diff options
Diffstat (limited to 'proto_ip_esp.c')
| -rw-r--r-- | proto_ip_esp.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/proto_ip_esp.c b/proto_ip_esp.c new file mode 100644 index 0000000..cc4e06e --- /dev/null +++ b/proto_ip_esp.c @@ -0,0 +1,53 @@ +/* + * 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 "protos.h" +#include "dissector_eth.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, +}; |