packet.h

   1 /* $OpenBSD: packet.h,v 1.55 2010/11/13 23:27:50 djm Exp $ */
   2
   3 /*
   4  * Author: Tatu Ylonen <ylo@cs.hut.fi>
   5  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
   6  *                    All rights reserved
   7  * Interface for the packet protocol functions.
   8  *
   9  * As far as I am concerned, the code I have written for this software
  10  * can be used freely for any purpose.  Any derived versions of this
  11  * software must be clearly marked as such, and if the derived work is
  12  * incompatible with the protocol description in the RFC file, it must be
  13  * called by a name other than "ssh" or "Secure Shell".
  14  */
  15
  16 #ifndef PACKET_H
  17 #define PACKET_H
  18
  19 #include <termios.h>
  20
  21 #include <openssl/bn.h>
  22 #ifdef OPENSSL_HAS_ECC
  23 #include <openssl/ec.h>
  24 #endif
  25
  26 void     packet_set_connection(int, int);
  27 void     packet_set_timeout(int, int);
  28 void     packet_set_nonblocking(void);
  29 int      packet_get_connection_in(void);
  30 int      packet_get_connection_out(void);
  31 void     packet_close(void);
  32 void     packet_set_encryption_key(const u_char *, u_int, int);
  33 u_int    packet_get_encryption_key(u_char *);
  34 void     packet_set_protocol_flags(u_int);
  35 u_int    packet_get_protocol_flags(void);
  36 void     packet_start_compression(int);
  37 void     packet_set_interactive(int, int, int);
  38 int      packet_is_interactive(void);
  39 void     packet_set_server(void);
  40 void     packet_set_authenticated(void);
  41
  42 void     packet_start(u_char);
  43 void     packet_put_char(int ch);
  44 void     packet_put_int(u_int value);
  45 void     packet_put_int64(u_int64_t value);
  46 void     packet_put_bignum(BIGNUM * value);
  47 void     packet_put_bignum2(BIGNUM * value);
  48 #ifdef OPENSSL_HAS_ECC
  49 void     packet_put_ecpoint(const EC_GROUP *, const EC_POINT *);
  50 #endif
  51 void     packet_put_string(const void *buf, u_int len);
  52 void     packet_put_cstring(const char *str);
  53 void     packet_put_raw(const void *buf, u_int len);
  54 void     packet_send(void);
  55
  56 int      packet_read(void);
  57 void     packet_read_expect(int type);
  58 int      packet_read_poll(void);
  59 void     packet_process_incoming(const char *buf, u_int len);
  60 int      packet_read_seqnr(u_int32_t *seqnr_p);
  61 int      packet_read_poll_seqnr(u_int32_t *seqnr_p);
  62
  63 u_int    packet_get_char(void);
  64 u_int    packet_get_int(void);
  65 u_int64_t packet_get_int64(void);
  66 void     packet_get_bignum(BIGNUM * value);
  67 void     packet_get_bignum2(BIGNUM * value);
  68 #ifdef OPENSSL_HAS_ECC
  69 void     packet_get_ecpoint(const EC_GROUP *, EC_POINT *);
  70 #endif
  71 void    *packet_get_raw(u_int *length_ptr);
  72 void    *packet_get_string(u_int *length_ptr);
  73 char    *packet_get_cstring(u_int *length_ptr);
  74 void    *packet_get_string_ptr(u_int *length_ptr);
  75 void     packet_disconnect(const char *fmt,...) __attribute__((format(printf, 1, 2)));
  76 void     packet_send_debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
  77
  78 void     set_newkeys(int mode);
  79 int      packet_get_keyiv_len(int);
  80 void     packet_get_keyiv(int, u_char *, u_int);
  81 int      packet_get_keycontext(int, u_char *);
  82 void     packet_set_keycontext(int, u_char *);
  83 void     packet_get_state(int, u_int32_t *, u_int64_t *, u_int32_t *, u_int64_t *);
  84 void     packet_set_state(int, u_int32_t, u_int64_t, u_int32_t, u_int64_t);
  85 int      packet_get_ssh1_cipher(void);
  86 void     packet_set_iv(int, u_char *);
  87 void    *packet_get_newkeys(int);
  88
  89 void     packet_write_poll(void);
  90 void     packet_write_wait(void);
  91 int      packet_have_data_to_write(void);
  92 int      packet_not_very_much_data_to_write(void);
  93
  94 int      packet_connection_is_on_socket(void);
  95 int      packet_connection_is_ipv4(void);
  96 int      packet_remaining(void);
  97 void     packet_send_ignore(int);
  98 void     packet_add_padding(u_char);
  99
 100 void     tty_make_modes(int, struct termios *);
 101 void     tty_parse_modes(int, int *);
 102
 103 void     packet_set_alive_timeouts(int);
 104 int      packet_inc_alive_timeouts(void);
 105 int      packet_set_maxsize(u_int);
 106 u_int    packet_get_maxsize(void);
 107
 108 /* don't allow remaining bytes after the end of the message */
 109 #define packet_check_eom() \
 110 do { \
 111         int _len = packet_remaining(); \
 112         if (_len > 0) { \
 113                 logit("Packet integrity error (%d bytes remaining) at %s:%d", \
 114                     _len ,__FILE__, __LINE__); \
 115                 packet_disconnect("Packet integrity error."); \
 116         } \
 117 } while (0)
 118
 119 int      packet_need_rekeying(void);
 120 void     packet_set_rekey_limit(u_int32_t);
 121
 122 void     packet_backup_state(void);
 123 void     packet_restore_state(void);
 124
 125 void    *packet_get_input(void);
 126 void    *packet_get_output(void);
 127
 128 #endif                          /* PACKET_H */