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33 lines
745 B
C
33 lines
745 B
C
#include "byte.h"
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#include "fmt.h"
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#include "dns.h"
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#include "haveinline.h"
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/* RFC1886:
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* 4321:0:1:2:3:4:567:89ab
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* ->
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* b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.IP6.INT.
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* b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.IP6.ARPA.
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*/
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static char tohex(char c) {
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return c>=10?c-10+'a':c+'0';
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}
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void dns_name6_domain(char name[DNS_NAME6_DOMAIN],const char ip[16],int t)
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{
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unsigned int j;
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for (j=0; j<16; j++) {
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name[j*4]=1;
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name[j*4+1]=tohex(ip[15-j] & 15);
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name[j*4+2]=1;
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name[j*4+3]=tohex((unsigned char)ip[15-j] >> 4);
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}
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if (t==DNS_IP6_INT)
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byte_copy(name + 4*16,9,"\3ip6\3int\0");
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else if (t==DNS_IP6_ARPA)
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byte_copy(name + 4*16,10,"\3ip6\4arpa\0");
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}
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