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 error = 0;
  84         at_ddp_t *ddp = NULL;
  85         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
  86
  87         error = soreserve(so, ddp_sendspace, ddp_recvspace);
  88         if (error != 0)
  89                 return error;
  90
  91         error = at_pcballoc(so, &ddp_head);
  92         if (error)
  93                 return error;
  94         pcb = (struct atpcb *)((so)->so_pcb);
  95         pcb->pid = proc_selfpid();
  96         pcb->ddptype = (u_char) proto;    /* set in socreate() */
  97         pcb->proto = ATPROTO_DDP;
  98
  99         return error;
 100 }
 101
 102
 103 int  ddp_pru_disconnect(struct socket *so)
 104 {
 105
 106         int error = 0;
 107         at_ddp_t *ddp = NULL;
 108         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 109
 110         if (pcb == NULL)
 111                 return (EINVAL);
 112
 113         if ((so->so_state & SS_ISCONNECTED) == 0)
 114                 return ENOTCONN;
 115
 116         soisdisconnected(so);
 117         at_pcbdetach(pcb);
 118
 119         return error;
 120 }
 121
 122
 123 int  ddp_pru_abort(struct socket *so)
 124 {
 125         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 126
 127         if (pcb == NULL)
 128                 return (EINVAL);
 129
 130         soisdisconnected(so);
 131         at_pcbdetach(pcb);
 132
 133         return 0;
 134 }
 135
 136 int  ddp_pru_detach(struct socket *so)
 137 {
 138         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 139
 140         if (pcb == NULL)
 141                 return (EINVAL);
 142
 143         at_pcbdetach(pcb);
 144         return 0;
 145 }
 146
 147 int     ddp_pru_shutdown(struct socket *so)
 148 {
 149         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 150
 151         if (pcb == NULL)
 152                 return (EINVAL);
 153
 154         socantsendmore(so);
 155         return 0;
 156 }
 157
 158
 159 int    ddp_pru_bind(struct socket *so, struct sockaddr *nam,
 160                 struct proc *p)
 161 {
 162         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 163
 164         if (pcb == NULL)
 165                 return (EINVAL);
 166
 167         return (at_pcbbind(pcb, nam));
 168 }
 169
 170
 171 int     ddp_pru_send(struct socket *so, int flags, struct mbuf *m,
 172                      struct sockaddr *addr, struct mbuf *control,
 173                      struct proc *p)
 174 {
 175         at_ddp_t *ddp = NULL;
 176         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 177
 178         if (pcb == NULL)
 179                 return (EINVAL);
 180
 181         /*
 182          * Set type to MSG_DATA.  Otherwise looped back packet is not
 183          * recognized by atp_input() and possibly other protocols.
 184          */
 185
 186         MCHTYPE(m, MSG_DATA);
 187
 188         if (!(pcb->ddp_flags & DDPFLG_HDRINCL)) {
 189                 /* prepend a DDP header */
 190                 M_PREPEND(m, DDP_X_HDR_SIZE, M_WAIT);
 191                 ddp = mtod(m, at_ddp_t *);
 192         }
 193
 194         if (so->so_state & SS_ISCONNECTED) {
 195                 if (addr)
 196                         return EISCONN;
 197
 198                 if (ddp) {
 199                         NET_ASSIGN(ddp->dst_net, pcb->raddr.s_net);
 200                         ddp->dst_node = pcb->raddr.s_node;
 201                         ddp->dst_socket = pcb->rport;
 202                 }
 203         } else {
 204                 if (addr == NULL)
 205                         return ENOTCONN;
 206
 207                 if (ddp) {
 208                         struct sockaddr_at *dst =
 209                                 (struct sockaddr_at *) addr;
 210                         NET_ASSIGN(ddp->dst_net, dst->sat_addr.s_net);
 211                         ddp->dst_node = dst->sat_addr.s_node;
 212                         ddp->dst_socket = dst->sat_port;
 213                 }
 214         }
 215         if (ddp) {
 216                 DDPLEN_ASSIGN(ddp, m->m_pkthdr.len);
 217                 UAS_ASSIGN_HTON(ddp->checksum,
 218                            (pcb->ddp_flags & DDPFLG_CHKSUM)? 1: 0);
 219                 ddp->type = (pcb->ddptype)? pcb->ddptype: DEFAULT_OT_DDPTYPE;
 220 #ifdef NOT_YET
 221                 NET_ASSIGN(ddp->src_net, pcb->laddr.s_net);
 222                 ddp->src_node = pcb->laddr.s_node;
 223                 ddp->src_socket = pcb->lport;
 224 #endif
 225         } else {
 226                 ddp = mtod(m, at_ddp_t *);
 227         }
 228         if (NET_VALUE(ddp->dst_net) == ATADDR_ANYNET &&
 229             ddp->dst_node == ATADDR_BCASTNODE &&
 230             (pcb->ddp_flags & DDPFLG_SLFSND)) {
 231                 struct mbuf *n;
 232
 233                 if ((n = m_dup(m, M_DONTWAIT))) {
 234                         at_ifaddr_t
 235                           *ifID = ifID_home,
 236                           *ifIDTmp = (at_ifaddr_t *)NULL;
 237
 238                         /* as in ddp_output() loop processing, fill in the
 239                            rest of the header */
 240                         ddp = mtod(n, at_ddp_t *);
 241                         if (MULTIHOME_MODE && (ifIDTmp = forUs(ddp)))
 242                                 ifID = ifIDTmp;
 243                         NET_ASSIGN(ddp->src_net, ifID->ifThisNode.s_net);
 244                         ddp->src_node = ifID->ifThisNode.s_node;
 245                         ddp->src_socket = pcb->lport;
 246                         if (UAS_VALUE_NTOH(ddp->checksum))
 247                                 UAS_ASSIGN_HTON(ddp->checksum, ddp_checksum(m, 4));
 248                         ddp_input(n, ifID);
 249                 }
 250         }
 251         return(ddp_output(&m, pcb->lport, FALSE));
 252 } /* ddp_pru_send */
 253
 254 int   ddp_pru_sockaddr(struct socket *so,
 255                    struct sockaddr **nam)
 256 {
 257         struct atpcb *pcb;
 258         struct sockaddr_at *sat;
 259
 260         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 261         if (sat == NULL)
 262                 return(ENOMEM);
 263         bzero((caddr_t)sat, sizeof(*sat));
 264
 265         if ((pcb = sotoatpcb(so)) == NULL) {
 266                 FREE(sat, M_SONAME);
 267                 return(EINVAL);
 268         }
 269
 270         sat->sat_family = AF_APPLETALK;
 271         sat->sat_len = sizeof(*sat);
 272         sat->sat_port = pcb->lport;
 273         sat->sat_addr = pcb->laddr;
 274
 275         *nam = (struct sockaddr *)sat;
 276         return(0);
 277 }
 278
 279
 280 int  ddp_pru_peeraddr(struct socket *so,
 281                   struct sockaddr **nam)
 282 {
 283         struct atpcb *pcb;
 284         struct sockaddr_at *sat;
 285
 286         MALLOC(sat, struct sockaddr_at *, sizeof *sat, M_SONAME, M_WAITOK);
 287         if (sat == NULL)
 288                 return (ENOMEM);
 289         bzero((caddr_t)sat, sizeof(*sat));
 290
 291         if ((pcb = sotoatpcb(so)) == NULL) {
 292                 FREE(sat, M_SONAME);
 293                 return(EINVAL);
 294         }
 295
 296         sat->sat_family = AF_APPLETALK;
 297         sat->sat_len = sizeof(*sat);
 298         sat->sat_port = pcb->rport;
 299         sat->sat_addr = pcb->raddr;
 300
 301         *nam = (struct sockaddr *)sat;
 302         return(0);
 303 }
 304
 305
 306 int    ddp_pru_connect(struct socket *so, struct sockaddr *nam,
 307                    struct proc *p)
 308 {
 309         struct atpcb *pcb = (struct atpcb *)((so)->so_pcb);
 310         struct sockaddr_at *faddr = (struct sockaddr_at *) nam;
 311
 312         if (pcb != NULL)
 313                 return (EINVAL);
 314
 315         if (xpatcnt == 0)
 316                 return (EADDRNOTAVAIL);
 317
 318         if (faddr->sat_family != AF_APPLETALK)
 319                 return (EAFNOSUPPORT);
 320
 321         pcb->raddr = faddr->sat_addr;
 322         soisconnected(so);
 323         return 0;
 324 }
 325
 326
 327
 328 /*
 329  * One-time AppleTalk initialization
 330  */
 331 void ddp_init()
 332 {
 333         at_memzone_init();
 334         ddp_head.atpcb_next = ddp_head.atpcb_prev = &ddp_head;
 335         init_ddp_handler();
 336
 337     /* Initialize protocols implemented in the kernel */
 338         add_ddp_handler(EP_SOCKET, ep_input);
 339         add_ddp_handler(ZIP_SOCKET, zip_router_input);
 340         add_ddp_handler(NBP_SOCKET, nbp_input);
 341         add_ddp_handler(DDP_SOCKET_1st_DYNAMIC, sip_input);
 342
 343         ddp_start();
 344
 345         appletalk_hack_start();
 346 } /* ddp_init */
 347