39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* forge_ip.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/10/07 18:02:39 by jhalford #+# #+# */
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/* Updated: 2017/10/08 15:52:39 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "net.h"
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void ip_hdrinit(struct ip *header)
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{
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memset(header, 0, sizeof(*header));
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header->ip_v = 4;
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header->ip_hl = 5;
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header->ip_tos = 0;
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header->ip_len = 0;
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header->ip_id = ntohl(epoch_micro());
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header->ip_off = 0;
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header->ip_ttl = 255;
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header->ip_p = 0;
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header->ip_sum = 0;
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memset(&header->ip_src, 0, sizeof(struct in_addr));
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memset(&header->ip_dst, 0, sizeof(struct in_addr));
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}
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void ip_load_icmp(struct icmp *icmp, void *buf)
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{
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struct ip *ip;
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int hlen;
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ip = buf;
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hlen = ip->ip_hl << 2;
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ft_memcpy(icmp, buf + hlen, sizeof(struct icmp));
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}
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