38 lines
893 B
C
38 lines
893 B
C
#include <stdio.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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main(int argc, char **argv)
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{
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struct hostent h;
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char buf[4096];
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struct in_addr addr;
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int herr;
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int i;
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for (argc--, argv++; argc > 0; argc--, argv++) {
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if (! inet_aton(*argv, &addr)) {
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fprintf(stderr, "failed to convert address: %s\n",
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*argv);
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}
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if (! gethostbyaddr_r(&addr, sizeof(addr), AF_INET, &h, buf,
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sizeof(buf), &herr)) {
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fprintf(stderr, "gethostbyaddr failed: %s\n",
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hstrerror(herr));
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} else {
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printf("name = %s, addrtype = %d, length = %d\n",
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h.h_name, h.h_addrtype, h.h_length);
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for (i = 0; h.h_aliases[i]; i++) {
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printf("\talias[%d]: %s\n", i, h.h_aliases[i]);
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}
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for (i = 0; h.h_addr_list[i]; i++) {
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printf("\taddress[%d]: %s\n", i,
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inet_ntoa(*(struct in_addr *)h.h_addr_list[i]));
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}
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}
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}
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}
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