48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
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/* from Jan Safranek */
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#define BUF_SIZE 500
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int
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main(int argc, char *argv[])
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{
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struct addrinfo hints;
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struct addrinfo *result, *rp;
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int s;
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char buf[BUF_SIZE];
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if (argc != 2) {
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fprintf(stderr, "Usage: %s host\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = PF_INET6;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_flags = 0;
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hints.ai_protocol = 0;
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s = getaddrinfo(argv[1], NULL, &hints, &result);
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if (s != 0) {
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fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
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exit(EXIT_FAILURE);
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}
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for (rp = result; rp != NULL; rp = rp->ai_next) {
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if (rp->ai_family == PF_INET6)
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inet_ntop(PF_INET6, &((struct sockaddr_in6 *) rp->ai_addr)->sin6_addr, buf, BUF_SIZE);
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else
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inet_ntop(PF_INET, &((struct sockaddr_in *) rp->ai_addr)->sin_addr, buf, BUF_SIZE);
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printf("Address: %s\n", buf);
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}
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return 0;
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}
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