212 lines
4.0 KiB
C
212 lines
4.0 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* IP Over ATM Support
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* -------------------
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*
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* Process stack and data input
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*
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*/
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#include <netatm/kern_include.h>
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#include <netatm/ipatm/ipatm_var.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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/*
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* Process VCC Input Data
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*
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* Arguments:
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* tok ipatm connection token (pointer to ipvcc)
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* m pointer to input packet buffer chain
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*
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* Returns:
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* none
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*
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*/
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void
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ipatm_cpcs_data(tok, m)
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void *tok;
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KBuffer *m;
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{
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struct ipvcc *ivp = tok;
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#ifdef DIAGNOSTIC
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if (ipatm_print) {
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atm_pdu_print(m, "ipatm_input");
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}
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#endif
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/*
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* Handle input packet
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*/
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if (ivp->iv_state != IPVCC_ACTIVE) {
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KB_FREEALL(m);
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ipatm_stat.ias_rcvstate++;
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return;
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}
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/*
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* IP packet - reset idle timer
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*/
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ivp->iv_idle = 0;
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/*
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* Pass packet to IP
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*/
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(void) ipatm_ipinput(ivp->iv_ipnif, m);
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}
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/*
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* IP Input Packet Handler
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*
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* All IP packets received from various ATM sources will be sent here
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* for final queuing to the IP layer.
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*
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* Arguments:
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* inp pointer to packet's receiving IP network interface
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* m pointer to packet buffer chain
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*
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* Returns:
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* 0 packet successfully queued to IP layer
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* else error queuing packet, buffer chain freed
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*
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*/
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int
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ipatm_ipinput(inp, m)
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struct ip_nif *inp;
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KBuffer *m;
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{
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int s;
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#if BSD < 199103
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int space;
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#endif
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#ifdef DIAGNOSTIC
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if (ipatm_print) {
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atm_pdu_print(m, "ipatm_ipinput");
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}
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#endif
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#if defined(BSD)
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#if BSD >= 199103
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#ifdef DIAGNOSTIC
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if (!KB_ISPKT(m)) {
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panic("ipatm_ipinput: no packet header");
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}
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{
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int cnt = 0;
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KBuffer *m0 = m;
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while (m0) {
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cnt += KB_LEN(m0);
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m0 = KB_NEXT(m0);
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}
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if (m->m_pkthdr.len != cnt) {
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panic("ipatm_ipinput: packet length incorrect");
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}
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}
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#endif
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/*
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* Save the input ifnet pointer in the packet header
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*/
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m->m_pkthdr.rcvif = (struct ifnet *)inp->inf_nif;
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#else /* ! BSD >= 199103 */
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/*
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* Stick ifnet pointer onto front of packet - hopefully
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* there'll be room in the first buffer.
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*/
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KB_HEADROOM(m, space);
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if (space < sizeof(struct ifnet *)) {
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KBuffer *n;
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/*
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* We have to allocate another buffer and tack it
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* onto the front of the packet
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*/
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KB_ALLOCPKT(n, sizeof(struct ifnet *),
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KB_F_NOWAIT, KB_T_HEADER);
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if (n == 0) {
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KB_FREEALL(m);
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ipatm_stat.ias_rcvnobuf++;
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return (1);
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}
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KB_LEN(n) = sizeof(struct ifnet *);
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KB_LINKHEAD(n, m);
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m = n;
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} else {
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/*
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* Header fits, just adjust buffer controls
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*/
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KB_HEADADJ(m, sizeof(struct ifnet *));
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}
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{
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struct ifnet **p;
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KB_DATASTART(m, p, struct ifnet **);
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*p = (struct ifnet *)inp->inf_nif;
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}
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#endif /* ! BSD >= 199103 */
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/*
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* Finally, hand packet off to IP.
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*
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* NB: Since we're already in the softint kernel state, we
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* just call IP directly to avoid the extra unnecessary
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* kernel scheduling.
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*/
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s = splimp();
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if (IF_QFULL(&ipintrq)) {
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IF_DROP(&ipintrq);
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(void) splx(s);
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KB_FREEALL(m);
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return (1);
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}
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IF_ENQUEUE(&ipintrq, m);
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(void) splx(s);
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#if BSD < 199506
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ipintr();
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#else
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schednetisr ( NETISR_IP );
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#endif /* BSD >= 199506 */
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#endif /* defined(BSD) */
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return (0);
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}
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