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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/dns/dnsquestion.h Normal file
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#ifndef COSMOPOLITAN_LIBC_DNS_DNSQUESTION_H_
#define COSMOPOLITAN_LIBC_DNS_DNSQUESTION_H_
#include "libc/dns/dns.h"
#include "libc/sysv/errfuns.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
struct DnsQuestion {
const char *qname;
uint16_t qtype;
uint16_t qclass;
};
/**
* Serializes DNS question record to wire.
*
* @return number of bytes written
* @see pascalifydnsname()
*/
forceinline int serializednsquestion(uint8_t *buf, size_t size,
struct DnsQuestion dq) {
int wrote;
if ((wrote = pascalifydnsname(buf, size, dq.qname)) == -1) return -1;
if (wrote + 1 + 4 > size) return enospc();
buf[wrote + 1] = dq.qtype >> 010, buf[wrote + 2] = dq.qtype >> 000;
buf[wrote + 3] = dq.qclass >> 010, buf[wrote + 4] = dq.qclass >> 000;
return wrote + 5;
}
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_DNS_DNSQUESTION_H_ */