1 /* $OpenBSD: packet.h,v 1.49 2008/07/10 18:08:11 markus 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 23 void packet_set_connection(int, int); 24 void packet_set_timeout(int, int); 25 void packet_set_nonblocking(void); 26 int packet_get_connection_in(void); 27 int packet_get_connection_out(void); 28 void packet_close(void); 29 void packet_set_encryption_key(const u_char *, u_int, int); 30 u_int packet_get_encryption_key(u_char *); 31 void packet_set_protocol_flags(u_int); 32 u_int packet_get_protocol_flags(void); 33 void packet_start_compression(int); 34 void packet_set_interactive(int); 35 int packet_is_interactive(void); 36 void packet_set_server(void); 37 void packet_set_authenticated(void); 38 39 void packet_start(u_char); 40 void packet_put_char(int ch); 41 void packet_put_int(u_int value); 42 void packet_put_bignum(BIGNUM * value); 43 void packet_put_bignum2(BIGNUM * value); 44 void packet_put_string(const void *buf, u_int len); 45 void packet_put_cstring(const char *str); 46 void packet_put_raw(const void *buf, u_int len); 47 void packet_send(void); 48 49 int packet_read(void); 50 void packet_read_expect(int type); 51 int packet_read_poll(void); 52 void packet_process_incoming(const char *buf, u_int len); 53 int packet_read_seqnr(u_int32_t *seqnr_p); 54 int packet_read_poll_seqnr(u_int32_t *seqnr_p); 55 56 u_int packet_get_char(void); 57 u_int packet_get_int(void); 58 void packet_get_bignum(BIGNUM * value); 59 void packet_get_bignum2(BIGNUM * value); 60 void *packet_get_raw(u_int *length_ptr); 61 void *packet_get_string(u_int *length_ptr); 62 void *packet_get_string_ptr(u_int *length_ptr); 63 void packet_disconnect(const char *fmt,...) __attribute__((format(printf, 1, 2))); 64 void packet_send_debug(const char *fmt,...) __attribute__((format(printf, 1, 2))); 65 66 void set_newkeys(int mode); 67 int packet_get_keyiv_len(int); 68 void packet_get_keyiv(int, u_char *, u_int); 69 int packet_get_keycontext(int, u_char *); 70 void packet_set_keycontext(int, u_char *); 71 void packet_get_state(int, u_int32_t *, u_int64_t *, u_int32_t *, u_int64_t *); 72 void packet_set_state(int, u_int32_t, u_int64_t, u_int32_t, u_int64_t); 73 int packet_get_ssh1_cipher(void); 74 void packet_set_iv(int, u_char *); 75 76 void packet_write_poll(void); 77 void packet_write_wait(void); 78 int packet_have_data_to_write(void); 79 int packet_not_very_much_data_to_write(void); 80 81 int packet_connection_is_on_socket(void); 82 int packet_connection_is_ipv4(void); 83 int packet_remaining(void); 84 void packet_send_ignore(int); 85 void packet_add_padding(u_char); 86 87 void tty_make_modes(int, struct termios *); 88 void tty_parse_modes(int, int *); 89 90 extern u_int max_packet_size; 91 extern int keep_alive_timeouts; 92 int packet_set_maxsize(u_int); 93 #define packet_get_maxsize() max_packet_size 94 95 /* don't allow remaining bytes after the end of the message */ 96 #define packet_check_eom() \ 97 do { \ 98 int _len = packet_remaining(); \ 99 if (_len > 0) { \ 100 logit("Packet integrity error (%d bytes remaining) at %s:%d", \ 101 _len ,__FILE__, __LINE__); \ 102 packet_disconnect("Packet integrity error."); \ 103 } \ 104 } while (0) 105 106 int packet_need_rekeying(void); 107 void packet_set_rekey_limit(u_int32_t); 108 109 #endif /* PACKET_H */ 110