bsd/netat/ddp_usrreq.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  *      Copyright (c) 1998 Apple Computer, Inc.
  24  */
  25
  26 /*      ddp_usrreq.c
  27  */
  28
  29 #include <sys/errno.h>
  30 #include <sys/types.h>
  31 #include <sys/param.h>
  32 #include <machine/spl.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/proc.h>
  36 #include <sys/filedesc.h>
  37 #include <sys/fcntl.h>
  38 #include <sys/mbuf.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/malloc.h>
  41 #include <sys/socket.h>
  42 #include <sys/socketvar.h>
  43 #include <sys/protosw.h>
  44
  45 #include <net/if.h>
  46
  47 #include <netat/appletalk.h>
  48 #include <netat/at_var.h>
  49 #include <netat/sysglue.h>
  50 #include <netat/ddp.h>
  51 #include <netat/ep.h>
  52 #include <netat/rtmp.h>
  53 #include <netat/zip.h>
  54 #include <netat/at_pcb.h>
  55 #include <netat/routing_tables.h>
  56 #include <netat/nbp.h>
  57
  58 extern int at_control(), at_memzone_init();
  59 extern void  nbp_input(), ep_input(), zip_router_input(),
  60   sip_input(), add_ddp_handler(), init_ddp_handler(),
  61   ddp_start(), ddp_input(), appletalk_hack_start();
  62 extern u_short ddp_checksum();
  63 extern at_ifaddr_t *forUs();
  64 extern struct mbuf *m_dup(struct mbuf *, int);
  65
  66 extern at_ifaddr_t *ifID_home;
  67 extern int xpatcnt;
  68
  69 struct atpcb ddp_head;
  70 u_long ddp_sendspace = 600,     /* *** what should this value be? *** */
  71   ddp_recvspace = 50 * (600 + sizeof(struct sockaddr_at));
  72
  73 int ddp_pru_control(struct socket *so, u_long cmd, caddr_t data,
  74                 struct ifnet *ifp, struct proc *p)
  75 {
  76         return(at_control(so, cmd, data, ifp));
  77 }
  78
  79
  80 int     ddp_pru_attach(struct socket *so, int proto,
  81                    struct proc *p)
  82 {
  83         int s, error = 0;
  84         at_ddp_t *ddp = NULL;
  85         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
  86
  87         s = splnet();
  88         error = at_pcballoc(so, &ddp_head);
  89         splx(s);
  90         if (error)
  91                 return error;
  92         error = soreserve(so, ddp_sendspace, ddp_recvspace);
  93         pcb = (struct atpcb *)((so)->so_pcb);
  94         pcb->pid = current_proc()->p_pid;
  95         pcb->ddptype = (u_char) proto;    /* set in socreate() */
  96         pcb->proto = ATPROTO_DDP;
  97
  98         return error;
  99 }
 100
 101
 102 int  ddp_pru_disconnect(struct socket *so)
 103 {
 104
 105         int s, error = 0;
 106         at_ddp_t *ddp = NULL;
 107         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 108
 109         if (pcb == NULL)
 110                 return (EINVAL);
 111
 112         if ((so->so_state & SS_ISCONNECTED) == 0)
 113                 return ENOTCONN;
 114
 115         soisdisconnected(so);
 116         s = splnet();
 117         at_pcbdetach(pcb);
 118         splx(s);
 119
 120         return error;
 121 }
 122
 123
 124 int  ddp_pru_abort(struct socket *so)
 125 {
 126         int s;
 127         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 128
 129         if (pcb == NULL)
 130                 return (EINVAL);
 131
 132         soisdisconnected(so);
 133         s = splnet();
 134         at_pcbdetach(pcb);
 135         splx(s);
 136
 137         return 0;
 138 }
 139
 140 int  ddp_pru_detach(struct socket *so)
 141 {
 142         int s;
 143         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 144
 145         if (pcb == NULL)
 146                 return (EINVAL);
 147
 148         s = splnet();
 149         at_pcbdetach(pcb);
 150         splx(s);
 151         return 0;
 152 }
 153
 154 int     ddp_pru_shutdown(struct socket *so)
 155 {
 156         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 157
 158         if (pcb == NULL)
 159                 return (EINVAL);
 160
 161         socantsendmore(so);
 162         return 0;
 163 }
 164
 165
 166 int    ddp_pru_bind(struct socket *so, struct sockaddr *nam,
 167                 struct proc *p)
 168 {
 169         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 170
 171         if (pcb == NULL)
 172                 return (EINVAL);
 173
 174         return (at_pcbbind(pcb, nam));
 175 }
 176
 177
 178 int     ddp_pru_send(struct socket *so, int flags, struct mbuf *m,
 179                      struct sockaddr *addr, struct mbuf *control,
 180                      struct proc *p)
 181 {
 182         at_ddp_t *ddp = NULL;
 183         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 184
 185         if (pcb == NULL)
 186                 return (EINVAL);
 187
 188         /*
 189          * Set type to MSG_DATA.  Otherwise looped back packet is not
 190          * recognized by atp_input() and possibly other protocols.
 191          */
 192
 193         MCHTYPE(m, MSG_DATA);
 194
 195         if (!(pcb->ddp_flags & DDPFLG_HDRINCL)) {
 196                 /* prepend a DDP header */
 197                 M_PREPEND(m, DDP_X_HDR_SIZE, M_WAIT);
 198                 ddp = mtod(m, at_ddp_t *);
 199         }
 200
 201         if (so->so_state & SS_ISCONNECTED) {
 202                 if (addr)
 203                         return EISCONN;
 204
 205                 if (ddp) {
 206                         NET_ASSIGN(ddp->dst_net, pcb->raddr.s_net);
 207                         ddp->dst_node = pcb->raddr.s_node;
 208                         ddp->dst_socket = pcb->rport;
 209                 }
 210         } else {
 211                 if (addr == NULL)
 212                         return ENOTCONN;
 213
 214                 if (ddp) {
 215                         struct sockaddr_at *dst =
 216                                 (struct sockaddr_at *) addr;
 217                         NET_ASSIGN(ddp->dst_net, dst->sat_addr.s_net);
 218                         ddp->dst_node = dst->sat_addr.s_node;
 219                         ddp->dst_socket = dst->sat_port;
 220                 }
 221         }
 222         if (ddp) {
 223                 ddp->length = m->m_pkthdr.len;
 224                 UAS_ASSIGN(ddp->checksum,
 225                            (pcb->ddp_flags & DDPFLG_CHKSUM)? 1: 0);
 226                 ddp->type = (pcb->ddptype)? pcb->ddptype: DEFAULT_OT_DDPTYPE;
 227 #ifdef NOT_YET
 228                 NET_ASSIGN(ddp->src_net, pcb->laddr.s_net);
 229                 ddp->src_node = pcb->laddr.s_node;
 230                 ddp->src_socket = pcb->lport;
 231 #endif
 232         } else {
 233                 ddp = mtod(m, at_ddp_t *);
 234         }
 235         if (NET_VALUE(ddp->dst_net) == ATADDR_ANYNET &&
 236             ddp->dst_node == ATADDR_BCASTNODE &&
 237             (pcb->ddp_flags & DDPFLG_SLFSND)) {
 238                 struct mbuf *n;
 239
 240                 if ((n = m_dup(m, M_DONTWAIT))) {
 241                         at_ifaddr_t
 242                           *ifID = ifID_home,
 243                           *ifIDTmp = (at_ifaddr_t *)NULL;
 244
 245                         /* as in ddp_output() loop processing, fill in the
 246                            rest of the header */
 247                         ddp = mtod(n, at_ddp_t *);
 248                         if (MULTIHOME_MODE && (ifIDTmp = forUs(ddp)))
 249                                 ifID = ifIDTmp;
 250                         NET_ASSIGN(ddp->src_net, ifID->ifThisNode.s_net);
 251                         ddp->src_node = ifID->ifThisNode.s_node;
 252                         ddp->src_socket = pcb->lport;
 253                         if (UAS_VALUE(ddp->checksum))
 254                                 UAS_ASSIGN(ddp->checksum, ddp_checksum(m, 4));
 255                         ddp_input(n, ifID);
 256                 }
 257         }
 258         return(ddp_output(&m, pcb->lport, FALSE));
 259 } /* ddp_pru_send */
 260
 261 int   ddp_pru_sockaddr(struct socket *so,
 262                    struct sockaddr **nam)
 263 {
 264         int s;
 265         struct atpcb *pcb;
 266         struct sockaddr_at *sat;
 267
 268         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 269         if (sat == NULL)
 270                 return(ENOMEM);
 271         bzero((caddr_t)sat, sizeof(*sat));
 272
 273         s = splnet();
 274         if ((pcb = sotoatpcb(so)) == NULL) {
 275                 splx(s);
 276                 FREE(sat, M_SONAME);
 277                 return(EINVAL);
 278         }
 279
 280         sat->sat_family = AF_APPLETALK;
 281         sat->sat_len = sizeof(*sat);
 282         sat->sat_port = pcb->lport;
 283         sat->sat_addr = pcb->laddr;
 284         splx(s);
 285
 286         *nam = (struct sockaddr *)sat;
 287         return(0);
 288 }
 289
 290
 291 int  ddp_pru_peeraddr(struct socket *so,
 292                   struct sockaddr **nam)
 293 {
 294         int s;
 295         struct atpcb *pcb;
 296         struct sockaddr_at *sat;
 297
 298         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 299         if (sat == NULL)
 300                 return (ENOMEM);
 301         bzero((caddr_t)sat, sizeof(*sat));
 302
 303         s = splnet();
 304         if ((pcb = sotoatpcb(so)) == NULL) {
 305                 splx(s);
 306                 FREE(sat, M_SONAME);
 307                 return(EINVAL);
 308         }
 309
 310         sat->sat_family = AF_APPLETALK;
 311         sat->sat_len = sizeof(*sat);
 312         sat->sat_port = pcb->rport;
 313         sat->sat_addr = pcb->raddr;
 314         splx(s);
 315
 316         *nam = (struct sockaddr *)sat;
 317         return(0);
 318 }
 319
 320
 321 int    ddp_pru_connect(struct socket *so, struct sockaddr *nam,
 322                    struct proc *p)
 323 {
 324         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 325         struct sockaddr_at *faddr = (struct sockaddr_at *) nam;
 326
 327         if (pcb != NULL)
 328                 return (EINVAL);
 329
 330         if (xpatcnt == 0)
 331                 return (EADDRNOTAVAIL);
 332
 333         if (faddr->sat_family != AF_APPLETALK)
 334                 return (EAFNOSUPPORT);
 335
 336         pcb->raddr = faddr->sat_addr;
 337         soisconnected(so);
 338         return 0;
 339 }
 340
 341
 342
 343 /*
 344  * One-time AppleTalk initialization
 345  */
 346 void ddp_init()
 347 {
 348         at_memzone_init();
 349         ddp_head.atpcb_next = ddp_head.atpcb_prev = &ddp_head;
 350         init_ddp_handler();
 351
 352     /* Initialize protocols implemented in the kernel */
 353         add_ddp_handler(EP_SOCKET, ep_input);
 354         add_ddp_handler(ZIP_SOCKET, zip_router_input);
 355         add_ddp_handler(NBP_SOCKET, nbp_input);
 356         add_ddp_handler(DDP_SOCKET_1st_DYNAMIC, sip_input);
 357
 358         ddp_start();
 359
 360         appletalk_hack_start();
 361 } /* ddp_init */
 362