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/*
20140108
Jan Mojzis
Public domain.
*/
#ifndef PACKET_H____
#define PACKET_H____
#include "buf.h"
#include "crypto_uint32.h"
#include "crypto_uint8.h"
#include "sshcrypto.h"
#include "limit.h"
#include "channel.h"
#define PACKET_UNAUTHENTICATED_MESSAGES 30
#define PACKET_LIMIT 32768
#define PACKET_FULLLIMIT 35000
#define PACKET_RECVLIMIT 131072
#define PACKET_ZEROBYTES 64
struct packet {
/* flags */
int flagkeys;
int flagauthorized;
int flagrekeying;
/* channel */
int flageofsent;
int flagclosesent;
int flagchanneleofreceived;
/* packet id */
crypto_uint32 sendpacketid;
crypto_uint32 receivepacketid;
/* keys */
unsigned char serverkey[sshcrypto_cipher_KEYMAX];
unsigned char clientkey[sshcrypto_cipher_KEYMAX];
unsigned char servermackey[sshcrypto_cipher_KEYMAX];
unsigned char clientmackey[sshcrypto_cipher_KEYMAX];
unsigned char servernonce[sshcrypto_cipher_KEYMAX];
unsigned char clientnonce[sshcrypto_cipher_KEYMAX];
unsigned char sessionid[sshcrypto_hash_MAX];
char name[LOGIN_NAME_MAX + 1];
crypto_uint8 kex_packet_follows;
crypto_uint8 kex_guess;
/* buffers */
unsigned char hellosendspace[256];
unsigned char helloreceivespace[256];
unsigned char kexsendspace[1024];
unsigned char kexrecvspace[65536];
unsigned char hashbufspace[65536];
struct buf hellosend;
struct buf helloreceive;
struct buf kexsend;
struct buf kexrecv;
struct buf hashbuf;
/* send/recv */
unsigned char recvbufspace[4 * PACKET_FULLLIMIT + 1 + PACKET_ZEROBYTES];
unsigned char sendbufspace[4 * PACKET_FULLLIMIT + 1];
struct buf recvbuf;
struct buf sendbuf;
crypto_uint32 packet_length;
};
/* packet.c */
extern struct packet packet;
extern void packet_purge(void);
extern void packet_init(void);
/* packet_send.c */
extern int packet_sendisready(void);
extern int packet_send(void);
extern int packet_sendall(void);
/* packet_recv.c */
extern int packet_recvisready(void);
extern int packet_recv(void);
/* packet_get.c */
extern int packet_get(struct buf *, crypto_uint8);
extern int packet_getall(struct buf *, crypto_uint8);
/* packet_put.c */
extern void packet_put(struct buf *);
extern int packet_putisready(void);
/* packet_hello.c */
extern int packet_hello_send(void);
extern int packet_hello_receive(void);
/* packet_kex.c */
extern int packet_kex_send(void);
extern int packet_kex_receive(void);
/* packet_kexdh.c */
extern int packet_kexdh(const char *, struct buf *, struct buf *);
/* packet_auth.c */
extern int packet_auth(struct buf *, struct buf *, int);
/* packet_channel_open.c */
extern int packet_channel_open(struct buf *, struct buf *);
/* packet_channel_request.c */
extern int packet_channel_request(struct buf *, struct buf *, const char *);
/* packet_channel_recv.c */
extern int packet_channel_recv_data(struct buf *);
extern int packet_channel_recv_extendeddata(struct buf *);
extern int packet_channel_recv_windowadjust(struct buf *);
extern int packet_channel_recv_eof(struct buf *);
extern int packet_channel_recv_close(struct buf *);
/* packet_channel_send.c */
extern void packet_channel_send_data(struct buf *);
extern void packet_channel_send_extendeddata(struct buf *);
extern int packet_channel_send_windowadjust(struct buf *);
extern void packet_channel_send_eof(struct buf *);
extern int packet_channel_send_close(struct buf *, int, int);
/* packet_unimplemented.c */
extern int packet_unimplemented(struct buf *);
#endif
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