FreeBSD-5.3/sys/netatm/uni/uniarp_output.c
/*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*/
/*
* ATM Forum UNI Support
* ---------------------
*
* UNI ATMARP support (RFC1577) - Output packet processing
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/netatm/uni/uniarp_output.c,v 1.9 2003/06/11 07:22:30 obrien Exp $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_sigmgr.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
#include <netatm/ipatm/ipatm_var.h>
#include <netatm/ipatm/ipatm_serv.h>
#include <netatm/uni/uniip_var.h>
/*
* Issue an ATMARP Request PDU
*
* Arguments:
* uip pointer to IP interface
* tip pointer to target IP address
*
* Returns:
* 0 PDU was successfully sent
* else unable to send PDU
*
*/
int
uniarp_arp_req(uip, tip)
struct uniip *uip;
struct in_addr *tip;
{
KBuffer *m;
struct atmarp_hdr *ahp;
struct atm_nif *nip;
struct ip_nif *inp;
struct ipvcc *ivp;
struct siginst *sip;
char *cp;
int len, err;
inp = uip->uip_ipnif;
nip = inp->inf_nif;
sip = inp->inf_nif->nif_pif->pif_siginst;
/*
* Figure out how long pdu is going to be
*/
len = sizeof(struct atmarp_hdr) + (2 * sizeof(struct in_addr));
switch (sip->si_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
len += sip->si_addr.address_length;
break;
case T_ATM_E164_ADDR:
len += sip->si_addr.address_length;
if (sip->si_subaddr.address_format == T_ATM_ENDSYS_ADDR)
len += sip->si_subaddr.address_length;
break;
}
/*
* Get a buffer for pdu
*/
KB_ALLOCPKT(m, len, KB_F_NOWAIT, KB_T_DATA);
if (m == NULL)
return (1);
/*
* Place aligned pdu at end of buffer
*/
KB_TAILALIGN(m, len);
KB_DATASTART(m, ahp, struct atmarp_hdr *);
/*
* Setup variable fields pointer
*/
cp = (char *)ahp + sizeof(struct atmarp_hdr);
/*
* Build fields
*/
ahp->ah_hrd = htons(ARP_ATMFORUM);
ahp->ah_pro = htons(ETHERTYPE_IP);
len = sip->si_addr.address_length;
switch (sip->si_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_shtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(sip->si_addr.address, cp, len - 1);
((struct atm_addr_nsap *)cp)->aan_sel = nip->nif_sel;
cp += len;
ahp->ah_sstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_shtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(sip->si_addr.address, cp, len);
cp += len;
if (sip->si_subaddr.address_format == T_ATM_ENDSYS_ADDR) {
len = sip->si_subaddr.address_length;
ahp->ah_sstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_ssa */
bcopy(sip->si_subaddr.address, cp, len - 1);
((struct atm_addr_nsap *)cp)->aan_sel = nip->nif_sel;
cp += len;
} else
ahp->ah_sstl = 0;
break;
default:
ahp->ah_shtl = 0;
ahp->ah_sstl = 0;
}
ahp->ah_op = htons(ARP_REQUEST);
ahp->ah_spln = sizeof(struct in_addr);
/* ah_spa */
bcopy((caddr_t)&(IA_SIN(inp->inf_addr)->sin_addr), cp,
sizeof(struct in_addr));
cp += sizeof(struct in_addr);
ahp->ah_thtl = 0;
ahp->ah_tstl = 0;
ahp->ah_tpln = sizeof(struct in_addr);
/* ah_tpa */
bcopy((caddr_t)tip, cp, sizeof(struct in_addr));
/*
* Finally, send the pdu to the ATMARP server
*/
ivp = uip->uip_arpsvrvcc;
if (uniarp_print)
uniarp_pdu_print(ivp, m, "send");
err = atm_cm_cpcs_data(ivp->iv_arpconn, m);
if (err) {
/*
* Didn't make it
*/
KB_FREEALL(m);
return (1);
}
return (0);
}
/*
* Issue an ATMARP Response PDU
*
* Arguments:
* uip pointer to IP interface
* amp pointer to source map entry
* tip pointer to target IP address
* tatm pointer to target ATM address
* tsub pointer to target ATM subaddress
* ivp pointer to vcc over which to send pdu
*
* Returns:
* 0 PDU was successfully sent
* else unable to send PDU
*
*/
int
uniarp_arp_rsp(uip, amp, tip, tatm, tsub, ivp)
struct uniip *uip;
struct arpmap *amp;
struct in_addr *tip;
Atm_addr *tatm;
Atm_addr *tsub;
struct ipvcc *ivp;
{
KBuffer *m;
struct atmarp_hdr *ahp;
char *cp;
int len, err;
/*
* Figure out how long pdu is going to be
*/
len = sizeof(struct atmarp_hdr) + (2 * sizeof(struct in_addr));
switch (amp->am_dstatm.address_format) {
case T_ATM_ENDSYS_ADDR:
len += amp->am_dstatm.address_length;
break;
case T_ATM_E164_ADDR:
len += amp->am_dstatm.address_length;
if (amp->am_dstatmsub.address_format == T_ATM_ENDSYS_ADDR)
len += amp->am_dstatmsub.address_length;
break;
}
switch (tatm->address_format) {
case T_ATM_ENDSYS_ADDR:
len += tatm->address_length;
break;
case T_ATM_E164_ADDR:
len += tatm->address_length;
if (tsub->address_format == T_ATM_ENDSYS_ADDR)
len += tsub->address_length;
break;
}
/*
* Get a buffer for pdu
*/
KB_ALLOCPKT(m, len, KB_F_NOWAIT, KB_T_DATA);
if (m == NULL)
return (1);
/*
* Place aligned pdu at end of buffer
*/
KB_TAILALIGN(m, len);
KB_DATASTART(m, ahp, struct atmarp_hdr *);
/*
* Setup variable fields pointer
*/
cp = (char *)ahp + sizeof(struct atmarp_hdr);
/*
* Build fields
*/
ahp->ah_hrd = htons(ARP_ATMFORUM);
ahp->ah_pro = htons(ETHERTYPE_IP);
len = amp->am_dstatm.address_length;
switch (amp->am_dstatm.address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_shtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(amp->am_dstatm.address, cp, len);
cp += len;
ahp->ah_sstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_shtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(amp->am_dstatm.address, cp, len);
cp += len;
if (amp->am_dstatmsub.address_format == T_ATM_ENDSYS_ADDR) {
len = amp->am_dstatmsub.address_length;
ahp->ah_sstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_ssa */
bcopy(amp->am_dstatmsub.address, cp, len);
cp += len;
} else
ahp->ah_sstl = 0;
break;
default:
ahp->ah_shtl = 0;
ahp->ah_sstl = 0;
}
ahp->ah_op = htons(ARP_REPLY);
ahp->ah_spln = sizeof(struct in_addr);
/* ah_spa */
bcopy((caddr_t)&->am_dstip, cp, sizeof(struct in_addr));
cp += sizeof(struct in_addr);
len = tatm->address_length;
switch (tatm->address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_thtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_tha */
bcopy(tatm->address, cp, len);
cp += len;
ahp->ah_tstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_thtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_tha */
bcopy(tatm->address, cp, len);
cp += len;
if (tsub->address_format == T_ATM_ENDSYS_ADDR) {
len = tsub->address_length;
ahp->ah_tstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_tsa */
bcopy(tsub->address, cp, len);
cp += len;
} else
ahp->ah_tstl = 0;
break;
default:
ahp->ah_thtl = 0;
ahp->ah_tstl = 0;
}
ahp->ah_tpln = sizeof(struct in_addr);
/* ah_tpa */
bcopy((caddr_t)tip, cp, sizeof(struct in_addr));
/*
* Finally, send the pdu to the vcc peer
*/
if (uniarp_print)
uniarp_pdu_print(ivp, m, "send");
err = atm_cm_cpcs_data(ivp->iv_arpconn, m);
if (err) {
/*
* Didn't make it
*/
KB_FREEALL(m);
return (1);
}
return (0);
}
/*
* Issue an ATMARP NAK PDU
*
* Arguments:
* uip pointer to IP interface
* m pointer to ATMARP_REQ buffer chain
* ivp pointer to vcc over which to send pdu
*
* Returns:
* 0 PDU was successfully sent
* else unable to send PDU
*
*/
int
uniarp_arp_nak(uip, m, ivp)
struct uniip *uip;
KBuffer *m;
struct ipvcc *ivp;
{
struct atmarp_hdr *ahp;
int err;
/*
* Get the fixed fields together
*/
if (KB_LEN(m) < sizeof(struct atmarp_hdr)) {
KB_PULLUP(m, sizeof(struct atmarp_hdr), m);
if (m == NULL)
return (1);
}
KB_DATASTART(m, ahp, struct atmarp_hdr *);
/*
* Set new op-code
*/
ahp->ah_op = htons(ARP_NAK);
/*
* Finally, send the pdu to the vcc peer
*/
if (uniarp_print)
uniarp_pdu_print(ivp, m, "send");
err = atm_cm_cpcs_data(ivp->iv_arpconn, m);
if (err) {
/*
* Didn't make it
*/
KB_FREEALL(m);
return (1);
}
return (0);
}
/*
* Issue an InATMARP Request PDU
*
* Arguments:
* uip pointer to IP interface
* tatm pointer to target ATM address
* tsub pointer to target ATM subaddress
* ivp pointer to vcc over which to send pdu
*
* Returns:
* 0 PDU was successfully sent
* else unable to send PDU
*
*/
int
uniarp_inarp_req(uip, tatm, tsub, ivp)
struct uniip *uip;
Atm_addr *tatm;
Atm_addr *tsub;
struct ipvcc *ivp;
{
KBuffer *m;
struct atmarp_hdr *ahp;
struct atm_nif *nip;
struct ip_nif *inp;
struct siginst *sip;
char *cp;
int len, err;
inp = uip->uip_ipnif;
nip = inp->inf_nif;
sip = inp->inf_nif->nif_pif->pif_siginst;
/*
* Figure out how long pdu is going to be
*/
len = sizeof(struct atmarp_hdr) + sizeof(struct in_addr);
switch (sip->si_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
len += sip->si_addr.address_length;
break;
case T_ATM_E164_ADDR:
len += sip->si_addr.address_length;
if (sip->si_subaddr.address_format == T_ATM_ENDSYS_ADDR)
len += sip->si_subaddr.address_length;
break;
}
switch (tatm->address_format) {
case T_ATM_ENDSYS_ADDR:
len += tatm->address_length;
break;
case T_ATM_E164_ADDR:
len += tatm->address_length;
if (tsub->address_format == T_ATM_ENDSYS_ADDR)
len += tsub->address_length;
break;
}
/*
* Get a buffer for pdu
*/
KB_ALLOCPKT(m, len, KB_F_NOWAIT, KB_T_DATA);
if (m == NULL)
return (1);
/*
* Place aligned pdu at end of buffer
*/
KB_TAILALIGN(m, len);
KB_DATASTART(m, ahp, struct atmarp_hdr *);
/*
* Setup variable fields pointer
*/
cp = (char *)ahp + sizeof(struct atmarp_hdr);
/*
* Build fields
*/
ahp->ah_hrd = htons(ARP_ATMFORUM);
ahp->ah_pro = htons(ETHERTYPE_IP);
len = sip->si_addr.address_length;
switch (sip->si_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_shtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(sip->si_addr.address, cp, len - 1);
((struct atm_addr_nsap *)cp)->aan_sel = nip->nif_sel;
cp += len;
ahp->ah_sstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_shtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(sip->si_addr.address, cp, len);
cp += len;
if (sip->si_subaddr.address_format == T_ATM_ENDSYS_ADDR) {
len = sip->si_subaddr.address_length;
ahp->ah_sstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_ssa */
bcopy(sip->si_subaddr.address, cp, len - 1);
((struct atm_addr_nsap *)cp)->aan_sel = nip->nif_sel;
cp += len;
} else
ahp->ah_sstl = 0;
break;
default:
ahp->ah_shtl = 0;
ahp->ah_sstl = 0;
}
ahp->ah_op = htons(INARP_REQUEST);
ahp->ah_spln = sizeof(struct in_addr);
/* ah_spa */
bcopy((caddr_t)&(IA_SIN(inp->inf_addr)->sin_addr), cp,
sizeof(struct in_addr));
cp += sizeof(struct in_addr);
len = tatm->address_length;
switch (tatm->address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_thtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_tha */
bcopy(tatm->address, cp, len);
cp += len;
ahp->ah_tstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_thtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_tha */
bcopy(tatm->address, cp, len);
cp += len;
if (tsub->address_format == T_ATM_ENDSYS_ADDR) {
len = tsub->address_length;
ahp->ah_tstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_tsa */
bcopy(tsub->address, cp, len);
cp += len;
} else
ahp->ah_tstl = 0;
break;
default:
ahp->ah_thtl = 0;
ahp->ah_tstl = 0;
}
ahp->ah_tpln = 0;
/*
* Finally, send the pdu to the vcc peer
*/
if (uniarp_print)
uniarp_pdu_print(ivp, m, "send");
err = atm_cm_cpcs_data(ivp->iv_arpconn, m);
if (err) {
/*
* Didn't make it
*/
KB_FREEALL(m);
return (1);
}
return (0);
}
/*
* Issue an InATMARP Response PDU
*
* Arguments:
* uip pointer to IP interface
* tip pointer to target IP address
* tatm pointer to target ATM address
* tsub pointer to target ATM subaddress
* ivp pointer to vcc over which to send pdu
*
* Returns:
* 0 PDU was successfully sent
* else unable to send PDU
*
*/
int
uniarp_inarp_rsp(uip, tip, tatm, tsub, ivp)
struct uniip *uip;
struct in_addr *tip;
Atm_addr *tatm;
Atm_addr *tsub;
struct ipvcc *ivp;
{
KBuffer *m;
struct atmarp_hdr *ahp;
struct atm_nif *nip;
struct ip_nif *inp;
struct siginst *sip;
char *cp;
int len, err;
inp = uip->uip_ipnif;
nip = inp->inf_nif;
sip = inp->inf_nif->nif_pif->pif_siginst;
/*
* Figure out how long pdu is going to be
*/
len = sizeof(struct atmarp_hdr) + (2 * sizeof(struct in_addr));
switch (sip->si_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
len += sip->si_addr.address_length;
break;
case T_ATM_E164_ADDR:
len += sip->si_addr.address_length;
if (sip->si_subaddr.address_format == T_ATM_ENDSYS_ADDR)
len += sip->si_subaddr.address_length;
break;
}
switch (tatm->address_format) {
case T_ATM_ENDSYS_ADDR:
len += tatm->address_length;
break;
case T_ATM_E164_ADDR:
len += tatm->address_length;
if (tsub->address_format == T_ATM_ENDSYS_ADDR)
len += tsub->address_length;
break;
}
/*
* Get a buffer for pdu
*/
KB_ALLOCPKT(m, len, KB_F_NOWAIT, KB_T_DATA);
if (m == NULL)
return (1);
/*
* Place aligned pdu at end of buffer
*/
KB_TAILALIGN(m, len);
KB_DATASTART(m, ahp, struct atmarp_hdr *);
/*
* Setup variable fields pointer
*/
cp = (char *)ahp + sizeof(struct atmarp_hdr);
/*
* Build fields
*/
ahp->ah_hrd = htons(ARP_ATMFORUM);
ahp->ah_pro = htons(ETHERTYPE_IP);
len = sip->si_addr.address_length;
switch (sip->si_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_shtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(sip->si_addr.address, cp, len - 1);
((struct atm_addr_nsap *)cp)->aan_sel = nip->nif_sel;
cp += len;
ahp->ah_sstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_shtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_sha */
bcopy(sip->si_addr.address, cp, len);
cp += len;
if (sip->si_subaddr.address_format == T_ATM_ENDSYS_ADDR) {
len = sip->si_subaddr.address_length;
ahp->ah_sstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_ssa */
bcopy(sip->si_subaddr.address, cp, len - 1);
((struct atm_addr_nsap *)cp)->aan_sel = nip->nif_sel;
cp += len;
} else
ahp->ah_sstl = 0;
break;
default:
ahp->ah_shtl = 0;
ahp->ah_sstl = 0;
}
ahp->ah_op = htons(INARP_REPLY);
ahp->ah_spln = sizeof(struct in_addr);
/* ah_spa */
bcopy((caddr_t)&(IA_SIN(inp->inf_addr)->sin_addr), cp,
sizeof(struct in_addr));
cp += sizeof(struct in_addr);
len = tatm->address_length;
switch (tatm->address_format) {
case T_ATM_ENDSYS_ADDR:
ahp->ah_thtl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_tha */
bcopy(tatm->address, cp, len);
cp += len;
ahp->ah_tstl = 0;
break;
case T_ATM_E164_ADDR:
ahp->ah_thtl = ARP_TL_E164 | (len & ARP_TL_LMASK);
/* ah_tha */
bcopy(tatm->address, cp, len);
cp += len;
if (tsub->address_format == T_ATM_ENDSYS_ADDR) {
len = tsub->address_length;
ahp->ah_tstl = ARP_TL_NSAPA | (len & ARP_TL_LMASK);
/* ah_tsa */
bcopy(tsub->address, cp, len);
cp += len;
} else
ahp->ah_tstl = 0;
break;
default:
ahp->ah_thtl = 0;
ahp->ah_tstl = 0;
}
ahp->ah_tpln = sizeof(struct in_addr);
/* ah_tpa */
bcopy((caddr_t)tip, cp, sizeof(struct in_addr));
/*
* Finally, send the pdu to the vcc peer
*/
if (uniarp_print)
uniarp_pdu_print(ivp, m, "send");
err = atm_cm_cpcs_data(ivp->iv_arpconn, m);
if (err) {
/*
* Didn't make it
*/
KB_FREEALL(m);
return (1);
}
return (0);
}