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/*
* netsniff-ng - the packet sniffing beast
* Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
* Subject to the GPL, version 2.
*
* Encapsulating Security Payload described in RFC4303
*/
#include <stdio.h>
#include <stdint.h>
#include <netinet/in.h> /* for ntohs() */
#include "proto.h"
#include "built_in.h"
#include "pkt_buff.h"
struct esp_hdr {
uint32_t h_spi;
uint32_t h_sn;
} __packed;
static void esp(struct pkt_buff *pkt)
{
struct esp_hdr *esp_ops;
esp_ops = (struct esp_hdr *) pkt_pull(pkt, sizeof(*esp_ops));
if (esp_ops == NULL)
return;
tprintf(" [ ESP ");
tprintf("SPI (0x%x), ", ntohl(esp_ops->h_spi));
tprintf("SN (0x%x)", ntohl(esp_ops->h_sn));
tprintf(" ]\n");
}
static void esp_less(struct pkt_buff *pkt)
{
struct esp_hdr *esp_ops;
esp_ops = (struct esp_hdr *) pkt_pull(pkt, sizeof(*esp_ops));
if (esp_ops == NULL)
return;
tprintf(" ESP");
}
struct protocol ip_esp_ops = {
.key = 0x32,
.print_full = esp,
.print_less = esp_less,
};
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