ipsec_radij.c

This a good VPN source

	if (key == NULL || mask == NULL) {
                return 0;
        }

	buf_len = subnettoa(key->sen_ip_src, mask->sen_ip_src, 0, buf1, sizeof(buf1));
	if(key->sen_sport != 0) {
	  sprintf(buf1+buf_len-1, ":%d", ntohs(key->sen_sport));
	}

	buf_len = subnettoa(key->sen_ip_dst, mask->sen_ip_dst, 0, buf2, sizeof(buf2));
	if(key->sen_dport != 0) {
	  sprintf(buf2+buf_len-1, ":%d", ntohs(key->sen_dport));
	}

	buf3[0]='\0';
	if(key->sen_proto != 0) {
	  sprintf(buf3, ":%d", key->sen_proto);
	}

	sa_len = satot(&ro->er_said, 'x', sa, sizeof(sa));
	w->len += ipsec_snprintf(w->buffer + w->len,
				 w->length - w->len,
				 "%-10d "
				 "%-18s -> %-18s => %s%s\n",
				 ro->er_count,
				 buf1,
				 buf2,
				 sa_len ? sa : " (error)",
				 buf3);
	
       {
               /* snprintf can only fill the last character with NUL
                * so the maximum useful character is w->length-1.
                * However, if w->length == 0, we cannot go back.
                * (w->length surely cannot be negative.)
                */
               int max_content = w->length > 0? w->length-1 : 0;

               if (w->len >= max_content) {
                       /* we've done all that can fit -- stop treewalking */
                       w->len = max_content;   /* truncate crap */
                       return -ENOBUFS;
               } else {
                       const off_t pos = w->begin + w->len;    /* file position of end of what we've generated */
                
                       if (pos <= w->offset) {
                               /* all is before first interesting character:
                                * discard, but note where we are.
                                */
                               w->len = 0;
                               w->begin = pos;
                       }
                       return 0;
               }
        }        
}
#endif          /* CONFIG_PROC_FS */

int
ipsec_rj_walker_delete(struct radij_node *rn, void *w0)
{
	struct eroute *ro;
	struct rjtentry *rd = (struct rjtentry *)rn;
	struct radij_node *rn2;
	int error;
	struct sockaddr_encap *key, *mask;
	
	key = rd_key(rd);
	mask = rd_mask(rd);
	
	if(!key || !mask) {
		return -ENODATA;
	}
#ifdef CONFIG_KLIPS_DEBUG
	if(debug_radij)	{
		char buf1[SUBNETTOA_BUF], buf2[SUBNETTOA_BUF];
		subnettoa(key->sen_ip_src, mask->sen_ip_src, 0, buf1, sizeof(buf1));
		subnettoa(key->sen_ip_dst, mask->sen_ip_dst, 0, buf2, sizeof(buf2));
		KLIPS_PRINT(debug_radij, 
			    "klips_debug:ipsec_rj_walker_delete: "
			    "deleting: %s -> %s\n",
			    buf1,
			    buf2);
	}
#endif /* CONFIG_KLIPS_DEBUG */

	if((error = rj_delete(key, mask, rnh, &rn2))) {
		KLIPS_PRINT(debug_radij,
			    "klips_debug:ipsec_rj_walker_delete: "
			    "rj_delete failed with error=%d.\n", error);
		return error;
	}

	if(rn2 != rn) {
		printk("klips_debug:ipsec_rj_walker_delete: "
		       "tried to delete a different node?!?  This should never happen!\n");
	}
 
	ro = (struct eroute *)rn;
	
	if (ro->er_ident_s.data)
		kfree(ro->er_ident_s.data);
	if (ro->er_ident_d.data)
		kfree(ro->er_ident_d.data);
	
	memset((caddr_t)rn, 0, sizeof (struct eroute));
	kfree(rn);
	
	return 0;
}

/*
 * $Log: ipsec_radij.c,v $
 * Revision 1.72  2004/12/03 21:25:57  mcr
 * 	compile time fixes for running on 2.6.
 * 	still experimental.
 *
 * Revision 1.71  2004/07/10 19:11:18  mcr
 * 	CONFIG_IPSEC -> CONFIG_KLIPS.
 *
 * Revision 1.70  2004/04/25 21:10:52  ken
 * Pull in dhr's changes from FreeS/WAN 2.06
 *
 * Revision 1.69  2004/04/06 02:49:26  mcr
 * 	pullup of algo code from alg-branch.
 *
 * Revision 1.68  2004/03/28 20:27:20  paul
 * Included tested and confirmed fixes mcr made and dhr verified for
 * snprint statements. Changed one other snprintf to use ipsec_snprintf
 * so it wouldnt break compatibility with 2.0/2.2 kernels. Verified with
 * dhr. (thanks dhr!)
 *
 * Revision 1.67.4.1  2004/04/05 04:30:46  mcr
 * 	patches for alg-branch to compile/work with 2.x openswan
 *
 * Revision 1.67  2003/10/31 02:27:55  mcr
 * 	pulled up port-selector patches and sa_id elimination.
 *
 * Revision 1.66.24.2  2003/10/29 01:30:41  mcr
 * 	elimited "struct sa_id".
 *
 * Revision 1.66.24.1  2003/09/21 13:59:56  mcr
 * 	pre-liminary X.509 patch - does not yet pass tests.
 *
 * Revision 1.66  2002/10/12 23:11:53  dhr
 *
 * [KenB + DHR] more 64-bit cleanup
 *
 * Revision 1.65  2002/09/20 05:01:40  rgb
 * Added memory allocation debugging.
 *
 * Revision 1.64  2002/05/31 01:46:05  mcr
 * 	added && sysctl_ipsec_debug_verbose verbose to ipsec_findroute
 * 	as requested in PR#14.
 *
 * Revision 1.63  2002/05/23 07:14:11  rgb
 * Cleaned up %p variants to 0p%p for test suite cleanup.
 *
 * Revision 1.62  2002/04/24 07:55:32  mcr
 * 	#include patches and Makefiles for post-reorg compilation.
 *
 * Revision 1.61  2002/04/24 07:36:29  mcr
 * Moved from ./klips/net/ipsec/ipsec_radij.c,v
 *
 * Revision 1.60  2002/02/19 23:59:45  rgb
 * Removed redundant compiler directives.
 *
 * Revision 1.59  2002/02/06 04:13:47  mcr
 * 	missing #ifdef CONFIG_IPSEC_DEBUG.
 *
 * Revision 1.58  2002/01/29 17:17:56  mcr
 * 	moved include of ipsec_param.h to after include of linux/kernel.h
 * 	otherwise, it seems that some option that is set in ipsec_param.h
 * 	screws up something subtle in the include path to kernel.h, and
 * 	it complains on the snprintf() prototype.
 *
 * Revision 1.57  2002/01/29 04:00:52  mcr
 * 	more excise of kversions.h header.
 *
 * Revision 1.56  2002/01/29 02:13:17  mcr
 * 	introduction of ipsec_kversion.h means that include of
 * 	ipsec_param.h must preceed any decisions about what files to
 * 	include to deal with differences in kernel source.
 *
 * Revision 1.55  2001/11/26 09:23:48  rgb
 * Merge MCR's ipsec_sa, eroute, proc and struct lifetime changes.
 *
 * Revision 1.53.2.1  2001/09/25 02:26:32  mcr
 * 	headers adjusted for new usage.
 *
 * Revision 1.54  2001/10/18 04:45:20  rgb
 * 2.4.9 kernel deprecates linux/malloc.h in favour of linux/slab.h,
 * lib/freeswan.h version macros moved to lib/kversions.h.
 * Other compiler directive cleanups.
 *
 * Revision 1.53  2001/09/19 17:19:40  rgb
 * Debug output bugfix for NetCelo's PF_KEY ident patch.
 *
 * Revision 1.52  2001/09/19 16:33:37  rgb
 * Temporarily disable ident fields to /proc/net/ipsec_eroute.
 *
 * Revision 1.51  2001/09/15 16:24:04  rgb
 * Re-inject first and last HOLD packet when an eroute REPLACE is done.
 *
 * Revision 1.50  2001/09/14 16:58:36  rgb
 * Added support for storing the first and last packets through a HOLD.
 *
 * Revision 1.49  2001/09/08 21:13:32  rgb
 * Added pfkey ident extension support for ISAKMPd. (NetCelo)
 *
 * Revision 1.48  2001/06/15 04:12:56  rgb
 * Fixed kernel memory allocation error return code polarity bug.
 *
 * Revision 1.47  2001/06/14 19:35:09  rgb
 * Update copyright date.
 *
 * Revision 1.46  2001/06/08 08:47:18  rgb
 * Fixed for debug disabled.
 *
 * Revision 1.45  2001/05/27 06:12:11  rgb
 * Added structures for pid, packet count and last access time to eroute.
 * Added packet count to beginning of /proc/net/ipsec_eroute.
 *
 * Revision 1.44  2001/05/03 19:41:01  rgb
 * Initialise error return variable.
 * Use more appropriate return value for ipsec_rj_walker_delete().
 *
 * Revision 1.43  2001/02/27 22:24:54  rgb
 * Re-formatting debug output (line-splitting, joining, 1arg/line).
 * Check for satoa() return codes.
 *
 * Revision 1.42  2001/02/27 06:21:57  rgb
 * Added findroute success instrumentation.
 *
 * Revision 1.41  2000/11/06 04:32:08  rgb
 * Ditched spin_lock_irqsave in favour of spin_lock_bh.
 *
 * Revision 1.40  2000/09/08 19:12:56  rgb
 * Change references from DEBUG_IPSEC to CONFIG_IPSEC_DEBUG.
 *
 * Revision 1.39  2000/08/30 05:25:20  rgb
 * Correct debug text in ipsec_breakroute() from incorrect
 * "ipsec_callback".
 *
 * Revision 1.38  2000/07/28 14:58:31  rgb
 * Changed kfree_s to kfree, eliminating extra arg to fix 2.4.0-test5.
 *
 * Revision 1.37  2000/03/16 14:02:50  rgb
 * Fixed debug scope to enable compilation with debug off.
 *
 * Revision 1.36  2000/01/21 06:14:46  rgb
 * Added debugging text to ipsec_rj_walker_delete().
 * Set return code to negative for consistency.
 *
 * Revision 1.35  1999/11/23 23:05:24  rgb
 * Use provided macro ADDRTOA_BUF instead of hardcoded value.
 *
 * Revision 1.34  1999/11/18 04:13:56  rgb
 * Replaced all kernel version macros to shorter, readable form.
 * Added CONFIG_PROC_FS compiler directives in case it is shut off.
 *
 * Revision 1.33  1999/11/17 15:53:39  rgb
 * Changed all occurrences of #include "../../../lib/freeswan.h"
 * to #include <freeswan.h> which works due to -Ilibfreeswan in the
 * klips/net/ipsec/Makefile.
 *
 * Revision 1.32  1999/10/26 13:58:33  rgb
 * Put spinlock flags variable declaration outside the debug compiler
 * directive to enable compilation with debug shut off.
 *
 * Revision 1.31  1999/10/15 22:13:29  rgb
 * Clean out cruft.
 * Align /proc/net/ipsec_eroute output for easier readability.
 * Fix double linefeed in radij debug output.
 * Fix double locking bug that locks up 2.0.36 but not 2.0.38.
 *
 * Revision 1.30  1999/10/08 18:37:33  rgb
 * Fix end-of-line spacing to sate whining PHMs.
 *
 * Revision 1.29  1999/10/03 18:52:45  rgb
 * Spinlock support for 2.0.xx.
 * Dumb return code spin_unlock fix.
 *
 * Revision 1.28  1999/10/01 16:22:24  rgb
 * Switch from assignment init. to functional init. of spinlocks.
 *
 * Revision 1.27  1999/10/01 15:44:53  rgb
 * Move spinlock header include to 2.1> scope.
 *
 * Revision 1.26  1999/10/01 00:01:23  rgb
 * Added eroute structure locking.
 *
 * Revision 1.25  1999/06/10 16:07:30  rgb
 * Silence delete eroute on no debug.
 *
 * Revision 1.24  1999/05/09 03:25:36  rgb
 * Fix bug introduced by 2.2 quick-and-dirty patch.
 *
 * Revision 1.23  1999/05/05 22:02:31  rgb
 * Add a quick and dirty port to 2.2 kernels by Marc Boucher <[e-mail]>.
 *
 * Revision 1.22  1999/04/29 15:17:23  rgb
 * Add return values to init and cleanup functions.
 * Add sanity checking for null pointer arguments.
 *
 * Revision 1.21  1999/04/11 00:28:58  henry
 * GPL boilerplate
 *
 * Revision 1.20  1999/04/06 04:54:26  rgb
 * Fix/Add RCSID Id: and Log: bits to make PHMDs happy.  This includes
 * patch shell fixes.
 *
 * Revision 1.19  1999/02/17 16:50:35  rgb
 * Clean out unused cruft.
 * Consolidate for space and speed efficiency.
 * Convert DEBUG_IPSEC to KLIPS_PRINT
 *
 * Revision 1.18  1999/01/22 06:22:06  rgb
 * Cruft clean-out.
 * 64-bit clean-up.
 *
 * Revision 1.17  1998/12/02 03:09:39  rgb
 * Clean up debug printing conditionals to compile with debugging off.
 *
 * Revision 1.16  1998/12/01 13:49:39  rgb
 * Wrap version info printing in debug switches.
 *
 * Revision 1.15  1998/11/30 13:22:54  rgb
 * Rationalised all the klips kernel file headers.  They are much shorter
 * now and won't conflict under RH5.2.
 *
 * Revision 1.14  1998/10/31 06:48:17  rgb
 * Fixed up comments in #endif directives.
 *
 * Revision 1.13  1998/10/27 13:48:09  rgb
 * Cleaned up /proc/net/ipsec_* filesystem for easy parsing by scripts.
 * Fixed less(1) truncated output bug.
 * Code clean-up.
 *
 * Revision 1.12  1998/10/25 02:41:36  rgb
 * Change return type on ipsec_breakroute and ipsec_makeroute and add an
 * argument to be able to transmit more infomation about errors.
 * Fix cut-and-paste debug statement identifier.
 *
 * Revision 1.11  1998/10/22 06:45:39  rgb
 * Cleaned up cruft.
 * Convert to use satoa for printk.
 *
 * Revision 1.10  1998/10/19 14:44:28  rgb
 * Added inclusion of freeswan.h.
 * sa_id structure implemented and used: now includes protocol.
 *
 * Revision 1.9  1998/10/09 04:30:52  rgb
 * Added 'klips_debug' prefix to all klips printk debug statements.
 * Deleted old commented out cruft.
 *
 * Revision 1.8  1998/08/06 17:24:23  rgb
 * Fix addrtoa return code bug from stale manpage advice preventing packets
 * from being erouted.
 *
 * Revision 1.7  1998/08/06 07:44:59  rgb
 * Fixed /proc/net/ipsec_eroute subnettoa and addrtoa return value bug that
 * ended up in nothing being printed.
 *
 * Revision 1.6  1998/08/05 22:16:41  rgb
 * Cleanup to prevent cosmetic errors (ie. debug output) from being fatal.
 *
 * Revision 1.5  1998/07/29 20:38:44  rgb
 * Debug and fix subnettoa and addrtoa output.
 *
 * Revision 1.4  1998/07/28 00:02:39  rgb
 * Converting to exclusive use of addrtoa.
 * Fix eroute delete.
 *
 * Revision 1.3  1998/07/14 18:21:26  rgb
 * Add function to clear the eroute table.
 *
 * Revision 1.2  1998/06/23 02:59:14  rgb
 * Added debugging output to eroute add/delete routines.
 *
 * Revision 1.9  1998/06/18 21:29:06  henry
 * move sources from klips/src to klips/net/ipsec, to keep stupid kernel
 * build scripts happier in presence of symbolic links
 *
 * Revision 1.8  1998/06/05 02:32:26  rgb
 * Fix spi ntoh kernel debug output.
 *
 * Revision 1.7  1998/05/25 20:30:37  rgb
 * Remove temporary ipsec_walk, rj_deltree and rj_delnodes functions.
 *
 * Rename ipsec_rj_walker (ipsec_walk) to ipsec_rj_walker_procprint and
 * add ipsec_rj_walker_delete.
 *
 * Revision 1.6  1998/05/21 13:08:57  rgb
 * Rewrote procinfo subroutines to avoid *bad things* when more that 3k of
 * information is available for printout.
 *
 * Revision 1.5  1998/05/18 21:35:55  rgb
 * Clean up output for numerical consistency and readability.  Zero freed
 * eroute memory.
 *
 * Revision 1.4  1998/04/21 21:28:58  rgb
 * Rearrange debug switches to change on the fly debug output from user
 * space.  Only kernel changes checked in at this time.  radij.c was also
 * changed to temporarily remove buggy debugging code in rj_delete causing
 * an OOPS and hence, netlink device open errors.
 *
 * Revision 1.3  1998/04/14 17:30:39  rgb
 * Fix up compiling errors for radij tree memory reclamation.
 *
 * Revision 1.2  1998/04/12 22:03:23  rgb
 * Updated ESP-3DES-HMAC-MD5-96,
 * 	ESP-DES-HMAC-MD5-96,
 * 	AH-HMAC-MD5-96,
 * 	AH-HMAC-SHA1-96 since Henry started freeswan cvs repository
 * from old standards (RFC182[5-9] to new (as of March 1998) drafts.
 *
 * Fixed eroute references in /proc/net/ipsec*.
 *
 * Started to patch module unloading memory leaks in ipsec_netlink and
 * radij tree unloading.
 *
 * Revision 1.1  1998/04/09 03:06:10  henry
 * sources moved up from linux/net/ipsec
 *
 * Revision 1.1.1.1  1998/04/08 05:35:03  henry
 * RGB's ipsec-0.8pre2.tar.gz ipsec-0.8
 *
 * Revision 0.4  1997/01/15 01:28:15  ji
 * No changes.
 *
 * Revision 0.3  1996/11/20 14:39:04  ji
 * Minor cleanups.
 * Rationalized debugging code.
 *
 * Revision 0.2  1996/11/02 00:18:33  ji
 * First limited release.
 *
 *
 */