/* Copyright (C) Uppsala University * * This file is distributed under the terms of the GNU general Public * License (GPL), see the file LICENSE * * Author: Erik Nordstr?m, <erikn@it.uu.se> */#ifndef _DSR_PKT_H#define _DSR_PKT_H#ifdef NS2#include <packet.h>#include <ip.h>#else#include <linux/in.h>#endif#define MAX_RREP_OPTS 10#define MAX_RERR_OPTS 10#define MAX_ACK_OPTS  10#define DEFAULT_TAILROOM 128/* Internal representation of a packet. For portability */struct dsr_pkt {	struct in_addr src;	/* IP level data */	struct in_addr dst;	struct in_addr nxt_hop;	struct in_addr prv_hop;	int flags;	int salvage;#ifdef NS2	union {		struct hdr_mac *ethh;		unsigned char *raw;	} mac;	struct hdr_ip ip_data;	union {		struct hdr_ip *iph;		char *raw;	} nh;#else	union {		struct ethhdr *ethh;		char *raw;	} mac;	union {		struct iphdr *iph;		char *raw;	} nh;	char ip_data[60];#endif	struct {		union {			struct dsr_opt_hdr *opth;			char *raw;		};				char *tail, *end;  	} dh;			int num_rrep_opts, num_rerr_opts, num_rreq_opts, num_ack_opts;	struct dsr_srt_opt *srt_opt;	struct dsr_rreq_opt *rreq_opt;	/* Can only be one */	struct dsr_rrep_opt *rrep_opt[MAX_RREP_OPTS];	struct dsr_rerr_opt *rerr_opt[MAX_RERR_OPTS];	struct dsr_ack_opt *ack_opt[MAX_ACK_OPTS];	struct dsr_ack_req_opt *ack_req_opt;	struct dsr_srt *srt;	/* Source route */	int payload_len;#ifdef NS2	AppData *payload;	Packet *p;#else	char *payload;	struct sk_buff *skb;#endif};/* Flags: */#define PKT_PROMISC_RECV 0x01#define PKT_REQUEST_ACK  0x02#define PKT_PASSIVE_ACK  0x04#define PKT_XMIT_JITTER  0x08/* Packet actions: */#define DSR_PKT_NONE           1#define DSR_PKT_SRT_REMOVE     (DSR_PKT_NONE << 2)#define DSR_PKT_SEND_ICMP      (DSR_PKT_NONE << 3)#define DSR_PKT_SEND_RREP      (DSR_PKT_NONE << 4)#define DSR_PKT_SEND_BUFFERED  (DSR_PKT_NONE << 5)#define DSR_PKT_SEND_ACK       (DSR_PKT_NONE << 6)#define DSR_PKT_FORWARD        (DSR_PKT_NONE << 7)#define DSR_PKT_FORWARD_RREQ   (DSR_PKT_NONE << 8)#define DSR_PKT_DROP           (DSR_PKT_NONE << 9)#define DSR_PKT_ERROR          (DSR_PKT_NONE << 10)#define DSR_PKT_DELIVER        (DSR_PKT_NONE << 11)#define DSR_PKT_ACTION_LAST    (12)static inline int dsr_pkt_opts_len(struct dsr_pkt *dp){	return dp->dh.tail - dp->dh.raw;}static inline int dsr_pkt_tailroom(struct dsr_pkt *dp){	return dp->dh.end - dp->dh.tail;}#ifdef NS2struct dsr_pkt *dsr_pkt_alloc(Packet * p);#elsestruct dsr_pkt *dsr_pkt_alloc(struct sk_buff *skb);#endifchar *dsr_pkt_alloc_opts(struct dsr_pkt *dp, int len);char *dsr_pkt_alloc_opts_expand(struct dsr_pkt *dp, int len);void dsr_pkt_free(struct dsr_pkt *dp);int dsr_pkt_free_opts(struct dsr_pkt *dp);#endif				/* _DSR_PKT_H */