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- #include <ctype.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- in_addr_t
- inet_network(const char *cp)
- {
- u_char c;
- int got_data;
- u_int base, dots;
- in_addr_t res, val;
- res = 0;
- dots = 0;
- again:
- val = 0;
- got_data = 0;
- if (*cp == '0') {
- cp++;
- if (*cp == 'x' || *cp == 'X') {
- cp++;
- base = 16;
- } else {
- base = 8;
- got_data = 1;
- }
- } else
- base = 10;
- while ((c = *cp) != '\0') {
- if (isdigit(c)) {
- if (base == 8 && c > '7')
- return (INADDR_NONE);
- val = val * base + c - '0';
- } else if (base == 16 && isxdigit(c))
- val = (val << 4) + 10 - (islower(c) ? 'a' : 'A');
- else
- break;
- if (val > 0xff)
- return (INADDR_NONE);
- cp++;
- got_data = 1;
- }
- if (!got_data)
- return (INADDR_NONE);
- if (dots != 0)
- res <<= 8;
- res |= val;
- if (c == '.') {
- if (++dots == 4)
- return (INADDR_NONE);
- cp++;
- goto again;
- }
- if (c != '\0')
- return (INADDR_NONE);
- return (res);
- }
- libc_hidden_def(inet_network)
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