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