Attachment 63972 Details for Bug 95277 – maskmatch.c

maskmatch.c

maskmatch.c (text/plain), 3.19 KB, created by Bruce M Simpson on 2006-09-28 18:07:34 UTC

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Creator: Bruce M Simpson

Created: 2006-09-28 18:07:34 UTC

Size: 3.19 KB

patch

obsolete

>/*
> * test case for mask_match() bug
> */
>
>#include <sys/types.h>
>#include <sys/socket.h>
>#include <net/route.h>
>#include <netinet/in.h>
>#include <netinet/ip_mroute.h>
>
>#include <stddef.h>
>#include <stdarg.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <string.h>
>#include <err.h>
>#include <errno.h>
>
>/* XXX */
>struct encaptab {
>int af;
>int proto;
>struct sockaddr_storage src;
>struct sockaddr_storage srcmask;
>struct sockaddr_storage dst;
>struct sockaddr_storage dstmask;
>};
>
>int
>mask_match(ep, sp, dp)
>	const struct encaptab *ep;
>	const struct sockaddr *sp;
>	const struct sockaddr *dp;
>{
>	struct sockaddr_storage s;
>	struct sockaddr_storage d;
>	int i;
>	const u_int8_t *p, *q;
>	u_int8_t *r;
>	int matchlen;
>
>	if (sp->sa_len > sizeof(s) || dp->sa_len > sizeof(d)) {
>		fprintf(stderr, "lengths too big\n");
>		return 0;
>	}
>	if (sp->sa_family != ep->af || dp->sa_family != ep->af) {
>		fprintf(stderr, "af dont match \n");
>		return 0;
>	}
>	if (sp->sa_len != ep->src.ss_len || dp->sa_len != ep->dst.ss_len) {
>		fprintf(stderr, "lengths dont match \n");
>		return 0;
>	}
>
>	matchlen = 0;
>
>	p = (const u_int8_t *)sp;
>	q = (const u_int8_t *)&ep->srcmask;
>	r = (u_int8_t *)&s;
>	for (i = 0 ; i < sp->sa_len; i++) {
>		r[i] = p[i] & q[i];
>		/* XXX estimate */
>		matchlen += (q[i] ? 8 : 0);
>	}
>
>	p = (const u_int8_t *)dp;
>	q = (const u_int8_t *)&ep->dstmask;
>	r = (u_int8_t *)&d;
>	for (i = 0 ; i < dp->sa_len; i++) {
>		r[i] = p[i] & q[i];
>		/* XXX rough estimate */
>		matchlen += (q[i] ? 8 : 0);
>	}
>
>	/* need to overwrite len/family portion as we don't compare them */
>	s.ss_len = sp->sa_len;
>	s.ss_family = sp->sa_family;
>	d.ss_len = dp->sa_len;
>	d.ss_family = dp->sa_family;
>
>	if (bcmp(&s, &ep->src, ep->src.ss_len) == 0 &&
>	    bcmp(&d, &ep->dst, ep->dst.ss_len) == 0) {
>		fprintf(stderr, "match\n");
>		return matchlen;
>	} else {
>		fprintf(stderr, "no match\n");
>		return 0;
>	}
>}
>
>int
>main(int argc, char *argv[])
>{
>	struct encaptab e;
>	struct sockaddr_storage ss1;
>	struct sockaddr_storage ss2;
>	struct sockaddr_in *psin_1;
>	struct sockaddr_in *psin_2;
>	int result;
>
>	bzero(&e, sizeof(e));
>	e.af = AF_INET;
>	e.proto = -1;
>
>	psin_1 = (struct sockaddr_in *)&e.src;
>	psin_1->sin_family = AF_INET;
>	psin_1->sin_len = sizeof(struct sockaddr_in);
>	psin_1->sin_addr.s_addr = inet_addr("1.2.3.4");
>
>	psin_1 = (struct sockaddr_in *)&e.srcmask;
>	psin_1->sin_family = AF_INET;
>	psin_1->sin_len = sizeof(struct sockaddr_in);
>	psin_1->sin_addr.s_addr = inet_addr("255.255.255.0");
>
>	psin_1 = (struct sockaddr_in *)&e.dst;
>	psin_1->sin_family = AF_INET;
>	psin_1->sin_len = sizeof(struct sockaddr_in);
>	psin_1->sin_addr.s_addr = inet_addr("4.3.2.1");
>
>	psin_1 = (struct sockaddr_in *)&e.dstmask;
>	psin_1->sin_family = AF_INET;
>	psin_1->sin_len = sizeof(struct sockaddr_in);
>	psin_1->sin_addr.s_addr = inet_addr("0.0.0.0");
>
>	bzero(&ss1, sizeof(ss1));
>	bzero(&ss2, sizeof(ss2));
>	psin_1 = (struct sockaddr_in *)&ss1;
>	psin_2 = (struct sockaddr_in *)&ss2;
>	psin_1->sin_len = sizeof(struct sockaddr_in);
>	psin_1->sin_family = AF_INET;
>	psin_1->sin_addr.s_addr = inet_addr("192.168.0.1");
>	psin_2->sin_len = sizeof(struct sockaddr_in);
>	psin_2->sin_family = AF_INET;
>	psin_2->sin_addr.s_addr = inet_addr("4.3.2.2");
>
>	result = mask_match(&e, &ss1, &ss2);
>	printf("result is %d\n", result);
>
>	exit(0);
>}

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Attachments on bug 95277: 63972 | 63973