diff options
Diffstat (limited to 'mdk-stage1/ppp/modules/ppp_comp.c')
| -rw-r--r-- | mdk-stage1/ppp/modules/ppp_comp.c | 1126 |
1 files changed, 0 insertions, 1126 deletions
diff --git a/mdk-stage1/ppp/modules/ppp_comp.c b/mdk-stage1/ppp/modules/ppp_comp.c deleted file mode 100644 index f6eef5ab1..000000000 --- a/mdk-stage1/ppp/modules/ppp_comp.c +++ /dev/null @@ -1,1126 +0,0 @@ -/* - * ppp_comp.c - STREAMS module for kernel-level compression and CCP support. - * - * Copyright (c) 1994 The Australian National University. - * All rights reserved. - * - * Permission to use, copy, modify, and distribute this software and its - * documentation is hereby granted, provided that the above copyright - * notice appears in all copies. This software is provided without any - * warranty, express or implied. The Australian National University - * makes no representations about the suitability of this software for - * any purpose. - * - * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY - * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES - * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF - * THE AUSTRALIAN NATIONAL UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY - * OF SUCH DAMAGE. - * - * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS - * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO - * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, - * OR MODIFICATIONS. - * - * $Id$ - */ - -/* - * This file is used under SVR4, Solaris 2, SunOS 4, and Digital UNIX. - */ - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/errno.h> -#include <sys/stream.h> - -#ifdef SVR4 -#include <sys/conf.h> -#include <sys/cmn_err.h> -#include <sys/ddi.h> -#else -#include <sys/user.h> -#ifdef __osf__ -#include <sys/cmn_err.h> -#endif -#endif /* SVR4 */ - -#include <net/ppp_defs.h> -#include <net/pppio.h> -#include "ppp_mod.h" - -#ifdef __osf__ -#include <sys/mbuf.h> -#include <sys/protosw.h> -#endif - -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <net/vjcompress.h> - -#define PACKETPTR mblk_t * -#include <net/ppp-comp.h> - -MOD_OPEN_DECL(ppp_comp_open); -MOD_CLOSE_DECL(ppp_comp_close); -static int ppp_comp_rput __P((queue_t *, mblk_t *)); -static int ppp_comp_rsrv __P((queue_t *)); -static int ppp_comp_wput __P((queue_t *, mblk_t *)); -static int ppp_comp_wsrv __P((queue_t *)); -static void ppp_comp_ccp __P((queue_t *, mblk_t *, int)); -static int msg_byte __P((mblk_t *, unsigned int)); - -/* Extract byte i of message mp. */ -#define MSG_BYTE(mp, i) ((i) < (mp)->b_wptr - (mp)->b_rptr? (mp)->b_rptr[i]: \ - msg_byte((mp), (i))) - -/* Is this LCP packet one we have to transmit using LCP defaults? */ -#define LCP_USE_DFLT(mp) (1 <= (code = MSG_BYTE((mp), 4)) && code <= 7) - -#define PPP_COMP_ID 0xbadf -static struct module_info minfo = { -#ifdef PRIOQ - PPP_COMP_ID, "ppp_comp", 0, INFPSZ, 16512, 16384, -#else - PPP_COMP_ID, "ppp_comp", 0, INFPSZ, 16384, 4096, -#endif -}; - -static struct qinit r_init = { - ppp_comp_rput, ppp_comp_rsrv, ppp_comp_open, ppp_comp_close, - NULL, &minfo, NULL -}; - -static struct qinit w_init = { - ppp_comp_wput, ppp_comp_wsrv, NULL, NULL, NULL, &minfo, NULL -}; - -#if defined(SVR4) && !defined(SOL2) -int pcmpdevflag = 0; -#define ppp_compinfo pcmpinfo -#endif -struct streamtab ppp_compinfo = { - &r_init, &w_init, NULL, NULL -}; - -int ppp_comp_count; /* number of module instances in use */ - -#ifdef __osf__ - -static void ppp_comp_alloc __P((comp_state_t *)); -typedef struct memreq { - unsigned char comp_opts[20]; - int cmd; - int thread_status; - char *returned_mem; -} memreq_t; - -#endif - -typedef struct comp_state { - int flags; - int mru; - int mtu; - int unit; - struct compressor *xcomp; - void *xstate; - struct compressor *rcomp; - void *rstate; - struct vjcompress vj_comp; - int vj_last_ierrors; - struct pppstat stats; -#ifdef __osf__ - memreq_t memreq; - thread_t thread; -#endif -} comp_state_t; - - -#ifdef __osf__ -extern task_t first_task; -#endif - -/* Bits in flags are as defined in pppio.h. */ -#define CCP_ERR (CCP_ERROR | CCP_FATALERROR) -#define LAST_MOD 0x1000000 /* no ppp modules below us */ -#define DBGLOG 0x2000000 /* log debugging stuff */ - -#define MAX_IPHDR 128 /* max TCP/IP header size */ -#define MAX_VJHDR 20 /* max VJ compressed header size (?) */ - -#undef MIN /* just in case */ -#define MIN(a, b) ((a) < (b)? (a): (b)) - -/* - * List of compressors we know about. - */ - -#if DO_BSD_COMPRESS -extern struct compressor ppp_bsd_compress; -#endif -#if DO_DEFLATE -extern struct compressor ppp_deflate, ppp_deflate_draft; -#endif - -struct compressor *ppp_compressors[] = { -#if DO_BSD_COMPRESS - &ppp_bsd_compress, -#endif -#if DO_DEFLATE - &ppp_deflate, - &ppp_deflate_draft, -#endif - NULL -}; - -/* - * STREAMS module entry points. - */ -MOD_OPEN(ppp_comp_open) -{ - comp_state_t *cp; -#ifdef __osf__ - thread_t thread; -#endif - - if (q->q_ptr == NULL) { - cp = (comp_state_t *) ALLOC_SLEEP(sizeof(comp_state_t)); - if (cp == NULL) - OPEN_ERROR(ENOSR); - bzero((caddr_t)cp, sizeof(comp_state_t)); - WR(q)->q_ptr = q->q_ptr = (caddr_t) cp; - cp->mru = PPP_MRU; - cp->mtu = PPP_MTU; - cp->xstate = NULL; - cp->rstate = NULL; - vj_compress_init(&cp->vj_comp, -1); -#ifdef __osf__ - if (!(thread = kernel_thread_w_arg(first_task, ppp_comp_alloc, (void *)cp))) - OPEN_ERROR(ENOSR); - cp->thread = thread; -#endif - ++ppp_comp_count; - qprocson(q); - } - return 0; -} - -MOD_CLOSE(ppp_comp_close) -{ - comp_state_t *cp; - - qprocsoff(q); - cp = (comp_state_t *) q->q_ptr; - if (cp != NULL) { - if (cp->xstate != NULL) - (*cp->xcomp->comp_free)(cp->xstate); - if (cp->rstate != NULL) - (*cp->rcomp->decomp_free)(cp->rstate); -#ifdef __osf__ - if (!cp->thread) - printf("ppp_comp_close: NULL thread!\n"); - else - thread_terminate(cp->thread); -#endif - FREE(cp, sizeof(comp_state_t)); - q->q_ptr = NULL; - OTHERQ(q)->q_ptr = NULL; - --ppp_comp_count; - } - return 0; -} - -#ifdef __osf__ - -/* thread for calling back to a compressor's memory allocator - * Needed for Digital UNIX since it's VM can't handle requests - * for large amounts of memory without blocking. The thread - * provides a context in which we can call a memory allocator - * that may block. - */ -static void -ppp_comp_alloc(comp_state_t *cp) -{ - int len, cmd; - unsigned char *compressor_options; - thread_t thread; - void *(*comp_allocator)(); - - -#if defined(MAJOR_VERSION) && (MAJOR_VERSION <= 2) - - /* In 2.x and earlier the argument gets passed - * in the thread structure itself. Yuck. - */ - thread = current_thread(); - cp = thread->reply_port; - thread->reply_port = PORT_NULL; - -#endif - - for (;;) { - assert_wait((vm_offset_t)&cp->memreq.thread_status, TRUE); - thread_block(); - - if (thread_should_halt(current_thread())) - thread_halt_self(); - cmd = cp->memreq.cmd; - compressor_options = &cp->memreq.comp_opts[0]; - len = compressor_options[1]; - if (cmd == PPPIO_XCOMP) { - cp->memreq.returned_mem = cp->xcomp->comp_alloc(compressor_options, len); - if (!cp->memreq.returned_mem) { - cp->memreq.thread_status = ENOSR; - } else { - cp->memreq.thread_status = 0; - } - } else { - cp->memreq.returned_mem = cp->rcomp->decomp_alloc(compressor_options, len); - if (!cp->memreq.returned_mem) { - cp->memreq.thread_status = ENOSR; - } else { - cp->memreq.thread_status = 0; - } - } - } -} - -#endif /* __osf__ */ - -/* here's the deal with memory allocation under Digital UNIX. - * Some other may also benefit from this... - * We can't ask for huge chunks of memory in a context where - * the caller can't be put to sleep (like, here.) The alloc - * is likely to fail. Instead we do this: the first time we - * get called, kick off a thread to do the allocation. Return - * immediately to the caller with EAGAIN, as an indication that - * they should send down the ioctl again. By the time the - * second call comes in it's likely that the memory allocation - * thread will have returned with the requested memory. We will - * continue to return EAGAIN however until the thread has completed. - * When it has, we return zero (and the memory) if the allocator - * was successful and ENOSR otherwise. - * - * Callers of the RCOMP and XCOMP ioctls are encouraged (but not - * required) to loop for some number of iterations with a small - * delay in the loop body (for instance a 1/10-th second "sleep" - * via select.) - */ -static int -ppp_comp_wput(q, mp) - queue_t *q; - mblk_t *mp; -{ - struct iocblk *iop; - comp_state_t *cp; - int error, len, n; - int flags, mask; - mblk_t *np; - struct compressor **comp; - struct ppp_stats *psp; - struct ppp_comp_stats *csp; - unsigned char *opt_data; - int nxslots, nrslots; - - cp = (comp_state_t *) q->q_ptr; - if (cp == 0) { - DPRINT("cp == 0 in ppp_comp_wput\n"); - freemsg(mp); - return 0; - } - - switch (mp->b_datap->db_type) { - - case M_DATA: - putq(q, mp); - break; - - case M_IOCTL: - iop = (struct iocblk *) mp->b_rptr; - error = EINVAL; - switch (iop->ioc_cmd) { - - case PPPIO_CFLAGS: - /* set/get CCP state */ - if (iop->ioc_count != 2 * sizeof(int)) - break; - if (mp->b_cont == 0) { - DPRINT1("ppp_comp_wput/%d: PPPIO_CFLAGS b_cont = 0!\n", cp->unit); - break; - } - flags = ((int *) mp->b_cont->b_rptr)[0]; - mask = ((int *) mp->b_cont->b_rptr)[1]; - cp->flags = (cp->flags & ~mask) | (flags & mask); - if ((mask & CCP_ISOPEN) && (flags & CCP_ISOPEN) == 0) { - if (cp->xstate != NULL) { - (*cp->xcomp->comp_free)(cp->xstate); - cp->xstate = NULL; - } - if (cp->rstate != NULL) { - (*cp->rcomp->decomp_free)(cp->rstate); - cp->rstate = NULL; - } - cp->flags &= ~CCP_ISUP; - } - error = 0; - iop->ioc_count = sizeof(int); - ((int *) mp->b_cont->b_rptr)[0] = cp->flags; - mp->b_cont->b_wptr = mp->b_cont->b_rptr + sizeof(int); - break; - - case PPPIO_VJINIT: - /* - * Initialize VJ compressor/decompressor - */ - if (iop->ioc_count != 2) - break; - if (mp->b_cont == 0) { - DPRINT1("ppp_comp_wput/%d: PPPIO_VJINIT b_cont = 0!\n", cp->unit); - break; - } - nxslots = mp->b_cont->b_rptr[0] + 1; - nrslots = mp->b_cont->b_rptr[1] + 1; - if (nxslots > MAX_STATES || nrslots > MAX_STATES) - break; - vj_compress_init(&cp->vj_comp, nxslots); - cp->vj_last_ierrors = cp->stats.ppp_ierrors; - error = 0; - iop->ioc_count = 0; - break; - - case PPPIO_XCOMP: - case PPPIO_RCOMP: - if (iop->ioc_count <= 0) - break; - if (mp->b_cont == 0) { - DPRINT1("ppp_comp_wput/%d: PPPIO_[XR]COMP b_cont = 0!\n", cp->unit); - break; - } - opt_data = mp->b_cont->b_rptr; - len = mp->b_cont->b_wptr - opt_data; - if (len > iop->ioc_count) - len = iop->ioc_count; - if (opt_data[1] < 2 || opt_data[1] > len) - break; - for (comp = ppp_compressors; *comp != NULL; ++comp) - if ((*comp)->compress_proto == opt_data[0]) { - /* here's the handler! */ - error = 0; -#ifndef __osf__ - if (iop->ioc_cmd == PPPIO_XCOMP) { - /* A previous call may have fetched memory for a compressor - * that's now being retired or reset. Free it using it's - * mechanism for freeing stuff. - */ - if (cp->xstate != NULL) { - (*cp->xcomp->comp_free)(cp->xstate); - cp->xstate = NULL; - } - cp->xcomp = *comp; - cp->xstate = (*comp)->comp_alloc(opt_data, len); - if (cp->xstate == NULL) - error = ENOSR; - } else { - if (cp->rstate != NULL) { - (*cp->rcomp->decomp_free)(cp->rstate); - cp->rstate = NULL; - } - cp->rcomp = *comp; - cp->rstate = (*comp)->decomp_alloc(opt_data, len); - if (cp->rstate == NULL) - error = ENOSR; - } -#else - if ((error = cp->memreq.thread_status) != EAGAIN) - if (iop->ioc_cmd == PPPIO_XCOMP) { - if (cp->xstate) { - (*cp->xcomp->comp_free)(cp->xstate); - cp->xstate = 0; - } - /* sanity check for compressor options - */ - if (sizeof (cp->memreq.comp_opts) < len) { - printf("can't handle options for compressor %d (%d)\n", opt_data[0], - opt_data[1]); - cp->memreq.thread_status = ENOSR; - cp->memreq.returned_mem = 0; - } - /* fill in request for the thread and kick it off - */ - if (cp->memreq.thread_status == 0 && !cp->memreq.returned_mem) { - bcopy(opt_data, cp->memreq.comp_opts, len); - cp->memreq.cmd = PPPIO_XCOMP; - cp->xcomp = *comp; - error = cp->memreq.thread_status = EAGAIN; - thread_wakeup((vm_offset_t)&cp->memreq.thread_status); - } else { - cp->xstate = cp->memreq.returned_mem; - cp->memreq.returned_mem = 0; - cp->memreq.thread_status = 0; - } - } else { - if (cp->rstate) { - (*cp->rcomp->decomp_free)(cp->rstate); - cp->rstate = NULL; - } - if (sizeof (cp->memreq.comp_opts) < len) { - printf("can't handle options for compressor %d (%d)\n", opt_data[0], - opt_data[1]); - cp->memreq.thread_status = ENOSR; - cp->memreq.returned_mem = 0; - } - if (cp->memreq.thread_status == 0 && !cp->memreq.returned_mem) { - bcopy(opt_data, cp->memreq.comp_opts, len); - cp->memreq.cmd = PPPIO_RCOMP; - cp->rcomp = *comp; - error = cp->memreq.thread_status = EAGAIN; - thread_wakeup((vm_offset_t)&cp->memreq.thread_status); - } else { - cp->rstate = cp->memreq.returned_mem; - cp->memreq.returned_mem = 0; - cp->memreq.thread_status = 0; - } - } -#endif - break; - } - iop->ioc_count = 0; - break; - - case PPPIO_GETSTAT: - if ((cp->flags & LAST_MOD) == 0) { - error = -1; /* let the ppp_ahdl module handle it */ - break; - } - np = allocb(sizeof(struct ppp_stats), BPRI_HI); - if (np == 0) { - error = ENOSR; - break; - } - if (mp->b_cont != 0) - freemsg(mp->b_cont); - mp->b_cont = np; - psp = (struct ppp_stats *) np->b_wptr; - np->b_wptr += sizeof(struct ppp_stats); - iop->ioc_count = sizeof(struct ppp_stats); - psp->p = cp->stats; - psp->vj = cp->vj_comp.stats; - error = 0; - break; - - case PPPIO_GETCSTAT: - np = allocb(sizeof(struct ppp_comp_stats), BPRI_HI); - if (np == 0) { - error = ENOSR; - break; - } - if (mp->b_cont != 0) - freemsg(mp->b_cont); - mp->b_cont = np; - csp = (struct ppp_comp_stats *) np->b_wptr; - np->b_wptr += sizeof(struct ppp_comp_stats); - iop->ioc_count = sizeof(struct ppp_comp_stats); - bzero((caddr_t)csp, sizeof(struct ppp_comp_stats)); - if (cp->xstate != 0) - (*cp->xcomp->comp_stat)(cp->xstate, &csp->c); - if (cp->rstate != 0) - (*cp->rcomp->decomp_stat)(cp->rstate, &csp->d); - error = 0; - break; - - case PPPIO_DEBUG: - if (iop->ioc_count != sizeof(int)) - break; - if (mp->b_cont == 0) { - DPRINT1("ppp_comp_wput/%d: PPPIO_DEBUG b_cont = 0!\n", cp->unit); - break; - } - n = *(int *)mp->b_cont->b_rptr; - if (n == PPPDBG_LOG + PPPDBG_COMP) { - DPRINT1("ppp_comp%d: debug log enabled\n", cp->unit); - cp->flags |= DBGLOG; - error = 0; - iop->ioc_count = 0; - } else { - error = -1; - } - break; - - case PPPIO_LASTMOD: - cp->flags |= LAST_MOD; - error = 0; - break; - - default: - error = -1; - break; - } - - if (error < 0) - putnext(q, mp); - else if (error == 0) { - mp->b_datap->db_type = M_IOCACK; - qreply(q, mp); - } else { - mp->b_datap->db_type = M_IOCNAK; - iop->ioc_error = error; - iop->ioc_count = 0; - qreply(q, mp); - } - break; - - case M_CTL: - switch (*mp->b_rptr) { - case PPPCTL_MTU: - cp->mtu = ((unsigned short *)mp->b_rptr)[1]; - break; - case PPPCTL_MRU: - cp->mru = ((unsigned short *)mp->b_rptr)[1]; - break; - case PPPCTL_UNIT: - cp->unit = mp->b_rptr[1]; - break; - } - putnext(q, mp); - break; - - default: - putnext(q, mp); - } - - return 0; -} - -static int -ppp_comp_wsrv(q) - queue_t *q; -{ - mblk_t *mp, *cmp = NULL; - comp_state_t *cp; - int len, proto, type, hlen, code; - struct ip *ip; - unsigned char *vjhdr, *dp; - - cp = (comp_state_t *) q->q_ptr; - if (cp == 0) { - DPRINT("cp == 0 in ppp_comp_wsrv\n"); - return 0; - } - - while ((mp = getq(q)) != 0) { - /* assert(mp->b_datap->db_type == M_DATA) */ -#ifdef PRIOQ - if (!bcanputnext(q,mp->b_band)) -#else - if (!canputnext(q)) -#endif PRIOQ - { - putbq(q, mp); - break; - } - - /* - * First check the packet length and work out what the protocol is. - */ - len = msgdsize(mp); - if (len < PPP_HDRLEN) { - DPRINT1("ppp_comp_wsrv: bogus short packet (%d)\n", len); - freemsg(mp); - cp->stats.ppp_oerrors++; - putctl1(RD(q)->q_next, M_CTL, PPPCTL_OERROR); - continue; - } - proto = (MSG_BYTE(mp, 2) << 8) + MSG_BYTE(mp, 3); - - /* - * Make sure we've got enough data in the first mblk - * and that we are its only user. - */ - if (proto == PPP_CCP) - hlen = len; - else if (proto == PPP_IP) - hlen = PPP_HDRLEN + MAX_IPHDR; - else - hlen = PPP_HDRLEN; - if (hlen > len) - hlen = len; - if (mp->b_wptr < mp->b_rptr + hlen || mp->b_datap->db_ref > 1) { - PULLUP(mp, hlen); - if (mp == 0) { - DPRINT1("ppp_comp_wsrv: pullup failed (%d)\n", hlen); - cp->stats.ppp_oerrors++; - putctl1(RD(q)->q_next, M_CTL, PPPCTL_OERROR); - continue; - } - } - - /* - * Do VJ compression if requested. - */ - if (proto == PPP_IP && (cp->flags & COMP_VJC)) { - ip = (struct ip *) (mp->b_rptr + PPP_HDRLEN); - if (ip->ip_p == IPPROTO_TCP) { - type = vj_compress_tcp(ip, len - PPP_HDRLEN, &cp->vj_comp, - (cp->flags & COMP_VJCCID), &vjhdr); - switch (type) { - case TYPE_UNCOMPRESSED_TCP: - mp->b_rptr[3] = proto = PPP_VJC_UNCOMP; - break; - case TYPE_COMPRESSED_TCP: - dp = vjhdr - PPP_HDRLEN; - dp[1] = mp->b_rptr[1]; /* copy control field */ - dp[0] = mp->b_rptr[0]; /* copy address field */ - dp[2] = 0; /* set protocol field */ - dp[3] = proto = PPP_VJC_COMP; - mp->b_rptr = dp; - break; - } - } - } - - /* - * Do packet compression if enabled. - */ - if (proto == PPP_CCP) - ppp_comp_ccp(q, mp, 0); - else if (proto != PPP_LCP && (cp->flags & CCP_COMP_RUN) - && cp->xstate != NULL) { - len = msgdsize(mp); - (*cp->xcomp->compress)(cp->xstate, &cmp, mp, len, - (cp->flags & CCP_ISUP? cp->mtu + PPP_HDRLEN: 0)); - if (cmp != NULL) { -#ifdef PRIOQ - cmp->b_band=mp->b_band; -#endif PRIOQ - freemsg(mp); - mp = cmp; - } - } - - /* - * Do address/control and protocol compression if enabled. - */ - if ((cp->flags & COMP_AC) - && !(proto == PPP_LCP && LCP_USE_DFLT(mp))) { - mp->b_rptr += 2; /* drop the address & ctrl fields */ - if (proto < 0x100 && (cp->flags & COMP_PROT)) - ++mp->b_rptr; /* drop the high protocol byte */ - } else if (proto < 0x100 && (cp->flags & COMP_PROT)) { - /* shuffle up the address & ctrl fields */ - mp->b_rptr[2] = mp->b_rptr[1]; - mp->b_rptr[1] = mp->b_rptr[0]; - ++mp->b_rptr; - } - - cp->stats.ppp_opackets++; - cp->stats.ppp_obytes += msgdsize(mp); - putnext(q, mp); - } - - return 0; -} - -static int -ppp_comp_rput(q, mp) - queue_t *q; - mblk_t *mp; -{ - comp_state_t *cp; - struct iocblk *iop; - struct ppp_stats *psp; - - cp = (comp_state_t *) q->q_ptr; - if (cp == 0) { - DPRINT("cp == 0 in ppp_comp_rput\n"); - freemsg(mp); - return 0; - } - - switch (mp->b_datap->db_type) { - - case M_DATA: - putq(q, mp); - break; - - case M_IOCACK: - iop = (struct iocblk *) mp->b_rptr; - switch (iop->ioc_cmd) { - case PPPIO_GETSTAT: - /* - * Catch this on the way back from the ppp_ahdl module - * so we can fill in the VJ stats. - */ - if (mp->b_cont == 0 || iop->ioc_count != sizeof(struct ppp_stats)) - break; - psp = (struct ppp_stats *) mp->b_cont->b_rptr; - psp->vj = cp->vj_comp.stats; - break; - } - putnext(q, mp); - break; - - case M_CTL: - switch (mp->b_rptr[0]) { - case PPPCTL_IERROR: - ++cp->stats.ppp_ierrors; - break; - case PPPCTL_OERROR: - ++cp->stats.ppp_oerrors; - break; - } - putnext(q, mp); - break; - - default: - putnext(q, mp); - } - - return 0; -} - -static int -ppp_comp_rsrv(q) - queue_t *q; -{ - int proto, rv, i; - mblk_t *mp, *dmp = NULL, *np; - uchar_t *dp, *iphdr; - comp_state_t *cp; - int len, hlen, vjlen; - u_int iphlen; - - cp = (comp_state_t *) q->q_ptr; - if (cp == 0) { - DPRINT("cp == 0 in ppp_comp_rsrv\n"); - return 0; - } - - while ((mp = getq(q)) != 0) { - /* assert(mp->b_datap->db_type == M_DATA) */ - if (!canputnext(q)) { - putbq(q, mp); - break; - } - - len = msgdsize(mp); - cp->stats.ppp_ibytes += len; - cp->stats.ppp_ipackets++; - - /* - * First work out the protocol and where the PPP header ends. - */ - i = 0; - proto = MSG_BYTE(mp, 0); - if (proto == PPP_ALLSTATIONS) { - i = 2; - proto = MSG_BYTE(mp, 2); - } - if ((proto & 1) == 0) { - ++i; - proto = (proto << 8) + MSG_BYTE(mp, i); - } - hlen = i + 1; - - /* - * Now reconstruct a complete, contiguous PPP header at the - * start of the packet. - */ - if (hlen < ((cp->flags & DECOMP_AC)? 0: 2) - + ((cp->flags & DECOMP_PROT)? 1: 2)) { - /* count these? */ - goto bad; - } - if (mp->b_rptr + hlen > mp->b_wptr) { - adjmsg(mp, hlen); /* XXX check this call */ - hlen = 0; - } - if (hlen != PPP_HDRLEN) { - /* - * We need to put some bytes on the front of the packet - * to make a full-length PPP header. - * If we can put them in *mp, we do, otherwise we - * tack another mblk on the front. - * XXX we really shouldn't need to carry around - * the address and control at this stage. - */ - dp = mp->b_rptr + hlen - PPP_HDRLEN; - if (dp < mp->b_datap->db_base || mp->b_datap->db_ref > 1) { - np = allocb(PPP_HDRLEN, BPRI_MED); - if (np == 0) - goto bad; - np->b_cont = mp; - mp->b_rptr += hlen; - mp = np; - dp = mp->b_wptr; - mp->b_wptr += PPP_HDRLEN; - } else - mp->b_rptr = dp; - - dp[0] = PPP_ALLSTATIONS; - dp[1] = PPP_UI; - dp[2] = proto >> 8; - dp[3] = proto; - } - - /* - * Now see if we have a compressed packet to decompress, - * or a CCP packet to take notice of. - */ - proto = PPP_PROTOCOL(mp->b_rptr); - if (proto == PPP_CCP) { - len = msgdsize(mp); - if (mp->b_wptr < mp->b_rptr + len) { - PULLUP(mp, len); - if (mp == 0) - goto bad; - } - ppp_comp_ccp(q, mp, 1); - } else if (proto == PPP_COMP) { - if ((cp->flags & CCP_ISUP) - && (cp->flags & CCP_DECOMP_RUN) && cp->rstate - && (cp->flags & CCP_ERR) == 0) { - rv = (*cp->rcomp->decompress)(cp->rstate, mp, &dmp); - switch (rv) { - case DECOMP_OK: - freemsg(mp); - mp = dmp; - if (mp == NULL) { - /* no error, but no packet returned either. */ - continue; - } - break; - case DECOMP_ERROR: - cp->flags |= CCP_ERROR; - ++cp->stats.ppp_ierrors; - putctl1(q->q_next, M_CTL, PPPCTL_IERROR); - break; - case DECOMP_FATALERROR: - cp->flags |= CCP_FATALERROR; - ++cp->stats.ppp_ierrors; - putctl1(q->q_next, M_CTL, PPPCTL_IERROR); - break; - } - } - } else if (cp->rstate && (cp->flags & CCP_DECOMP_RUN)) { - (*cp->rcomp->incomp)(cp->rstate, mp); - } - - /* - * Now do VJ decompression. - */ - proto = PPP_PROTOCOL(mp->b_rptr); - if (proto == PPP_VJC_COMP || proto == PPP_VJC_UNCOMP) { - len = msgdsize(mp) - PPP_HDRLEN; - if ((cp->flags & DECOMP_VJC) == 0 || len <= 0) - goto bad; - - /* - * Advance past the ppp header. - * Here we assume that the whole PPP header is in the first mblk. - */ - np = mp; - dp = np->b_rptr + PPP_HDRLEN; - if (dp >= mp->b_wptr) { - np = np->b_cont; - dp = np->b_rptr; - } - - /* - * Make sure we have sufficient contiguous data at this point. - */ - hlen = (proto == PPP_VJC_COMP)? MAX_VJHDR: MAX_IPHDR; - if (hlen > len) - hlen = len; - if (np->b_wptr < dp + hlen || np->b_datap->db_ref > 1) { - PULLUP(mp, hlen + PPP_HDRLEN); - if (mp == 0) - goto bad; - np = mp; - dp = np->b_rptr + PPP_HDRLEN; - } - - if (proto == PPP_VJC_COMP) { - /* - * Decompress VJ-compressed packet. - * First reset compressor if an input error has occurred. - */ - if (cp->stats.ppp_ierrors != cp->vj_last_ierrors) { - if (cp->flags & DBGLOG) - DPRINT1("ppp%d: resetting VJ\n", cp->unit); - vj_uncompress_err(&cp->vj_comp); - cp->vj_last_ierrors = cp->stats.ppp_ierrors; - } - - vjlen = vj_uncompress_tcp(dp, np->b_wptr - dp, len, - &cp->vj_comp, &iphdr, &iphlen); - if (vjlen < 0) { - if (cp->flags & DBGLOG) - DPRINT2("ppp%d: vj_uncomp_tcp failed, pkt len %d\n", - cp->unit, len); - ++cp->vj_last_ierrors; /* so we don't reset next time */ - goto bad; - } - - /* drop ppp and vj headers off */ - if (mp != np) { - freeb(mp); - mp = np; - } - mp->b_rptr = dp + vjlen; - - /* allocate a new mblk for the ppp and ip headers */ - if ((np = allocb(iphlen + PPP_HDRLEN + 4, BPRI_MED)) == 0) - goto bad; - dp = np->b_rptr; /* prepend mblk with TCP/IP hdr */ - dp[0] = PPP_ALLSTATIONS; /* reconstruct PPP header */ - dp[1] = PPP_UI; - dp[2] = PPP_IP >> 8; - dp[3] = PPP_IP; - bcopy((caddr_t)iphdr, (caddr_t)dp + PPP_HDRLEN, iphlen); - np->b_wptr = dp + iphlen + PPP_HDRLEN; - np->b_cont = mp; - - /* XXX there seems to be a bug which causes panics in strread - if we make an mbuf with only the IP header in it :-( */ - if (mp->b_wptr - mp->b_rptr > 4) { - bcopy((caddr_t)mp->b_rptr, (caddr_t)np->b_wptr, 4); - mp->b_rptr += 4; - np->b_wptr += 4; - } else { - bcopy((caddr_t)mp->b_rptr, (caddr_t)np->b_wptr, - mp->b_wptr - mp->b_rptr); - np->b_wptr += mp->b_wptr - mp->b_rptr; - np->b_cont = mp->b_cont; - freeb(mp); - } - - mp = np; - - } else { - /* - * "Decompress" a VJ-uncompressed packet. - */ - cp->vj_last_ierrors = cp->stats.ppp_ierrors; - if (!vj_uncompress_uncomp(dp, hlen, &cp->vj_comp)) { - if (cp->flags & DBGLOG) - DPRINT2("ppp%d: vj_uncomp_uncomp failed, pkt len %d\n", - cp->unit, len); - ++cp->vj_last_ierrors; /* don't need to reset next time */ - goto bad; - } - mp->b_rptr[3] = PPP_IP; /* fix up the PPP protocol field */ - } - } - - putnext(q, mp); - continue; - - bad: - if (mp != 0) - freemsg(mp); - cp->stats.ppp_ierrors++; - putctl1(q->q_next, M_CTL, PPPCTL_IERROR); - } - - return 0; -} - -/* - * Handle a CCP packet being sent or received. - * Here all the data in the packet is in a single mbuf. - */ -static void -ppp_comp_ccp(q, mp, rcvd) - queue_t *q; - mblk_t *mp; - int rcvd; -{ - int len, clen; - comp_state_t *cp; - unsigned char *dp; - - len = msgdsize(mp); - if (len < PPP_HDRLEN + CCP_HDRLEN) - return; - - cp = (comp_state_t *) q->q_ptr; - dp = mp->b_rptr + PPP_HDRLEN; - len -= PPP_HDRLEN; - clen = CCP_LENGTH(dp); - if (clen > len) - return; - - switch (CCP_CODE(dp)) { - case CCP_CONFREQ: - case CCP_TERMREQ: - case CCP_TERMACK: - cp->flags &= ~CCP_ISUP; - break; - - case CCP_CONFACK: - if ((cp->flags & (CCP_ISOPEN | CCP_ISUP)) == CCP_ISOPEN - && clen >= CCP_HDRLEN + CCP_OPT_MINLEN - && clen >= CCP_HDRLEN + CCP_OPT_LENGTH(dp + CCP_HDRLEN)) { - if (!rcvd) { - if (cp->xstate != NULL - && (*cp->xcomp->comp_init) - (cp->xstate, dp + CCP_HDRLEN, clen - CCP_HDRLEN, - cp->unit, 0, ((cp->flags & DBGLOG) != 0))) - cp->flags |= CCP_COMP_RUN; - } else { - if (cp->rstate != NULL - && (*cp->rcomp->decomp_init) - (cp->rstate, dp + CCP_HDRLEN, clen - CCP_HDRLEN, - cp->unit, 0, cp->mru, ((cp->flags & DBGLOG) != 0))) - cp->flags = (cp->flags & ~CCP_ERR) | CCP_DECOMP_RUN; - } - } - break; - - case CCP_RESETACK: - if (cp->flags & CCP_ISUP) { - if (!rcvd) { - if (cp->xstate && (cp->flags & CCP_COMP_RUN)) - (*cp->xcomp->comp_reset)(cp->xstate); - } else { - if (cp->rstate && (cp->flags & CCP_DECOMP_RUN)) { - (*cp->rcomp->decomp_reset)(cp->rstate); - cp->flags &= ~CCP_ERROR; - } - } - } - break; - } -} - -#if 0 -dump_msg(mp) - mblk_t *mp; -{ - dblk_t *db; - - while (mp != 0) { - db = mp->b_datap; - DPRINT2("mp=%x cont=%x ", mp, mp->b_cont); - DPRINT3("rptr=%x wptr=%x datap=%x\n", mp->b_rptr, mp->b_wptr, db); - DPRINT2(" base=%x lim=%x", db->db_base, db->db_lim); - DPRINT2(" ref=%d type=%d\n", db->db_ref, db->db_type); - mp = mp->b_cont; - } -} -#endif - -static int -msg_byte(mp, i) - mblk_t *mp; - unsigned int i; -{ - while (mp != 0 && i >= mp->b_wptr - mp->b_rptr) - mp = mp->b_cont; - if (mp == 0) - return -1; - return mp->b_rptr[i]; -} |