FreeBSD-5.3/usr.sbin/atm/scspd/scsp_config.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.
*
* @(#) $FreeBSD: src/usr.sbin/atm/scspd/scsp_config.c,v 1.5 2002/10/10 00:32:55 alfred Exp $
*
*/
/*
* Server Cache Synchronization Protocol (SCSP) Support
* ----------------------------------------------------
*
* Configuration file processing
*
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_ioctl.h>
#include <errno.h>
#include <libatm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "scsp_msg.h"
#include "scsp_if.h"
#include "scsp_var.h"
#ifndef lint
__RCSID("@(#) $FreeBSD: src/usr.sbin/atm/scspd/scsp_config.c,v 1.5 2002/10/10 00:32:55 alfred Exp $");
#endif
extern int yyparse(void);
/*
* Global variables
*/
FILE *cfg_file;
Scsp_server *current_server;
Scsp_dcs *current_dcs;
/*
* Process the configuration file
*
* This routine is called when the daemon starts, and it can also be
* called while it is running, as the result of a SIGHUP signal. It
* therefore has to be capable of both configuring the daemon from
* scratch and modifying the configuration of a running daemon.
*
* Arguments:
* cfn configuration file name
*
* Returns:
* 0 configuration read with no errors
* else error found in configuration file
*
*/
int
scsp_config(cfn)
char *cfn;
{
int rc;
Scsp_server *ssp, *snext;
/*
* Open the configuration file
*/
cfg_file = fopen(cfn, "r");
if (!cfg_file) {
scsp_log(LOG_ERR, "can't open config file %s",
(void *)cfn);
exit(1);
}
/*
* Initialize current interface pointer
*/
current_server = (Scsp_server *)0;
/*
* Clear marks on any existing servers
*/
for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
ssp->ss_mark = 0;
}
/*
* Scan the configuration file, processing each line as
* it is read
*/
rc = yyparse();
/*
* Close the configuration file
*/
fclose(cfg_file);
/*
* Delete any server entries that weren't updated
*/
for (ssp = scsp_server_head; ssp; ssp = snext) {
snext = ssp->ss_next;
if (!ssp->ss_mark)
scsp_server_delete(ssp);
}
return(rc);
}
/*
* Prepare for SCSP DCS setup
*
* This routine is called from yyparse() when a DCS command is found.
*
* Arguments:
* none
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
start_dcs()
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
/*
* Allocate a DCS block
*/
dcsp = calloc(1, sizeof(Scsp_dcs));
if (dcsp == NULL)
scsp_mem_err("start_dcs: sizeof(Scsp_dcs)");
/*
* Fill out DCS links and default values
*/
dcsp->sd_server = current_server;
dcsp->sd_addr.address_format = T_ATM_ABSENT;
dcsp->sd_subaddr.address_format = T_ATM_ABSENT;
dcsp->sd_sock = -1;
dcsp->sd_ca_rexmt_int = SCSP_CAReXmitInterval;
dcsp->sd_csus_rexmt_int = SCSP_CSUSReXmitInterval;
dcsp->sd_hops = SCSP_CSA_HOP_CNT;
dcsp->sd_csu_rexmt_int = SCSP_CSUReXmitInterval;
dcsp->sd_csu_rexmt_max = SCSP_CSUReXmitMax;
LINK2TAIL(dcsp, Scsp_dcs, current_server->ss_dcs, sd_next);
current_dcs = dcsp;
return(0);
}
/*
* Finish up server configuration
*
* This routine is called from yyparse() to at the end of a DCS
* command. It checks that required fields are set and finishes
* up the DCS block.
*
* Arguments:
* none
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
finish_dcs()
{
int rc = 0;
Scsp_dcs *dcsp;
Scsp_server *ssp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
ssp = current_server;
dcsp = current_dcs;
/*
* Make sure the DCS ID is set
*/
if (dcsp->sd_dcsid.id_len == 0) {
parse_error("DCS ID not set");
rc++;
}
/*
* Make sure the ATM address is set
*/
if (dcsp->sd_addr.address_format == T_ATM_ABSENT) {
parse_error("DCS ATM address not set");
rc++;
}
current_dcs = (Scsp_dcs *)0;
return(rc);
}
/*
* Configure DCS ATM address
*
* This routine is called from yyparse() to process an ATMaddr command.
*
* Arguments:
* ap pointer to DCS's ATM address (in ASCII)
* sap pointer to DCS's ATM subaddress (in ASCII)
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_addr(ap, sap)
char *ap, *sap;
{
Scsp_dcs *dcsp;
Atm_addr addr, subaddr;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Initialize
*/
bzero(&addr, sizeof(addr));
addr.address_format = T_ATM_ABSENT;
bzero(&subaddr, sizeof(subaddr));
subaddr.address_format = T_ATM_ABSENT;
/*
* Convert the ATM address from character to internal format
*/
if (ap) {
addr.address_length = get_hex_atm_addr(ap,
(u_char *)addr.address, strlen(ap));
if (addr.address_length == 0) {
parse_error("invalid ATM address");
return(1);
}
if (addr.address_length == sizeof(Atm_addr_nsap)) {
addr.address_format = T_ATM_ENDSYS_ADDR;
} else if (addr.address_length <=
sizeof(Atm_addr_e164)) {
addr.address_format = T_ATM_E164_ADDR;
} else {
parse_error("invalid ATM address");
return(1);
}
}
/*
* Convert the ATM subaddress from character to internal format
*/
if (sap) {
subaddr.address_length = get_hex_atm_addr(sap,
(u_char *)subaddr.address, strlen(sap));
if (subaddr.address_length == 0) {
parse_error("invalid ATM address");
return(1);
}
if (subaddr.address_length == sizeof(Atm_addr_nsap)) {
subaddr.address_format = T_ATM_ENDSYS_ADDR;
} else if (subaddr.address_length <=
sizeof(Atm_addr_e164)) {
subaddr.address_format = T_ATM_E164_ADDR;
} else {
parse_error("invalid ATM subaddress");
return(1);
}
}
/*
* Make sure we have a legal ATM address type combination
*/
if (((addr.address_format != T_ATM_ENDSYS_ADDR) ||
(subaddr.address_format != T_ATM_ABSENT)) &&
((addr.address_format != T_ATM_E164_ADDR) ||
(subaddr.address_format != T_ATM_ENDSYS_ADDR))) {
parse_error("invalid address/subaddress combination");
return(1);
}
/*
* Save the address and subaddress
*/
ATM_ADDR_COPY(&addr, &dcsp->sd_addr);
ATM_ADDR_COPY(&subaddr, &dcsp->sd_subaddr);
return(0);
}
/*
* Configure CA retransmit interval for DCS
*
* This routine is called from yyparse() to process a CAReXmitInt
* command.
*
* Arguments:
* val time interval
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_ca_rexmit(val)
int val;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the interval
*/
if (val <= 0 || val > 1024) {
parse_error("invalid CA retransmit interval");
return(1);
}
/*
* Set CA retransmit interval
*/
dcsp->sd_ca_rexmt_int = val;
return(0);
}
/*
* Configure CSUS retransmit interval for DCS
*
* This routine is called from yyparse() to process a CSUSReXmitInt
* command.
*
* Arguments:
* val time interval
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_csus_rexmit(val)
int val;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the interval
*/
if (val <= 0 || val > 1024) {
parse_error("invalid CSUS retransmit interval");
return(1);
}
/*
* Set CSUS retransmit interval
*/
dcsp->sd_csus_rexmt_int = val;
return(0);
}
/*
* Configure CSU retransmit interval for DCS
*
* This routine is called from yyparse() to process a CSUReXmitInt
* command.
*
* Arguments:
* val time interval
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_csu_rexmit(val)
int val;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the interval
*/
if (val <= 0 || val > 1024) {
parse_error("invalid CSU retransmit interval");
return(1);
}
/*
* Set CSU retransmit interval
*/
dcsp->sd_csu_rexmt_int = val;
return(0);
}
/*
* Configure CSU retransmit limit for DCS
*
* This routine is called from yyparse() to process a CSUReXmitMax
* command.
*
* Arguments:
* val time interval
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_csu_rexmit_max(val)
int val;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the interval
*/
if (val <= 0 || val > 1024) {
parse_error("invalid CSU retransmit maximum");
return(1);
}
/*
* Set CSU retransmit limit
*/
dcsp->sd_csu_rexmt_max = val;
return(0);
}
/*
* Configure Hello dead factor for DCS
*
* This routine is called from yyparse() to process a HelloDead
* command.
*
* Arguments:
* val number of times Hello interval has to expire before
* a DCS is considered dead
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_hello_df(val)
int val;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the limit
*/
if (val <= 0 || val > 1024) {
parse_error("invalid Hello dead factor");
return(1);
}
/*
* Set Hello dead factor
*/
dcsp->sd_hello_df = val;
return(0);
}
/*
* Configure Hello interval for DCS
*
* This routine is called from yyparse() to process a HelloInt
* command.
*
* Arguments:
* val time interval
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_hello_int(val)
int val;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the interval
*/
if (val <= 0 || val > 1024) {
parse_error("invalid Hello interval");
return(1);
}
/*
* Set Hello interval
*/
dcsp->sd_hello_int = val;
return(0);
}
/*
* Configure hop count for SCSP server
*
* This routine is called from yyparse() to process a Hops command.
*
* Arguments:
* hops number of hops
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_hops(hops)
int hops;
{
Scsp_dcs *dcsp;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
dcsp = current_dcs;
/*
* Validate the count
*/
if (hops <= 0 || hops > 1024) {
parse_error("invalid hop count");
return(1);
}
/*
* Set hop count
*/
dcsp->sd_hops = hops;
return(0);
}
/*
* Configure DCS ID
*
* This routine is called from yyparse() to process an ID command.
*
* Arguments:
* name pointer to DCS's DNS name or IP address (in ASCII)
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_dcs_id(name)
char *name;
{
Scsp_dcs *dcsp;
Scsp_server *ssp;
struct sockaddr_in *ip_addr;
/*
* Make sure we have a current server block and DCS block
*/
if (!current_server) {
parse_error("server not found");
return(1);
}
if (!current_dcs) {
parse_error("server not found");
return(1);
}
ssp = current_server;
dcsp = current_dcs;
/*
* Convert the DNS name or IP address
*/
ip_addr = get_ip_addr(name);
if (!ip_addr) {
parse_error("invalid DCS IP address");
return(1);
}
/*
* Verify the address length
*/
if (ssp->ss_id_len != sizeof(ip_addr->sin_addr)) {
parse_error("invalid DCS ID length");
return(1);
}
/*
* Set the ID in the DCS block
*/
dcsp->sd_dcsid.id_len = ssp->ss_id_len;
bcopy(&ip_addr->sin_addr, dcsp->sd_dcsid.id, ssp->ss_id_len);
return(0);
}
/*
* Configure network interface for SCSP server
*
* This routine is called from yyparse() to process a Netif command.
* It verifies the network interface name, gets interface information
* from the kernel, and sets the appropriate fields in the server
* control block.
*
* Arguments:
* netif pointer to network interface name
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_intf(netif)
char *netif;
{
int rc;
Scsp_server *ssp;
/*
* Get the current network interface address
*/
ssp = current_server;
if (!ssp) {
parse_error("Server not found");
rc = 1;
goto set_intf_done;
}
/*
* Make sure we're configuring a valid
* network interface
*/
rc = verify_nif_name(netif);
if (rc == 0) {
parse_error("%s is not a valid network interface",
(void *)netif);
rc = 1;
goto set_intf_done;
} else if (rc < 0) {
scsp_log(LOG_ERR, "Netif name verify error");
exit(1);
}
/*
* Save the server's network interface name
*/
strcpy(ssp->ss_intf, netif);
rc = 0;
set_intf_done:
return(rc);
}
/*
* Configure protocol for SCSP server
*
* This routine is called from yyparse() to process a Protocol command.
*
* Arguments:
* proto SCSP protocol being configured
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_protocol(proto)
int proto;
{
Scsp_server *ssp;
/*
* Get address of current server block
*/
ssp = current_server;
if (!ssp) {
parse_error("server not found");
return(1);
}
/*
* Process based on protocol ID
*/
switch(proto) {
case SCSP_PROTO_ATMARP:
ssp->ss_pid = proto;
ssp->ss_id_len = SCSP_ATMARP_ID_LEN;
ssp->ss_ckey_len = SCSP_ATMARP_KEY_LEN;
break;
case SCSP_PROTO_NHRP:
ssp->ss_pid = proto;
ssp->ss_id_len = SCSP_NHRP_ID_LEN;
ssp->ss_ckey_len = SCSP_NHRP_KEY_LEN;
break;
case SCSP_PROTO_MARS:
case SCSP_PROTO_DHCP:
case SCSP_PROTO_LNNI:
default:
parse_error("invalid protocol");
return(1);
}
return(0);
}
/*
* Configure server group for SCSP server
*
* This routine is called from yyparse() to process a ServerGroupID
* command.
*
* Arguments:
* sgid server group id
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_server_group(sgid)
int sgid;
{
Scsp_server *ssp;
/*
* Get address of current server block
*/
ssp = current_server;
if (!ssp) {
parse_error("server not found");
return(1);
}
/*
* Validate server group ID
*/
if (sgid <= 0) {
parse_error("invalid server group ID");
return(1);
}
/*
* Save the ID
*/
ssp->ss_sgid = sgid;
return(0);
}
/*
* Prepare for SCSP server setup
*
* This routine is called from yyparse() when a Server statment is
* found.
*
* Arguments:
* name pointer to LIS name
*
* Returns:
* 0 success
* else error encountered
*
*/
int
start_server(name)
char *name;
{
int i;
Scsp_server *ssp;
Scsp_dcs *dcsp, *next_dcs;
Scsp_cse *csep, *next_cse;
/*
* See if we already have an entry for this name
*/
for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
if (strcasecmp(ssp->ss_name, name) == 0)
break;
}
if (ssp) {
/*
* Log the fact that we're updating the entry
*/
scsp_log(LOG_INFO, "updating server entry for %s",
(void *)name);
/*
* Free the existing cache
*/
for (i = 0; i < SCSP_HASHSZ; i++) {
for (csep = ssp->ss_cache[i]; csep;
csep = next_cse) {
next_cse = csep->sc_next;
UNLINK(csep, Scsp_cse, ssp->ss_cache[i],
sc_next);
free(csep);
}
}
/*
* Delete existing DCS blocks
*/
for (dcsp = ssp->ss_dcs; dcsp; dcsp = next_dcs) {
next_dcs = dcsp->sd_next;
scsp_dcs_delete(dcsp);
}
} else {
/*
* Get a new server entry
*/
ssp = calloc(1, sizeof(Scsp_server));
if (ssp == NULL) {
scsp_log(LOG_ERR, "unable to allocate server entry");
exit(1);
}
ssp->ss_sock = -1;
ssp->ss_dcs_lsock = -1;
/*
* Set the name
*/
ssp->ss_name = strdup(name);
/*
* Link in the new interface entry
*/
LINK2TAIL(ssp, Scsp_server, scsp_server_head,
ss_next);
}
/*
* If the mark is already set, this is a duplicate command
*/
if (ssp->ss_mark) {
parse_error("duplicate server \"%s\"", name);
return(1);
}
/*
* Make this the current interface
*/
current_server = ssp;
return(0);
}
/*
* Finish up server configuration
*
* This routine is called from yyparse() when the end of a server
* statement is reached. It checks that required fields are set
* and marks the entry as processed.
*
* Arguments:
* None
*
* Returns:
* 0 OK
* 1 Error
*
*/
int
finish_server()
{
int rc = 0;
Scsp_server *ssp;
/*
* Get the current network interface address
*/
ssp = current_server;
if (!ssp) {
parse_error("Server not found");
rc++;
}
/*
* Mark the interface as processed
*/
ssp->ss_mark = 1;
/*
* Make sure the interface has been configured
*/
if (ssp->ss_intf == (char *)0) {
parse_error("netif missing from server specification");
rc++;
}
/*
* Make sure the protocol is set
*/
if (ssp->ss_pid == 0) {
parse_error("protocol missing from server specification");
rc++;
}
/*
* Make sure the server group is set
*/
if (ssp->ss_sgid == 0) {
parse_error("server group ID missing from server specification");
rc++;
}
/*
* Make sure at least one DCS is configured
*/
if (ssp->ss_dcs == (Scsp_dcs *)0) {
parse_error("no DCS configured for server");
rc++;
}
/*
* Mark the end of the server
*/
current_server = (Scsp_server *)0;
return(rc);
}
/*
* Configure log file for SCSP server
*
* This routine is called from yyparse() to process a log File command.
*
* Arguments:
* file name of logging file
*
* Returns:
* 0 success
* 1 error encountered
*
*/
int
set_log_file(file)
char *file;
{
/*
* Make sure we haven't already got a log file
*/
if (scsp_log_file) {
parse_error("multiple log files specified");
return(1);
}
/*
* Open the file
*/
scsp_log_file = fopen(file, "a");
if (!scsp_log_file) {
parse_error("can't open log file");
return(1);
}
return(0);
}