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+/* $OpenBSD: misc.h,v 1.87 2020/05/29 11:17:56 dtucker 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>
+
+/* 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 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 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 **);
+long convtime(const char *);
+const char *fmt_timeframe(time_t t);
+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_timeval(struct timeval *, 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 *);
+
+void sock_set_v6only(int);
+
+struct passwd *pwcopy(struct passwd *);
+const char *ssh_gai_strerror(int);
+
+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);
+
+int argv_split(const char *, int *, char ***);
+char *argv_assemble(int, char **argv);
+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);
+
+/* 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 *);
+
+#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 */