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Code Issues Releases Wiki Activity

Basic SVCB support

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This commit is contained in:
M66B 2021-11-02 18:19:50 +01:00
parent e444fd50e1
commit bfb6ce8e86
2 changed files with 12 additions and 2 deletions
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11
app/src/main/jni/netguard/dns.c
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@ -120,6 +120,7 @@ void parse_dns_response(const struct arguments *args, const struct ng_session *s
}
}
short svcb = 0;
int32_t aoff = off;
for (int a = 0; a < acount; a++) {
off = get_qname(data, *datalen, (uint16_t) off, name);
@ -151,7 +152,12 @@ void parse_dns_response(const struct arguments *args, const struct ng_session *s
log_android(ANDROID_LOG_DEBUG,
"DNS answer %d qname %s qtype %d ttl %d data %s",
a, name, qtype, ttl, rd);
} else if (qclass == DNS_QCLASS_IN &&
(qtype == DNS_SVCB || qtype == DNS_HTTPS)) {
// https://tools.ietf.org/id/draft-ietf-dnsop-svcb-https-01.html
svcb = 1;
log_android(ANDROID_LOG_WARN,
"SVCB answer %d qname %s qtype %d", a, name, qtype);
} else
log_android(ANDROID_LOG_DEBUG,
"DNS answer %d qname %s qclass %d qtype %d ttl %d length %d",
@ -171,7 +177,8 @@ void parse_dns_response(const struct arguments *args, const struct ng_session *s
}
}
if (qcount > 0 && is_domain_blocked(args, qname)) {
if (qcount > 0 &&
(svcb || is_domain_blocked(args, qname))) {
dns->qr = 1;
dns->aa = 0;
dns->tc = 0;

3
app/src/main/jni/netguard/netguard.h
View file

@ -259,6 +259,9 @@ typedef struct pcaprec_hdr_s {
#define DNS_QTYPE_A 1 // IPv4
#define DNS_QTYPE_AAAA 28 // IPv6
#define DNS_SVCB 64
#define DNS_HTTPS 65
#define DNS_QNAME_MAX 255
#define DNS_TTL (10 * 60) // seconds