| 1 | /* |
| 2 | * Copyright (c) 1989 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 the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | * |
| 17 | * @(#)cltp_usrreq.c 7.2 (Berkeley) %G% |
| 18 | */ |
| 19 | |
| 20 | #ifndef CLTPOVAL_SRC /* XXX -- till files gets changed */ |
| 21 | #include "param.h" |
| 22 | #include "user.h" |
| 23 | #include "malloc.h" |
| 24 | #include "mbuf.h" |
| 25 | #include "protosw.h" |
| 26 | #include "socket.h" |
| 27 | #include "socketvar.h" |
| 28 | #include "errno.h" |
| 29 | #include "stat.h" |
| 30 | |
| 31 | #include "../net/if.h" |
| 32 | #include "../net/route.h" |
| 33 | |
| 34 | #include "argo_debug.h" |
| 35 | #include "iso.h" |
| 36 | #include "iso_pcb.h" |
| 37 | #include "iso_var.h" |
| 38 | #include "clnp.h" |
| 39 | #include "cltp_var.h" |
| 40 | #endif |
| 41 | |
| 42 | /* |
| 43 | * CLTP protocol implementation. |
| 44 | * Per ISO 8602, December, 1987. |
| 45 | */ |
| 46 | cltp_init() |
| 47 | { |
| 48 | |
| 49 | cltb.isop_next = cltb.isop_prev = &cltb; |
| 50 | } |
| 51 | |
| 52 | int cltp_cksum = 1; |
| 53 | |
| 54 | |
| 55 | /* ARGUSED */ |
| 56 | cltp_input(m0, srcsa, dstsa, cons_channel, output) |
| 57 | struct mbuf *m0; |
| 58 | struct sockaddr *srcsa, *dstsa; |
| 59 | u_int cons_channel; |
| 60 | int (*output)(); |
| 61 | { |
| 62 | register struct isopcb *isop; |
| 63 | register struct mbuf *m = m0; |
| 64 | register u_char *up = mtod(m, u_char *); |
| 65 | register struct sockaddr_iso *src = (struct sockaddr_iso *)srcsa; |
| 66 | int len, hdrlen = *up + 1, dlen = 0; |
| 67 | u_char *uplim = up + hdrlen; |
| 68 | caddr_t dtsap; |
| 69 | |
| 70 | for (len = 0; m; m = m->m_next) |
| 71 | len += m->m_len; |
| 72 | up += 2; /* skip header */ |
| 73 | while (up < uplim) switch (*up) { /* process options */ |
| 74 | case CLTPOVAL_SRC: |
| 75 | src->siso_tlen = up[1]; |
| 76 | src->siso_len = up[1] + TSEL(src) - (caddr_t)src; |
| 77 | if (src->siso_len < sizeof(*src)) |
| 78 | src->siso_len = sizeof(*src); |
| 79 | else if (src->siso_len > sizeof(*src)) { |
| 80 | MGET(m, M_DONTWAIT, MT_SONAME); |
| 81 | if (m == 0) |
| 82 | goto bad; |
| 83 | m->m_len = src->siso_len; |
| 84 | src = mtod(m, struct sockaddr_iso *); |
| 85 | bcopy((caddr_t)srcsa, (caddr_t)src, srcsa->sa_len); |
| 86 | } |
| 87 | bcopy((caddr_t)up + 2, TSEL(src), up[1]); |
| 88 | up += 2 + src->siso_tlen; |
| 89 | continue; |
| 90 | |
| 91 | case CLTPOVAL_DST: |
| 92 | dtsap = 2 + (caddr_t)up; |
| 93 | dlen = up[1]; |
| 94 | up += 2 + dlen; |
| 95 | continue; |
| 96 | |
| 97 | case CLTPOVAL_CSM: |
| 98 | if (iso_check_csum(m0, len)) { |
| 99 | cltpstat.cltps_badsum++; |
| 100 | goto bad; |
| 101 | } |
| 102 | up += 4; |
| 103 | continue; |
| 104 | |
| 105 | default: |
| 106 | printf("clts: unknown option (%x)\n", up[0]); |
| 107 | cltpstat.cltps_hdrops++; |
| 108 | goto bad; |
| 109 | } |
| 110 | if (dlen == 0 || src->siso_tlen == 0) |
| 111 | goto bad; |
| 112 | for (isop = cltb.isop_next;; isop = isop->isop_next) { |
| 113 | if (isop == &cltb) { |
| 114 | cltpstat.cltps_noport++; |
| 115 | goto bad; |
| 116 | } |
| 117 | if (isop->isop_laddr && |
| 118 | bcmp(TSEL(isop->isop_laddr), dtsap, dlen) == 0) |
| 119 | break; |
| 120 | } |
| 121 | m = m0; |
| 122 | m->m_len -= hdrlen; |
| 123 | m->m_data += hdrlen; |
| 124 | if (sbappendaddr(&isop->isop_socket->so_rcv, (struct sockaddr *)src, |
| 125 | m, (struct mbuf *)0) == 0) |
| 126 | goto bad; |
| 127 | cltpstat.cltps_ipackets++; |
| 128 | sorwakeup(isop->isop_socket); |
| 129 | m0 = 0; |
| 130 | bad: |
| 131 | if (src != (struct sockaddr_iso *)srcsa) |
| 132 | m_freem(dtom(src)); |
| 133 | if (m0) |
| 134 | m_freem(m0); |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Notify a cltp user of an asynchronous error; |
| 140 | * just wake up so that he can collect error status. |
| 141 | */ |
| 142 | cltp_notify(isop) |
| 143 | register struct isopcb *isop; |
| 144 | { |
| 145 | |
| 146 | sorwakeup(isop->isop_socket); |
| 147 | sowwakeup(isop->isop_socket); |
| 148 | } |
| 149 | |
| 150 | cltp_ctlinput(cmd, sa) |
| 151 | int cmd; |
| 152 | struct sockaddr *sa; |
| 153 | { |
| 154 | extern u_char inetctlerrmap[]; |
| 155 | struct sockaddr_iso *siso; |
| 156 | int iso_rtchange(); |
| 157 | |
| 158 | if ((unsigned)cmd > PRC_NCMDS) |
| 159 | return; |
| 160 | if (sa->sa_family != AF_ISO && sa->sa_family != AF_CCITT) |
| 161 | return; |
| 162 | siso = (struct sockaddr_iso *)sa; |
| 163 | if (siso == 0 || siso->siso_nlen == 0) |
| 164 | return; |
| 165 | |
| 166 | switch (cmd) { |
| 167 | case PRC_ROUTEDEAD: |
| 168 | case PRC_REDIRECT_NET: |
| 169 | case PRC_REDIRECT_HOST: |
| 170 | case PRC_REDIRECT_TOSNET: |
| 171 | case PRC_REDIRECT_TOSHOST: |
| 172 | iso_pcbnotify(&cltb, siso, |
| 173 | (int)inetctlerrmap[cmd], iso_rtchange); |
| 174 | break; |
| 175 | |
| 176 | default: |
| 177 | if (inetctlerrmap[cmd] == 0) |
| 178 | return; /* XXX */ |
| 179 | iso_pcbnotify(&cltb, siso, (int)inetctlerrmap[cmd], |
| 180 | cltp_notify); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | cltp_output(isop, m) |
| 185 | register struct isopcb *isop; |
| 186 | register struct mbuf *m; |
| 187 | { |
| 188 | register int len; |
| 189 | register struct sockaddr_iso *siso; |
| 190 | int hdrlen, error = 0, docsum; |
| 191 | register u_char *up; |
| 192 | |
| 193 | if (isop->isop_laddr == 0 || isop->isop_faddr == 0) { |
| 194 | error = ENOTCONN; |
| 195 | goto bad; |
| 196 | } |
| 197 | /* |
| 198 | * Calculate data length and get a mbuf for CLTP header. |
| 199 | */ |
| 200 | hdrlen = 2 + 2 + isop->isop_laddr->siso_tlen |
| 201 | + 2 + isop->isop_faddr->siso_tlen; |
| 202 | if (docsum = /*isop->isop_flags & CLNP_NO_CKSUM*/ cltp_cksum) |
| 203 | hdrlen += 4; |
| 204 | M_PREPEND(m, hdrlen, M_WAIT); |
| 205 | len = m->m_pkthdr.len; |
| 206 | /* |
| 207 | * Fill in mbuf with extended CLTP header |
| 208 | */ |
| 209 | up = mtod(m, u_char *); |
| 210 | up[0] = hdrlen - 1; |
| 211 | up[1] = UD_TPDU_type; |
| 212 | up[2] = CLTPOVAL_SRC; |
| 213 | up[3] = (siso = isop->isop_laddr)->siso_tlen; |
| 214 | up += 4; |
| 215 | bcopy(TSEL(siso), (caddr_t)up, siso->siso_tlen); |
| 216 | up += siso->siso_tlen; |
| 217 | up[0] = CLTPOVAL_DST; |
| 218 | up[1] = (siso = isop->isop_faddr)->siso_tlen; |
| 219 | up += 2; |
| 220 | bcopy(TSEL(siso), (caddr_t)up, siso->siso_tlen); |
| 221 | /* |
| 222 | * Stuff checksum and output datagram. |
| 223 | */ |
| 224 | if (docsum) { |
| 225 | up += siso->siso_tlen; |
| 226 | up[0] = CLTPOVAL_CSM; |
| 227 | up[1] = 2; |
| 228 | iso_gen_csum(m, 2 + up - mtod(m, u_char *), len); |
| 229 | } |
| 230 | cltpstat.cltps_opackets++; |
| 231 | return (tpclnp_output(isop, m, len, !docsum)); |
| 232 | bad: |
| 233 | m_freem(m); |
| 234 | return (error); |
| 235 | } |
| 236 | |
| 237 | #ifndef TP_LOCAL |
| 238 | /* XXXX should go in iso.h maybe? from tp_param.h, in any case */ |
| 239 | #define TP_LOCAL 22 |
| 240 | #define TP_FOREIGN 33 |
| 241 | #endif |
| 242 | |
| 243 | u_long cltp_sendspace = 9216; /* really max datagram size */ |
| 244 | u_long cltp_recvspace = 40 * (1024 + sizeof(struct sockaddr_iso)); |
| 245 | /* 40 1K datagrams */ |
| 246 | |
| 247 | |
| 248 | /*ARGSUSED*/ |
| 249 | cltp_usrreq(so, req, m, nam, rights, control) |
| 250 | struct socket *so; |
| 251 | int req; |
| 252 | struct mbuf *m, *nam, *rights, *control; |
| 253 | { |
| 254 | struct isopcb *isop = sotoisopcb(so); |
| 255 | int s, error = 0; |
| 256 | |
| 257 | if (req == PRU_CONTROL) |
| 258 | return (iso_control(so, (int)m, (caddr_t)nam, |
| 259 | (struct ifnet *)rights)); |
| 260 | if (rights && rights->m_len) { |
| 261 | error = EINVAL; |
| 262 | goto release; |
| 263 | } |
| 264 | if (isop == NULL && req != PRU_ATTACH) { |
| 265 | error = EINVAL; |
| 266 | goto release; |
| 267 | } |
| 268 | switch (req) { |
| 269 | |
| 270 | case PRU_ATTACH: |
| 271 | if (isop != NULL) { |
| 272 | error = EINVAL; |
| 273 | break; |
| 274 | } |
| 275 | error = iso_pcballoc(so, &cltb); |
| 276 | if (error) |
| 277 | break; |
| 278 | error = soreserve(so, cltp_sendspace, cltp_recvspace); |
| 279 | if (error) |
| 280 | break; |
| 281 | break; |
| 282 | |
| 283 | case PRU_DETACH: |
| 284 | iso_pcbdetach(isop); |
| 285 | break; |
| 286 | |
| 287 | case PRU_BIND: |
| 288 | error = iso_pcbbind(isop, nam); |
| 289 | break; |
| 290 | |
| 291 | case PRU_LISTEN: |
| 292 | error = EOPNOTSUPP; |
| 293 | break; |
| 294 | |
| 295 | case PRU_CONNECT: |
| 296 | if (isop->isop_faddr) { |
| 297 | error = EISCONN; |
| 298 | break; |
| 299 | } |
| 300 | error = iso_pcbconnect(isop, nam); |
| 301 | if (error == 0) |
| 302 | soisconnected(so); |
| 303 | break; |
| 304 | |
| 305 | case PRU_CONNECT2: |
| 306 | error = EOPNOTSUPP; |
| 307 | break; |
| 308 | |
| 309 | case PRU_ACCEPT: |
| 310 | error = EOPNOTSUPP; |
| 311 | break; |
| 312 | |
| 313 | case PRU_DISCONNECT: |
| 314 | if (isop->isop_faddr == 0) { |
| 315 | error = ENOTCONN; |
| 316 | break; |
| 317 | } |
| 318 | iso_pcbdisconnect(isop); |
| 319 | so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
| 320 | break; |
| 321 | |
| 322 | case PRU_SHUTDOWN: |
| 323 | socantsendmore(so); |
| 324 | break; |
| 325 | |
| 326 | case PRU_SEND: |
| 327 | if (nam) { |
| 328 | if (isop->isop_faddr) { |
| 329 | error = EISCONN; |
| 330 | break; |
| 331 | } |
| 332 | /* |
| 333 | * Must block input while temporarily connected. |
| 334 | */ |
| 335 | s = splnet(); |
| 336 | error = iso_pcbconnect(isop, nam); |
| 337 | if (error) { |
| 338 | splx(s); |
| 339 | break; |
| 340 | } |
| 341 | } else { |
| 342 | if (isop->isop_faddr == 0) { |
| 343 | error = ENOTCONN; |
| 344 | break; |
| 345 | } |
| 346 | } |
| 347 | error = cltp_output(isop, m); |
| 348 | m = 0; |
| 349 | if (nam) { |
| 350 | iso_pcbdisconnect(isop); |
| 351 | splx(s); |
| 352 | } |
| 353 | break; |
| 354 | |
| 355 | case PRU_ABORT: |
| 356 | soisdisconnected(so); |
| 357 | iso_pcbdetach(isop); |
| 358 | break; |
| 359 | |
| 360 | case PRU_SOCKADDR: |
| 361 | iso_getnetaddr(isop, nam, TP_LOCAL); |
| 362 | break; |
| 363 | |
| 364 | case PRU_PEERADDR: |
| 365 | iso_getnetaddr(isop, nam, TP_FOREIGN); |
| 366 | break; |
| 367 | |
| 368 | case PRU_SENSE: |
| 369 | /* |
| 370 | * stat: don't bother with a blocksize. |
| 371 | */ |
| 372 | return (0); |
| 373 | |
| 374 | case PRU_SENDOOB: |
| 375 | case PRU_FASTTIMO: |
| 376 | case PRU_SLOWTIMO: |
| 377 | case PRU_PROTORCV: |
| 378 | case PRU_PROTOSEND: |
| 379 | error = EOPNOTSUPP; |
| 380 | break; |
| 381 | |
| 382 | case PRU_RCVD: |
| 383 | case PRU_RCVOOB: |
| 384 | return (EOPNOTSUPP); /* do not free mbuf's */ |
| 385 | |
| 386 | default: |
| 387 | panic("cltp_usrreq"); |
| 388 | } |
| 389 | release: |
| 390 | if (m != NULL) |
| 391 | m_freem(m); |
| 392 | return (error); |
| 393 | } |