/* * Copyright (c) 1997, 1998, 1999, 2000, 2001, 2002, 2003 * Inferno Nettverk A/S, Norway. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. The above copyright notice, this list of conditions and the following * disclaimer must appear in all copies of the software, derivative works * or modified versions, and any portions thereof, aswell as in all * supporting documentation. * 2. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by * Inferno Nettverk A/S, Norway. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Inferno Nettverk A/S requests users of this software to return to * * Software Distribution Coordinator or sdc@inet.no * Inferno Nettverk A/S * Oslo Research Park * Gaustadalléen 21 * NO-0349 Oslo * Norway * * any improvements or extensions that they make and grant Inferno Nettverk A/S * the rights to redistribute these changes. * */ /* $Id: interposition.h,v 1.38 2004/06/20 12:20:44 karls Exp $ */ #ifndef LIBRARY_PATH #define LIBRARY_PATH "" #endif #if HAVE_NO_SYMBOL_UNDERSCORE #define SYMBOL_ACCEPT "accept" #define SYMBOL_BIND "bind" #define SYMBOL_BINDRESVPORT "bindresvport" #define SYMBOL_CONNECT "connect" #define SYMBOL_GETHOSTBYADDR "gethostbyaddr" #define SYMBOL_GETHOSTBYNAME "gethostbyname" #define SYMBOL_GETHOSTBYNAME2 "gethostbyname2" #define SYMBOL_GETADDRINFO "getaddrinfo" #define SYMBOL_GETIPNODEBYNAME "getipnodebyname" #define SYMBOL_FREEHOSTENT "freehostent" #define SYMBOL_GETPEERNAME "getpeername" #define SYMBOL_GETSOCKNAME "getsockname" #define SYMBOL_READ "read" #define SYMBOL_READV "readv" #define SYMBOL_RECV "recv" #define SYMBOL_RECVFROM "recvfrom" #define SYMBOL_RECVMSG "recvmsg" #define SYMBOL_RRESVPORT "rresvport" #define SYMBOL_SEND "send" #define SYMBOL_SENDMSG "sendmsg" #define SYMBOL_SENDTO "sendto" #define SYMBOL_WRITE "write" #define SYMBOL_WRITEV "writev" #endif /* HAVE_NO_SYMBOL_UNDERSCORE */ /* XXX */ #ifndef LIBRARY_LIBC #define LIBRARY_LIBC __CONCAT(LIBRARY_PATH, "libc.so") #endif #ifndef SYMBOL_ACCEPT #define SYMBOL_ACCEPT "_accept" #endif #ifndef LIBRARY_ACCEPT #define LIBRARY_ACCEPT LIBRARY_LIBC #endif #ifndef SYMBOL_BIND #define SYMBOL_BIND "_bind" #endif #ifndef LIBRARY_BIND #define LIBRARY_BIND LIBRARY_LIBC #endif #ifndef SYMBOL_BINDRESVPORT #define SYMBOL_BINDRESVPORT "_bindresvport" #endif #ifndef LIBRARY_BINDRESVPORT #define LIBRARY_BINDRESVPORT LIBRARY_LIBC #endif #ifndef SYMBOL_CONNECT #define SYMBOL_CONNECT "_connect" #endif #ifndef LIBRARY_CONNECT #define LIBRARY_CONNECT LIBRARY_LIBC #endif #ifndef SYMBOL_GETHOSTBYADDR #define SYMBOL_GETHOSTBYADDR "_gethostbyaddr" #endif #ifndef LIBRARY_GETHOSTBYADDR #define LIBRARY_GETHOSTBYADDR LIBRARY_LIBC #endif #ifndef SYMBOL_GETHOSTBYNAME #define SYMBOL_GETHOSTBYNAME "_gethostbyname" #endif #ifndef LIBRARY_GETHOSTBYNAME #define LIBRARY_GETHOSTBYNAME LIBRARY_LIBC #endif #ifndef SYMBOL_GETHOSTBYNAME2 #define SYMBOL_GETHOSTBYNAME2 "_gethostbyname2" #endif #ifndef LIBRARY_GETHOSTBYNAME2 #define LIBRARY_GETHOSTBYNAME2 LIBRARY_LIBC #endif #ifndef SYMBOL_GETADDRINFO #define SYMBOL_GETADDRINFO "_getaddrinfo" #endif #ifndef LIBRARY_GETADDRINFO #define LIBRARY_GETADDRINFO LIBRARY_LIBC #endif #ifndef SYMBOL_GETIPNODEBYNAME #define SYMBOL_GETIPNODEBYNAME "_getipnodebyname" #endif #ifndef LIBRARY_GETIPNODEBYNAME #define LIBRARY_GETIPNODEBYNAME LIBRARY_LIBC #endif #ifndef SYMBOL_FREEHOSTENT #define SYMBOL_FREEHOSTENT "_freehostent" #endif #ifndef LIBRARY_FREEHOSTENT #define LIBRARY_FREEHOSTENT LIBRARY_LIBC #endif #ifndef SYMBOL_GETPEERNAME #define SYMBOL_GETPEERNAME "_getpeername" #endif #ifndef LIBRARY_GETPEERNAME #define LIBRARY_GETPEERNAME LIBRARY_LIBC #endif #ifndef SYMBOL_GETSOCKNAME #define SYMBOL_GETSOCKNAME "_getsockname" #endif #ifndef LIBRARY_GETSOCKNAME #define LIBRARY_GETSOCKNAME LIBRARY_LIBC #endif #ifndef SYMBOL_READ #define SYMBOL_READ "_read" #endif #ifndef LIBRARY_READ #define LIBRARY_READ LIBRARY_LIBC #endif #ifndef SYMBOL_READV #define SYMBOL_READV "_readv" #endif #ifndef LIBRARY_READV #define LIBRARY_READV LIBRARY_LIBC #endif #ifndef SYMBOL_RECV #define SYMBOL_RECV "_recv" #endif #ifndef LIBRARY_RECV #define LIBRARY_RECV LIBRARY_LIBC #endif #ifndef SYMBOL_RECVFROM #define SYMBOL_RECVFROM "_recvfrom" #endif #ifndef LIBRARY_RECVFROM #define LIBRARY_RECVFROM LIBRARY_LIBC #endif #ifndef SYMBOL_RECVMSG #define SYMBOL_RECVMSG "_recvmsg" #endif #ifndef LIBRARY_RECVMSG #define LIBRARY_RECVMSG LIBRARY_LIBC #endif #ifndef SYMBOL_RRESVPORT #define SYMBOL_RRESVPORT "_rresvport" #endif #ifndef LIBRARY_RRESVPORT #define LIBRARY_RRESVPORT LIBRARY_LIBC #endif #ifndef SYMBOL_SEND #define SYMBOL_SEND "_send" #endif #ifndef LIBRARY_SEND #define LIBRARY_SEND LIBRARY_LIBC #endif #ifndef SYMBOL_SENDMSG #define SYMBOL_SENDMSG "_sendmsg" #endif #ifndef LIBRARY_SENDMSG #define LIBRARY_SENDMSG LIBRARY_LIBC #endif #ifndef SYMBOL_SENDTO #define SYMBOL_SENDTO "_sendto" #endif #ifndef LIBRARY_SENDTO #define LIBRARY_SENDTO LIBRARY_LIBC #endif #ifndef SYMBOL_WRITE #define SYMBOL_WRITE "_write" #endif #ifndef LIBRARY_WRITE #define LIBRARY_WRITE LIBRARY_LIBC #endif #ifndef SYMBOL_WRITEV #define SYMBOL_WRITEV "_writev" #endif #ifndef LIBRARY_WRITEV #define LIBRARY_WRITEV LIBRARY_LIBC #endif /* only used on OSF */ #if HAVE_EXTRA_OSF_SYMBOLS #ifndef SYMBOL_EACCEPT #define SYMBOL_EACCEPT "_Eaccept" #endif #ifndef LIBRARY_EACCEPT #define LIBRARY_EACCEPT LIBRARY_LIBC #endif #ifndef SYMBOL_EGETPEERNAME #define SYMBOL_EGETPEERNAME "_Egetpeername" #endif #ifndef LIBRARY_EGETPEERNAME #define LIBRARY_EGETPEERNAME LIBRARY_LIBC #endif #ifndef SYMBOL_EGETSOCKNAME #define SYMBOL_EGETSOCKNAME "_Egetsockname" #endif #ifndef LIBRARY_EGETSOCKNAME #define LIBRARY_EGETSOCKNAME LIBRARY_LIBC #endif #ifndef SYMBOL_EREADV #define SYMBOL_EREADV "_Ereadv" #endif #ifndef LIBRARY_EREADV #define LIBRARY_EREADV LIBRARY_LIBC #endif #ifndef SYMBOL_ERECVFROM #define SYMBOL_ERECVFROM "_Erecvfrom" #endif #ifndef LIBRARY_ERECVFROM #define LIBRARY_ERECVFROM LIBRARY_LIBC #endif #ifndef SYMBOL_ERECVMSG #define SYMBOL_ERECVMSG "_Erecvmsg" #endif #ifndef LIBRARY_ERECVMSG #define LIBRARY_ERECVMSG LIBRARY_LIBC #endif #ifndef SYMBOL_ESENDMSG #define SYMBOL_ESENDMSG "_Esendmsg" #endif #ifndef LIBRARY_ESENDMSG #define LIBRARY_ESENDMSG LIBRARY_LIBC #endif #ifndef SYMBOL_EWRITEV #define SYMBOL_EWRITEV "_Ewritev" #endif #ifndef LIBRARY_EWRITEV #define LIBRARY_EWRITEV LIBRARY_LIBC #endif /* more OSF functions */ #ifndef SYMBOL_NACCEPT #define SYMBOL_NACCEPT "naccept" #endif #ifndef LIBRARY_NACCEPT #define LIBRARY_NACCEPT LIBRARY_LIBC #endif #ifndef SYMBOL_NGETPEERNAME #define SYMBOL_NGETPEERNAME "ngetpeername" #endif #ifndef LIBRARY_NGETPEERNAME #define LIBRARY_NGETPEERNAME LIBRARY_LIBC #endif #ifndef SYMBOL_NGETSOCKNAME #define SYMBOL_NGETSOCKNAME "ngetsockname" #endif #ifndef LIBRARY_NGETSOCKNAME #define LIBRARY_NGETSOCKNAME LIBRARY_LIBC #endif #ifndef SYMBOL_NRECVFROM #define SYMBOL_NRECVFROM "nrecvfrom" #endif #ifndef LIBRARY_NRECVFROM #define LIBRARY_NRECVFROM LIBRARY_LIBC #endif #ifndef SYMBOL_NRECVMSG #define SYMBOL_NRECVMSG "nrecvmsg" #endif #ifndef LIBRARY_NRECVMSG #define LIBRARY_NRECVMSG LIBRARY_LIBC #endif #ifndef SYMBOL_NSENDMSG #define SYMBOL_NSENDMSG "nsendmsg" #endif #ifndef LIBRARY_NSENDMSG #define LIBRARY_NSENDMSG LIBRARY_LIBC #endif #endif /* HAVE_EXTRA_OSF_SYMBOLS */ #ifdef lint extern const int lintnoloop_interposition_h; #else #define lintnoloop_interposition_h 0 #endif struct libsymbol_t { char *symbol; /* name of the symbol. */ char *library; /* library symbol is in. */ void *handle; /* handle to the library. */ void *function; /* the bound symbol. */ }; #if SOCKS_CLIENT #if DIAGNOSTIC && 0 #define SIGBLOCK() \ sigset_t oldmask; \ do { \ sigset_t newmask; \ \ sigemptyset(&newmask); \ sigaddset(&newmask, SIGALRM); \ if (sigprocmask(SIG_BLOCK, &newmask, &oldmask) != 0) \ swarn("SYSCALL_START(): sigprocmask()"); \ } while (0) #else /* */ #define SIGBLOCK() do { } while (lintnoloop_interposition_h) #endif \ #if DIAGNOSTIC && 0 #define SIGUNBLOCK() \ do { \ if (socksfd->state.system == 0) \ cc_socksfdv(-1); \ \ if (sigprocmask(SIG_SETMASK, &oldmask, NULL) != 0) \ swarn("SYSCALL_END(): sigprocmask()"); \ } while (lintnoloop_interposition_h) #else #define SIGUNBLOCK() do { } while (lintnoloop_interposition_h) #endif #define SYSCALL_START(s) \ int socksfd_added = 0; \ SIGBLOCK(); \ do { \ struct socksfd_t socksfdmem, *socksfd; \ \ if ((socksfd = socks_getaddr((unsigned int)s)) == NULL) { \ bzero(&socksfdmem, sizeof(socksfdmem)); \ socksfdmem.state.command = -1; \ socksfd = socks_addaddr((unsigned int)s, &socksfdmem); \ socksfd_added = 1; \ } \ \ SASSERTX(socksfd->state.system >= 0); \ ++socksfd->state.system; \ } while (lintnoloop_interposition_h) #define SYSCALL_END(s) \ do { \ struct socksfd_t *socksfd = socks_getaddr((unsigned int)s); \ \ SASSERTX(socksfd != NULL); \ \ SASSERTX(socksfd->state.system > 0); \ --socksfd->state.system; \ SIGUNBLOCK(); \ \ if (socksfd_added) { \ SASSERTX(socksfd->state.system == 0); \ socks_rmaddr((unsigned int)s); \ } \ } while (lintnoloop_interposition_h) #define ISSYSCALL(s) \ (socks_getaddr((unsigned int)(s)) != NULL \ && socks_getaddr((unsigned int)(s))->state.system) #endif /* SOCKS_CLIENT */ __BEGIN_DECLS void * symbolfunction __P((const char *symbol)); /* * Returns the address binding of the symbol "symbol" and updates * libsymbol_t structure "symbol" is defined in if necessary. * Exits on failure. */ void symbolcheck __P((void)); /* * Checks that all defined symbols are loadable (and loads them). * Note that this might open filedescriptors (and keep them open). */ __END_DECLS