Mercurial > dropbear
view scpmisc.h @ 1861:2b3a8026a6ce
Add re-exec for server
This allows ASLR to re-randomize the address
space for every connection, preventing some
vulnerabilities from being exploitable by
repeated probing.
Overhead (memory and time) is yet to be confirmed.
At present this is only enabled on Linux. Other BSD platforms
with fexecve() would probably also work though have not been tested.
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Sun, 30 Jan 2022 10:14:56 +0800 |
parents | 292f79307600 |
children |
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/* $OpenBSD: misc.h,v 1.12 2002/03/19 10:49:35 markus Exp $ */ /* * Author: Tatu Ylonen <[email protected]> * Copyright (c) 1995 Tatu Ylonen <[email protected]>, 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". */ char *chop(char *); char *strdelim(char **); void set_nonblock(int); void unset_nonblock(int); void set_nodelay(int); int a2port(const char *); char *cleanhostname(char *); char *colon(char *); long convtime(const char *); struct passwd *pwcopy(struct passwd *); typedef struct arglist arglist; struct arglist { char **list; u_int num; u_int nalloc; }; void addargs(arglist *, char *, ...); void replacearg(arglist *, u_int, char *, ...); void freeargs(arglist *); /* from xmalloc.h */ void *xmalloc(size_t); void *xrealloc(void *, size_t); void xfree(void *); char *xstrdup(const char *); char *ssh_get_progname(char *); void fatal(char* fmt,...); void sanitise_stdfd(void); /* Required for non-BSD platforms, from OpenSSH's defines.h */ #ifndef timersub #define timersub(a, b, result) \ do { \ (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ if ((result)->tv_usec < 0) { \ --(result)->tv_sec; \ (result)->tv_usec += 1000000; \ } \ } while (0) #endif #ifndef TIMEVAL_TO_TIMESPEC #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ (ts)->tv_sec = (tv)->tv_sec; \ (ts)->tv_nsec = (tv)->tv_usec * 1000; \ } #endif