bsd/netat/ddp_usrreq.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  *      Copyright (c) 1998 Apple Computer, Inc.
  27  */
  28
  29 /*      ddp_usrreq.c
  30  */
  31
  32 #include <sys/errno.h>
  33 #include <sys/types.h>
  34 #include <sys/param.h>
  35 #include <machine/spl.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/proc.h>
  39 #include <sys/filedesc.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/malloc.h>
  44 #include <sys/socket.h>
  45 #include <sys/socketvar.h>
  46 #include <sys/protosw.h>
  47
  48 #include <net/if.h>
  49
  50 #include <netat/appletalk.h>
  51 #include <netat/at_var.h>
  52 #include <netat/sysglue.h>
  53 #include <netat/ddp.h>
  54 #include <netat/ep.h>
  55 #include <netat/rtmp.h>
  56 #include <netat/zip.h>
  57 #include <netat/at_pcb.h>
  58 #include <netat/routing_tables.h>
  59 #include <netat/nbp.h>
  60
  61 extern int at_control(), at_memzone_init();
  62 extern void  nbp_input(), ep_input(), zip_router_input(),
  63   sip_input(), add_ddp_handler(), init_ddp_handler(),
  64   ddp_start(), ddp_input(), appletalk_hack_start();
  65 extern u_short ddp_checksum();
  66 extern at_ifaddr_t *forUs();
  67 extern struct mbuf *m_dup(struct mbuf *, int);
  68
  69 extern at_ifaddr_t *ifID_home;
  70 extern int xpatcnt;
  71
  72 struct atpcb ddp_head;
  73 u_long ddp_sendspace = 600,     /* *** what should this value be? *** */
  74   ddp_recvspace = 50 * (600 + sizeof(struct sockaddr_at));
  75
  76 int ddp_pru_control(struct socket *so, u_long cmd, caddr_t data,
  77                 struct ifnet *ifp, struct proc *p)
  78 {
  79         return(at_control(so, cmd, data, ifp));
  80 }
  81
  82
  83 int     ddp_pru_attach(struct socket *so, int proto,
  84                    struct proc *p)
  85 {
  86         int s, error = 0;
  87         at_ddp_t *ddp = NULL;
  88         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
  89
  90         s = splnet();
  91         error = at_pcballoc(so, &ddp_head);
  92         splx(s);
  93         if (error)
  94                 return error;
  95         error = soreserve(so, ddp_sendspace, ddp_recvspace);
  96         pcb = (struct atpcb *)((so)->so_pcb);
  97         pcb->pid = current_proc()->p_pid;
  98         pcb->ddptype = (u_char) proto;    /* set in socreate() */
  99         pcb->proto = ATPROTO_DDP;
 100
 101         return error;
 102 }
 103
 104
 105 int  ddp_pru_disconnect(struct socket *so)
 106 {
 107
 108         int s, error = 0;
 109         at_ddp_t *ddp = NULL;
 110         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 111
 112         if (pcb == NULL)
 113                 return (EINVAL);
 114
 115         if ((so->so_state & SS_ISCONNECTED) == 0)
 116                 return ENOTCONN;
 117
 118         soisdisconnected(so);
 119         s = splnet();
 120         at_pcbdetach(pcb);
 121         splx(s);
 122
 123         return error;
 124 }
 125
 126
 127 int  ddp_pru_abort(struct socket *so)
 128 {
 129         int s;
 130         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 131
 132         if (pcb == NULL)
 133                 return (EINVAL);
 134
 135         soisdisconnected(so);
 136         s = splnet();
 137         at_pcbdetach(pcb);
 138         splx(s);
 139
 140         return 0;
 141 }
 142
 143 int  ddp_pru_detach(struct socket *so)
 144 {
 145         int s;
 146         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 147
 148         if (pcb == NULL)
 149                 return (EINVAL);
 150
 151         s = splnet();
 152         at_pcbdetach(pcb);
 153         splx(s);
 154         return 0;
 155 }
 156
 157 int     ddp_pru_shutdown(struct socket *so)
 158 {
 159         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 160
 161         if (pcb == NULL)
 162                 return (EINVAL);
 163
 164         socantsendmore(so);
 165         return 0;
 166 }
 167
 168
 169 int    ddp_pru_bind(struct socket *so, struct sockaddr *nam,
 170                 struct proc *p)
 171 {
 172         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 173
 174         if (pcb == NULL)
 175                 return (EINVAL);
 176
 177         return (at_pcbbind(pcb, nam));
 178 }
 179
 180
 181 int     ddp_pru_send(struct socket *so, int flags, struct mbuf *m,
 182                      struct sockaddr *addr, struct mbuf *control,
 183                      struct proc *p)
 184 {
 185         at_ddp_t *ddp = NULL;
 186         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 187
 188         if (pcb == NULL)
 189                 return (EINVAL);
 190
 191         /*
 192          * Set type to MSG_DATA.  Otherwise looped back packet is not
 193          * recognized by atp_input() and possibly other protocols.
 194          */
 195
 196         MCHTYPE(m, MSG_DATA);
 197
 198         if (!(pcb->ddp_flags & DDPFLG_HDRINCL)) {
 199                 /* prepend a DDP header */
 200                 M_PREPEND(m, DDP_X_HDR_SIZE, M_WAIT);
 201                 ddp = mtod(m, at_ddp_t *);
 202         }
 203
 204         if (so->so_state & SS_ISCONNECTED) {
 205                 if (addr)
 206                         return EISCONN;
 207
 208                 if (ddp) {
 209                         NET_ASSIGN(ddp->dst_net, pcb->raddr.s_net);
 210                         ddp->dst_node = pcb->raddr.s_node;
 211                         ddp->dst_socket = pcb->rport;
 212                 }
 213         } else {
 214                 if (addr == NULL)
 215                         return ENOTCONN;
 216
 217                 if (ddp) {
 218                         struct sockaddr_at *dst =
 219                                 (struct sockaddr_at *) addr;
 220                         NET_ASSIGN(ddp->dst_net, dst->sat_addr.s_net);
 221                         ddp->dst_node = dst->sat_addr.s_node;
 222                         ddp->dst_socket = dst->sat_port;
 223                 }
 224         }
 225         if (ddp) {
 226                 ddp->length = m->m_pkthdr.len;
 227                 UAS_ASSIGN(ddp->checksum,
 228                            (pcb->ddp_flags & DDPFLG_CHKSUM)? 1: 0);
 229                 ddp->type = (pcb->ddptype)? pcb->ddptype: DEFAULT_OT_DDPTYPE;
 230 #ifdef NOT_YET
 231                 NET_ASSIGN(ddp->src_net, pcb->laddr.s_net);
 232                 ddp->src_node = pcb->laddr.s_node;
 233                 ddp->src_socket = pcb->lport;
 234 #endif
 235         } else {
 236                 ddp = mtod(m, at_ddp_t *);
 237         }
 238         if (NET_VALUE(ddp->dst_net) == ATADDR_ANYNET &&
 239             ddp->dst_node == ATADDR_BCASTNODE &&
 240             (pcb->ddp_flags & DDPFLG_SLFSND)) {
 241                 struct mbuf *n;
 242
 243                 if ((n = m_dup(m, M_DONTWAIT))) {
 244                         at_ifaddr_t
 245                           *ifID = ifID_home,
 246                           *ifIDTmp = (at_ifaddr_t *)NULL;
 247
 248                         /* as in ddp_output() loop processing, fill in the
 249                            rest of the header */
 250                         ddp = mtod(n, at_ddp_t *);
 251                         if (MULTIHOME_MODE && (ifIDTmp = forUs(ddp)))
 252                                 ifID = ifIDTmp;
 253                         NET_ASSIGN(ddp->src_net, ifID->ifThisNode.s_net);
 254                         ddp->src_node = ifID->ifThisNode.s_node;
 255                         ddp->src_socket = pcb->lport;
 256                         if (UAS_VALUE(ddp->checksum))
 257                                 UAS_ASSIGN(ddp->checksum, ddp_checksum(m, 4));
 258                         ddp_input(n, ifID);
 259                 }
 260         }
 261         return(ddp_output(&m, pcb->lport, FALSE));
 262 } /* ddp_pru_send */
 263
 264 int   ddp_pru_sockaddr(struct socket *so,
 265                    struct sockaddr **nam)
 266 {
 267         int s;
 268         struct atpcb *pcb;
 269         struct sockaddr_at *sat;
 270
 271         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 272         if (sat == NULL)
 273                 return(ENOMEM);
 274         bzero((caddr_t)sat, sizeof(*sat));
 275
 276         s = splnet();
 277         if ((pcb = sotoatpcb(so)) == NULL) {
 278                 splx(s);
 279                 FREE(sat, M_SONAME);
 280                 return(EINVAL);
 281         }
 282
 283         sat->sat_family = AF_APPLETALK;
 284         sat->sat_len = sizeof(*sat);
 285         sat->sat_port = pcb->lport;
 286         sat->sat_addr = pcb->laddr;
 287         splx(s);
 288
 289         *nam = (struct sockaddr *)sat;
 290         return(0);
 291 }
 292
 293
 294 int  ddp_pru_peeraddr(struct socket *so,
 295                   struct sockaddr **nam)
 296 {
 297         int s;
 298         struct atpcb *pcb;
 299         struct sockaddr_at *sat;
 300
 301         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 302         if (sat == NULL)
 303                 return (ENOMEM);
 304         bzero((caddr_t)sat, sizeof(*sat));
 305
 306         s = splnet();
 307         if ((pcb = sotoatpcb(so)) == NULL) {
 308                 splx(s);
 309                 FREE(sat, M_SONAME);
 310                 return(EINVAL);
 311         }
 312
 313         sat->sat_family = AF_APPLETALK;
 314         sat->sat_len = sizeof(*sat);
 315         sat->sat_port = pcb->rport;
 316         sat->sat_addr = pcb->raddr;
 317         splx(s);
 318
 319         *nam = (struct sockaddr *)sat;
 320         return(0);
 321 }
 322
 323
 324 int    ddp_pru_connect(struct socket *so, struct sockaddr *nam,
 325                    struct proc *p)
 326 {
 327         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 328         struct sockaddr_at *faddr = (struct sockaddr_at *) nam;
 329
 330         if (pcb != NULL)
 331                 return (EINVAL);
 332
 333         if (xpatcnt == 0)
 334                 return (EADDRNOTAVAIL);
 335
 336         if (faddr->sat_family != AF_APPLETALK)
 337                 return (EAFNOSUPPORT);
 338
 339         pcb->raddr = faddr->sat_addr;
 340         soisconnected(so);
 341         return 0;
 342 }
 343
 344
 345
 346 /*
 347  * One-time AppleTalk initialization
 348  */
 349 void ddp_init()
 350 {
 351         at_memzone_init();
 352         ddp_head.atpcb_next = ddp_head.atpcb_prev = &ddp_head;
 353         init_ddp_handler();
 354
 355     /* Initialize protocols implemented in the kernel */
 356         add_ddp_handler(EP_SOCKET, ep_input);
 357         add_ddp_handler(ZIP_SOCKET, zip_router_input);
 358         add_ddp_handler(NBP_SOCKET, nbp_input);
 359         add_ddp_handler(DDP_SOCKET_1st_DYNAMIC, sip_input);
 360
 361         ddp_start();
 362
 363         appletalk_hack_start();
 364 } /* ddp_init */
 365