diff options
Diffstat (limited to 'packet.h')
| -rw-r--r-- | packet.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/packet.h b/packet.h new file mode 100644 index 0000000..176488b --- /dev/null +++ b/packet.h @@ -0,0 +1,223 @@ +/* $OpenBSD: packet.h,v 1.94 2022/01/22 00:49:34 djm Exp $ */ + +/* + * Author: Tatu Ylonen <ylo@cs.hut.fi> + * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland + * All rights reserved + * Interface for the packet protocol functions. + * + * As far as I am concerned, the code I have written for this software + * can be used freely for any purpose. Any derived versions of this + * software must be clearly marked as such, and if the derived work is + * incompatible with the protocol description in the RFC file, it must be + * called by a name other than "ssh" or "Secure Shell". + */ + +#ifndef PACKET_H +#define PACKET_H + +#include <termios.h> + +#ifdef WITH_OPENSSL +# include <openssl/bn.h> +# ifdef OPENSSL_HAS_ECC +# include <openssl/ec.h> +# else /* OPENSSL_HAS_ECC */ +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +# endif /* OPENSSL_HAS_ECC */ +#else /* WITH_OPENSSL */ +# define BIGNUM void +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +#endif /* WITH_OPENSSL */ + +#include <signal.h> +#include "openbsd-compat/sys-queue.h" + +struct kex; +struct sshkey; +struct sshbuf; +struct session_state; /* private session data */ + +#include "dispatch.h" /* typedef, DISPATCH_MAX */ + +struct key_entry { + TAILQ_ENTRY(key_entry) next; + struct sshkey *key; +}; + +struct ssh { + /* Session state */ + struct session_state *state; + + /* Key exchange */ + struct kex *kex; + + /* cached local and remote ip addresses and ports */ + char *remote_ipaddr; + int remote_port; + char *local_ipaddr; + int local_port; + char *rdomain_in; + + /* Optional preamble for log messages (e.g. username) */ + char *log_preamble; + + /* Dispatcher table */ + dispatch_fn *dispatch[DISPATCH_MAX]; + /* number of packets to ignore in the dispatcher */ + int dispatch_skip_packets; + + /* datafellows */ + int compat; + + /* Lists for private and public keys */ + TAILQ_HEAD(, key_entry) private_keys; + TAILQ_HEAD(, key_entry) public_keys; + + /* Client/Server authentication context */ + void *authctxt; + + /* Channels context */ + struct ssh_channels *chanctxt; + + /* APP data */ + void *app_data; +}; + +typedef int (ssh_packet_hook_fn)(struct ssh *, struct sshbuf *, + u_char *, void *); + +struct ssh *ssh_alloc_session_state(void); +struct ssh *ssh_packet_set_connection(struct ssh *, int, int); +void ssh_packet_set_timeout(struct ssh *, int, int); +int ssh_packet_stop_discard(struct ssh *); +int ssh_packet_connection_af(struct ssh *); +void ssh_packet_set_nonblocking(struct ssh *); +int ssh_packet_get_connection_in(struct ssh *); +int ssh_packet_get_connection_out(struct ssh *); +void ssh_packet_close(struct ssh *); +void ssh_packet_set_input_hook(struct ssh *, ssh_packet_hook_fn *, void *); +void ssh_packet_clear_keys(struct ssh *); +void ssh_clear_newkeys(struct ssh *, int); + +int ssh_packet_is_rekeying(struct ssh *); +int ssh_packet_check_rekey(struct ssh *); +void ssh_packet_set_protocol_flags(struct ssh *, u_int); +u_int ssh_packet_get_protocol_flags(struct ssh *); +void ssh_packet_set_tos(struct ssh *, int); +void ssh_packet_set_interactive(struct ssh *, int, int, int); +int ssh_packet_is_interactive(struct ssh *); +void ssh_packet_set_server(struct ssh *); +void ssh_packet_set_authenticated(struct ssh *); +void ssh_packet_set_mux(struct ssh *); +int ssh_packet_get_mux(struct ssh *); +int ssh_packet_set_log_preamble(struct ssh *, const char *, ...) + __attribute__((format(printf, 2, 3))); + +int ssh_packet_log_type(u_char); + +int ssh_packet_send2_wrapped(struct ssh *); +int ssh_packet_send2(struct ssh *); + +int ssh_packet_read(struct ssh *); +int ssh_packet_read_expect(struct ssh *, u_int type); +int ssh_packet_read_poll(struct ssh *); +int ssh_packet_read_poll2(struct ssh *, u_char *, u_int32_t *seqnr_p); +int ssh_packet_process_incoming(struct ssh *, const char *buf, u_int len); +int ssh_packet_process_read(struct ssh *, int); +int ssh_packet_read_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); +int ssh_packet_read_poll_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); + +const void *ssh_packet_get_string_ptr(struct ssh *, u_int *length_ptr); +void ssh_packet_disconnect(struct ssh *, const char *fmt, ...) + __attribute__((format(printf, 2, 3))) + __attribute__((noreturn)); +void ssh_packet_send_debug(struct ssh *, const char *fmt, ...) __attribute__((format(printf, 2, 3))); + +int ssh_set_newkeys(struct ssh *, int mode); +void ssh_packet_get_bytes(struct ssh *, u_int64_t *, u_int64_t *); + +int ssh_packet_write_poll(struct ssh *); +int ssh_packet_write_wait(struct ssh *); +int ssh_packet_have_data_to_write(struct ssh *); +int ssh_packet_not_very_much_data_to_write(struct ssh *); + +int ssh_packet_connection_is_on_socket(struct ssh *); +int ssh_packet_remaining(struct ssh *); + +void ssh_tty_make_modes(struct ssh *, int, struct termios *); +void ssh_tty_parse_modes(struct ssh *, int); + +void ssh_packet_set_alive_timeouts(struct ssh *, int); +int ssh_packet_inc_alive_timeouts(struct ssh *); +int ssh_packet_set_maxsize(struct ssh *, u_int); +u_int ssh_packet_get_maxsize(struct ssh *); + +int ssh_packet_get_state(struct ssh *, struct sshbuf *); +int ssh_packet_set_state(struct ssh *, struct sshbuf *); + +const char *ssh_remote_ipaddr(struct ssh *); +int ssh_remote_port(struct ssh *); +const char *ssh_local_ipaddr(struct ssh *); +int ssh_local_port(struct ssh *); +const char *ssh_packet_rdomain_in(struct ssh *); + +void ssh_packet_set_rekey_limits(struct ssh *, u_int64_t, u_int32_t); +time_t ssh_packet_get_rekey_timeout(struct ssh *); + +void *ssh_packet_get_input(struct ssh *); +void *ssh_packet_get_output(struct ssh *); + +/* new API */ +int sshpkt_start(struct ssh *ssh, u_char type); +int sshpkt_send(struct ssh *ssh); +int sshpkt_disconnect(struct ssh *, const char *fmt, ...) + __attribute__((format(printf, 2, 3))); +int sshpkt_add_padding(struct ssh *, u_char); +void sshpkt_fatal(struct ssh *ssh, int r, const char *fmt, ...) + __attribute__((format(printf, 3, 4))) + __attribute__((noreturn)); +int sshpkt_msg_ignore(struct ssh *, u_int); + +int sshpkt_put(struct ssh *ssh, const void *v, size_t len); +int sshpkt_putb(struct ssh *ssh, const struct sshbuf *b); +int sshpkt_put_u8(struct ssh *ssh, u_char val); +int sshpkt_put_u32(struct ssh *ssh, u_int32_t val); +int sshpkt_put_u64(struct ssh *ssh, u_int64_t val); +int sshpkt_put_string(struct ssh *ssh, const void *v, size_t len); +int sshpkt_put_cstring(struct ssh *ssh, const void *v); +int sshpkt_put_stringb(struct ssh *ssh, const struct sshbuf *v); +int sshpkt_put_ec(struct ssh *ssh, const EC_POINT *v, const EC_GROUP *g); +int sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v); + +int sshpkt_get(struct ssh *ssh, void *valp, size_t len); +int sshpkt_get_u8(struct ssh *ssh, u_char *valp); +int sshpkt_get_u32(struct ssh *ssh, u_int32_t *valp); +int sshpkt_get_u64(struct ssh *ssh, u_int64_t *valp); +int sshpkt_get_string(struct ssh *ssh, u_char **valp, size_t *lenp); +int sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp); +int sshpkt_peek_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp); +int sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp); +int sshpkt_getb_froms(struct ssh *ssh, struct sshbuf **valp); +int sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g); +int sshpkt_get_bignum2(struct ssh *ssh, BIGNUM **valp); +int sshpkt_get_end(struct ssh *ssh); +void sshpkt_fmt_connection_id(struct ssh *ssh, char *s, size_t l); +const u_char *sshpkt_ptr(struct ssh *, size_t *lenp); + +#if !defined(WITH_OPENSSL) +# undef BIGNUM +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#elif !defined(OPENSSL_HAS_ECC) +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#endif + +#endif /* PACKET_H */ |