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dns-server: fix cname rule issue

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This commit is contained in:
Nick Peng
2023-03-03 21:09:27 +08:00
parent 66b86e1a8b
commit 1ef9da847d
4 changed files with 80 additions and 46 deletions
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12
src/dns.c
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@@ -1687,13 +1687,13 @@ static int _dns_decode_opt_cookie(struct dns_context *context, struct dns_opt_co
return 0;
}
if (opt_len < (int)member_size(struct dns_opt_cookie, server_cookie)) {
if (opt_len < 8 || opt_len > (int)member_size(struct dns_opt_cookie, server_cookie)) {
return -1;
}
memcpy(cookie->server_cookie, context->ptr, len);
cookie->server_cookie_len = len;
context->ptr += len;
memcpy(cookie->server_cookie, context->ptr, opt_len);
cookie->server_cookie_len = opt_len;
context->ptr += opt_len;
tlog(TLOG_DEBUG, "OPT COOKIE");
return 0;
@@ -1860,8 +1860,8 @@ static int _dns_decode_opt(struct dns_context *context, dns_rr_type type, unsign
}
if (errcode != 0) {
tlog(TLOG_ERROR, "extend rcode invalid.");
return -1;
tlog(TLOG_DEBUG, "extend rcode invalid, %d", errcode);
return 0;
}
while (context->ptr - start < rr_len) {