3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
8 * This Host ATM Research Platform ("HARP") file (the "Software") is
9 * made available by Network Computing Services, Inc. ("NetworkCS")
10 * "AS IS". NetworkCS does not provide maintenance, improvements or
11 * support of any kind.
13 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
14 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
15 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
16 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
17 * In no event shall NetworkCS be responsible for any damages, including
18 * but not limited to consequential damages, arising from or relating to
19 * any use of the Software or related support.
21 * Copyright 1994-1998 Network Computing Services, Inc.
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
26 * @(#) $FreeBSD: src/sys/netatm/ipatm/ipatm_input.c,v 1.4 2000/01/17 20:49:43 mks Exp $
27 * @(#) $DragonFly: src/sys/netproto/atm/ipatm/ipatm_input.c,v 1.4 2003/08/07 21:54:33 dillon Exp $
34 * Process stack and data input
38 #include <netproto/atm/kern_include.h>
40 #include "ipatm_var.h"
43 * Process VCC Input Data
46 * tok ipatm connection token (pointer to ipvcc)
47 * m pointer to input packet buffer chain
54 ipatm_cpcs_data(tok, m)
58 struct ipvcc *ivp = tok;
62 atm_pdu_print(m, "ipatm_input");
69 if (ivp->iv_state != IPVCC_ACTIVE) {
71 ipatm_stat.ias_rcvstate++;
76 * IP packet - reset idle timer
83 (void) ipatm_ipinput(ivp->iv_ipnif, m);
88 * IP Input Packet Handler
90 * All IP packets received from various ATM sources will be sent here
91 * for final queuing to the IP layer.
94 * inp pointer to packet's receiving IP network interface
95 * m pointer to packet buffer chain
98 * 0 packet successfully queued to IP layer
99 * else error queuing packet, buffer chain freed
103 ipatm_ipinput(inp, m)
114 atm_pdu_print(m, "ipatm_ipinput");
123 panic("ipatm_ipinput: no packet header");
133 if (m->m_pkthdr.len != cnt) {
134 panic("ipatm_ipinput: packet length incorrect");
139 * Save the input ifnet pointer in the packet header
141 m->m_pkthdr.rcvif = (struct ifnet *)inp->inf_nif;
143 #else /* ! BSD >= 199103 */
145 * Stick ifnet pointer onto front of packet - hopefully
146 * there'll be room in the first buffer.
148 KB_HEADROOM(m, space);
149 if (space < sizeof(struct ifnet *)) {
153 * We have to allocate another buffer and tack it
154 * onto the front of the packet
156 KB_ALLOCPKT(n, sizeof(struct ifnet *),
157 KB_F_NOWAIT, KB_T_HEADER);
160 ipatm_stat.ias_rcvnobuf++;
163 KB_LEN(n) = sizeof(struct ifnet *);
168 * Header fits, just adjust buffer controls
170 KB_HEADADJ(m, sizeof(struct ifnet *));
175 KB_DATASTART(m, p, struct ifnet **);
176 *p = (struct ifnet *)inp->inf_nif;
178 #endif /* ! BSD >= 199103 */
181 * Finally, hand packet off to IP.
183 * NB: Since we're already in the softint kernel state, we
184 * just call IP directly to avoid the extra unnecessary
188 if (IF_QFULL(&ipintrq)) {
195 IF_ENQUEUE(&ipintrq, m);
200 schednetisr ( NETISR_IP );
201 #endif /* BSD >= 199506 */
202 #endif /* defined(BSD) */