mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-03 17:58:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make minor improvements

Browse source
This commit is contained in:
Justine Tunney 2021-05-15 21:53:26 -07:00
parent 221817e537
commit 4864565198
41 changed files with 394 additions and 367 deletions
Download patch file Download diff file Expand all files Collapse all files

52
libc/dns/dnsheader.c
View file

@ -21,43 +21,37 @@
#include "libc/sysv/errfuns.h"
/**
* Serializes DNS message header to wire.
* Serializes DNS message h to wire.
*
* @return number of bytes written (always 12) or -1 w/ errno
* @see pascalifydnsname()
*/
int serializednsheader(uint8_t *buf, size_t size,
const struct DnsHeader header) {
if (size < 12) return enospc();
buf[0x0] = header.id >> 010u;
buf[0x1] = header.id >> 000u;
buf[0x2] = header.bf1;
buf[0x3] = header.bf2;
buf[0x4] = header.qdcount >> 010u;
buf[0x5] = header.qdcount >> 000u;
buf[0x6] = header.ancount >> 010u;
buf[0x7] = header.ancount >> 000u;
buf[0x8] = header.nscount >> 010u;
buf[0x9] = header.nscount >> 000u;
buf[0xa] = header.arcount >> 010u;
buf[0xb] = header.arcount >> 000u;
return 12;
void SerializeDnsHeader(uint8_t p[restrict 12], const struct DnsHeader *h) {
p[0x0] = h->id >> 8;
p[0x1] = h->id;
p[0x2] = h->bf1;
p[0x3] = h->bf2;
p[0x4] = h->qdcount >> 8;
p[0x5] = h->qdcount;
p[0x6] = h->ancount >> 8;
p[0x7] = h->ancount;
p[0x8] = h->nscount >> 8;
p[0x9] = h->nscount;
p[0xa] = h->arcount >> 8;
p[0xb] = h->arcount;
}
/**
* Serializes DNS message header to wire.
* Serializes DNS message h to wire.
*
* @return number of bytes read (always 12) or -1 w/ errno
*/
int deserializednsheader(struct DnsHeader *header, const uint8_t *buf,
size_t size) {
if (size < 12) return ebadmsg();
header->id = READ16BE(buf + 0);
header->bf1 = buf[2];
header->bf2 = buf[3];
header->qdcount = READ16BE(buf + 4);
header->ancount = READ16BE(buf + 6);
header->nscount = READ16BE(buf + 8);
header->arcount = READ16BE(buf + 10);
return 12;
void DeserializeDnsHeader(struct DnsHeader *h, const uint8_t p[restrict 12]) {
h->id = READ16BE(p);
h->bf1 = p[2];
h->bf2 = p[3];
h->qdcount = READ16BE(p + 4);
h->ancount = READ16BE(p + 6);
h->nscount = READ16BE(p + 8);
h->arcount = READ16BE(p + 10);
}