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74 lines
1.2 KiB
C
74 lines
1.2 KiB
C
#include <stdlib.h>
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#include "case.h"
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#include "byte.h"
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#include "dns.h"
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unsigned int dns_domain_length(const char *dn)
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{
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const char *x;
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unsigned char c;
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x = dn;
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while ((c = *x++))
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x += (unsigned int) c;
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return x - dn;
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}
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void dns_domain_free(char **out)
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{
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if (*out) {
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free(*out);
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*out = 0;
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}
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}
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int dns_domain_copy(char **out,const char *in)
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{
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unsigned int len;
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char *x;
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len = dns_domain_length(in);
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x = malloc(len);
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if (!x) return 0;
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byte_copy(x,len,in);
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if (*out) free(*out);
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*out = x;
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return 1;
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}
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int dns_domain_equal(const char *dn1,const char *dn2)
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{
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unsigned int len;
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len = dns_domain_length(dn1);
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if (len != dns_domain_length(dn2)) return 0;
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if (case_diffb(dn1,len,dn2)) return 0; /* safe since 63 < 'A' */
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return 1;
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}
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int dns_domain_suffix(const char *big,const char *little)
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{
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unsigned char c;
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for (;;) {
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if (dns_domain_equal(big,little)) return 1;
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c = *big++;
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if (!c) return 0;
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big += c;
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}
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}
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unsigned int dns_domain_suffixpos(const char *big,const char *little)
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{
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const char *orig = big;
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unsigned char c;
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for (;;) {
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if (dns_domain_equal(big,little)) return big - orig;
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c = *big++;
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if (!c) return 0;
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big += c;
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}
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}
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