1 /* $OpenBSD: packet.h,v 1.43 2005/07/25 11:59:40 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 <openssl/bn.h> 20 21 void packet_set_connection(int, int); 22 void packet_set_nonblocking(void); 23 int packet_get_connection_in(void); 24 int packet_get_connection_out(void); 25 void packet_close(void); 26 void packet_set_encryption_key(const u_char *, u_int, int); 27 u_int packet_get_encryption_key(u_char *); 28 void packet_set_protocol_flags(u_int); 29 u_int packet_get_protocol_flags(void); 30 void packet_start_compression(int); 31 void packet_set_interactive(int); 32 int packet_is_interactive(void); 33 void packet_set_server(void); 34 void packet_set_authenticated(void); 35 36 void packet_start(u_char); 37 void packet_put_char(int ch); 38 void packet_put_int(u_int value); 39 void packet_put_bignum(BIGNUM * value); 40 void packet_put_bignum2(BIGNUM * value); 41 void packet_put_string(const void *buf, u_int len); 42 void packet_put_cstring(const char *str); 43 void packet_put_raw(const void *buf, u_int len); 44 void packet_send(void); 45 46 int packet_read(void); 47 void packet_read_expect(int type); 48 int packet_read_poll(void); 49 void packet_process_incoming(const char *buf, u_int len); 50 int packet_read_seqnr(u_int32_t *seqnr_p); 51 int packet_read_poll_seqnr(u_int32_t *seqnr_p); 52 53 u_int packet_get_char(void); 54 u_int packet_get_int(void); 55 void packet_get_bignum(BIGNUM * value); 56 void packet_get_bignum2(BIGNUM * value); 57 void *packet_get_raw(u_int *length_ptr); 58 void *packet_get_string(u_int *length_ptr); 59 void packet_disconnect(const char *fmt,...) __attribute__((format(printf, 1, 2))); 60 void packet_send_debug(const char *fmt,...) __attribute__((format(printf, 1, 2))); 61 62 void set_newkeys(int mode); 63 int packet_get_keyiv_len(int); 64 void packet_get_keyiv(int, u_char *, u_int); 65 int packet_get_keycontext(int, u_char *); 66 void packet_set_keycontext(int, u_char *); 67 void packet_get_state(int, u_int32_t *, u_int64_t *, u_int32_t *); 68 void packet_set_state(int, u_int32_t, u_int64_t, u_int32_t); 69 int packet_get_ssh1_cipher(void); 70 void packet_set_iv(int, u_char *); 71 72 void packet_write_poll(void); 73 void packet_write_wait(void); 74 int packet_have_data_to_write(void); 75 int packet_not_very_much_data_to_write(void); 76 77 int packet_connection_is_on_socket(void); 78 int packet_connection_is_ipv4(void); 79 int packet_remaining(void); 80 void packet_send_ignore(int); 81 void packet_add_padding(u_char); 82 83 void tty_make_modes(int, struct termios *); 84 void tty_parse_modes(int, int *); 85 86 extern u_int max_packet_size; 87 int packet_set_maxsize(u_int); 88 #define packet_get_maxsize() max_packet_size 89 90 /* don't allow remaining bytes after the end of the message */ 91 #define packet_check_eom() \ 92 do { \ 93 int _len = packet_remaining(); \ 94 if (_len > 0) { \ 95 logit("Packet integrity error (%d bytes remaining) at %s:%d", \ 96 _len ,__FILE__, __LINE__); \ 97 packet_disconnect("Packet integrity error."); \ 98 } \ 99 } while (0) 100 101 int packet_need_rekeying(void); 102 void packet_set_rekey_limit(u_int32_t); 103 104 #endif /* PACKET_H */ 105