ppp.c
资源名称:export.zip [点击查看]
上传用户:hepax88
上传日期:2007-01-03
资源大小:1101k
文件大小:21k
源码类别:
TCP/IP协议栈
开发平台:
Visual C++
- /*
- * PPP.C -- Send and receive datagrams on serial lines with
- * Point-to-Point Protocol
- *
- * This implementation of PPP is declared to be in the public domain.
- *
- * Based (in part) upon previous implementations by:
- * 1989 -- Drew Daniel Perkins (ddp@andrew.cmu.edu)
- * Carnegie Mellon University
- * 09-90 -- Katie Stevens (dkstevens@ucdavis.edu)
- * UC Davis, Computing Services
- *
- * Jan 91 Bill_Simpson@um.cc.umich.edu
- * Computer Systems Consulting Services
- *
- * Feb 91 Glenn McGregor (ghm@merit.edu)
- * Testing and suggestions.
- *
- * May 91 Bill Simpson & Glenn McGregor
- * Update to newest LCP and IPCP draft RFCs.
- * Add quick installation features.
- * Add support for echo and discard message sending.
- *
- * Jul 91 Glenn McGregor & Bill Simpson
- * Improve PAP user interface and fix related bugs.
- * Remove kwaits and "phase machine".
- */
- #include "global.h"
- #include "mbuf.h"
- #include "proc.h"
- #include "iface.h"
- #include "internet.h"
- #include "ip.h"
- #include "slhc.h"
- #include "n8250.h"
- #include "asy.h"
- #include "pktdrvr.h"
- #include "socket.h"
- #include "devparam.h"
- #include "ppp.h"
- #include "pppfsm.h"
- #include "ppplcp.h"
- #include "ppppap.h"
- #include "pppipcp.h"
- #include "trace.h"
- /* Routines local to this file */
- static void htonppp(struct ppp_hdr *ppp, struct mbuf **data);
- static void ppp_log(struct ppp_s *ppp_p, char *comment);
- static void ppp_error(struct ppp_s *ppp_p, struct mbuf **bp, char *comment);
- static void ppp_skipped(struct ppp_s *ppp_p, struct mbuf **bp, char *comment);
- static int ppp_raw(struct iface *ifp, struct mbuf **data);
- static void ppp_recv(int dev, void *p1, void *p2);
- static int ppp_iostatus(struct iface *ifp, int command, int32 value);
- static int ppp_discard(struct iface *ifp, struct mbuf **bpp);
- static int ppp_echo(struct iface *ifp, struct mbuf **bpp);
- /*
- * FCS lookup table as generated by fcsgen.c
- */
- static uint16 fcstab[256] = {
- 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
- 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
- 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
- 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
- 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
- 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
- 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
- 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
- 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
- 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
- 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
- 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
- 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
- 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
- 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
- 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
- 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
- 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
- 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
- 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
- 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
- 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
- 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
- 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
- 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
- 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
- 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
- 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
- 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
- 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
- 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
- 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
- };
- #define pppfcs(fcs, c) ((fcs >> 8) ^ fcstab[(fcs ^ c) & 0x00ff])
- #define SP_CHAR 0x20
- /****************************************************************************/
- /* Convert PPP header in host form to network form */
- static void
- htonppp(
- struct ppp_hdr *ppp,
- struct mbuf **bpp
- ){
- register uint8 *cp;
- /* Prepend header onto packet data */
- pushdown(bpp, NULL, PPP_HDR_LEN);
- /* Load header with proper values */
- cp = (*bpp)->data;
- *cp++ = ppp->addr;
- *cp++ = ppp->control;
- cp = put16(cp,ppp->protocol);
- }
- /************************************************************************/
- /* General log routine */
- static void
- ppp_log( ppp_p, comment )
- struct ppp_s *ppp_p;
- char *comment;
- {
- if (ppp_p->trace)
- trace_log(ppp_p->iface,"%s PPP %s",
- ppp_p->iface->name,
- comment);
- }
- /* Bad packet */
- static void
- ppp_error(ppp_p, bpp, comment)
- struct ppp_s *ppp_p;
- struct mbuf **bpp;
- char *comment;
- {
- free_p(bpp);
- ppp_log( ppp_p, comment );
- }
- /* Unknown type input packet */
- static void
- ppp_skipped(
- struct ppp_s *ppp_p,
- struct mbuf **bpp,
- char *comment
- ){
- struct ipcp_s *ipcp_p;
- if ( (ipcp_p = ppp_p->fsm[IPcp].pdv) != NULL ) {
- slhc_toss( ipcp_p->slhcp );
- }
- ppp_error( ppp_p, bpp, comment );
- }
- /****************************************************************************/
- /* Send IP datagram with Point-to-Point Protocol */
- int
- ppp_send(bpp,ifp,gateway,tos)
- struct mbuf **bpp; /* Buffer to send */
- struct iface *ifp; /* Pointer to interface control block */
- int32 gateway; /* Ignored (PPP is point-to-point) */
- uint8 tos;
- {
- struct ppp_s *ppp_p;
- struct ipcp_s *ipcp_p;
- int protocol = PPP_IP_PROTOCOL;
- if (ifp == NULL
- || (ppp_p = ifp->edv) == NULL) {
- free_p(bpp);
- return -1;
- }
- if (ppp_p->fsm[IPcp].state != fsmOPENED) {
- ppp_error( ppp_p, bpp, "not open for IP traffic" );
- ppp_p->OutError++;
- return -1;
- }
- ipcp_p = ppp_p->fsm[IPcp].pdv;
- if (ipcp_p->remote.work.negotiate & IPCP_N_COMPRESS) {
- /* Attempt IP/TCP header compression */
- switch ( slhc_compress(ipcp_p->slhcp, bpp,
- ipcp_p->remote.work.slot_compress) ) {
- case SL_TYPE_IP:
- protocol = PPP_IP_PROTOCOL;
- break;
- case SL_TYPE_COMPRESSED_TCP:
- protocol = PPP_COMPR_PROTOCOL;
- break;
- case SL_TYPE_UNCOMPRESSED_TCP:
- protocol = PPP_UNCOMP_PROTOCOL;
- break;
- default:
- ppp_error( ppp_p, bpp, "bad IP packet" );
- ppp_p->OutError++;
- return -1;
- };
- }
- return (*ifp->output)(ifp,NULL,NULL,protocol,bpp);
- }
- /* Send a packet with PPP header */
- int
- ppp_output(
- struct iface *ifp, /* Pointer to interface control block */
- char *dest, /* Dest addr (ignored; PPP is point-to-point) */
- char *source, /* Source addr (ignored; PPP is point-to-point) */
- uint16 protocol, /* PPP Protocol Type field */
- struct mbuf **data /* Actual data to be sent */
- ){
- struct ppp_s *ppp_p;
- struct ppp_hdr hdr;
- if (ifp == NULL
- || (ppp_p = ifp->edv) == NULL) {
- free_p(data);
- return -1;
- }
- if (ppp_p->phase == pppDEAD) {
- ppp_error( ppp_p, data, "line not up" );
- ppp_p->OutError++;
- return -1;
- }
- hdr.addr = HDLC_ALL_ADDR;
- hdr.control = HDLC_UI;
- hdr.protocol = protocol;
- htonppp(&hdr, data);
- return (*ifp->raw)(ifp,data);
- }
- /* Encode a raw packet in PPP framing, put on link output queue */
- static int
- ppp_raw(
- struct iface *ifp,
- struct mbuf **bpp
- ){
- struct ppp_s *ppp_p = ifp->edv;
- struct lcp_s *lcp_p = ppp_p->fsm[Lcp].pdv;
- int full_lcp, full_ac, full_p;
- uint16 calc_fcs = HDLC_FCS_START;
- int32 accm = LCP_ACCM_DEFAULT;
- struct ppp_hdr ph;
- int len = PPP_HDR_LEN;
- struct mbuf *vbp;
- register uint8 *cp;
- register int c;
- dump(ifp,IF_TRACE_OUT,*bpp);
- ppp_p->OutTxOctetCount += len_p(*bpp) + 2; /* count FCS bytes */
- ifp->rawsndcnt++;
- ifp->lastsent = secclock();
- /* Get the HDLC/PPP header, without actually pulling mbuf up */
- if ( *bpp == NULL || (*bpp)->cnt < PPP_HDR_LEN ) {
- ppp_error( ppp_p, bpp, "link header missing" );
- ppp_p->OutError++;
- return -1;
- }
- ph.addr = (*bpp)->data[0];
- ph.control = (*bpp)->data[1];
- ph.protocol = get16(&(*bpp)->data[2]);
- if ( ( full_lcp = (ph.protocol == PPP_LCP_PROTOCOL) ) == 0
- && (lcp_p->remote.work.negotiate & LCP_N_ACCM) ) {
- accm = lcp_p->remote.work.accm;
- }
- if ( ( full_p = ( full_lcp
- || !(lcp_p->remote.work.negotiate & LCP_N_PFC)
- || ph.protocol >= 0x00ff ) )
- == 0 ) {
- --len;
- }
- /* Discard HDLC address and control fields if possible */
- if ( ( full_ac = ( full_lcp
- || !(lcp_p->remote.work.negotiate & LCP_N_ACFC) ) )
- == 0 ) {
- len -= 2;
- }
- /* Load header with proper values */
- (*bpp)->cnt -= PPP_HDR_LEN - len;
- cp = ((*bpp)->data += PPP_HDR_LEN - len);
- if ( full_ac ) {
- *cp++ = ph.addr;
- *cp++ = ph.control;
- }
- if ( full_p )
- *cp++ = (ph.protocol >> 8);
- *cp++ = (ph.protocol & 0x00ff);
- /* Allocate output mbuf that's twice as long as the packet.
- * This is a worst-case guess (consider a packet full of HDLC_FLAGs!)
- */
- if ((vbp = alloc_mbuf((uint16)(2*len_p(*bpp) + HDLC_ENVLEN))) == NULL) {
- ppp_error( ppp_p, bpp, Nospace );
- ppp_p->OutMemory++;
- return -1;
- }
- cp = vbp->data;
- /* No need to send an opening flag if the previous packet is still
- * being transmitted.
- */
- if ( Asy[ifp->dev].dma.busy == 0 ) {
- /* Flush out any line garbage */
- *cp++ = HDLC_FLAG;
- ppp_p->OutOpenFlag++;
- }
- /* Copy input to output, escaping special characters */
- while ((c = PULLCHAR(bpp)) != -1) {
- /* Fold char value into FCS calculated so far */
- calc_fcs = pppfcs(calc_fcs, c);
- if ( ((c < SP_CHAR) && (accm & (1L << c)))
- || (c == HDLC_ESC_ASYNC)
- || (c == HDLC_FLAG)) {
- *cp++ = HDLC_ESC_ASYNC;
- *cp++ = (c ^ HDLC_ESC_COMPL);
- } else {
- *cp++ = c;
- }
- }
- /* Final FCS calculation */
- calc_fcs ^= 0xffff;
- c = (calc_fcs & 0x00ff); /* Least significant byte first */
- if ( ((c < SP_CHAR) && (accm & (1L << c)))
- ||(c == HDLC_ESC_ASYNC)
- ||(c == HDLC_FLAG)) {
- *cp++ = HDLC_ESC_ASYNC;
- *cp++ = (c ^ HDLC_ESC_COMPL);
- } else {
- *cp++ = c;
- }
- c = (calc_fcs >> 8); /* Most significant byte next */
- if ( ((c < SP_CHAR) && (accm & (1L << c)))
- ||(c == HDLC_ESC_ASYNC)
- ||(c == HDLC_FLAG)) {
- *cp++ = HDLC_ESC_ASYNC;
- *cp++ = (c ^ HDLC_ESC_COMPL);
- } else {
- *cp++ = c;
- }
- /* Tie off the packet */
- *cp++ = HDLC_FLAG;
- vbp->cnt = cp - vbp->data;
- if (ifp->trace & IF_TRACE_RAW)
- raw_dump(ifp,IF_TRACE_OUT,vbp);
- return asy_send(ifp->dev,&vbp);
- }
- /****************************************************************************/
- /* Packetize PPP input from device */
- /* (process started by ppp_init) */
- void
- ppp_recv(dev,p1,p2)
- int dev;
- void *p1;
- void *p2;
- {
- struct iface *ifp = p1;
- struct ppp_s *ppp_p = ifp->edv;
- int32 accm = LCP_ACCM_DEFAULT;
- uint16 calc_fcs = HDLC_FCS_START;
- struct mbuf *raw_bp = NULL;
- struct mbuf *head_bp = NULL;
- struct mbuf *tail_bp = NULL;
- uint8 *cp; /* next byte in tail mbuf */
- register int mode = FALSE;
- register int c;
- while ( (c = get_asy(dev)) != -1 ) {
- #ifdef PPP_DEBUG_RAW
- if (ifp->trace & IF_TRACE_RAW) {
- if ( raw_bp != NULL
- || (raw_bp = alloc_mbuf( LCP_MRU_HI * 2 )) != NULL ) {
- *raw_bp->data++ = c;
- raw_bp->cnt++;
- if ( raw_bp->cnt != 1 && c == HDLC_FLAG ) {
- raw_bp->data = (uint8 *)(raw_bp + 1);
- raw_dump( ifp, IF_TRACE_IN, raw_bp );
- raw_bp->cnt = 0;
- }
- }
- }
- #endif
- if ( c == HDLC_FLAG ) {
- if ( mode & PPP_ESCAPED ) {
- ppp_skipped( ppp_p, &head_bp,
- "deliberate cancellation" );
- ppp_p->InFrame++;
- } else if ( mode & PPP_TOSS ) {
- free_p(& head_bp );
- } else if ( head_bp != NULL ) {
- if ( calc_fcs != HDLC_FCS_FINAL ) {
- ppp_skipped( ppp_p, &head_bp,
- "checksum error" );
- ppp_p->InChecksum++;
- } else {
- /* trim off FCS bytes */
- trim_mbuf(&head_bp, len_p(head_bp)-2);
- net_route(ifp,&head_bp);
- /* Especially on slow machines, serial I/O can be quite
- * compute intensive, so release the machine before we
- * do the next packet. This will allow this packet to
- * go on toward its ultimate destination. [Karn]
- */
- kwait(NULL);
- }
- } else {
- ppp_p->InOpenFlag++;
- }
- /* setup for next buffer */
- mode = FALSE;
- head_bp = tail_bp = NULL;
- calc_fcs = HDLC_FCS_START;
- accm = LCP_ACCM_DEFAULT;
- /* Use negotiated values if LCP finished */
- if (ppp_p->fsm[Lcp].state == fsmOPENED) {
- struct lcp_s *lcp_p = ppp_p->fsm[Lcp].pdv;
- if (lcp_p->local.work.negotiate & LCP_N_ACCM) {
- accm = lcp_p->local.work.accm;
- }
- }
- #ifdef PPP_DEBUG_RAW
- if (!(ifp->trace & IF_TRACE_RAW)) {
- if ( raw_bp != NULL ) {
- free_p(& raw_bp );
- raw_bp = NULL;
- }
- }
- #endif
- continue;
- }
- /* We reach here for every byte inside a frame.
- * (The order of the following tests is important.)
- * Discard spurious control characters.
- * Check for escape sequence.
- * (Allow escaped escape.)
- */
- if ( c < SP_CHAR && (accm & (1L << c)) ) {
- continue;
- } else if ( mode & PPP_ESCAPED ) {
- mode &= ~PPP_ESCAPED;
- c ^= HDLC_ESC_COMPL;
- } else if ( c == HDLC_ESC_ASYNC ) {
- mode |= PPP_ESCAPED;
- continue;
- }
- /* We reach here with a byte for the buffer.
- * Make sure there is room for it.
- */
- if ( tail_bp == NULL ) {
- if ((tail_bp = alloc_mbuf(PPP_ALLOC)) == NULL) {
- ppp_skipped( ppp_p, &tail_bp, Nospace );
- ppp_p->InMemory++;
- mode |= PPP_TOSS;
- continue;
- }
- head_bp = tail_bp;
- cp = tail_bp->data;
- } else if ( tail_bp->cnt >= tail_bp->size ) {
- /* Current mbuf is full */
- if ( (tail_bp->next = alloc_mbuf(PPP_ALLOC)) == NULL ) {
- /* No memory, drop the whole packet */
- ppp_skipped( ppp_p, &head_bp, Nospace );
- ppp_p->InMemory++;
- head_bp = NULL;
- mode |= PPP_TOSS;
- continue;
- }
- tail_bp = tail_bp->next;
- cp = tail_bp->data;
- }
- /* Store the byte, increment counts */
- *cp++ = c;
- tail_bp->cnt++;
- calc_fcs = pppfcs(calc_fcs, c);
- }
- /* clean up afterward */
- free_p(&raw_bp);
- free_p(&head_bp);
- ifp->rxproc = NULL;
- }
- #ifdef TURBOC_SWITCH_BUG
- #pragma option -G-
- #endif
- /* Process incoming PPP packets */
- /* (called from network task) */
- void
- ppp_proc(ifp,bpp)
- struct iface *ifp;
- struct mbuf **bpp;
- {
- struct ppp_s *ppp_p;
- struct ipcp_s *ipcp_p;
- struct ppp_hdr ph;
- uint16 negotiated = FALSE;
- if ( ifp == NULL ) {
- logmsg(-1, "ppp_proc: missing iface" );
- return;
- }
- if ( *bpp == NULL ) {
- trace_log(ifp, "ppp_proc: missing buffer" );
- return;
- }
- ppp_p = ifp->edv;
- ppp_p->InRxOctetCount += len_p(*bpp) + 2; /* count FCS bytes */
- /* Use negotiated values if LCP finished */
- if (ppp_p->fsm[Lcp].state == fsmOPENED) {
- struct lcp_s *lcp_p = ppp_p->fsm[Lcp].pdv;
- negotiated = lcp_p->local.work.negotiate;
- }
- /* HDLC address and control fields may be compressed out */
- if ((byte_t)(*bpp)->data[0] != HDLC_ALL_ADDR) {
- if (!(negotiated & LCP_N_ACFC)) {
- ppp_skipped( ppp_p, bpp, "missing ALL address" );
- ppp_p->InFrame++;
- return;
- }
- } else if ((byte_t)(*bpp)->data[1] != HDLC_UI) {
- if (!(negotiated & LCP_N_ACFC)
- || !(negotiated & LCP_N_PFC)) {
- ppp_skipped( ppp_p, bpp, "missing UI" );
- ppp_p->InFrame++;
- return;
- }
- } else {
- /* skip address/control fields */
- pull16(bpp);
- }
- /* Initialize the expected header */
- ph.addr = HDLC_ALL_ADDR;
- ph.control = HDLC_UI;
- ph.protocol = PULLCHAR(bpp);
- /* First byte of PPP protocol field may be compressed out */
- if ( ph.protocol & 0x01 ) {
- if (!(negotiated & LCP_N_PFC)) {
- ppp_skipped( ppp_p, bpp, "missing upper protocol byte" );
- ppp_p->InFrame++;
- return;
- }
- } else {
- ph.protocol = (ph.protocol << 8) | PULLCHAR(bpp);
- /* Second byte of PPP protocol field must be odd */
- if ( !(ph.protocol & 0x01) ) {
- ppp_skipped( ppp_p, bpp, "missing lower protocol byte" );
- ppp_p->InFrame++;
- return;
- }
- }
- switch(ph.protocol) {
- case PPP_IP_PROTOCOL: /* Regular IP */
- if ( ppp_p->fsm[IPcp].state != fsmOPENED ) {
- ppp_error( ppp_p, bpp, "not open for IP traffic" );
- ppp_p->InError++;
- break;
- }
- ip_route(ifp,bpp,0);
- break;
- case PPP_COMPR_PROTOCOL: /* Van Jacobson Compressed TCP/IP */
- if ( ppp_p->fsm[IPcp].state != fsmOPENED ) {
- ppp_skipped( ppp_p, bpp, "not open for Compressed TCP/IP traffic" );
- ppp_p->InError++;
- break;
- }
- ipcp_p = ppp_p->fsm[IPcp].pdv;
- if (!(ipcp_p->local.work.negotiate & IPCP_N_COMPRESS)) {
- ppp_skipped( ppp_p, bpp, "Compressed TCP/IP not enabled" );
- ppp_p->InError++;
- break;
- }
- if ( slhc_uncompress(ipcp_p->slhcp, bpp) <= 0 ) {
- ppp_error( ppp_p, bpp, "Compressed TCP/IP packet error" );
- ppp_p->InError++;
- break;
- }
- ip_route(ifp,bpp,0);
- break;
- case PPP_UNCOMP_PROTOCOL: /* Van Jacobson Uncompressed TCP/IP */
- if ( ppp_p->fsm[IPcp].state != fsmOPENED ) {
- ppp_skipped( ppp_p, bpp, "not open for Uncompressed TCP/IP traffic" );
- ppp_p->InError++;
- break;
- }
- ipcp_p = ppp_p->fsm[IPcp].pdv;
- if (!(ipcp_p->local.work.negotiate & IPCP_N_COMPRESS)) {
- ppp_skipped( ppp_p, bpp, "Uncompressed TCP/IP not enabled" );
- ppp_p->InError++;
- break;
- }
- if ( slhc_remember(ipcp_p->slhcp, bpp) <= 0 ) {
- ppp_error( ppp_p, bpp, "Uncompressed TCP/IP packet error" );
- ppp_p->InError++;
- break;
- }
- ip_route(ifp,bpp,0);
- break;
- case PPP_LCP_PROTOCOL: /* Link Control Protocol */
- ppp_p->InNCP[Lcp]++;
- fsm_proc(&(ppp_p->fsm[Lcp]),bpp);
- break;
- case PPP_PAP_PROTOCOL: /* Password Authenticate Protocol */
- if (ppp_p->phase != pppAP
- && ppp_p->phase != pppREADY) {
- ppp_error( ppp_p, bpp, "not ready for Authentication" );
- ppp_p->InError++;
- break;
- }
- ppp_p->InNCP[Pap]++;
- pap_proc(&(ppp_p->fsm[Pap]),bpp);
- break;
- case PPP_IPCP_PROTOCOL: /* IP Control Protocol */
- if (ppp_p->phase != pppREADY) {
- ppp_error( ppp_p, bpp, "not ready for IPCP traffic" );
- ppp_p->InError++;
- break;
- }
- ppp_p->InNCP[IPcp]++;
- fsm_proc(&(ppp_p->fsm[IPcp]),bpp);
- break;
- default:
- if ( ppp_p->trace )
- trace_log(ppp_p->iface, "%s PPP Unknown packet protocol: %x;",
- ppp_p->iface->name,
- ph.protocol);
- ppp_p->InUnknown++;
- /* Build Protocol Reject packet:
- * put the header back on ...
- */
- htonppp(&ph,bpp);
- /* ... then pull off the address and control fields ... */
- pull16(bpp);
- /* ... and send it as an LCP packet */
- fsm_send( &(ppp_p->fsm[Lcp]), PROT_REJ, 0, bpp );
- break;
- };
- }
- #ifdef TURBOC_SWITCH_BUG
- #pragma option -G
- #endif
- /************************************************************************/
- /* Keep track of changes in I-O status */
- /* (called through iface iostatus vector) */
- static int
- ppp_iostatus( ifp, command, value )
- struct iface *ifp;
- int command;
- int32 value;
- {
- struct ppp_s *ppp_p = ifp->edv;
- switch ( command ) {
- case PARAM_UP:
- ppp_log( ppp_p, "Physical layer up" );
- if ( ppp_p->phase == pppDEAD ) {
- ppp_p->phase = pppLCP;
- }
- fsm_start( &(ppp_p->fsm[Lcp]) );
- return 0;
- case PARAM_DOWN:
- ppp_log( ppp_p, "Physical layer down" );
- fsm_down( &(ppp_p->fsm[Lcp]) );
- ppp_p->phase = pppDEAD;
- return 0;
- };
- return -1;
- }
- static int
- ppp_discard(
- struct iface *ifp,
- struct mbuf **bpp
- ){
- struct ppp_s *ppp_p = ifp->edv;
- return fsm_send(&(ppp_p->fsm[Lcp]), DISCARD_REQ, 0, bpp);
- }
- static int
- ppp_echo(
- struct iface *ifp,
- struct mbuf **bpp
- ){
- struct ppp_s *ppp_p = ifp->edv;
- return fsm_send(&(ppp_p->fsm[Lcp]), ECHO_REQ, 0, bpp);
- }
- /****************************************************************************/
- /* Initialize PPP control structures for a Point-to-Point interface */
- int
- ppp_init(ifp)
- struct iface *ifp;
- {
- struct ppp_s *ppp_p;
- char *ifn;
- /* Setup for Point-to-Point Protocol */
- ifp->ioctl = asy_ioctl;
- ppp_p = callocw(1,sizeof(struct ppp_s));
- ifp->edv = ppp_p;
- ifp->iostatus = ppp_iostatus;
- ifp->raw = ppp_raw;
- ifp->show = ppp_show;
- ifp->echo = ppp_echo;
- ifp->discard = ppp_discard;
- ppp_p->iface = ifp;
- ppp_p->phase = pppDEAD;
- lcp_init(ppp_p);
- pap_init(ppp_p);
- ipcp_init(ppp_p);
- ifp->rxproc = newproc( ifn = if_name( ifp, " receive" ),
- 320, ppp_recv, ifp->dev, ifp, NULL, 0);
- free(ifn);
- return 0;
- }
- int
- ppp_free(ifp)
- struct iface *ifp;
- {
- struct ppp_s *ppp_p = ifp->edv;
- int fsmi;
- alert( ifp->rxproc, 1 );
- for ( fsmi = Lcp; fsmi < fsmi_Size; ) {
- fsm_free( &(ppp_p->fsm[fsmi++]) );
- }
- free( ppp_p->peername );
- free( ppp_p );
- return 0;
- }