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Diffstat (limited to '')
| -rw-r--r-- | misc.h | 243 |
1 files changed, 243 insertions, 0 deletions
@@ -0,0 +1,243 @@ +/* $OpenBSD: misc.h,v 1.101 2023/01/06 02:37:04 djm Exp $ */ + +/* + * Author: Tatu Ylonen <ylo@cs.hut.fi> + * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland + * All rights reserved + * + * 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 _MISC_H +#define _MISC_H + +#include <sys/time.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <stdio.h> + +/* Data structure for representing a forwarding request. */ +struct Forward { + char *listen_host; /* Host (address) to listen on. */ + int listen_port; /* Port to forward. */ + char *listen_path; /* Path to bind domain socket. */ + char *connect_host; /* Host to connect. */ + int connect_port; /* Port to connect on connect_host. */ + char *connect_path; /* Path to connect domain socket. */ + int allocated_port; /* Dynamically allocated listen port */ + int handle; /* Handle for dynamic listen ports */ +}; + +int forward_equals(const struct Forward *, const struct Forward *); +int daemonized(void); + +/* Common server and client forwarding options. */ +struct ForwardOptions { + int gateway_ports; /* Allow remote connects to forwarded ports. */ + mode_t streamlocal_bind_mask; /* umask for streamlocal binds */ + int streamlocal_bind_unlink; /* unlink socket before bind */ +}; + +/* misc.c */ + +char *chop(char *); +void rtrim(char *); +void skip_space(char **); +char *strdelim(char **); +char *strdelimw(char **); +int set_nonblock(int); +int unset_nonblock(int); +void set_nodelay(int); +int set_reuseaddr(int); +char *get_rdomain(int); +int set_rdomain(int, const char *); +int get_sock_af(int); +void set_sock_tos(int, int); +int waitrfd(int, int *); +int timeout_connect(int, const struct sockaddr *, socklen_t, int *); +int a2port(const char *); +int a2tun(const char *, int *); +char *put_host_port(const char *, u_short); +char *hpdelim2(char **, char *); +char *hpdelim(char **); +char *cleanhostname(char *); +char *colon(char *); +int parse_user_host_path(const char *, char **, char **, char **); +int parse_user_host_port(const char *, char **, char **, int *); +int parse_uri(const char *, const char *, char **, char **, int *, char **); +int convtime(const char *); +const char *fmt_timeframe(time_t t); +int tilde_expand(const char *, uid_t, char **); +char *tilde_expand_filename(const char *, uid_t); + +char *dollar_expand(int *, const char *string, ...); +char *percent_expand(const char *, ...) __attribute__((__sentinel__)); +char *percent_dollar_expand(const char *, ...) __attribute__((__sentinel__)); +char *tohex(const void *, size_t); +void xextendf(char **s, const char *sep, const char *fmt, ...) + __attribute__((__format__ (printf, 3, 4))) __attribute__((__nonnull__ (3))); +void sanitise_stdfd(void); +void ms_subtract_diff(struct timeval *, int *); +void ms_to_timespec(struct timespec *, int); +void monotime_ts(struct timespec *); +void monotime_tv(struct timeval *); +time_t monotime(void); +double monotime_double(void); +void lowercase(char *s); +int unix_listener(const char *, int, int); +int valid_domain(char *, int, const char **); +int valid_env_name(const char *); +const char *atoi_err(const char *, int *); +int parse_absolute_time(const char *, uint64_t *); +void format_absolute_time(uint64_t, char *, size_t); +int path_absolute(const char *); +int stdfd_devnull(int, int, int); + +void sock_set_v6only(int); + +struct passwd *pwcopy(struct passwd *); +const char *ssh_gai_strerror(int); + +typedef void privdrop_fn(struct passwd *); +typedef void privrestore_fn(void); +#define SSH_SUBPROCESS_STDOUT_DISCARD (1) /* Discard stdout */ +#define SSH_SUBPROCESS_STDOUT_CAPTURE (1<<1) /* Redirect stdout */ +#define SSH_SUBPROCESS_STDERR_DISCARD (1<<2) /* Discard stderr */ +#define SSH_SUBPROCESS_UNSAFE_PATH (1<<3) /* Don't check for safe cmd */ +#define SSH_SUBPROCESS_PRESERVE_ENV (1<<4) /* Keep parent environment */ +pid_t subprocess(const char *, const char *, int, char **, FILE **, u_int, + struct passwd *, privdrop_fn *, privrestore_fn *); + +typedef struct arglist arglist; +struct arglist { + char **list; + u_int num; + u_int nalloc; +}; +void addargs(arglist *, char *, ...) + __attribute__((format(printf, 2, 3))); +void replacearg(arglist *, u_int, char *, ...) + __attribute__((format(printf, 3, 4))); +void freeargs(arglist *); + +int tun_open(int, int, char **); + +/* Common definitions for ssh tunnel device forwarding */ +#define SSH_TUNMODE_NO 0x00 +#define SSH_TUNMODE_POINTOPOINT 0x01 +#define SSH_TUNMODE_ETHERNET 0x02 +#define SSH_TUNMODE_DEFAULT SSH_TUNMODE_POINTOPOINT +#define SSH_TUNMODE_YES (SSH_TUNMODE_POINTOPOINT|SSH_TUNMODE_ETHERNET) + +#define SSH_TUNID_ANY 0x7fffffff +#define SSH_TUNID_ERR (SSH_TUNID_ANY - 1) +#define SSH_TUNID_MAX (SSH_TUNID_ANY - 2) + +/* Fake port to indicate that host field is really a path. */ +#define PORT_STREAMLOCAL -2 + +/* Functions to extract or store big-endian words of various sizes */ +u_int64_t get_u64(const void *) + __attribute__((__bounded__( __minbytes__, 1, 8))); +u_int32_t get_u32(const void *) + __attribute__((__bounded__( __minbytes__, 1, 4))); +u_int16_t get_u16(const void *) + __attribute__((__bounded__( __minbytes__, 1, 2))); +void put_u64(void *, u_int64_t) + __attribute__((__bounded__( __minbytes__, 1, 8))); +void put_u32(void *, u_int32_t) + __attribute__((__bounded__( __minbytes__, 1, 4))); +void put_u16(void *, u_int16_t) + __attribute__((__bounded__( __minbytes__, 1, 2))); + +/* Little-endian store/load, used by umac.c */ +u_int32_t get_u32_le(const void *) + __attribute__((__bounded__(__minbytes__, 1, 4))); +void put_u32_le(void *, u_int32_t) + __attribute__((__bounded__(__minbytes__, 1, 4))); + +struct bwlimit { + size_t buflen; + u_int64_t rate; /* desired rate in kbit/s */ + u_int64_t thresh; /* threshold after which we'll check timers */ + u_int64_t lamt; /* amount written in last timer interval */ + struct timeval bwstart, bwend; +}; + +void bandwidth_limit_init(struct bwlimit *, u_int64_t, size_t); +void bandwidth_limit(struct bwlimit *, size_t); + +int parse_ipqos(const char *); +const char *iptos2str(int); +void mktemp_proto(char *, size_t); + +void child_set_env(char ***envp, u_int *envsizep, const char *name, + const char *value); +const char *lookup_env_in_list(const char *env, + char * const *envs, size_t nenvs); +const char *lookup_setenv_in_list(const char *env, + char * const *envs, size_t nenvs); + +int argv_split(const char *, int *, char ***, int); +char *argv_assemble(int, char **argv); +char *argv_next(int *, char ***); +void argv_consume(int *); +void argv_free(char **, int); + +int exited_cleanly(pid_t, const char *, const char *, int); + +struct stat; +int safe_path(const char *, struct stat *, const char *, uid_t, + char *, size_t); +int safe_path_fd(int, const char *, struct passwd *, + char *err, size_t errlen); + +/* authorized_key-style options parsing helpers */ +int opt_flag(const char *opt, int allow_negate, const char **optsp); +char *opt_dequote(const char **sp, const char **errstrp); +int opt_match(const char **opts, const char *term); + +/* readconf/servconf option lists */ +void opt_array_append(const char *file, const int line, + const char *directive, char ***array, u_int *lp, const char *s); +void opt_array_append2(const char *file, const int line, + const char *directive, char ***array, int **iarray, u_int *lp, + const char *s, int i); + +struct timespec; +void ptimeout_init(struct timespec *pt); +void ptimeout_deadline_sec(struct timespec *pt, long sec); +void ptimeout_deadline_ms(struct timespec *pt, long ms); +void ptimeout_deadline_monotime(struct timespec *pt, time_t when); +int ptimeout_get_ms(struct timespec *pt); +struct timespec *ptimeout_get_tsp(struct timespec *pt); +int ptimeout_isset(struct timespec *pt); + +/* readpass.c */ + +#define RP_ECHO 0x0001 +#define RP_ALLOW_STDIN 0x0002 +#define RP_ALLOW_EOF 0x0004 +#define RP_USE_ASKPASS 0x0008 + +struct notifier_ctx; + +char *read_passphrase(const char *, int); +int ask_permission(const char *, ...) __attribute__((format(printf, 1, 2))); +struct notifier_ctx *notify_start(int, const char *, ...) + __attribute__((format(printf, 2, 3))); +void notify_complete(struct notifier_ctx *, const char *, ...) + __attribute__((format(printf, 2, 3))); + +#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) +#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b)) +#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y)) + +typedef void (*sshsig_t)(int); +sshsig_t ssh_signal(int, sshsig_t); + +#endif /* _MISC_H */ |