56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* main.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/10/08 17:18:05 by jhalford #+# #+# */
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/* Updated: 2017/10/08 17:55:15 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "traceroute.h"
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int g_pid = -1;
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struct addrinfo *resolve_host(char *hostname, char ip[])
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{
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struct addrinfo *result;
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struct addrinfo hints;
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struct sockaddr_in *addr;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags |= AI_CANONNAME;
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if (getaddrinfo(hostname, NULL, &hints, &result) != 0)
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{
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perror("getaddrinfo");
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exit(1);
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}
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addr = (struct sockaddr_in*)result->ai_addr;
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inet_ntop(AF_INET, &(addr->sin_addr), ip, INET_ADDRSTRLEN);
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return (result);
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}
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int main(int ac, char **av)
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{
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struct addrinfo *result;
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char ip[INET_ADDRSTRLEN];
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if (ac != 2)
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{
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ft_usage("%s <addr>\n", av[0]);
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return (1);
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}
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result = resolve_host(av[1], ip);
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if (result->ai_next)
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printf("traceroute: Warning: %s has multiple addresses; using %s\n",
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result->ai_canonname, ip);
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printf("traceroute to %s (%s), %i hops max %i byte packets\n",
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result->ai_canonname, ip, 64, PACKETSIZE);
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traceroute(result->ai_addr);
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return (0);
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}
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