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2127f26023
for possible buffer overflow problems. Replaced most sprintf()'s with snprintf(); for others cases, added terminating NUL bytes where appropriate, replaced constants like "16" with sizeof(), etc. These changes include several bug fixes, but most changes are for maintainability's sake. Any instance where it wasn't "immediately obvious" that a buffer overflow could not occur was made safer. Reviewed by: Bruce Evans <bde@zeta.org.au> Reviewed by: Matthew Dillon <dillon@apollo.backplane.com> Reviewed by: Mike Spengler <mks@networkcs.com>
272 lines
6.3 KiB
C
272 lines
6.3 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: eni_if.c,v 1.2 1998/10/31 20:06:45 phk Exp $
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*
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*/
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/*
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* Efficient ENI Adapter Support
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* -----------------------------
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*
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* Network interface layer support
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*
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*/
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#include <netatm/kern_include.h>
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#include <dev/hea/eni_stats.h>
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#include <dev/hea/eni.h>
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#include <dev/hea/eni_suni.h>
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#include <dev/hea/eni_var.h>
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#ifndef lint
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__RCSID("@(#) $Id: eni_if.c,v 1.2 1998/10/31 20:06:45 phk Exp $");
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#endif
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static void eni_get_stats __P((Eni_unit *));
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/*
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* SUNI statistics counters take one of three forms:
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* single byte value (0x0 - 0xff)
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* two byte value (0x0 - 0xffff)
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* two + 1/2 (three) byte value
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* (0x0 - 0x0fffff)
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*/
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#define READ_ONE(x) ( (eup->eu_suni[(x)] & 0xff) )
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#define READ_TWO(x) ( (eup->eu_suni[(x)+1] & 0xff) << 8 | \
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(eup->eu_suni[(x)] & 0xff) )
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#define READ_THREE(x) ( (eup->eu_suni[(x)+2] & 0xf) << 16 | \
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(eup->eu_suni[(x)+1] & 0xff) << 8 | \
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(eup->eu_suni[(x)] & 0xff) )
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/*
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* Do an initial read of the error counters without saving them.
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* In effect, this will "zero" our idea of the number of errors
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* which have occurred since the driver was loaded.
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*
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* Arguments:
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* eup pointer to per unit structure
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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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void
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eni_zero_stats ( eup )
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Eni_unit *eup;
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{
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int val;
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/*
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* Write the SUNI master control register which
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* will cause all the statistics counters to be
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* loaded.
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*/
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eup->eu_suni[SUNI_MASTER_REG] = eup->eu_suni[SUNI_MASTER_REG];
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/*
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* Delay to allow for counter load time...
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*/
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DELAY ( SUNI_DELAY );
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/*
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* Statistics counters contain the number of events
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* since the last time the counter was read.
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*/
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val = READ_TWO ( SUNI_SECT_BIP_REG ); /* oc3_sect_bip8 */
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val = READ_TWO ( SUNI_PATH_BIP_REG ); /* oc3_path_bip8 */
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val = READ_THREE ( SUNI_LINE_BIP_REG ); /* oc3_line_bip24 */
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val = READ_THREE ( SUNI_LINE_FEBE_REG ); /* oc3_line_febe */
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val = READ_TWO ( SUNI_PATH_FEBE_REG ); /* oc3_path_febe */
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val = READ_ONE ( SUNI_HECS_REG ); /* oc3_hec_corr */
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val = READ_ONE ( SUNI_UHECS_REG ); /* oc3_hec_uncorr */
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}
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/*
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* Retrieve SUNI stats
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*
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* Arguments:
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* eup pointer to per unit structure
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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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eni_get_stats ( eup )
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Eni_unit *eup;
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{
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/*
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* Write the SUNI master control register which
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* will cause all the statistics counters to be
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* loaded.
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*/
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eup->eu_suni[SUNI_MASTER_REG] = eup->eu_suni[SUNI_MASTER_REG];
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/*
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* Delay to allow for counter load time...
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*/
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DELAY ( 10 );
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/*
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* Statistics counters contain the number of events
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* since the last time the counter was read.
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*/
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eup->eu_stats.eni_st_oc3.oc3_sect_bip8 +=
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READ_TWO ( SUNI_SECT_BIP_REG );
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eup->eu_stats.eni_st_oc3.oc3_path_bip8 +=
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READ_TWO ( SUNI_PATH_BIP_REG );
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eup->eu_stats.eni_st_oc3.oc3_line_bip24 +=
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READ_THREE ( SUNI_LINE_BIP_REG );
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eup->eu_stats.eni_st_oc3.oc3_line_febe +=
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READ_THREE ( SUNI_LINE_FEBE_REG );
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eup->eu_stats.eni_st_oc3.oc3_path_febe +=
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READ_TWO ( SUNI_PATH_FEBE_REG );
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eup->eu_stats.eni_st_oc3.oc3_hec_corr +=
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READ_ONE ( SUNI_HECS_REG );
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eup->eu_stats.eni_st_oc3.oc3_hec_uncorr +=
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READ_ONE ( SUNI_UHECS_REG );
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}
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/*
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* Handle netatm core service interface ioctl requests
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*
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* Called at splnet.
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*
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* Arguments:
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* code ioctl function (sub)code
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* data data to/from ioctl
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* arg optional code-specific argument
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*
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* Returns:
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* 0 request processed successfully
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* error request failed - reason code
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*
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*/
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int
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eni_atm_ioctl ( code, data, arg )
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int code;
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caddr_t data;
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caddr_t arg;
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{
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struct atminfreq *aip = (struct atminfreq *)data;
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struct atm_pif *pip = (struct atm_pif *)arg;
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Eni_unit *eup = (Eni_unit *)pip;
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caddr_t buf = aip->air_buf_addr;
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struct air_vinfo_rsp *avr;
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int count, len, buf_len = aip->air_buf_len;
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int err = 0;
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char ifname[2*IFNAMSIZ];
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ATM_DEBUG2("eni_atm_ioctl: code=%d, opcode=%d\n",
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code, aip->air_opcode );
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switch ( aip->air_opcode ) {
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case AIOCS_INF_VST:
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/*
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* Get vendor statistics
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*/
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if ( eup == NULL )
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return ( ENXIO );
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snprintf ( ifname, sizeof(ifname),
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"%s%d", pip->pif_name, pip->pif_unit );
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/*
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* Cast response structure onto user's buffer
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*/
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avr = (struct air_vinfo_rsp *)buf;
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/*
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* How large is the response structure
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*/
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len = sizeof(struct air_vinfo_rsp);
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/*
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* Sanity check - enough room for response structure?
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*/
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if ( buf_len < len )
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return ( ENOSPC );
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/*
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* Copy interface name into response structure
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*/
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if ( err = copyout ( ifname, avr->avsp_intf, IFNAMSIZ ) )
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break;
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/*
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* Advance the buffer address and decrement the size
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*/
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buf += len;
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buf_len -= len;
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/*
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* Get the vendor stats (SUNI) from the hardware
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*/
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eni_get_stats ( eup );
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/*
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* Stick as much of it as we have room for
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* into the response
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*/
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count = MIN ( sizeof(Eni_stats), buf_len );
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/*
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* Copy stats into user's buffer. Return value is
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* amount of data copied.
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*/
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if ( err = copyout ((void *)&eup->eu_stats, buf,
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count))
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break;
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buf += count;
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buf_len -= count;
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if ( count < sizeof(Eni_stats) )
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err = ENOSPC;
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/*
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* Record amount we're returning as vendor info...
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*/
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if (err = copyout(&count, &avr->avsp_len, sizeof(int)))
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break;
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/*
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* Update the reply pointers and length
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*/
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aip->air_buf_addr = buf;
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aip->air_buf_len = buf_len;
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break;
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default:
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err = ENOSYS; /* Operation not supported */
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break;
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}
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return ( err );
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}
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