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misc.h
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misc.h
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/* $OpenBSD: misc.h,v 1.99 2021/11/13 21:14:13 deraadt 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);
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);
/* 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 */