-int trusts_parsecidr(const char *host, uint32_t *ip, short *mask) {
- unsigned int octet1 = 0, octet2 = 0, octet3 = 0, octet4 = 0, umask = 32;
-
- if(sscanf(host, "%u.%u.%u.%u/%u", &octet1, &octet2, &octet3, &octet4, &umask) != 5)
- if(sscanf(host, "%u.%u.%u/%u", &octet1, &octet2, &octet3, &umask) != 4)
- if(sscanf(host, "%u.%u/%u", &octet1, &octet2, &umask) != 3)
- if(sscanf(host, "%u/%u", &octet1, &umask) != 2)
- if(sscanf(host, "%u.%u.%u.%u", &octet1, &octet2, &octet3, &octet4) != 4)
- return 0;
-
- if(octet1 > 255 || octet2 > 255 || octet3 > 255 || octet4 > 255 || umask > 32)
- return 0;
-
- *ip = (octet1 << 24) | (octet2 << 16) | (octet3 << 8) | octet4;
- *mask = umask;
-
- return 1;
-}
-
-/* returns mask pre-anded */
-int trusts_str2cidr(const char *host, uint32_t *ip, uint32_t *mask) {
- uint32_t result;
- short smask;
-
- if(!trusts_parsecidr(host, &result, &smask))
- return 0;
-
- if(smask == 0) {
- *mask = 0;
- } else {
- *mask = 0xffffffff << (32 - smask);
- }
- *ip = result & *mask;
-
- return 1;
-}
-
-char *trusts_cidr2str(uint32_t ip, uint32_t mask) {
- static char buf[100];
- char maskbuf[10];
-
- if(mask != 0) {
- /* count number of trailing zeros */
- float f = (float)(mask & -mask);
-
- mask = 32 - ((*(unsigned int *)&f >> 23) - 0x7f);
- }
-
- if(mask < 32) {
- snprintf(maskbuf, sizeof(maskbuf), "/%u", mask);
- } else {
- maskbuf[0] = '\0';
- }
-
- snprintf(buf, sizeof(buf), "%u.%u.%u.%u%s", (ip >> 24) & 0xff, (ip >> 16) & 0xff, (ip >> 8) & 0xff, ip & 0xff, maskbuf);
-
- return buf;
-}
-