1cafed3941
drain routines are done by swi_net, which allows for better queue control at some future point. Packets may also be directly dispatched to a netisr instead of queued, this may be of interest at some installations, but currently defaults to off. Reviewed by: hsu, silby, jayanth, sam Sponsored by: DARPA, NAI Labs
168 lines
3.4 KiB
C
168 lines
3.4 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 <sys/param.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netatm/port.h>
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#include <netatm/queue.h>
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#include <netatm/atm.h>
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#include <netatm/atm_sys.h>
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#include <netatm/atm_sap.h>
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#include <netatm/atm_cm.h>
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#include <netatm/atm_if.h>
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#include <netatm/atm_stack.h>
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#include <netatm/atm_pcb.h>
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#include <netatm/atm_var.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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#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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#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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/*
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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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netisr_dispatch(NETISR_IP, m);
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return (0);
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}
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