1 /* $OpenBSD: packet.h,v 1.35 2002/06/19 18:01:00 markus Exp $ */ 2 /* $FreeBSD$ */ 3 4 /* 5 * Author: Tatu Ylonen <ylo@cs.hut.fi> 6 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 7 * All rights reserved 8 * Interface for the packet protocol functions. 9 * 10 * As far as I am concerned, the code I have written for this software 11 * can be used freely for any purpose. Any derived versions of this 12 * software must be clearly marked as such, and if the derived work is 13 * incompatible with the protocol description in the RFC file, it must be 14 * called by a name other than "ssh" or "Secure Shell". 15 */ 16 17 #ifndef PACKET_H 18 #define PACKET_H 19 20 #include <openssl/bn.h> 21 22 void packet_set_connection(int, int); 23 void packet_set_nonblocking(void); 24 int packet_get_connection_in(void); 25 int packet_get_connection_out(void); 26 void packet_close(void); 27 void packet_set_encryption_key(const u_char *, u_int, int); 28 u_int packet_get_encryption_key(u_char *); 29 void packet_set_protocol_flags(u_int); 30 u_int packet_get_protocol_flags(void); 31 void packet_start_compression(int); 32 void packet_set_interactive(int); 33 int packet_is_interactive(void); 34 35 void packet_start(u_char); 36 void packet_put_char(int ch); 37 void packet_put_int(u_int value); 38 void packet_put_bignum(BIGNUM * value); 39 void packet_put_bignum2(BIGNUM * value); 40 void packet_put_string(const void *buf, u_int len); 41 void packet_put_cstring(const char *str); 42 void packet_put_raw(const void *buf, u_int len); 43 void packet_send(void); 44 45 int packet_read(void); 46 void packet_read_expect(int type); 47 int packet_read_poll(void); 48 void packet_process_incoming(const char *buf, u_int len); 49 int packet_read_seqnr(u_int32_t *seqnr_p); 50 int packet_read_poll_seqnr(u_int32_t *seqnr_p); 51 52 u_int packet_get_char(void); 53 u_int packet_get_int(void); 54 void packet_get_bignum(BIGNUM * value); 55 void packet_get_bignum2(BIGNUM * value); 56 void *packet_get_raw(int *length_ptr); 57 void *packet_get_string(u_int *length_ptr); 58 void packet_disconnect(const char *fmt,...) __attribute__((format(printf, 1, 2))); 59 void packet_send_debug(const char *fmt,...) __attribute__((format(printf, 1, 2))); 60 61 void set_newkeys(int mode); 62 int packet_get_keyiv_len(int); 63 void packet_get_keyiv(int, u_char *, u_int); 64 int packet_get_keycontext(int, u_char *); 65 void packet_set_keycontext(int, u_char *); 66 u_int32_t packet_get_seqnr(int); 67 void packet_set_seqnr(int, u_int32_t); 68 int packet_get_ssh1_cipher(void); 69 void packet_set_iv(int, u_char *); 70 71 void packet_write_poll(void); 72 void packet_write_wait(void); 73 int packet_have_data_to_write(void); 74 int packet_not_very_much_data_to_write(void); 75 76 int packet_connection_is_on_socket(void); 77 int packet_connection_is_ipv4(void); 78 int packet_remaining(void); 79 void packet_send_ignore(int); 80 void packet_add_padding(u_char); 81 82 void tty_make_modes(int, struct termios *); 83 void tty_parse_modes(int, int *); 84 85 extern int max_packet_size; 86 int packet_set_maxsize(int); 87 #define packet_get_maxsize() max_packet_size 88 89 /* don't allow remaining bytes after the end of the message */ 90 #define packet_check_eom() \ 91 do { \ 92 int _len = packet_remaining(); \ 93 if (_len > 0) { \ 94 log("Packet integrity error (%d bytes remaining) at %s:%d", \ 95 _len ,__FILE__, __LINE__); \ 96 packet_disconnect("Packet integrity error."); \ 97 } \ 98 } while (0) 99 100 #endif /* PACKET_H */ 101