336 lines
6.2 KiB
C
336 lines
6.2 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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* @(#) $Id: ipatm_if.c,v 1.1 1998/09/15 08:23:00 phk Exp $
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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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* Interface 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("@(#) $Id: ipatm_if.c,v 1.1 1998/09/15 08:23:00 phk Exp $");
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#endif
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/*
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* Local functions
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*/
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static void ipatm_closenif __P((struct ip_nif *));
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/*
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* Process Network Interface status change
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*
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* Called whenever a network interface status change is requested.
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*
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* Called at splnet.
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*
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* Arguments:
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* cmd command code
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* nip pointer to atm network interface control block
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* arg command specific parameter
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*
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* Returns:
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* 0 command successful
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* errno command failed - reason indicated
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*
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*/
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int
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ipatm_nifstat(cmd, nip, arg)
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int cmd;
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struct atm_nif *nip;
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int arg;
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{
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struct in_ifaddr *ia;
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struct siginst *sip;
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struct ip_nif *inp;
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int err = 0;
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/*
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* Look for corresponding IP interface
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*/
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for (inp = ipatm_nif_head; inp; inp = inp->inf_next) {
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if (inp->inf_nif == nip)
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break;
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}
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/*
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* Process command
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*/
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switch (cmd) {
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case NCM_ATTACH:
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/*
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* Make sure i/f isn't already attached
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*/
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if (inp != NULL) {
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err = EEXIST;
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break;
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}
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/*
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* Get a new interface block
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*/
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inp = (struct ip_nif *)atm_allocate(&ipatm_nifpool);
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if (inp == NULL) {
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err = ENOMEM;
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break;
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}
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inp->inf_nif = nip;
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inp->inf_state = IPNIF_ADDR;
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inp->inf_arpnotify = ipatm_arpnotify;
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inp->inf_ipinput = ipatm_ipinput;
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inp->inf_createsvc = ipatm_createsvc;
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LINK2TAIL(inp, struct ip_nif, ipatm_nif_head, inf_next);
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break;
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case NCM_DETACH:
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/*
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* Make sure i/f is attached
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*/
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if (inp == NULL) {
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err = ENODEV;
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break;
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}
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/*
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* Validate interface stuff
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*/
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if (Q_HEAD(inp->inf_vcq, struct ipvcc))
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panic("ipatm_nifstat: ipvcc queue not empty");
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/*
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* If we're active, close all our VCCs and tell the
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* interface service about the deactivation
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*/
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if (inp->inf_state == IPNIF_ACTIVE) {
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ipatm_closenif(inp);
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if (inp->inf_serv)
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(void) (*inp->inf_serv->is_ifdact)(inp);
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}
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/*
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* Clean up and free block
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*/
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UNLINK(inp, struct ip_nif, ipatm_nif_head, inf_next);
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atm_free((caddr_t)inp);
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break;
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case NCM_SETADDR:
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/*
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* We only care about IP addresses
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*/
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#if (defined(BSD) && (BSD >= 199103))
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if (((struct ifaddr *)arg)->ifa_addr->sa_family != AF_INET)
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#else
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if (((struct ifaddr *)arg)->ifa_addr.sa_family != AF_INET)
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#endif
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break;
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/*
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* Make sure i/f is there
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*/
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ia = (struct in_ifaddr *)arg;
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if (inp == NULL)
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panic("ipatm_nifstat: setaddr missing ip_nif");
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/*
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* Process new address
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*/
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switch (inp->inf_state) {
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case IPNIF_SIGMGR:
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case IPNIF_ADDR:
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inp->inf_addr = ia;
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/*
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* If signalling manager is not set, wait for it
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*/
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sip = nip->nif_pif->pif_siginst;
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if (sip == NULL) {
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inp->inf_state = IPNIF_SIGMGR;
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break;
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}
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/*
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* Otherwise, everything's set
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*/
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inp->inf_state = IPNIF_ACTIVE;
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/*
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* Tell interface service we're around
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*/
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if (sip->si_ipserv) {
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inp->inf_serv = sip->si_ipserv;
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err = (*inp->inf_serv->is_ifact)(inp);
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}
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/*
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* Reset state if there's been a problem
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*/
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if (err) {
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inp->inf_serv = NULL;
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inp->inf_addr = NULL;
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inp->inf_state = IPNIF_ADDR;
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}
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break;
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case IPNIF_ACTIVE:
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/*
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* We dont support an address change
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*/
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err = EEXIST;
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break;
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}
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break;
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case NCM_SIGATTACH:
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/*
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* Make sure i/f is attached
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*/
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if (inp == NULL) {
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err = ENODEV;
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break;
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}
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/*
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* Are we waiting for the sigmgr attach??
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*/
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if (inp->inf_state != IPNIF_SIGMGR) {
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/*
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* No, nothing else to do
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*/
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break;
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}
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/*
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* OK, everything's set
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*/
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inp->inf_state = IPNIF_ACTIVE;
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/*
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* Tell interface service we're around
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*/
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sip = nip->nif_pif->pif_siginst;
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if (sip->si_ipserv) {
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inp->inf_serv = sip->si_ipserv;
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err = (*inp->inf_serv->is_ifact)(inp);
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}
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/*
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* Just report any problems, since a NCM_SIGDETACH will
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* be coming down immediately
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*/
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break;
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case NCM_SIGDETACH:
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/*
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* Make sure i/f is attached
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*/
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if (inp == NULL) {
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err = ENODEV;
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break;
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}
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/*
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* Are we currently active??
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*/
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if (inp->inf_state != IPNIF_ACTIVE) {
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/*
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* No, nothing else to do
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*/
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break;
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}
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/*
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* Close all the IP VCCs for this interface
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*/
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ipatm_closenif(inp);
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/*
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* Tell interface service that i/f has gone down
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*/
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if (inp->inf_serv)
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(void) (*inp->inf_serv->is_ifdact)(inp);
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/*
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* Just have to wait for another sigattach
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*/
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inp->inf_serv = NULL;
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inp->inf_state = IPNIF_SIGMGR;
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break;
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default:
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log(LOG_ERR, "ipatm_nifstat: unknown command %d\n", cmd);
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}
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return (err);
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}
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/*
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* Close all VCCs on a Network Interface
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*
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* Called at splnet.
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*
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* Arguments:
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* inp pointer to IP network interface
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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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static void
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ipatm_closenif(inp)
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struct ip_nif *inp;
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{
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struct ipvcc *ivp, *inext;
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/*
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* Close each IP VCC on this interface
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*/
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for (ivp = Q_HEAD(inp->inf_vcq, struct ipvcc); ivp; ivp = inext) {
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inext = Q_NEXT(ivp, struct ipvcc, iv_elem);
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(void) ipatm_closevc(ivp, T_ATM_CAUSE_UNSPECIFIED_NORMAL);
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}
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}
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