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 1.5 2003/09/15 23:38:15 hsu 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)
113 atm_pdu_print(m, "ipatm_ipinput");
122 panic("ipatm_ipinput: no packet header");
132 if (m->m_pkthdr.len != cnt) {
133 panic("ipatm_ipinput: packet length incorrect");
138 * Save the input ifnet pointer in the packet header
140 m->m_pkthdr.rcvif = (struct ifnet *)inp->inf_nif;
142 #else /* ! BSD >= 199103 */
144 * Stick ifnet pointer onto front of packet - hopefully
145 * there'll be room in the first buffer.
147 KB_HEADROOM(m, space);
148 if (space < sizeof(struct ifnet *)) {
152 * We have to allocate another buffer and tack it
153 * onto the front of the packet
155 KB_ALLOCPKT(n, sizeof(struct ifnet *),
156 KB_F_NOWAIT, KB_T_HEADER);
159 ipatm_stat.ias_rcvnobuf++;
162 KB_LEN(n) = sizeof(struct ifnet *);
167 * Header fits, just adjust buffer controls
169 KB_HEADADJ(m, sizeof(struct ifnet *));
174 KB_DATASTART(m, p, struct ifnet **);
175 *p = (struct ifnet *)inp->inf_nif;
177 #endif /* ! BSD >= 199103 */
180 * Finally, hand packet off to IP.
182 * NB: Since we're already in the softint kernel state, we
183 * just call IP directly to avoid the extra unnecessary
186 netisr_dispatch(NETISR_IP, m);
187 #endif /* defined(BSD) */