| 1 | /* idp_usrreq.c 6.1 85/05/30 */ |
| 2 | |
| 3 | #include "param.h" |
| 4 | #include "dir.h" |
| 5 | #include "user.h" |
| 6 | #include "mbuf.h" |
| 7 | #include "protosw.h" |
| 8 | #include "socket.h" |
| 9 | #include "socketvar.h" |
| 10 | #include "errno.h" |
| 11 | #include "stat.h" |
| 12 | |
| 13 | #include "../net/if.h" |
| 14 | #include "../net/route.h" |
| 15 | |
| 16 | #include "ns.h" |
| 17 | #include "ns_pcb.h" |
| 18 | #include "idp.h" |
| 19 | #include "idp_var.h" |
| 20 | #include "ns_error.h" |
| 21 | |
| 22 | /* |
| 23 | * IDP protocol implementation. |
| 24 | */ |
| 25 | |
| 26 | struct sockaddr_ns idp_ns = { AF_NS }; |
| 27 | |
| 28 | int |
| 29 | idp_input_panic = 1; |
| 30 | idp_input(m, nsp) |
| 31 | struct mbuf *m; |
| 32 | register struct nspcb *nsp; |
| 33 | { |
| 34 | register struct idp *idp = mtod(m, struct idp *); |
| 35 | if (idp_input_panic) { |
| 36 | if ((nsp==0) || ((idp->idp_pt==5) && (!(nsp->nsp_flags&NSP_RAWIN)))) |
| 37 | panic("Impossible idp_input"); |
| 38 | } |
| 39 | |
| 40 | /* |
| 41 | * Construct sockaddr format source address. |
| 42 | * Stuff source address and datagram in user buffer. |
| 43 | */ |
| 44 | idp_ns.sns_addr = idp->idp_sna; |
| 45 | nsp->nsp_rpt = idp->idp_pt; |
| 46 | if ( ! (nsp->nsp_flags & NSP_RAWIN) ) { |
| 47 | m->m_len -= sizeof (struct idp); |
| 48 | m->m_off += sizeof (struct idp); |
| 49 | } |
| 50 | if (sbappendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns, |
| 51 | m, (struct mbuf *)0) == 0) |
| 52 | goto bad; |
| 53 | sorwakeup(nsp->nsp_socket); |
| 54 | return; |
| 55 | bad: |
| 56 | m_freem(m); |
| 57 | } |
| 58 | |
| 59 | idp_abort(nsp) |
| 60 | struct nspcb *nsp; |
| 61 | { |
| 62 | struct socket *so = nsp->nsp_socket; |
| 63 | |
| 64 | ns_pcbdisconnect(nsp); |
| 65 | soisdisconnected(so); |
| 66 | } |
| 67 | |
| 68 | idp_output(nsp, m0) |
| 69 | struct nspcb *nsp; |
| 70 | struct mbuf *m0; |
| 71 | { |
| 72 | register struct mbuf *m; |
| 73 | register struct idp *idp; |
| 74 | register struct socket *so; |
| 75 | register int len = 0; |
| 76 | register struct route *ro; |
| 77 | struct mbuf *mprev; |
| 78 | extern int idpcksum; |
| 79 | |
| 80 | /* |
| 81 | * Calculate data length. |
| 82 | */ |
| 83 | for (m = m0; m; m = m->m_next) { |
| 84 | mprev = m; |
| 85 | len += m->m_len; |
| 86 | } |
| 87 | /* |
| 88 | * Make sure packet is actually of even length. |
| 89 | */ |
| 90 | |
| 91 | if (len & 1) { |
| 92 | m = mprev; |
| 93 | if (m->m_len + m->m_off < MMAXOFF) { |
| 94 | m->m_len++; |
| 95 | } else { |
| 96 | struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA); |
| 97 | |
| 98 | if (m1 == 0) return (ENOBUFS); |
| 99 | m1->m_len = 1; |
| 100 | m1->m_off = MMAXOFF - 1; |
| 101 | * mtod(m1, char *) = 0; |
| 102 | m->m_next = m1; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Fill in mbuf with extended IDP header |
| 108 | * and addresses and length put into network format. |
| 109 | */ |
| 110 | if (nsp->nsp_flags & NSP_RAWOUT) { |
| 111 | m = m0; |
| 112 | idp = mtod(m, struct idp *); |
| 113 | } else { |
| 114 | m = m_get(M_DONTWAIT, MT_HEADER); |
| 115 | if (m == 0) { |
| 116 | m_freem(m0); |
| 117 | return (ENOBUFS); |
| 118 | } |
| 119 | m->m_off = MMAXOFF - sizeof (struct idp); |
| 120 | m->m_len = sizeof (struct idp); |
| 121 | m->m_next = m0; |
| 122 | idp = mtod(m, struct idp *); |
| 123 | idp->idp_tc = 0; |
| 124 | idp->idp_pt = nsp->nsp_dpt; |
| 125 | idp->idp_sna = nsp->nsp_laddr; |
| 126 | idp->idp_dna = nsp->nsp_faddr; |
| 127 | len += sizeof (struct idp); |
| 128 | } |
| 129 | |
| 130 | idp->idp_len = htons((u_short)len); |
| 131 | |
| 132 | if (idpcksum) { |
| 133 | idp->idp_sum = 0; |
| 134 | len = ((len - 1) | 1) + 1; |
| 135 | idp->idp_sum = ns_cksum(m, len); |
| 136 | } else |
| 137 | idp->idp_sum = 0xffff; |
| 138 | |
| 139 | /* |
| 140 | * Output datagram. |
| 141 | */ |
| 142 | so = nsp->nsp_socket; |
| 143 | if (so->so_options & SO_DONTROUTE) |
| 144 | return (ns_output(m, (struct route *)0, |
| 145 | (so->so_options & SO_BROADCAST) | NS_ROUTETOIF)); |
| 146 | /* |
| 147 | * Use cached route for previous datagram if |
| 148 | * this is also to the same destination. |
| 149 | * |
| 150 | * NB: We don't handle broadcasts because that |
| 151 | * would require 3 subroutine calls. |
| 152 | */ |
| 153 | ro = &nsp->nsp_route; |
| 154 | if (ro->ro_rt && |
| 155 | ((*(long *)&nsp->nsp_lastnet)!=ns_netof(idp->idp_dna)) && |
| 156 | !(ns_hosteq(satons_addr(ro->ro_dst), idp->idp_dna))) { |
| 157 | RTFREE(ro->ro_rt); |
| 158 | ro->ro_rt = (struct rtentry *)0; |
| 159 | nsp->nsp_lastnet = idp->idp_dna.x_net; |
| 160 | } |
| 161 | return (ns_output(m, ro, so->so_options & SO_BROADCAST)); |
| 162 | } |
| 163 | /*ARGSUSED*/ |
| 164 | idp_ctloutput(req, so, level, name, value) |
| 165 | int req, level; |
| 166 | struct socket *so; |
| 167 | int name; |
| 168 | struct mbuf **value; |
| 169 | { |
| 170 | register struct mbuf *m; |
| 171 | struct nspcb *nsp = sotonspcb(so); |
| 172 | int mask, error = 0; |
| 173 | |
| 174 | if (nsp == NULL) { |
| 175 | error = EINVAL; |
| 176 | goto release; |
| 177 | } |
| 178 | |
| 179 | switch (req) { |
| 180 | case PRCO_GETOPT: |
| 181 | if (value==NULL) { |
| 182 | error = EINVAL; |
| 183 | goto release; |
| 184 | } |
| 185 | m = m_get(M_DONTWAIT, MT_DATA); |
| 186 | switch (name) { |
| 187 | case SO_HEADERS_ON_INPUT: |
| 188 | mask = NSP_RAWIN; |
| 189 | goto get_flags; |
| 190 | case SO_HEADERS_ON_OUTPUT: |
| 191 | mask = NSP_RAWOUT; |
| 192 | get_flags: |
| 193 | m->m_len = sizeof(short); |
| 194 | m->m_off = MMAXOFF - sizeof(short); |
| 195 | *mtod(m, short *) = nsp->nsp_flags & mask; |
| 196 | break; |
| 197 | case SO_DEFAULT_HEADERS: |
| 198 | m->m_len = sizeof(struct idp); |
| 199 | m->m_off = MMAXOFF - sizeof(struct idp); |
| 200 | { |
| 201 | register struct idp *idp = mtod(m, struct idp *); |
| 202 | idp->idp_len = 0; |
| 203 | idp->idp_sum = 0; |
| 204 | idp->idp_tc = 0; |
| 205 | idp->idp_pt = nsp->nsp_dpt; |
| 206 | idp->idp_dna = nsp->nsp_faddr; |
| 207 | idp->idp_sna = nsp->nsp_laddr; |
| 208 | } |
| 209 | } |
| 210 | *value = m; |
| 211 | break; |
| 212 | case PRCO_SETOPT: |
| 213 | switch (name) { |
| 214 | int mask, *ok; |
| 215 | |
| 216 | case SO_HEADERS_ON_INPUT: |
| 217 | mask = NSP_RAWIN; |
| 218 | goto set_head; |
| 219 | case SO_HEADERS_ON_OUTPUT: |
| 220 | mask = NSP_RAWOUT; |
| 221 | set_head: |
| 222 | if (value && *value) { |
| 223 | ok = mtod(*value, int *); |
| 224 | if (*ok) |
| 225 | nsp->nsp_flags |= mask; |
| 226 | else |
| 227 | nsp->nsp_flags &= ~mask; |
| 228 | } else error = EINVAL; |
| 229 | break; |
| 230 | case SO_DEFAULT_HEADERS: |
| 231 | { |
| 232 | register struct idp *idp |
| 233 | = mtod(*value, struct idp *); |
| 234 | nsp->nsp_dpt = idp->idp_pt; |
| 235 | } |
| 236 | #ifdef NSIP |
| 237 | break; |
| 238 | case SO_NSIP_ROUTE: |
| 239 | error = nsip_route(*value); |
| 240 | break; |
| 241 | #endif NSIP |
| 242 | } |
| 243 | if (value && *value) |
| 244 | m_freem(*value); |
| 245 | break; |
| 246 | } |
| 247 | release: |
| 248 | return(error); |
| 249 | } |
| 250 | |
| 251 | /*ARGSUSED*/ |
| 252 | idp_usrreq(so, req, m, nam, rights) |
| 253 | struct socket *so; |
| 254 | int req; |
| 255 | struct mbuf *m, *nam, *rights; |
| 256 | { |
| 257 | struct nspcb *nsp = sotonspcb(so); |
| 258 | int error = 0; |
| 259 | |
| 260 | if (req == PRU_CONTROL) |
| 261 | return (ns_control(so, (int)m, (caddr_t)nam, |
| 262 | (struct ifnet *)rights)); |
| 263 | if (rights && rights->m_len) { |
| 264 | error = EINVAL; |
| 265 | goto release; |
| 266 | } |
| 267 | if (nsp == NULL && req != PRU_ATTACH) { |
| 268 | error = EINVAL; |
| 269 | goto release; |
| 270 | } |
| 271 | switch (req) { |
| 272 | |
| 273 | case PRU_ATTACH: |
| 274 | if (nsp != NULL) { |
| 275 | error = EINVAL; |
| 276 | break; |
| 277 | } |
| 278 | error = ns_pcballoc(so, &nspcb); |
| 279 | if (error) |
| 280 | break; |
| 281 | error = soreserve(so, 2048, 2048); |
| 282 | if (error) |
| 283 | break; |
| 284 | break; |
| 285 | |
| 286 | case PRU_DETACH: |
| 287 | if (nsp == NULL) { |
| 288 | error = ENOTCONN; |
| 289 | break; |
| 290 | } |
| 291 | ns_pcbdetach(nsp); |
| 292 | break; |
| 293 | |
| 294 | case PRU_BIND: |
| 295 | error = ns_pcbbind(nsp, nam); |
| 296 | break; |
| 297 | |
| 298 | case PRU_LISTEN: |
| 299 | error = EOPNOTSUPP; |
| 300 | break; |
| 301 | |
| 302 | case PRU_CONNECT: |
| 303 | if (!ns_nullhost(nsp->nsp_faddr)) { |
| 304 | error = EISCONN; |
| 305 | break; |
| 306 | } |
| 307 | error = ns_pcbconnect(nsp, nam); |
| 308 | if (error == 0) |
| 309 | soisconnected(so); |
| 310 | break; |
| 311 | |
| 312 | case PRU_CONNECT2: |
| 313 | error = EOPNOTSUPP; |
| 314 | break; |
| 315 | |
| 316 | case PRU_ACCEPT: |
| 317 | error = EOPNOTSUPP; |
| 318 | break; |
| 319 | |
| 320 | case PRU_DISCONNECT: |
| 321 | if (ns_nullhost(nsp->nsp_faddr)) { |
| 322 | error = ENOTCONN; |
| 323 | break; |
| 324 | } |
| 325 | ns_pcbdisconnect(nsp); |
| 326 | soisdisconnected(so); |
| 327 | break; |
| 328 | |
| 329 | case PRU_SHUTDOWN: |
| 330 | socantsendmore(so); |
| 331 | break; |
| 332 | |
| 333 | case PRU_SEND: |
| 334 | { |
| 335 | struct ns_addr laddr; |
| 336 | int s; |
| 337 | |
| 338 | if (nam) { |
| 339 | laddr = nsp->nsp_laddr; |
| 340 | if (!ns_nullhost(nsp->nsp_faddr)) { |
| 341 | error = EISCONN; |
| 342 | break; |
| 343 | } |
| 344 | /* |
| 345 | * Must block input while temporarily connected. |
| 346 | */ |
| 347 | s = splnet(); |
| 348 | error = ns_pcbconnect(nsp, nam); |
| 349 | if (error) { |
| 350 | splx(s); |
| 351 | break; |
| 352 | } |
| 353 | } else { |
| 354 | if (ns_nullhost(nsp->nsp_faddr)) { |
| 355 | error = ENOTCONN; |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | error = idp_output(nsp, m); |
| 360 | m = NULL; |
| 361 | if (nam) { |
| 362 | ns_pcbdisconnect(nsp); |
| 363 | splx(s); |
| 364 | nsp->nsp_laddr.x_host = laddr.x_host; |
| 365 | nsp->nsp_laddr.x_port = laddr.x_port; |
| 366 | } |
| 367 | } |
| 368 | break; |
| 369 | |
| 370 | case PRU_ABORT: |
| 371 | ns_pcbdetach(nsp); |
| 372 | sofree(so); |
| 373 | soisdisconnected(so); |
| 374 | break; |
| 375 | |
| 376 | case PRU_SOCKADDR: |
| 377 | ns_setsockaddr(nsp, nam); |
| 378 | break; |
| 379 | |
| 380 | case PRU_PEERADDR: |
| 381 | ns_setpeeraddr(nsp, nam); |
| 382 | break; |
| 383 | |
| 384 | case PRU_SENSE: |
| 385 | /* |
| 386 | * stat: don't bother with a blocksize. |
| 387 | */ |
| 388 | return (0); |
| 389 | |
| 390 | case PRU_SENDOOB: |
| 391 | case PRU_FASTTIMO: |
| 392 | case PRU_SLOWTIMO: |
| 393 | case PRU_PROTORCV: |
| 394 | case PRU_PROTOSEND: |
| 395 | error = EOPNOTSUPP; |
| 396 | break; |
| 397 | |
| 398 | case PRU_CONTROL: |
| 399 | case PRU_RCVD: |
| 400 | case PRU_RCVOOB: |
| 401 | return (EOPNOTSUPP); /* do not free mbuf's */ |
| 402 | |
| 403 | default: |
| 404 | panic("idp_usrreq"); |
| 405 | } |
| 406 | release: |
| 407 | if (m != NULL) |
| 408 | m_freem(m); |
| 409 | return (error); |
| 410 | } |
| 411 | /*ARGSUSED*/ |
| 412 | idp_raw_usrreq(so, req, m, nam, rights) |
| 413 | struct socket *so; |
| 414 | int req; |
| 415 | struct mbuf *m, *nam, *rights; |
| 416 | { |
| 417 | int error = 0; |
| 418 | struct nspcb *nsp = sotonspcb(so); |
| 419 | extern struct nspcb nsrawpcb; |
| 420 | |
| 421 | switch (req) { |
| 422 | |
| 423 | case PRU_ATTACH: |
| 424 | |
| 425 | if (nsp != NULL) { |
| 426 | error = EINVAL; |
| 427 | break; |
| 428 | } |
| 429 | error = ns_pcballoc(so, &nsrawpcb); |
| 430 | if (error) |
| 431 | break; |
| 432 | error = soreserve(so, 2048, 2048); |
| 433 | if (error) |
| 434 | break; |
| 435 | nsp = sotonspcb(so); |
| 436 | nsp->nsp_faddr.x_host = ns_broadhost; |
| 437 | nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT; |
| 438 | break; |
| 439 | default: |
| 440 | error = idp_usrreq(so, req, m, nam, rights); |
| 441 | } |
| 442 | return(error); |
| 443 | } |
| 444 | |