124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <time.h>
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#include "ipfs/namesys/namesys.h"
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#include "ipfs/namesys/isdomain.h"
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void ipfs_isdomain_to_upper(char *dst, char *src)
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{
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while(*src) {
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*dst++ = toupper(*src++);
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}
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*dst = '\0';
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}
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int ipfs_isdomain_has_suffix (char *s, char *suf)
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{
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char *p;
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p = s + strlen(s) - strlen(suf);
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return strcmp(p, suf) == 0;
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}
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int ipfs_isdomain_is_at_array(tlds *a, char *s)
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{
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char str[strlen(s)+1];
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ipfs_isdomain_to_upper(str, s);
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while(a->str) {
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if (strcmp(a->str, str) == 0) {
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return a->condition;
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}
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a++;
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}
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return 0;
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}
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int ipfs_isdomain_match_string (char *d)
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{
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char str[strlen(d)+1], *p = str, *l;
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ipfs_isdomain_to_upper(str, d);
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// l point to last two chars.
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l = p + strlen(p) - 2;
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// can't start with a dot
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if (*p == '.') {
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return 0; // invalid
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}
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// last 2 chars can't be a dot or a number.
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if ((*l >= 'A' && *l <= 'Z') && (l[1] >= 'A' && l[1] <= 'Z')) {
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while (*p) {
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if ((*p >= 'A' && *p <= 'Z') || (*p >= '0' && *p <= '9') || *p == '.' || *p == '-') {
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p++;
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} else {
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return 0; // invalid
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}
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}
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} else {
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return 0; // invalid
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}
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return 1; // valid
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}
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// ipfs_isdomain_is_icann_tld returns whether the given string is a TLD (Top Level Domain),
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// according to ICANN. Well, really according to the TLDs listed in this
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// package.
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int ipfs_isdomain_is_icann_tld(char *s)
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{
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return ipfs_isdomain_is_at_array (TLDs, s);
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}
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// ipfs_isdomain_is_extended_tld returns whether the given string is a TLD (Top Level Domain),
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// extended with a few other "TLDs", .bit, .onion
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int ipfs_isdomain_is_extended_tld (char *s)
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{
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return ipfs_isdomain_is_at_array (ExtendedTLDs, s);
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}
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// ipfs_isdomain_is_tld returns whether the given string is a TLD (according to ICANN, or
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// in the set of ExtendedTLDs listed in this package.
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int ipfs_isdomain_is_tld (char *s)
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{
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return ipfs_isdomain_is_icann_tld (s) || ipfs_isdomain_is_extended_tld(s);
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}
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// ipfs_isdomain_is_domain returns whether given string is a domain.
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// It first checks the TLD, and then uses a regular expression.
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int ipfs_isdomain_is_domain (char *s)
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{
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int err;
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char *str, *tld;
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str = malloc(strlen(s) + 1);
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if (!str) {
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return ErrAllocFailed;
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}
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memcpy(str, s, strlen(s) + 1);
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s = str; // work with local copy.
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if (ipfs_isdomain_has_suffix (s, ".")) {
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s[strlen(s) - 1] = '\0';
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}
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tld = strrchr(s, '.');
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if (!tld) { // don't have a dot.
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return 0;
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}
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tld++; // ignore last dot
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if (!ipfs_isdomain_is_tld (tld)) {
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return 0;
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}
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err = ipfs_isdomain_match_string(s);
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free (s);
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return err;
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}
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