1 /* $OpenBSD: misc.h,v 1.70 2018/01/08 15:21:49 markus 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 * 8 * As far as I am concerned, the code I have written for this software 9 * can be used freely for any purpose. Any derived versions of this 10 * software must be clearly marked as such, and if the derived work is 11 * incompatible with the protocol description in the RFC file, it must be 12 * called by a name other than "ssh" or "Secure Shell". 13 */ 14 15 #ifndef _MISC_H 16 #define _MISC_H 17 18 #include <sys/time.h> 19 #include <sys/types.h> 20 21 /* Data structure for representing a forwarding request. */ 22 struct Forward { 23 char *listen_host; /* Host (address) to listen on. */ 24 int listen_port; /* Port to forward. */ 25 char *listen_path; /* Path to bind domain socket. */ 26 char *connect_host; /* Host to connect. */ 27 int connect_port; /* Port to connect on connect_host. */ 28 char *connect_path; /* Path to connect domain socket. */ 29 int allocated_port; /* Dynamically allocated listen port */ 30 int handle; /* Handle for dynamic listen ports */ 31 }; 32 33 int forward_equals(const struct Forward *, const struct Forward *); 34 int bind_permitted(int, uid_t); 35 int daemonized(void); 36 37 /* Common server and client forwarding options. */ 38 struct ForwardOptions { 39 int gateway_ports; /* Allow remote connects to forwarded ports. */ 40 mode_t streamlocal_bind_mask; /* umask for streamlocal binds */ 41 int streamlocal_bind_unlink; /* unlink socket before bind */ 42 }; 43 44 /* misc.c */ 45 46 char *chop(char *); 47 char *strdelim(char **); 48 int set_nonblock(int); 49 int unset_nonblock(int); 50 void set_nodelay(int); 51 int set_reuseaddr(int); 52 char *get_rdomain(int); 53 int set_rdomain(int, const char *); 54 int a2port(const char *); 55 int a2tun(const char *, int *); 56 char *put_host_port(const char *, u_short); 57 char *hpdelim(char **); 58 char *cleanhostname(char *); 59 char *colon(char *); 60 int parse_user_host_path(const char *, char **, char **, char **); 61 int parse_user_host_port(const char *, char **, char **, int *); 62 int parse_uri(const char *, const char *, char **, char **, int *, char **); 63 long convtime(const char *); 64 char *tilde_expand_filename(const char *, uid_t); 65 char *percent_expand(const char *, ...) __attribute__((__sentinel__)); 66 char *tohex(const void *, size_t); 67 void sanitise_stdfd(void); 68 void ms_subtract_diff(struct timeval *, int *); 69 void ms_to_timeval(struct timeval *, int); 70 void monotime_ts(struct timespec *); 71 void monotime_tv(struct timeval *); 72 time_t monotime(void); 73 double monotime_double(void); 74 void lowercase(char *s); 75 int unix_listener(const char *, int, int); 76 int valid_domain(char *, int, const char **); 77 const char *atoi_err(const char *, int *); 78 79 struct passwd *pwcopy(struct passwd *); 80 const char *ssh_gai_strerror(int); 81 82 typedef struct arglist arglist; 83 struct arglist { 84 char **list; 85 u_int num; 86 u_int nalloc; 87 }; 88 void addargs(arglist *, char *, ...) 89 __attribute__((format(printf, 2, 3))); 90 void replacearg(arglist *, u_int, char *, ...) 91 __attribute__((format(printf, 3, 4))); 92 void freeargs(arglist *); 93 94 int tun_open(int, int, char **); 95 96 /* Common definitions for ssh tunnel device forwarding */ 97 #define SSH_TUNMODE_NO 0x00 98 #define SSH_TUNMODE_POINTOPOINT 0x01 99 #define SSH_TUNMODE_ETHERNET 0x02 100 #define SSH_TUNMODE_DEFAULT SSH_TUNMODE_POINTOPOINT 101 #define SSH_TUNMODE_YES (SSH_TUNMODE_POINTOPOINT|SSH_TUNMODE_ETHERNET) 102 103 #define SSH_TUNID_ANY 0x7fffffff 104 #define SSH_TUNID_ERR (SSH_TUNID_ANY - 1) 105 #define SSH_TUNID_MAX (SSH_TUNID_ANY - 2) 106 107 /* Fake port to indicate that host field is really a path. */ 108 #define PORT_STREAMLOCAL -2 109 110 /* Functions to extract or store big-endian words of various sizes */ 111 u_int64_t get_u64(const void *) 112 __attribute__((__bounded__( __minbytes__, 1, 8))); 113 u_int32_t get_u32(const void *) 114 __attribute__((__bounded__( __minbytes__, 1, 4))); 115 u_int16_t get_u16(const void *) 116 __attribute__((__bounded__( __minbytes__, 1, 2))); 117 void put_u64(void *, u_int64_t) 118 __attribute__((__bounded__( __minbytes__, 1, 8))); 119 void put_u32(void *, u_int32_t) 120 __attribute__((__bounded__( __minbytes__, 1, 4))); 121 void put_u16(void *, u_int16_t) 122 __attribute__((__bounded__( __minbytes__, 1, 2))); 123 124 /* Little-endian store/load, used by umac.c */ 125 u_int32_t get_u32_le(const void *) 126 __attribute__((__bounded__(__minbytes__, 1, 4))); 127 void put_u32_le(void *, u_int32_t) 128 __attribute__((__bounded__(__minbytes__, 1, 4))); 129 130 struct bwlimit { 131 size_t buflen; 132 u_int64_t rate, thresh, lamt; 133 struct timeval bwstart, bwend; 134 }; 135 136 void bandwidth_limit_init(struct bwlimit *, u_int64_t, size_t); 137 void bandwidth_limit(struct bwlimit *, size_t); 138 139 int parse_ipqos(const char *); 140 const char *iptos2str(int); 141 void mktemp_proto(char *, size_t); 142 143 void child_set_env(char ***envp, u_int *envsizep, const char *name, 144 const char *value); 145 146 int argv_split(const char *, int *, char ***); 147 char *argv_assemble(int, char **argv); 148 int exited_cleanly(pid_t, const char *, const char *, int); 149 150 struct stat; 151 int safe_path(const char *, struct stat *, const char *, uid_t, 152 char *, size_t); 153 int safe_path_fd(int, const char *, struct passwd *, 154 char *err, size_t errlen); 155 156 /* readpass.c */ 157 158 #define RP_ECHO 0x0001 159 #define RP_ALLOW_STDIN 0x0002 160 #define RP_ALLOW_EOF 0x0004 161 #define RP_USE_ASKPASS 0x0008 162 163 char *read_passphrase(const char *, int); 164 int ask_permission(const char *, ...) __attribute__((format(printf, 1, 2))); 165 int read_keyfile_line(FILE *, const char *, char *, size_t, u_long *); 166 167 #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) 168 #define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b)) 169 #define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y)) 170 171 #endif /* _MISC_H */ 172