bsd/netat/ddp_usrreq.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  *      Copyright (c) 1998 Apple Computer, Inc.
  30  */
  31
  32 /*      ddp_usrreq.c
  33  */
  34
  35 #include <sys/errno.h>
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38 #include <machine/spl.h>
  39 #include <sys/systm.h>
  40 #include <sys/kernel.h>
  41 #include <sys/proc.h>
  42 #include <sys/filedesc.h>
  43 #include <sys/fcntl.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/malloc.h>
  47 #include <sys/socket.h>
  48 #include <sys/socketvar.h>
  49 #include <sys/protosw.h>
  50
  51 #include <net/if.h>
  52
  53 #include <netat/sysglue.h>
  54 #include <netat/appletalk.h>
  55 #include <netat/at_pcb.h>
  56 #include <netat/at_var.h>
  57 #include <netat/ddp.h>
  58 #include <netat/ep.h>
  59 #include <netat/rtmp.h>
  60 #include <netat/zip.h>
  61 #include <netat/routing_tables.h>
  62 #include <netat/nbp.h>
  63
  64
  65 extern at_ifaddr_t *ifID_home;
  66 extern int xpatcnt;
  67
  68 struct atpcb ddp_head;
  69 u_long ddp_sendspace = 600,     /* *** what should this value be? *** */
  70   ddp_recvspace = 50 * (600 + sizeof(struct sockaddr_at));
  71
  72 int ddp_pru_control(struct socket *so, u_long cmd, caddr_t data,
  73                 struct ifnet *ifp, __unused struct proc *p)
  74 {
  75         return(at_control(so, cmd, data, ifp));
  76 }
  77
  78
  79 int     ddp_pru_attach(struct socket *so, int proto,
  80                    __unused struct proc *p)
  81 {
  82         int error = 0;
  83         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
  84
  85         error = soreserve(so, ddp_sendspace, ddp_recvspace);
  86         if (error != 0)
  87                 return error;
  88
  89         error = at_pcballoc(so, &ddp_head);
  90         if (error)
  91                 return error;
  92         pcb = (struct atpcb *)((so)->so_pcb);
  93         pcb->pid = proc_selfpid();
  94         pcb->ddptype = (u_char) proto;    /* set in socreate() */
  95         pcb->proto = ATPROTO_DDP;
  96
  97         return error;
  98 }
  99
 100
 101 int  ddp_pru_disconnect(struct socket *so)
 102 {
 103
 104         int error = 0;
 105         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 106
 107         if (pcb == NULL)
 108                 return (EINVAL);
 109
 110         if ((so->so_state & SS_ISCONNECTED) == 0)
 111                 return ENOTCONN;
 112
 113         soisdisconnected(so);
 114         at_pcbdetach(pcb);
 115
 116         return error;
 117 }
 118
 119
 120 int  ddp_pru_abort(struct socket *so)
 121 {
 122         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 123
 124         if (pcb == NULL)
 125                 return (EINVAL);
 126
 127         soisdisconnected(so);
 128         at_pcbdetach(pcb);
 129
 130         return 0;
 131 }
 132
 133 int  ddp_pru_detach(struct socket *so)
 134 {
 135         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 136
 137         if (pcb == NULL)
 138                 return (EINVAL);
 139
 140         at_pcbdetach(pcb);
 141         return 0;
 142 }
 143
 144 int     ddp_pru_shutdown(struct socket *so)
 145 {
 146         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 147
 148         if (pcb == NULL)
 149                 return (EINVAL);
 150
 151         socantsendmore(so);
 152         return 0;
 153 }
 154
 155
 156 int    ddp_pru_bind(struct socket *so, struct sockaddr *nam,
 157                 __unused struct proc *p)
 158 {
 159         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 160
 161         if (pcb == NULL)
 162                 return (EINVAL);
 163
 164         return (at_pcbbind(pcb, nam));
 165 }
 166
 167
 168 int     ddp_pru_send(struct socket *so, __unused int flags, struct mbuf *m,
 169                      struct sockaddr *addr, __unused struct mbuf *control,
 170                      __unused struct proc *p)
 171 {
 172         at_ddp_t *ddp = NULL;
 173         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 174
 175         if (pcb == NULL)
 176                 return (EINVAL);
 177
 178         /*
 179          * Set type to MSG_DATA.  Otherwise looped back packet is not
 180          * recognized by atp_input() and possibly other protocols.
 181          */
 182
 183         MCHTYPE(m, MSG_DATA);
 184
 185         if (!(pcb->ddp_flags & DDPFLG_HDRINCL)) {
 186                 /* prepend a DDP header */
 187                 M_PREPEND(m, DDP_X_HDR_SIZE, M_WAIT);
 188                 ddp = mtod(m, at_ddp_t *);
 189         }
 190
 191         if (so->so_state & SS_ISCONNECTED) {
 192                 if (addr)
 193                         return EISCONN;
 194
 195                 if (ddp) {
 196                         NET_ASSIGN(ddp->dst_net, pcb->raddr.s_net);
 197                         ddp->dst_node = pcb->raddr.s_node;
 198                         ddp->dst_socket = pcb->rport;
 199                 }
 200         } else {
 201                 if (addr == NULL)
 202                         return ENOTCONN;
 203
 204                 if (ddp) {
 205                         struct sockaddr_at *dst =
 206                                 (struct sockaddr_at *) addr;
 207                         NET_ASSIGN(ddp->dst_net, dst->sat_addr.s_net);
 208                         ddp->dst_node = dst->sat_addr.s_node;
 209                         ddp->dst_socket = dst->sat_port;
 210                 }
 211         }
 212         if (ddp) {
 213                 DDPLEN_ASSIGN(ddp, m->m_pkthdr.len);
 214                 UAS_ASSIGN_HTON(ddp->checksum,
 215                            (pcb->ddp_flags & DDPFLG_CHKSUM)? 1: 0);
 216                 ddp->type = (pcb->ddptype)? pcb->ddptype: DEFAULT_OT_DDPTYPE;
 217 #ifdef NOT_YET
 218                 NET_ASSIGN(ddp->src_net, pcb->laddr.s_net);
 219                 ddp->src_node = pcb->laddr.s_node;
 220                 ddp->src_socket = pcb->lport;
 221 #endif
 222         } else {
 223                 ddp = mtod(m, at_ddp_t *);
 224         }
 225         if (NET_VALUE(ddp->dst_net) == ATADDR_ANYNET &&
 226             ddp->dst_node == ATADDR_BCASTNODE &&
 227             (pcb->ddp_flags & DDPFLG_SLFSND)) {
 228                 struct mbuf *n;
 229
 230                 if ((n = m_dup(m, M_DONTWAIT))) {
 231                         at_ifaddr_t
 232                           *ifID = ifID_home,
 233                           *ifIDTmp = (at_ifaddr_t *)NULL;
 234
 235                         /* as in ddp_output() loop processing, fill in the
 236                            rest of the header */
 237                         ddp = mtod(n, at_ddp_t *);
 238                         if (MULTIHOME_MODE && (ifIDTmp = forUs(ddp)))
 239                                 ifID = ifIDTmp;
 240                         NET_ASSIGN(ddp->src_net, ifID->ifThisNode.s_net);
 241                         ddp->src_node = ifID->ifThisNode.s_node;
 242                         ddp->src_socket = pcb->lport;
 243                         if (UAS_VALUE_NTOH(ddp->checksum))
 244                                 UAS_ASSIGN_HTON(ddp->checksum, ddp_checksum(m, 4));
 245                         ddp_input(n, ifID);
 246                 }
 247         }
 248         return(ddp_output(&m, pcb->lport, FALSE));
 249 } /* ddp_pru_send */
 250
 251 int   ddp_pru_sockaddr(struct socket *so,
 252                    struct sockaddr **nam)
 253 {
 254         struct atpcb *pcb;
 255         struct sockaddr_at *sat;
 256
 257         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 258         if (sat == NULL)
 259                 return(ENOMEM);
 260         bzero((caddr_t)sat, sizeof(*sat));
 261
 262         if ((pcb = sotoatpcb(so)) == NULL) {
 263                 FREE(sat, M_SONAME);
 264                 return(EINVAL);
 265         }
 266
 267         sat->sat_family = AF_APPLETALK;
 268         sat->sat_len = sizeof(*sat);
 269         sat->sat_port = pcb->lport;
 270         sat->sat_addr = pcb->laddr;
 271
 272         *nam = (struct sockaddr *)sat;
 273         return(0);
 274 }
 275
 276
 277 int  ddp_pru_peeraddr(struct socket *so,
 278                   struct sockaddr **nam)
 279 {
 280         struct atpcb *pcb;
 281         struct sockaddr_at *sat;
 282
 283         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 284         if (sat == NULL)
 285                 return (ENOMEM);
 286         bzero((caddr_t)sat, sizeof(*sat));
 287
 288         if ((pcb = sotoatpcb(so)) == NULL) {
 289                 FREE(sat, M_SONAME);
 290                 return(EINVAL);
 291         }
 292
 293         sat->sat_family = AF_APPLETALK;
 294         sat->sat_len = sizeof(*sat);
 295         sat->sat_port = pcb->rport;
 296         sat->sat_addr = pcb->raddr;
 297
 298         *nam = (struct sockaddr *)sat;
 299         return(0);
 300 }
 301
 302
 303 int ddp_pru_connect(struct socket *so, struct sockaddr *nam,
 304                    __unused struct proc *p)
 305 {
 306         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 307         struct sockaddr_at *faddr = (struct sockaddr_at *) nam;
 308
 309         if (pcb != NULL)
 310                 return (EINVAL);
 311
 312         if (xpatcnt == 0)
 313                 return (EADDRNOTAVAIL);
 314
 315         if (faddr->sat_family != AF_APPLETALK)
 316                 return (EAFNOSUPPORT);
 317
 318         pcb->raddr = faddr->sat_addr;
 319         soisconnected(so);
 320         return 0;
 321 }
 322
 323
 324 /*
 325  * One-time AppleTalk initialization
 326  */
 327 void ddp_init()
 328 {
 329         at_memzone_init();
 330         ddp_head.atpcb_next = ddp_head.atpcb_prev = &ddp_head;
 331         init_ddp_handler();
 332
 333     /* Initialize protocols implemented in the kernel */
 334         add_ddp_handler(EP_SOCKET, ep_input);
 335         add_ddp_handler(ZIP_SOCKET, zip_router_input);
 336         add_ddp_handler(NBP_SOCKET, nbp_input);
 337         add_ddp_handler(DDP_SOCKET_1st_DYNAMIC, sip_input);
 338
 339         ddp_start();
 340
 341         appletalk_hack_start();
 342 } /* ddp_init */