2 * ppp.c - Network Point to Point Protocol program file.
64  * if_ppp.h - Point-to-Point Protocol definitions.
153   PDPROTOCOL1, /* Process protocol field 1. */
154   PDPROTOCOL2, /* Process protocol field 2. */
183   u16_t inProtocol;             /* The input protocol code. */
207   int  pcomp;                   /* Does peer accept protocol compression? */
231   int         protocol; /* PPP procotol, e.g. PPP_IP */  member
258  * PPP Data Link Layer "protocol" table.
259  * One entry per supported protocol.
410   lcp_open(pd); /* Start protocol */  in pppStart()
453     /* Initialize each protocol to the standard option set. */  in pppInit()
770   u_short protocol = PPP_IP;  in pppifOutputOverEthernet()  local
775   pb = pbuf_alloc(PBUF_LINK, PPPOE_HDRLEN + sizeof(protocol), PBUF_RAM);  in pppifOutputOverEthernet()
787   if (!pc->pcomp || protocol > 0xFF) {  in pppifOutputOverEthernet()
788     *((u_char*)pb->payload + i++) = (protocol >> 8) & 0xFF;  in pppifOutputOverEthernet()
790   *((u_char*)pb->payload + i) = protocol & 0xFF;  in pppifOutputOverEthernet()
815   u_short protocol = PPP_IP;  in pppifOutput()  local
824   /* We let any protocol value go through - it can't hurt us  in pppifOutput()
866   if (protocol == PPP_IP && pc->vjEnabled) {  in pppifOutput()
870            protocol = PPP_IP_PROTOCOL; */  in pppifOutput()
873         protocol = PPP_VJC_COMP;  in pppifOutput()
876         protocol = PPP_VJC_UNCOMP;  in pppifOutput()
903   if (!pc->pcomp || protocol > 0xFF) {  in pppifOutput()
904     c = (protocol >> 8) & 0xFF;  in pppifOutput()
908   c = protocol & 0xFF;  in pppifOutput()
941               pd, protocol));  in pppifOutput()
950   PPPDEBUG(LOG_INFO, ("pppifOutput[%d]: proto=0x%"X16_F"\n", pd, protocol));  in pppifOutput()
1516  * to section 4 of RFC 1661: The Point-To-Point Protocol. */
1606   u16_t protocol;  in pppInput()  local
1610   protocol = ((struct pppInputHeader *)nb->payload)->proto;  in pppInput()
1626   if((lcp_phase[pd] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) {  in pppInput()
1627     if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) ||  in pppInput()
1629 …PPPDEBUG(LOG_INFO, ("pppInput: discarding proto 0x%"X16_F" in phase %d\n", protocol, lcp_phase[pd]…  in pppInput()
1634   switch(protocol) {  in pppInput()
1649       /* No handler for this protocol so drop the packet. */  in pppInput()
1668       /* No handler for this protocol so drop the packet. */  in pppInput()
1675     case PPP_IP:            /* Internet Protocol */  in pppInput()
1688        * Upcall the proper protocol input routine.  in pppInput()
1691         if (protp->protocol == protocol && protp->enabled_flag) {  in pppInput()
1700       /* No handler for this protocol so reject the packet. */  in pppInput()
1701 …OG_INFO, ("pppInput[%d]: rejecting unsupported proto 0x%"X16_F" len=%d\n", pd, protocol, nb->len));  in pppInput()
1702       if (pbuf_header(nb, sizeof(protocol))) {  in pppInput()
1707       protocol = htons(protocol);  in pppInput()
1709       SMEMCPY(nb->payload, &protocol, sizeof(protocol));  in pppInput()
1900            * fall through to get the protocol... */  in pppInProc()
1914         case PDPROTOCOL1:               /* Process protocol field 1. */  in pppInProc()
1915           /* If the lower bit is set, this is the end of the protocol  in pppInProc()
1925         case PDPROTOCOL2:               /* Process protocol field 2. */  in pppInProc()
1986     PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: too small for protocol field\n"));  in pppInProcOverEthernet()