1246 lines
22 KiB
C
1246 lines
22 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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* Virtual Channel Manager
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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.h>
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#include <netatm/ipatm/ipatm_var.h>
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#include <netatm/ipatm/ipatm_serv.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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Atm_attributes ipatm_aal5llc = {
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NULL, /* nif */
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CMAPI_CPCS, /* api */
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0, /* api_init */
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0, /* headin */
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0, /* headout */
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{ /* aal */
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T_ATM_PRESENT,
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ATM_AAL5
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},
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{ /* traffic */
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T_ATM_PRESENT,
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{
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{
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T_ATM_ABSENT,
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0,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_NO
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},
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{
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T_ATM_ABSENT,
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0,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_NO
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},
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T_YES
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},
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},
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{ /* bearer */
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T_ATM_PRESENT,
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{
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T_ATM_CLASS_X,
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T_ATM_NULL,
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T_ATM_NULL,
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T_NO,
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T_ATM_1_TO_1
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}
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},
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{ /* bhli */
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T_ATM_ABSENT
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},
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{ /* blli */
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T_ATM_PRESENT,
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T_ATM_ABSENT,
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{
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{
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T_ATM_SIMPLE_ID,
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},
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{
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T_ATM_ABSENT
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}
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}
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},
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{ /* llc */
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T_ATM_PRESENT,
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{
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T_ATM_LLC_SHARING,
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IPATM_LLC_LEN,
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IPATM_LLC_HDR
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}
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},
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{ /* called */
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T_ATM_PRESENT,
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},
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{ /* calling */
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T_ATM_ABSENT
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},
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{ /* qos */
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T_ATM_PRESENT,
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{
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T_ATM_NETWORK_CODING,
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{
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T_ATM_QOS_CLASS_0,
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},
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{
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T_ATM_QOS_CLASS_0
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}
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}
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},
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{ /* transit */
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T_ATM_ABSENT
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},
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{ /* cause */
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T_ATM_ABSENT
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}
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};
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Atm_attributes ipatm_aal5null = {
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NULL, /* nif */
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CMAPI_CPCS, /* api */
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0, /* api_init */
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sizeof(struct ifnet *), /* headin */
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0, /* headout */
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{ /* aal */
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T_ATM_PRESENT,
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ATM_AAL5
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},
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{ /* traffic */
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T_ATM_PRESENT,
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{
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{
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T_ATM_ABSENT,
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0,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_NO
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},
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{
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T_ATM_ABSENT,
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0,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_NO
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},
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T_YES
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},
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},
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{ /* bearer */
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T_ATM_PRESENT,
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{
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T_ATM_CLASS_X,
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T_ATM_NULL,
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T_ATM_NULL,
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T_NO,
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T_ATM_1_TO_1
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}
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},
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{ /* bhli */
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T_ATM_ABSENT
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},
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{ /* blli */
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T_ATM_ABSENT,
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T_ATM_ABSENT
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},
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{ /* llc */
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T_ATM_ABSENT
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},
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{ /* called */
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T_ATM_PRESENT,
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},
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{ /* calling */
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T_ATM_ABSENT
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},
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{ /* qos */
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T_ATM_PRESENT,
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{
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T_ATM_NETWORK_CODING,
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{
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T_ATM_QOS_CLASS_0,
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},
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{
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T_ATM_QOS_CLASS_0
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}
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}
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},
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{ /* transit */
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T_ATM_ABSENT
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},
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{ /* cause */
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T_ATM_ABSENT
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}
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};
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Atm_attributes ipatm_aal4null = {
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NULL, /* nif */
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CMAPI_CPCS, /* api */
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0, /* api_init */
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sizeof(struct ifnet *), /* headin */
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0, /* headout */
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{ /* aal */
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T_ATM_PRESENT,
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ATM_AAL3_4
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},
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{ /* traffic */
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T_ATM_PRESENT,
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{
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{
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T_ATM_ABSENT,
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0,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_NO
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},
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{
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T_ATM_ABSENT,
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0,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_ATM_ABSENT,
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T_NO
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},
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T_YES
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},
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},
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{ /* bearer */
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T_ATM_PRESENT,
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{
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T_ATM_CLASS_X,
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T_ATM_NULL,
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T_ATM_NULL,
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T_NO,
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T_ATM_1_TO_1
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}
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},
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{ /* bhli */
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T_ATM_ABSENT
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},
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{ /* blli */
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T_ATM_ABSENT,
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T_ATM_ABSENT
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},
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{ /* llc */
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T_ATM_ABSENT
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},
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{ /* called */
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T_ATM_PRESENT,
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},
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{ /* calling */
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T_ATM_ABSENT
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},
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{ /* qos */
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T_ATM_PRESENT,
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{
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T_ATM_NETWORK_CODING,
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{
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T_ATM_QOS_CLASS_0,
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},
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{
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T_ATM_QOS_CLASS_0
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}
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}
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},
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{ /* transit */
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T_ATM_ABSENT
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},
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{ /* cause */
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T_ATM_ABSENT
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}
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};
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static struct t_atm_cause ipatm_cause = {
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T_ATM_ITU_CODING,
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T_ATM_LOC_USER,
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0,
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{0, 0, 0, 0}
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};
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/*
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* Open an IP PVC
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*
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* This function will perform all actions necessary to activate a
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* PVC for IP usage. In particular, it will allocate control blocks,
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* open the PVC, initialize PVC stack, and initiate whatever ARP
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* procedures are required.
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*
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* Arguments:
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* pvp pointer to PVC parameter structure
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* sivp address to return pointer to IP PVC control block
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*
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* Returns:
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* 0 PVC was successfully opened
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* errno open failed - reason indicated
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*
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*/
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int
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ipatm_openpvc(pvp, sivp)
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struct ipatmpvc *pvp;
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struct ipvcc **sivp;
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{
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struct ipvcc *ivp;
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Atm_attributes *ap;
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Atm_addr_pvc *pvcp;
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struct atm_nif *nip;
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struct ip_nif *inp;
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int s, err = 0;
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inp = pvp->ipp_ipnif;
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nip = inp->inf_nif;
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/*
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* Make sure interface is ready to go
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*/
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if (inp->inf_state != IPNIF_ACTIVE) {
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err = ENETDOWN;
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goto done;
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}
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/*
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* Validate fixed destination IP address
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*/
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if (pvp->ipp_dst.sin_addr.s_addr != INADDR_ANY) {
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#if (defined(BSD) && (BSD >= 199306))
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if (in_broadcast(pvp->ipp_dst.sin_addr, &nip->nif_if) ||
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#else
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if (in_broadcast(pvp->ipp_dst.sin_addr) ||
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#endif
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IN_MULTICAST(ntohl(pvp->ipp_dst.sin_addr.s_addr)) ||
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ipatm_chknif(pvp->ipp_dst.sin_addr, inp)) {
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err = EINVAL;
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goto done;
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}
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}
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/*
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* Allocate IP VCC block
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*/
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ivp = (struct ipvcc *)atm_allocate(&ipatm_vcpool);
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if (ivp == NULL) {
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err = ENOMEM;
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goto done;
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}
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/*
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* Initialize the PVC
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*/
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ivp->iv_flags = IVF_PVC;
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if (pvp->ipp_encaps == ATM_ENC_LLC)
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ivp->iv_flags |= IVF_LLC;
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/*
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* Fill out connection attributes
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*/
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if (pvp->ipp_aal == ATM_AAL5) {
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if (pvp->ipp_encaps == ATM_ENC_LLC)
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ap = &ipatm_aal5llc;
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else
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ap = &ipatm_aal5null;
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} else {
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ap = &ipatm_aal4null;
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}
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ap->nif = nip;
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ap->traffic.v.forward.PCR_all_traffic = nip->nif_pif->pif_pcr;
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ap->traffic.v.backward.PCR_all_traffic = nip->nif_pif->pif_pcr;
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ap->called.addr.address_format = T_ATM_PVC_ADDR;
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ap->called.addr.address_length = sizeof(Atm_addr_pvc);
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pvcp = (Atm_addr_pvc *)ap->called.addr.address;
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ATM_PVC_SET_VPI(pvcp, pvp->ipp_vpi);
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ATM_PVC_SET_VCI(pvcp, pvp->ipp_vci);
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ap->called.subaddr.address_format = T_ATM_ABSENT;
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ap->called.subaddr.address_length = 0;
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|
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/*
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* Create PVC
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*/
|
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err = atm_cm_connect(&ipatm_endpt, ivp, ap, &ivp->iv_conn);
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if (err) {
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atm_free((caddr_t)ivp);
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goto done;
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}
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|
|
|
/*
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|
* Save PVC information and link in VCC
|
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*/
|
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/* ivp->iv_ = ap->headout; */
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/*
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* Queue VCC onto its network interface
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*/
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s = splnet();
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ipatm_vccnt++;
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ENQUEUE(ivp, struct ipvcc, iv_elem, inp->inf_vcq);
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ivp->iv_ipnif = inp;
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(void) splx(s);
|
|
|
|
/*
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|
* Set destination IP address and IPVCC state
|
|
*/
|
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if (pvp->ipp_dst.sin_addr.s_addr == INADDR_ANY) {
|
|
/*
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* Initiate ARP processing
|
|
*/
|
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switch ((*inp->inf_serv->is_arp_pvcopen)(ivp)) {
|
|
|
|
case MAP_PROCEEDING:
|
|
/*
|
|
* Wait for answer
|
|
*/
|
|
ivp->iv_state = IPVCC_ACTIVE;
|
|
break;
|
|
|
|
case MAP_VALID:
|
|
/*
|
|
* We've got our answer already
|
|
*/
|
|
ivp->iv_state = IPVCC_ACTIVE;
|
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ivp->iv_flags |= IVF_MAPOK;
|
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ivp->iv_dst.s_addr = ivp->iv_arpent->am_dstip.s_addr;
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break;
|
|
|
|
case MAP_FAILED:
|
|
/*
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* Try again later
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|
*/
|
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ivp->iv_state = IPVCC_ACTPENT;
|
|
IPVCC_TIMER(ivp, 1 * ATM_HZ);
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break;
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|
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default:
|
|
panic("ipatm_openpvc: invalid arp_pvcopen return");
|
|
}
|
|
|
|
} else {
|
|
/*
|
|
* Use configured IP destination
|
|
*/
|
|
ivp->iv_dst.s_addr = pvp->ipp_dst.sin_addr.s_addr;
|
|
ivp->iv_state = IPVCC_ACTIVE;
|
|
ivp->iv_flags |= IVF_MAPOK;
|
|
}
|
|
|
|
done:
|
|
if (err)
|
|
*sivp = NULL;
|
|
else
|
|
*sivp = ivp;
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Create an IP SVC
|
|
*
|
|
* This function will initiate the creation of an IP SVC. The IP VCC
|
|
* control block will be initialized and, if required, we will initiate
|
|
* ARP processing in order to resolve the destination's ATM address. Once
|
|
* the destination ATM address is known, ipatm_opensvc() will be called.
|
|
*
|
|
* Arguments:
|
|
* ifp pointer to destination ifnet structure
|
|
* daf destination address family type
|
|
* dst pointer to destination address
|
|
* sivp address to return pointer to IP SVC control block
|
|
*
|
|
* Returns:
|
|
* 0 SVC creation was successfully initiated
|
|
* errno creation failed - reason indicated
|
|
*
|
|
*/
|
|
int
|
|
ipatm_createsvc(ifp, daf, dst, sivp)
|
|
struct ifnet *ifp;
|
|
u_short daf;
|
|
caddr_t dst;
|
|
struct ipvcc **sivp;
|
|
{
|
|
struct atm_nif *nip = (struct atm_nif *)ifp;
|
|
struct ip_nif *inp;
|
|
struct ipvcc *ivp;
|
|
struct in_addr *ip;
|
|
Atm_addr *atm;
|
|
int s, err = 0;
|
|
|
|
/*
|
|
* Get IP interface and make sure its ready
|
|
*/
|
|
for (inp = ipatm_nif_head; inp; inp = inp->inf_next) {
|
|
if (inp->inf_nif == nip)
|
|
break;
|
|
}
|
|
if (inp == NULL) {
|
|
err = ENXIO;
|
|
goto done;
|
|
}
|
|
if (inp->inf_state != IPNIF_ACTIVE) {
|
|
err = ENETDOWN;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Validate destination address
|
|
*/
|
|
if (daf == AF_INET) {
|
|
/*
|
|
* Destination is IP address
|
|
*/
|
|
ip = (struct in_addr *)dst;
|
|
atm = NULL;
|
|
if (ip->s_addr == INADDR_ANY) {
|
|
err = EADDRNOTAVAIL;
|
|
goto done;
|
|
}
|
|
} else if (daf == AF_ATM) {
|
|
/*
|
|
* Destination is ATM address
|
|
*/
|
|
atm = (Atm_addr *)dst;
|
|
ip = NULL;
|
|
if (atm->address_format == T_ATM_ABSENT) {
|
|
err = EINVAL;
|
|
goto done;
|
|
}
|
|
} else {
|
|
err = EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Make sure we have services provider and ARP support
|
|
*/
|
|
if ((inp->inf_serv == NULL) ||
|
|
(inp->inf_serv->is_arp_svcout == NULL)) {
|
|
err = ENETDOWN;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Allocate IP VCC
|
|
*/
|
|
ivp = (struct ipvcc *)atm_allocate(&ipatm_vcpool);
|
|
if (ivp == NULL) {
|
|
err = ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Initialize SVC
|
|
*/
|
|
ivp->iv_flags = IVF_SVC;
|
|
ivp->iv_ipnif = inp;
|
|
|
|
/*
|
|
* Get destination ATM address
|
|
*/
|
|
if (daf == AF_INET) {
|
|
/*
|
|
* ARP is the way...
|
|
*/
|
|
ivp->iv_dst.s_addr = ip->s_addr;
|
|
|
|
switch ((*inp->inf_serv->is_arp_svcout)(ivp, ip)) {
|
|
|
|
case MAP_PROCEEDING:
|
|
/*
|
|
* Wait for answer
|
|
*/
|
|
ivp->iv_state = IPVCC_PMAP;
|
|
IPVCC_TIMER(ivp, IPATM_ARP_TIME);
|
|
break;
|
|
|
|
case MAP_VALID:
|
|
/*
|
|
* We've got our answer already, so open SVC
|
|
*/
|
|
ivp->iv_flags |= IVF_MAPOK;
|
|
err = ipatm_opensvc(ivp);
|
|
if (err) {
|
|
(*inp->inf_serv->is_arp_close)(ivp);
|
|
atm_free((caddr_t)ivp);
|
|
goto done;
|
|
}
|
|
break;
|
|
|
|
case MAP_FAILED:
|
|
/*
|
|
* So sorry...come again
|
|
*/
|
|
atm_free((caddr_t)ivp);
|
|
err = ENETDOWN;
|
|
goto done;
|
|
|
|
default:
|
|
panic("ipatm_createsvc: invalid arp_svcout return");
|
|
}
|
|
} else {
|
|
/*
|
|
* We were given the ATM address, so open the SVC
|
|
*
|
|
* Create temporary arp map entry so that opensvc() works.
|
|
* Caller must set up a permanent entry immediately! (yuk)
|
|
*/
|
|
struct arpmap map;
|
|
|
|
ATM_ADDR_COPY(atm, &map.am_dstatm);
|
|
map.am_dstatmsub.address_format = T_ATM_ABSENT;
|
|
map.am_dstatmsub.address_length = 0;
|
|
ivp->iv_arpent = ↦
|
|
err = ipatm_opensvc(ivp);
|
|
if (err) {
|
|
atm_free((caddr_t)ivp);
|
|
goto done;
|
|
}
|
|
ivp->iv_arpent = NULL;
|
|
}
|
|
|
|
/*
|
|
* Queue VCC onto its network interface
|
|
*/
|
|
s = splnet();
|
|
ipatm_vccnt++;
|
|
ENQUEUE(ivp, struct ipvcc, iv_elem, inp->inf_vcq);
|
|
(void) splx(s);
|
|
|
|
done:
|
|
if (err)
|
|
*sivp = NULL;
|
|
else
|
|
*sivp = ivp;
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Open an IP SVC
|
|
*
|
|
* This function will continue the IP SVC creation process. Here, we
|
|
* will issue an SVC open to the signalling manager and then wait for
|
|
* the final SVC setup results.
|
|
*
|
|
* Arguments:
|
|
* ivp pointer to IP SVC to open
|
|
*
|
|
* Returns:
|
|
* 0 SVC open was successfully initiated
|
|
* errno open failed - reason indicated
|
|
*
|
|
*/
|
|
int
|
|
ipatm_opensvc(ivp)
|
|
struct ipvcc *ivp;
|
|
{
|
|
struct ip_nif *inp = ivp->iv_ipnif;
|
|
Atm_attributes *ap;
|
|
int err = 0, i;
|
|
|
|
/*
|
|
* Cancel possible arp timeout
|
|
*/
|
|
IPVCC_CANCEL(ivp);
|
|
|
|
/*
|
|
* Fill out connection attributes
|
|
*/
|
|
i = ivp->iv_parmx;
|
|
if (inp->inf_serv->is_vccparm[i].ivc_aal == ATM_AAL5) {
|
|
if (inp->inf_serv->is_vccparm[i].ivc_encaps == ATM_ENC_LLC) {
|
|
ap = &ipatm_aal5llc;
|
|
ivp->iv_flags |= IVF_LLC;
|
|
} else {
|
|
ap = &ipatm_aal5null;
|
|
ivp->iv_flags &= ~IVF_LLC;
|
|
}
|
|
} else {
|
|
ap = &ipatm_aal4null;
|
|
ivp->iv_flags &= ~IVF_LLC;
|
|
}
|
|
|
|
ap->nif = inp->inf_nif;
|
|
ap->traffic.v.forward.PCR_all_traffic = inp->inf_nif->nif_pif->pif_pcr;
|
|
ap->traffic.v.backward.PCR_all_traffic = inp->inf_nif->nif_pif->pif_pcr;
|
|
|
|
ATM_ADDR_COPY(&ivp->iv_arpent->am_dstatm, &ap->called.addr);
|
|
ATM_ADDR_COPY(&ivp->iv_arpent->am_dstatmsub, &ap->called.subaddr);
|
|
|
|
/*
|
|
* Initiate SVC open
|
|
*/
|
|
err = atm_cm_connect(&ipatm_endpt, ivp, ap, &ivp->iv_conn);
|
|
switch (err) {
|
|
|
|
case EINPROGRESS:
|
|
/*
|
|
* Call is progressing
|
|
*/
|
|
/* ivp->iv_ = ap->headout; */
|
|
|
|
/*
|
|
* Now we just wait for a CALL_CONNECTED event
|
|
*/
|
|
ivp->iv_state = IPVCC_POPEN;
|
|
IPVCC_TIMER(ivp, IPATM_SVC_TIME);
|
|
err = 0;
|
|
break;
|
|
|
|
case 0:
|
|
/*
|
|
* We've been hooked up with a shared VCC
|
|
*/
|
|
/* ivp->iv_ = ap->headout; */
|
|
ipatm_activate(ivp);
|
|
break;
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Retry an IP SVC Open
|
|
*
|
|
* This function will attempt to retry a failed SVC open request. The IP
|
|
* interface service provider specifies a list of possible VCC parameters
|
|
* for IP to use. We will try each set of parameters in turn until either
|
|
* an open succeeds or we reach the end of the list.
|
|
*
|
|
* Arguments:
|
|
* ivp pointer to IP SVC
|
|
*
|
|
* Returns:
|
|
* 0 SVC (re)open was successfully initiated
|
|
* else retry failed
|
|
*
|
|
*/
|
|
int
|
|
ipatm_retrysvc(ivp)
|
|
struct ipvcc *ivp;
|
|
{
|
|
struct ip_nif *inp = ivp->iv_ipnif;
|
|
|
|
/*
|
|
* If there isn't another set of vcc parameters to try, return
|
|
*/
|
|
if ((++ivp->iv_parmx >= IPATM_VCCPARMS) ||
|
|
(inp->inf_serv->is_vccparm[ivp->iv_parmx].ivc_aal == 0))
|
|
return (1);
|
|
|
|
/*
|
|
* Okay, now initiate open with a new set of parameters
|
|
*/
|
|
return (ipatm_opensvc(ivp));
|
|
}
|
|
|
|
|
|
/*
|
|
* Finish IP SVC Activation
|
|
*
|
|
* Arguments:
|
|
* ivp pointer to IP SVC
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
ipatm_activate(ivp)
|
|
struct ipvcc *ivp;
|
|
{
|
|
|
|
/*
|
|
* Connection is now active
|
|
*/
|
|
ivp->iv_state = IPVCC_ACTIVE;
|
|
IPVCC_CANCEL(ivp);
|
|
|
|
/*
|
|
* Tell ARP module that connection is active
|
|
*/
|
|
if ((*ivp->iv_ipnif->inf_serv->is_arp_svcact)(ivp)) {
|
|
(void) ipatm_closevc(ivp, T_ATM_CAUSE_TEMPORARY_FAILURE);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Send any queued packet
|
|
*/
|
|
if ((ivp->iv_flags & IVF_MAPOK) && ivp->iv_queue) {
|
|
struct sockaddr_in sin;
|
|
struct ifnet *ifp;
|
|
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_addr.s_addr = ivp->iv_dst.s_addr;
|
|
ifp = (struct ifnet *)ivp->iv_ipnif->inf_nif;
|
|
(void) ipatm_ifoutput(ifp, ivp->iv_queue,
|
|
(struct sockaddr *)&sin);
|
|
ivp->iv_queue = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Process Incoming Calls
|
|
*
|
|
* This function will receive control when an incoming call has been matched
|
|
* to one of our registered listen parameter blocks. Assuming the call passes
|
|
* acceptance criteria and all required resources are available, we will
|
|
* create an IP SVC and notify the connection manager of our decision. We
|
|
* will then await notification of the final SVC setup results. If any
|
|
* problems are encountered, we will just tell the connection manager to
|
|
* reject the call.
|
|
*
|
|
* Called at splnet.
|
|
*
|
|
* Arguments:
|
|
* tok owner's matched listening token
|
|
* cop pointer to incoming call's connection block
|
|
* ap pointer to incoming call's attributes
|
|
* tokp pointer to location to store our connection token
|
|
*
|
|
* Returns:
|
|
* 0 call is accepted
|
|
* errno call rejected - reason indicated
|
|
*
|
|
*/
|
|
int
|
|
ipatm_incoming(tok, cop, ap, tokp)
|
|
void *tok;
|
|
Atm_connection *cop;
|
|
Atm_attributes *ap;
|
|
void **tokp;
|
|
{
|
|
struct atm_nif *nip = ap->nif;
|
|
struct ip_nif *inp;
|
|
struct ipvcc *ivp = NULL;
|
|
int err, cause;
|
|
int usellc = 0, mtu = ATM_NIF_MTU;
|
|
|
|
/*
|
|
* Get IP interface and make sure its ready
|
|
*/
|
|
for (inp = ipatm_nif_head; inp; inp = inp->inf_next) {
|
|
if (inp->inf_nif == nip)
|
|
break;
|
|
}
|
|
if ((inp == NULL) || (inp->inf_state != IPNIF_ACTIVE)) {
|
|
err = ENETUNREACH;
|
|
cause = T_ATM_CAUSE_SERVICE_OR_OPTION_UNAVAILABLE;
|
|
goto reject;
|
|
}
|
|
|
|
/*
|
|
* Make sure we have services provider and ARP support
|
|
*/
|
|
if ((inp->inf_serv == NULL) ||
|
|
(inp->inf_serv->is_arp_svcin == NULL)) {
|
|
err = ENETUNREACH;
|
|
cause = T_ATM_CAUSE_SERVICE_OR_OPTION_UNAVAILABLE;
|
|
goto reject;
|
|
}
|
|
|
|
/*
|
|
* Check for LLC encapsulation
|
|
*/
|
|
if ((ap->blli.tag_l2 == T_ATM_PRESENT) &&
|
|
(ap->blli.v.layer_2_protocol.ID_type == T_ATM_SIMPLE_ID) &&
|
|
(ap->blli.v.layer_2_protocol.ID.simple_ID == T_ATM_BLLI2_I8802)) {
|
|
usellc = 1;
|
|
mtu += IPATM_LLC_LEN;
|
|
}
|
|
|
|
/*
|
|
* Verify requested MTU
|
|
*/
|
|
if (ap->aal.type == ATM_AAL5) {
|
|
if ((ap->aal.v.aal5.forward_max_SDU_size > mtu) ||
|
|
(ap->aal.v.aal5.backward_max_SDU_size < mtu)) {
|
|
err = ENETUNREACH;
|
|
cause = T_ATM_CAUSE_AAL_PARAMETERS_NOT_SUPPORTED;
|
|
goto reject;
|
|
}
|
|
} else {
|
|
if ((ap->aal.v.aal4.forward_max_SDU_size > mtu) ||
|
|
(ap->aal.v.aal4.backward_max_SDU_size < mtu)) {
|
|
err = ENETUNREACH;
|
|
cause = T_ATM_CAUSE_AAL_PARAMETERS_NOT_SUPPORTED;
|
|
goto reject;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocate IP VCC
|
|
*/
|
|
ivp = (struct ipvcc *)atm_allocate(&ipatm_vcpool);
|
|
if (ivp == NULL) {
|
|
err = ENOMEM;
|
|
cause = T_ATM_CAUSE_UNSPECIFIED_RESOURCE_UNAVAILABLE;
|
|
goto reject;
|
|
}
|
|
|
|
/*
|
|
* Initialize SVC
|
|
*/
|
|
ivp->iv_flags = IVF_SVC;
|
|
ivp->iv_ipnif = inp;
|
|
if (usellc)
|
|
ivp->iv_flags |= IVF_LLC;
|
|
|
|
/*
|
|
* Lookup ARP entry for destination
|
|
*/
|
|
switch ((*inp->inf_serv->is_arp_svcin)
|
|
(ivp, &ap->calling.addr, &ap->calling.subaddr)) {
|
|
|
|
case MAP_PROCEEDING:
|
|
/*
|
|
* We'll be (hopefully) notified later
|
|
*/
|
|
break;
|
|
|
|
case MAP_VALID:
|
|
/*
|
|
* We've got our answer already
|
|
*/
|
|
ivp->iv_flags |= IVF_MAPOK;
|
|
ivp->iv_dst.s_addr = ivp->iv_arpent->am_dstip.s_addr;
|
|
break;
|
|
|
|
case MAP_FAILED:
|
|
/*
|
|
* So sorry...come again
|
|
*/
|
|
err = ENETUNREACH;
|
|
cause = T_ATM_CAUSE_SERVICE_OR_OPTION_UNAVAILABLE;
|
|
goto reject;
|
|
|
|
default:
|
|
panic("ipatm_incoming: invalid arp_svcin return");
|
|
}
|
|
|
|
/*
|
|
* Accept SVC connection
|
|
*/
|
|
ivp->iv_state = IPVCC_PACCEPT;
|
|
|
|
/*
|
|
* Save VCC information
|
|
*/
|
|
ivp->iv_conn = cop;
|
|
*tokp = ivp;
|
|
/* ivp->iv_ = ap->headout; */
|
|
|
|
/*
|
|
* Queue VCC onto its network interface
|
|
*/
|
|
ipatm_vccnt++;
|
|
ENQUEUE(ivp, struct ipvcc, iv_elem, inp->inf_vcq);
|
|
|
|
/*
|
|
* Wait for a CALL_CONNECTED event
|
|
*/
|
|
IPVCC_TIMER(ivp, IPATM_SVC_TIME);
|
|
|
|
return (0);
|
|
|
|
reject:
|
|
/*
|
|
* Clean up after call failure
|
|
*/
|
|
if (ivp) {
|
|
(*inp->inf_serv->is_arp_close)(ivp);
|
|
atm_free((caddr_t)ivp);
|
|
}
|
|
ap->cause.tag = T_ATM_PRESENT;
|
|
ap->cause.v = ipatm_cause;
|
|
ap->cause.v.cause_value = cause;
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Close an IP VCC
|
|
*
|
|
* This function will close an IP VCC (PVC or SVC), including notifying
|
|
* the signalling and ARP subsystems of the VCC's demise and cleaning
|
|
* up memory after ourselves.
|
|
*
|
|
* Arguments:
|
|
* ivp pointer to VCC
|
|
* code cause code
|
|
*
|
|
* Returns:
|
|
* 0 VCC successfully closed
|
|
* errno close failed - reason indicated
|
|
*
|
|
*/
|
|
int
|
|
ipatm_closevc(ivp, code)
|
|
struct ipvcc *ivp;
|
|
int code;
|
|
{
|
|
struct ip_nif *inp = ivp->iv_ipnif;
|
|
int s, err;
|
|
|
|
/*
|
|
* Make sure VCC hasn't been through here already
|
|
*/
|
|
switch (ivp->iv_state) {
|
|
|
|
case IPVCC_FREE:
|
|
return (EALREADY);
|
|
}
|
|
|
|
/*
|
|
* Reset lookup cache
|
|
*/
|
|
if (last_map_ipvcc == ivp) {
|
|
last_map_ipvcc = NULL;
|
|
last_map_ipdst = 0;
|
|
}
|
|
|
|
/*
|
|
* Tell ARP about SVCs and dynamic PVCs
|
|
*/
|
|
if (inp->inf_serv &&
|
|
((ivp->iv_flags & IVF_SVC) || inp->inf_serv->is_arp_pvcopen)) {
|
|
(*inp->inf_serv->is_arp_close)(ivp);
|
|
}
|
|
|
|
/*
|
|
* Free queued packets
|
|
*/
|
|
if (ivp->iv_queue)
|
|
KB_FREEALL(ivp->iv_queue);
|
|
|
|
/*
|
|
* Cancel any timers
|
|
*/
|
|
IPVCC_CANCEL(ivp);
|
|
|
|
/*
|
|
* Close VCC
|
|
*/
|
|
switch (ivp->iv_state) {
|
|
|
|
case IPVCC_PMAP:
|
|
break;
|
|
|
|
case IPVCC_POPEN:
|
|
case IPVCC_PACCEPT:
|
|
case IPVCC_ACTPENT:
|
|
case IPVCC_ACTIVE:
|
|
ipatm_cause.cause_value = code;
|
|
err = atm_cm_release(ivp->iv_conn, &ipatm_cause);
|
|
if (err) {
|
|
log(LOG_ERR,
|
|
"ipatm_closevc: release fail: err=%d\n", err);
|
|
}
|
|
break;
|
|
|
|
case IPVCC_CLOSED:
|
|
break;
|
|
|
|
default:
|
|
log(LOG_ERR,
|
|
"ipatm_closevc: unknown state: ivp=%p, state=%d\n",
|
|
ivp, ivp->iv_state);
|
|
}
|
|
|
|
/*
|
|
* Remove VCC from network i/f
|
|
*/
|
|
s = splnet();
|
|
DEQUEUE(ivp, struct ipvcc, iv_elem, inp->inf_vcq);
|
|
|
|
/*
|
|
* Reset state just to be sure
|
|
*/
|
|
ivp->iv_state = IPVCC_FREE;
|
|
|
|
/*
|
|
* If ARP module is done with VCC too, then free it
|
|
*/
|
|
if (ivp->iv_arpconn == NULL)
|
|
atm_free((caddr_t)ivp);
|
|
ipatm_vccnt--;
|
|
(void) splx(s);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Check if IP address is valid on a Network Interface
|
|
*
|
|
* Checks whether the supplied IP address is allowed to be assigned to
|
|
* the supplied IP network interface.
|
|
*
|
|
* Arguments:
|
|
* in IP address
|
|
* inp pointer to IP network interface
|
|
*
|
|
* Returns:
|
|
* 0 - OK to assign
|
|
* 1 - not valid to assign
|
|
*
|
|
*/
|
|
int
|
|
ipatm_chknif(in, inp)
|
|
struct in_addr in;
|
|
struct ip_nif *inp;
|
|
{
|
|
struct in_ifaddr *ia;
|
|
u_long i;
|
|
|
|
/*
|
|
* Make sure there's an interface requested
|
|
*/
|
|
if (inp == NULL)
|
|
return (1);
|
|
|
|
/*
|
|
* Make sure we have an IP address
|
|
*/
|
|
i = ntohl(in.s_addr);
|
|
if (i == 0)
|
|
return (1);
|
|
|
|
/*
|
|
* Make sure an interface address is set
|
|
*/
|
|
ia = inp->inf_addr;
|
|
if (ia == NULL)
|
|
return (1);
|
|
|
|
/*
|
|
* Make sure we're on the right subnet
|
|
*/
|
|
if ((i & ia->ia_subnetmask) != ia->ia_subnet)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Map an IP Address to an IP VCC
|
|
*
|
|
* Given a destination IP address, this function will return a pointer
|
|
* to the appropriate output IP VCC to which to send the packet.
|
|
* This is currently implemented using a one-behind cache containing the
|
|
* last successful mapping result. If the cache lookup fails, then a
|
|
* simple linear search of all IP VCCs on the destination network interface
|
|
* is performed. This is obviously an area to look at for performance
|
|
* improvements.
|
|
*
|
|
* Arguments:
|
|
* dst pointer to destination IP address
|
|
* nip pointer to destination network interface
|
|
*
|
|
* Returns:
|
|
* addr pointer to located IP VCC
|
|
* 0 no such mapping exists
|
|
*
|
|
*/
|
|
struct ipvcc *
|
|
ipatm_iptovc(dst, nip)
|
|
struct sockaddr_in *dst;
|
|
struct atm_nif *nip;
|
|
{
|
|
struct ip_nif *inp;
|
|
struct ipvcc *ivp;
|
|
u_long dstip = dst->sin_addr.s_addr;
|
|
int s;
|
|
|
|
/*
|
|
* Look in cache first
|
|
*/
|
|
if (last_map_ipdst == dstip)
|
|
return (last_map_ipvcc);
|
|
|
|
/*
|
|
* Oh well, we've got to search for it...first find the interface
|
|
*/
|
|
s = splnet();
|
|
for (inp = ipatm_nif_head; inp; inp = inp->inf_next) {
|
|
if (inp->inf_nif == nip)
|
|
break;
|
|
}
|
|
if (inp == NULL) {
|
|
(void) splx(s);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Now home in on the VCC
|
|
*/
|
|
for (ivp = Q_HEAD(inp->inf_vcq, struct ipvcc); ivp;
|
|
ivp = Q_NEXT(ivp, struct ipvcc, iv_elem)) {
|
|
if (ivp->iv_dst.s_addr == dstip)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Update lookup cache
|
|
*/
|
|
if (ivp) {
|
|
last_map_ipdst = dstip;
|
|
last_map_ipvcc = ivp;
|
|
}
|
|
(void) splx(s);
|
|
|
|
return (ivp);
|
|
}
|
|
|