp; |
| 137 | IA_SNS(ia)->sns_family = AF_NS; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | switch (cmd) { |
| 142 | |
| 143 | case SIOCSIFDSTADDR: |
| 144 | if ((ifp->if_flags & IFF_POINTOPOINT) == 0) |
| 145 | return (EINVAL); |
| 146 | if (ia->ia_flags & IFA_ROUTE) { |
| 147 | rtinit(&ia->ia_dstaddr, &ia->ia_addr, |
| 148 | (int)SIOCDELRT, RTF_HOST); |
| 149 | ia->ia_flags &= ~IFA_ROUTE; |
| 150 | } |
| 151 | if (ifp->if_ioctl) { |
| 152 | int error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia); |
| 153 | if (error) |
| 154 | return (error); |
| 155 | } |
| 156 | ia->ia_dstaddr = ifr->ifr_dstaddr; |
| 157 | return (0); |
| 158 | |
| 159 | case SIOCSIFADDR: |
| 160 | return |
| 161 | (ns_ifinit(ifp, ia, (struct sockaddr_ns *)&ifr->ifr_addr)); |
| 162 | |
| 163 | default: |
| 164 | if (ifp->if_ioctl == 0) |
| 165 | return (EOPNOTSUPP); |
| 166 | return ((*ifp->if_ioctl)(ifp, cmd, data)); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Initialize an interface's internet address |
| 172 | * and routing table entry. |
| 173 | */ |
| 174 | ns_ifinit(ifp, ia, sns) |
| 175 | register struct ifnet *ifp; |
| 176 | register struct ns_ifaddr *ia; |
| 177 | struct sockaddr_ns *sns; |
| 178 | { |
| 179 | struct sockaddr_ns netaddr; |
| 180 | register union ns_host *h = &(IA_SNS(ia)->sns_addr.x_host); |
| 181 | int s = splimp(), error; |
| 182 | |
| 183 | /* |
| 184 | * The convention we shall adopt for naming is that |
| 185 | * a supplied address of zero means that "we don't care". |
| 186 | * if there is a single interface, use the address of that |
| 187 | * interface as our 6 byte host address. |
| 188 | * if there are multiple interfaces, use any address already |
| 189 | * used. |
| 190 | * |
| 191 | * If we have gotten into trouble and want to reset back to |
| 192 | * virginity, we recognize a request of the broadcast address. |
| 193 | */ |
| 194 | if (ns_hosteqnh(sns->sns_addr.x_host, ns_broadhost)) { |
| 195 | ns_thishost = ns_zerohost; |
| 196 | splx(s); |
| 197 | return (0); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Delete any previous route for an old address. |
| 202 | */ |
| 203 | bzero((caddr_t)&netaddr, sizeof (netaddr)); |
| 204 | netaddr.sns_family = AF_NS; |
| 205 | netaddr.sns_addr.x_host = ns_broadhost; |
| 206 | netaddr.sns_addr.x_net = ia->ia_net; |
| 207 | if (ia->ia_flags & IFA_ROUTE) { |
| 208 | if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { |
| 209 | rtinit((struct sockaddr *)&netaddr, &ia->ia_addr, |
| 210 | (int)SIOCDELRT, 0); |
| 211 | } else |
| 212 | rtinit(&ia->ia_dstaddr, &ia->ia_addr, |
| 213 | (int)SIOCDELRT, RTF_HOST); |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Set up new addresses. |
| 218 | */ |
| 219 | ia->ia_addr = *(struct sockaddr *)sns; |
| 220 | ia->ia_net = sns->sns_addr.x_net; |
| 221 | netaddr.sns_addr.x_net = ia->ia_net; |
| 222 | if (ifp->if_flags & IFF_BROADCAST) { |
| 223 | ia->ia_broadaddr = * (struct sockaddr *) &netaddr; |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Give the interface a chance to initialize |
| 228 | * if this is its first address, |
| 229 | * and to validate the address if necessary. |
| 230 | */ |
| 231 | if (ns_hosteqnh(ns_thishost, ns_zerohost)) { |
| 232 | if (ifp->if_ioctl && |
| 233 | (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) { |
| 234 | splx(s); |
| 235 | return (error); |
| 236 | } |
| 237 | ns_thishost = *h; |
| 238 | } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost) |
| 239 | || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) { |
| 240 | *h = ns_thishost; |
| 241 | if (ifp->if_ioctl && |
| 242 | (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) { |
| 243 | splx(s); |
| 244 | return (error); |
| 245 | } |
| 246 | if (!ns_hosteqnh(ns_thishost,*h)) { |
| 247 | splx(s); |
| 248 | return (EINVAL); |
| 249 | } |
| 250 | } else { |
| 251 | splx(s); |
| 252 | return (EINVAL); |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Add route for the network. |
| 257 | */ |
| 258 | if (ifp->if_flags & IFF_POINTOPOINT) |
| 259 | rtinit(&ia->ia_dstaddr, &ia->ia_addr, (int)SIOCADDRT, |
| 260 | RTF_HOST|RTF_UP); |
| 261 | else |
| 262 | rtinit(&ia->ia_broadaddr, &ia->ia_addr, (int)SIOCADDRT, |
| 263 | RTF_UP); |
| 264 | ia->ia_flags |= IFA_ROUTE; |
| 265 | return (0); |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * Return address info for specified internet network. |
| 270 | */ |
| 271 | struct ns_ifaddr * |
| 272 | ns_iaonnetof(dst) |
| 273 | register struct ns_addr *dst; |
| 274 | { |
| 275 | register struct ns_ifaddr *ia; |
| 276 | register struct ns_addr *compare; |
| 277 | register struct ifnet *ifp; |
| 278 | struct ns_ifaddr *ia_maybe = 0; |
| 279 | union ns_net net = dst->x_net; |
| 280 | |
| 281 | for (ia = ns_ifaddr; ia; ia = ia->ia_next) { |
| 282 | if (ifp = ia->ia_ifp) { |
| 283 | if (ifp->if_flags & IFF_POINTOPOINT) { |
| 284 | compare = &satons_addr(ia->ia_dstaddr); |
| 285 | if (ns_hosteq(*dst, *compare)) |
| 286 | return (ia); |
| 287 | if (ns_neteqnn(net, ia->ia_net)) |
| 288 | ia_maybe = ia; |
| 289 | } else { |
| 290 | if (ns_neteqnn(net, ia->ia_net)) |
| 291 | return (ia); |
| 292 | } |
| 293 | } |
| 294 | } |
| 295 | return (ia_maybe); |
| 296 | } |
| 297 | #endif |