FreeBSD-5.3/lib/libatm/ioctl_subr.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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libatm/ioctl_subr.c,v 1.11 2004/02/21 16:29:10 harti Exp $");
/*
* User Space Library Functions
* ----------------------------
*
* IOCTL subroutines
*
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netatm/port.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 <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libatm.h"
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
extern char *prog;
/*
* Issue an informational IOCTL
*
* The user fills out the opcode and any subtype information. This
* routine will allocate a buffer and issue the IOCTL. If the request
* fails because the buffer wasn't big enough, this routine will double
* the buffer size and retry the request repeatedly. The buffer must
* be freed by the caller.
*
* Arguments:
* req pointer to an ATM information request IOCTL structure
* buf_len length of buffer to be allocated
*
* Returns:
* -1 error encountered (reason in errno)
* int length of the returned VCC information
*
*/
ssize_t
do_info_ioctl(struct atminfreq *req, size_t buf_len)
{
int rc, s;
caddr_t buf;
/*
* Open a socket for the IOCTL
*/
s = socket(AF_ATM, SOCK_DGRAM, 0);
if (s < 0) {
return(-1);
}
/*
* Get memory for returned information
*/
mem_retry:
buf = malloc(buf_len);
if (buf == NULL) {
errno = ENOMEM;
return(-1);
}
bzero(buf, buf_len);
/*
* Set the buffer address and length in the request
*/
req->air_buf_addr = buf;
req->air_buf_len = buf_len;
/*
* Issue the IOCTL
*/
rc = ioctl(s, AIOCINFO, (caddr_t)req);
if (rc) {
free(buf);
if (errno == ENOSPC) {
buf_len = buf_len * 2;
goto mem_retry;
}
return(-1);
}
(void)close(s);
/*
* Set a pointer to the returned info in the request
* and return its length
*/
req->air_buf_addr = buf;
return(req->air_buf_len);
}
/*
* Get VCC information
*
* Arguments:
* intf pointer to interface name (or null string)
* vccp pointer to a pointer to a struct air_vcc_rsp for the
* address of the returned VCC information
*
* Returns:
* int length of the retuned VCC information
*
*/
ssize_t
get_vcc_info(const char *intf, struct air_vcc_rsp **vccp)
{
size_t buf_len = sizeof(struct air_vcc_rsp) * 100;
struct atminfreq air;
/*
* Initialize IOCTL request
*/
air.air_opcode = AIOCS_INF_VCC;
bzero(air.air_vcc_intf, sizeof(air.air_vcc_intf));
if (intf != NULL && strlen(intf) != 0)
strncpy(air.air_vcc_intf, intf, IFNAMSIZ - 1);
buf_len = do_info_ioctl(&air, buf_len);
/*
* Return a pointer to the VCC info and its length
*/
*vccp = (struct air_vcc_rsp *)(void *)air.air_buf_addr;
return(buf_len);
}
/*
* Get subnet mask
*
* Arguments:
* intf pointer to an interface name
* mask pointer to a struct sockaddr_in to receive the mask
*
* Returns:
* 0 good completion
* -1 error
*
*/
int
get_subnet_mask(const char *intf, struct sockaddr_in *mask)
{
int rc, s;
struct ifreq req;
struct sockaddr_in *ip_mask;
/*
* Check parameters
*/
if (!intf || !mask ||
strlen(intf) == 0 ||
strlen(intf) > IFNAMSIZ-1)
return(-1);
/*
* Open a socket for the IOCTL
*/
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
return(-1);
/*
* Set up and issue the IOCTL
*/
bzero(&req, sizeof(req));
strcpy(req.ifr_name, intf);
rc = ioctl(s, SIOCGIFNETMASK, (caddr_t)&req);
(void)close(s);
if (rc)
return(-1);
/*
* Give the answer back to the caller
*/
ip_mask = (struct sockaddr_in *)(void *)&req.ifr_addr;
*mask = *ip_mask;
mask->sin_family = AF_INET;
return(0);
}
/*
* Get an interface's MTU
*
* Arguments:
* intf pointer to an interface name
* mtu pointer to an int to receive the MTU
*
* Returns:
* >= 0 interface MTU
* -1 error
*
*/
int
get_mtu(const char *intf)
{
int rc, s;
struct ifreq req;
/*
* Check parameters
*/
if (!intf || strlen(intf) == 0 ||
strlen(intf) > IFNAMSIZ-1)
return(-1);
/*
* Open a socket for the IOCTL
*/
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
return(-1);
/*
* Set up and issue the IOCTL
*/
bzero(&req, sizeof(req));
strcpy(req.ifr_name, intf);
rc = ioctl(s, SIOCGIFMTU, (caddr_t)&req);
(void)close(s);
/*
* Set the appropriate return value
*/
if (rc)
return(-1);
else
return(req.ifr_mtu);
}
/*
* Verify netif name
*
* This routine issues an IOCTL to check whether the passed string is
* a valid network interface name.
*
* Arguments:
* req pointer to an ATM information request IOCTL structure
*
* Returns:
* -1 error encountered
* FALSE (0) the string is not a NIF name
* TRUE (> 0) the string is a valid NIF name
*
*/
int
verify_nif_name(const char *name)
{
int rc, s;
struct atminfreq air;
struct air_netif_rsp *nif_info;
/*
* Check whether name is of a valid length
*/
if (strlen(name) > IFNAMSIZ - 1 ||
strlen(name) < 1) {
return(FALSE);
}
/*
* Open a socket for the IOCTL
*/
s = socket(AF_ATM, SOCK_DGRAM, 0);
if (s < 0) {
return(-1);
}
/*
* Get memory for returned information
*/
nif_info = malloc(sizeof(struct air_netif_rsp));
if (nif_info == NULL) {
errno = ENOMEM;
return(-1);
}
bzero(nif_info, sizeof(struct air_netif_rsp));
/*
* Set up the request
*/
air.air_opcode = AIOCS_INF_NIF;
air.air_buf_addr = (caddr_t)nif_info;
air.air_buf_len = sizeof(struct air_netif_rsp);
bzero(air.air_netif_intf, sizeof(air.air_netif_intf));
strcpy(air.air_netif_intf, name);
/*
* Issue the IOCTL
*/
rc = ioctl(s, AIOCINFO, (caddr_t)&air);
free(nif_info);
(void)close(s);
/*
* Base return value on IOCTL return code
*/
if (rc)
return(FALSE);
else
return(TRUE);
}
/*
* Get Config information
*
* Arguments:
* intf pointer to interface name (or null string)
* cfgp pointer to a pointer to a struct air_cfg_rsp for the
* address of the returned Config information
*
* Returns:
* int length of returned Config information
*
*/
ssize_t
get_cfg_info(const char *intf, struct air_cfg_rsp **cfgp)
{
size_t buf_len = sizeof(struct air_cfg_rsp) * 4;
struct atminfreq air;
/*
* Initialize IOCTL request
*/
air.air_opcode = AIOCS_INF_CFG;
bzero ( air.air_cfg_intf, sizeof(air.air_cfg_intf));
if ( intf != NULL && strlen(intf) != 0 )
strncpy(air.air_cfg_intf, intf, IFNAMSIZ - 1);
buf_len = do_info_ioctl ( &air, buf_len );
/*
* Return a pointer to the Config info and its length
*/
*cfgp = (struct air_cfg_rsp *)(void *)air.air_buf_addr;
return ( buf_len );
}
/*
* Get Physical Interface information
*
* Arguments:
* intf pointer to interface name (or null string)
* intp pointer to a pointer to a struct air_cfg_rsp for the
* address of the returned Config information
*
* Returns:
* int length of returned Config information
*
*/
ssize_t
get_intf_info(const char *intf, struct air_int_rsp **intp)
{
size_t buf_len = sizeof(struct air_int_rsp) * 4;
struct atminfreq air;
/*
* Initialize IOCTL request
*/
air.air_opcode = AIOCS_INF_INT;
bzero ( air.air_int_intf, sizeof(air.air_int_intf));
if ( intf != NULL && strlen(intf) != 0 )
strncpy(air.air_int_intf, intf, IFNAMSIZ - 1);
buf_len = do_info_ioctl ( &air, buf_len );
/*
* Return a pointer to the Physical Interface info and its length
*/
*intp = (struct air_int_rsp *)(void *)air.air_buf_addr;
return ( buf_len );
}
/*
* Get Netif information
*
* Arguments:
* intf pointer to interface name (or null string)
* netp pointer to a pointer to a struct air_netif_rsp for the
* address of the returned Netif information
*
* Returns:
* int length of returned Netif information
*
*/
ssize_t
get_netif_info(const char *intf, struct air_netif_rsp **netp)
{
size_t buf_len = sizeof(struct air_netif_rsp) * 10;
struct atminfreq air;
/*
* Initialize IOCTL request
*/
air.air_opcode = AIOCS_INF_NIF;
bzero ( air.air_int_intf, sizeof(air.air_int_intf) );
if ( intf != NULL && strlen(intf) != 0 )
strncpy(air.air_int_intf, intf, IFNAMSIZ - 1);
buf_len = do_info_ioctl ( &air, buf_len );
/*
* Return a pointer to the Netif info and its length
*/
*netp = (struct air_netif_rsp *) air.air_buf_addr;
return ( buf_len );
}