packet.h revision 296781
1/* $OpenBSD: packet.h,v 1.70 2016/02/08 10:57:07 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#ifdef WITH_OPENSSL 22# include <openssl/bn.h> 23# ifdef OPENSSL_HAS_ECC 24# include <openssl/ec.h> 25# else /* OPENSSL_HAS_ECC */ 26# define EC_KEY void 27# define EC_GROUP void 28# define EC_POINT void 29# endif /* OPENSSL_HAS_ECC */ 30#else /* WITH_OPENSSL */ 31# define BIGNUM void 32# define EC_KEY void 33# define EC_GROUP void 34# define EC_POINT void 35#endif /* WITH_OPENSSL */ 36 37#include <signal.h> 38#include "openbsd-compat/sys-queue.h" 39 40struct kex; 41struct sshkey; 42struct sshbuf; 43struct session_state; /* private session data */ 44 45#include "dispatch.h" /* typedef, DISPATCH_MAX */ 46 47struct key_entry { 48 TAILQ_ENTRY(key_entry) next; 49 struct sshkey *key; 50}; 51 52struct ssh { 53 /* Session state */ 54 struct session_state *state; 55 56 /* Key exchange */ 57 struct kex *kex; 58 59 /* cached remote ip address and port*/ 60 char *remote_ipaddr; 61 int remote_port; 62 63 /* Dispatcher table */ 64 dispatch_fn *dispatch[DISPATCH_MAX]; 65 /* number of packets to ignore in the dispatcher */ 66 int dispatch_skip_packets; 67 68 /* datafellows */ 69 int compat; 70 71 /* Lists for private and public keys */ 72 TAILQ_HEAD(, key_entry) private_keys; 73 TAILQ_HEAD(, key_entry) public_keys; 74 75 /* APP data */ 76 void *app_data; 77}; 78 79struct ssh *ssh_alloc_session_state(void); 80struct ssh *ssh_packet_set_connection(struct ssh *, int, int); 81void ssh_packet_set_timeout(struct ssh *, int, int); 82int ssh_packet_stop_discard(struct ssh *); 83int ssh_packet_connection_af(struct ssh *); 84void ssh_packet_set_nonblocking(struct ssh *); 85int ssh_packet_get_connection_in(struct ssh *); 86int ssh_packet_get_connection_out(struct ssh *); 87void ssh_packet_close(struct ssh *); 88void ssh_packet_set_encryption_key(struct ssh *, const u_char *, u_int, int); 89int ssh_packet_is_rekeying(struct ssh *); 90void ssh_packet_set_protocol_flags(struct ssh *, u_int); 91u_int ssh_packet_get_protocol_flags(struct ssh *); 92int ssh_packet_start_compression(struct ssh *, int); 93void ssh_packet_set_tos(struct ssh *, int); 94void ssh_packet_set_interactive(struct ssh *, int, int, int); 95int ssh_packet_is_interactive(struct ssh *); 96void ssh_packet_set_server(struct ssh *); 97void ssh_packet_set_authenticated(struct ssh *); 98 99int ssh_packet_send1(struct ssh *); 100int ssh_packet_send2_wrapped(struct ssh *); 101int ssh_packet_send2(struct ssh *); 102 103int ssh_packet_read(struct ssh *); 104int ssh_packet_read_expect(struct ssh *, u_int type); 105int ssh_packet_read_poll(struct ssh *); 106int ssh_packet_read_poll1(struct ssh *, u_char *); 107int ssh_packet_read_poll2(struct ssh *, u_char *, u_int32_t *seqnr_p); 108int ssh_packet_process_incoming(struct ssh *, const char *buf, u_int len); 109int ssh_packet_read_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); 110int ssh_packet_read_poll_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); 111 112const void *ssh_packet_get_string_ptr(struct ssh *, u_int *length_ptr); 113void ssh_packet_disconnect(struct ssh *, const char *fmt, ...) 114 __attribute__((format(printf, 2, 3))) 115 __attribute__((noreturn)); 116void ssh_packet_send_debug(struct ssh *, const char *fmt, ...) __attribute__((format(printf, 2, 3))); 117 118int ssh_set_newkeys(struct ssh *, int mode); 119void ssh_packet_get_bytes(struct ssh *, u_int64_t *, u_int64_t *); 120 121typedef void *(ssh_packet_comp_alloc_func)(void *, u_int, u_int); 122typedef void (ssh_packet_comp_free_func)(void *, void *); 123void ssh_packet_set_compress_hooks(struct ssh *, void *, 124 ssh_packet_comp_alloc_func *, ssh_packet_comp_free_func *); 125 126int ssh_packet_write_poll(struct ssh *); 127int ssh_packet_write_wait(struct ssh *); 128int ssh_packet_have_data_to_write(struct ssh *); 129int ssh_packet_not_very_much_data_to_write(struct ssh *); 130 131int ssh_packet_connection_is_on_socket(struct ssh *); 132int ssh_packet_remaining(struct ssh *); 133void ssh_packet_send_ignore(struct ssh *, int); 134 135void tty_make_modes(int, struct termios *); 136void tty_parse_modes(int, int *); 137 138void ssh_packet_set_alive_timeouts(struct ssh *, int); 139int ssh_packet_inc_alive_timeouts(struct ssh *); 140int ssh_packet_set_maxsize(struct ssh *, u_int); 141u_int ssh_packet_get_maxsize(struct ssh *); 142 143int ssh_packet_get_state(struct ssh *, struct sshbuf *); 144int ssh_packet_set_state(struct ssh *, struct sshbuf *); 145 146const char *ssh_remote_ipaddr(struct ssh *); 147int ssh_remote_port(struct ssh *); 148 149void ssh_packet_set_rekey_limits(struct ssh *, u_int64_t, time_t); 150time_t ssh_packet_get_rekey_timeout(struct ssh *); 151 152void *ssh_packet_get_input(struct ssh *); 153void *ssh_packet_get_output(struct ssh *); 154 155/* new API */ 156int sshpkt_start(struct ssh *ssh, u_char type); 157int sshpkt_send(struct ssh *ssh); 158int sshpkt_disconnect(struct ssh *, const char *fmt, ...) 159 __attribute__((format(printf, 2, 3))); 160int sshpkt_add_padding(struct ssh *, u_char); 161void sshpkt_fatal(struct ssh *ssh, const char *tag, int r); 162 163int sshpkt_put(struct ssh *ssh, const void *v, size_t len); 164int sshpkt_putb(struct ssh *ssh, const struct sshbuf *b); 165int sshpkt_put_u8(struct ssh *ssh, u_char val); 166int sshpkt_put_u32(struct ssh *ssh, u_int32_t val); 167int sshpkt_put_u64(struct ssh *ssh, u_int64_t val); 168int sshpkt_put_string(struct ssh *ssh, const void *v, size_t len); 169int sshpkt_put_cstring(struct ssh *ssh, const void *v); 170int sshpkt_put_stringb(struct ssh *ssh, const struct sshbuf *v); 171int sshpkt_put_ec(struct ssh *ssh, const EC_POINT *v, const EC_GROUP *g); 172int sshpkt_put_bignum1(struct ssh *ssh, const BIGNUM *v); 173int sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v); 174 175int sshpkt_get(struct ssh *ssh, void *valp, size_t len); 176int sshpkt_get_u8(struct ssh *ssh, u_char *valp); 177int sshpkt_get_u32(struct ssh *ssh, u_int32_t *valp); 178int sshpkt_get_u64(struct ssh *ssh, u_int64_t *valp); 179int sshpkt_get_string(struct ssh *ssh, u_char **valp, size_t *lenp); 180int sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp); 181int sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp); 182int sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g); 183int sshpkt_get_bignum1(struct ssh *ssh, BIGNUM *v); 184int sshpkt_get_bignum2(struct ssh *ssh, BIGNUM *v); 185int sshpkt_get_end(struct ssh *ssh); 186const u_char *sshpkt_ptr(struct ssh *, size_t *lenp); 187 188/* OLD API */ 189extern struct ssh *active_state; 190#include "opacket.h" 191 192#if !defined(WITH_OPENSSL) 193# undef BIGNUM 194# undef EC_KEY 195# undef EC_GROUP 196# undef EC_POINT 197#elif !defined(OPENSSL_HAS_ECC) 198# undef EC_KEY 199# undef EC_GROUP 200# undef EC_POINT 201#endif 202 203#endif /* PACKET_H */ 204