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authorDenis Vlasenko2008-05-22 17:41:01 +0000
committerDenis Vlasenko2008-05-22 17:41:01 +0000
commite9b76e1f1e37f91ec9b30274594b7953f1afa6a2 (patch)
tree5343576f8522de07b5ff92a91be17b538323b396 /networking/dnsd.c
parentae84b11467c56316a43de6146100ce22f24cf622 (diff)
downloadbusybox-e9b76e1f1e37f91ec9b30274594b7953f1afa6a2.zip
busybox-e9b76e1f1e37f91ec9b30274594b7953f1afa6a2.tar.gz
dnsd: fixes various segfaults.
One was a lib api change that was not updated and another is a stack buffer overflow. It also adds support for '*' in dnsd.conf. It resolves all hostnames to a specific ip address. This is useful if you for example want redirect all http traffic to your first-boot-web-wizard on you router/firewall. By Timo Teras
Diffstat (limited to 'networking/dnsd.c')
-rw-r--r--networking/dnsd.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/networking/dnsd.c b/networking/dnsd.c
index cb62d20..97ba2dc 100644
--- a/networking/dnsd.c
+++ b/networking/dnsd.c
@@ -194,7 +194,8 @@ static int table_lookup(uint16_t type, uint8_t * as, uint8_t * qs)
for (i = 1; i <= (int)(d->name[0]); i++)
if (tolower(qs[i]) != d->name[i])
break;
- if (i > (int)(d->name[0])) {
+ if (i > (int)(d->name[0]) ||
+ (d->name[0] == 1 && d->name[1] == '*')) {
strcpy((char *)as, d->ip);
#if DEBUG
fprintf(stderr, " OK as:%s\n", as);
@@ -202,7 +203,8 @@ static int table_lookup(uint16_t type, uint8_t * as, uint8_t * qs)
return 0;
}
} else if (type == REQ_PTR) { /* search by IP-address */
- if (!strncmp((char*)&d->rip[1], (char*)&qs[1], strlen(d->rip)-1)) {
+ if ((d->name[0] != 1 || d->name[1] != '*') &&
+ !strncmp((char*)&d->rip[1], (char*)&qs[1], strlen(d->rip)-1)) {
strcpy((char *)as, d->name);
return 0;
}
@@ -401,7 +403,7 @@ int dnsd_main(int argc ATTRIBUTE_UNUSED, char **argv)
r = process_packet(buf);
if (r <= 0)
continue;
- send_to_from(udps, buf, r, 0, &to->u.sa, &from->u.sa, lsa->len);
+ send_to_from(udps, buf, r, 0, &from->u.sa, &to->u.sa, lsa->len);
}
return 0;
}