mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-24 15:16:40 +00:00
Added intercept build file and sources
This commit is contained in:
Joseph Henry
parent
769bad3320
commit
e3ec000e93
29
make-netcon.mk
Normal file
29
make-netcon.mk
Normal file
@ -0,0 +1,29 @@
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SHCC=gcc
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# intercept-specific
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intercept_CFLAGS = -c -fPIC -g -O2 -Wall -std=c99 -D_GNU_SOURCE -DNETCON_INTERCEPT
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LIB_NAME = intercept
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SHLIB_EXT=dylib
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SHLIB_MAJOR = 1
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SHLIB_MINOR = 8
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COMMON = common
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OBJS= netcon/intercept.o
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SHLIB = ${LIB_NAME}.${SHLIB_EXT}.${SHLIB_MAJOR}.${SHLIB_MINOR}
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SHLDFLAGS = -g -O2 -Wall -I. -nostdlib -shared
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LIBS = -ldl -lc -lrt -lpthread
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lib:
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${SHCC} $(intercept_CFLAGS) -I. netcon/intercept.c -o netcon/intercept.o
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${SHCC} $(intercept_CFLAGS) -I. netcon/common.c -o netcon/common.o
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${SHCC} $(intercept_CFLAGS) -I. netcon/sendfd.c -o netcon/sendfd.o
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${SHCC} $(SHLDFLAGS) netcon/intercept.o netcon/common.o netcon/sendfd.o -o netcon/libintercept.so.1.0 $(LIBS)
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install:
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cp netcon/libintercept.so.1.0 /lib/libintercept.so.1.0
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ln -sf /lib/libintercept.so.1.0 /lib/libintercept
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/usr/bin/install -c netcon/intercept /usr/bin
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uninstall:
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rm -r /lib/libintercept.so.1.0
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rm -r /lib/libintercept
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rm -r /usr/bin/intercept
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130
netcon/common.c
Executable file
130
netcon/common.c
Executable file
@ -0,0 +1,130 @@
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/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include <stdio.h>
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#include <netdb.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <pthread.h>
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#include "common.h"
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void dwr(const char *fmt, ...);
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/* defined in intercept and service */
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extern FILE* logfile;
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extern char* logfilename;
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//extern flog = -1;
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extern pthread_mutex_t loglock;
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#ifdef NETCON_SERVICE
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void dwr(int, const char *fmt, ...);
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void dwr(const char *fmt, ...)
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{
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int saveerr;
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va_list ap;
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va_start(ap, fmt);
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saveerr = errno;
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dwr(-1, fmt, ap);
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errno = saveerr;
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va_end(ap);
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}
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void dwr(int pid, const char *fmt, ...)
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#endif
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#ifdef NETCON_INTERCEPT
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void dwr(const char *fmt, ...)
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#endif
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{
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va_list ap;
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int saveerr;
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char timestring[20];
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time_t timestamp;
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timestamp = time(NULL);
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strftime(timestring, sizeof(timestring), "%H:%M:%S", localtime(×tamp));
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if(logfile)
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fprintf(logfile, "%s ", timestring);
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fprintf(stderr, "%s ", timestring);
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#ifdef NETCON_SERVICE
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if(ns != NULL)
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{
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size_t num_intercepts = ns->intercepts.size();
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size_t num_connections = ns->connections.size();
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if(logfile)
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fprintf(logfile, "[i/c/tid=%3lu|%3lu|%7d]", num_intercepts, num_connections, pid);
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fprintf(stderr, "[i/c/tid=%3lu|%3lu|%7d]", num_intercepts, num_connections, pid);
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}
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else {
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if(logfile)
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fprintf(logfile, "[i/c/tid=%3d|%3d|%7d]", 0, 0, -1);
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fprintf(stderr, "[i/c/tid=%3d|%3d|%7d]", 0, 0, -1);
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}
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#endif
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#ifdef NETCON_INTERCEPT
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//pthread_mutex_lock(&loglock);
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int pid = getpid();
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if(logfile)
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fprintf(logfile, "[tid=%7d]", pid);
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fprintf(stderr, "[tid=%7d]", pid);
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//pthread_mutex_unlock(&loglock);
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#endif
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if(logfile)
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fputs(" ", logfile);
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fputs(" ", stderr);
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/* logfile */
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va_start(ap, fmt);
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saveerr = errno;
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if(logfile){
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vfprintf(logfile, fmt, ap);
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fflush(logfile);
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}
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va_end(ap);
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/* console */
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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fflush(stderr);
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errno = saveerr;
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va_end(ap);
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}
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34
netcon/common.h
Executable file
34
netcon/common.h
Executable file
@ -0,0 +1,34 @@
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#ifndef _COMMON_H_
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#define _COMMON_H_
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//#include <unistd.h>
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#include <sys/ioctl.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <stdarg.h>
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#include <sys/stat.h>
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#include <sys/ipc.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <time.h>
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#include <assert.h>
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#include <signal.h>
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#include <sys/socket.h>
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void set_log_options(int, char *, int);
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void show_msg(int level, char *, ...);
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unsigned int resolve_ip(char *, int, int);
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#define MSGERR 0
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#define MSGDEBUG 1
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#endif
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60
netcon/defs.h
Normal file
60
netcon/defs.h
Normal file
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/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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/* Maximum number of socket connections allowed in service */
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#define MAX_SOCKETS 1024
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/* Maximum number of harnesses allowed to be connected to this service */
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#define MAX_INTERCEPTS 256
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#define SELECT_PERF_WARNING 1000
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#define CMD_SIZE 32
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#define DATA_IDX CMD_SIZE
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#define CMD_IDX 0
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#define BUF_SZ 1024
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/* number or times an intercept will attempt to connect to the service */
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#define SERVICE_CONNECT_ATTEMPTS 3
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/* how long we wait when polling various I/O sources in the core I/O loop */
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#define INTERCEPT_POLL_TIMEOUT 0
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/* how often we want lwIP to poll our callback.
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- We use this to resume pending data transfers */
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#define APPLICATION_POLL_FREQ 1
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/* for passing applications as arguments to the service */
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#define APP_ARGUMENT_LENGTH 128
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#define DEFAULT_RPC_PIPE_IDX 0
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/* display various types of detectable lwip/service/intercept problems */
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#define NETCON_WARNINGS 1
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typedef int rpc_len_type;
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54
netcon/intercept
Executable file
54
netcon/intercept
Executable file
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#!/bin/sh
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# usage:
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# /usr/bin/intercept program <args>
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if [ $# = 0 ] ; then
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echo "$0: insufficient arguments"
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exit
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fi
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case "$1" in
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on)
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if [ -z "$LD_PRELOAD" ]
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then
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export LD_PRELOAD="/lib/libintercept.so.1.0"
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else
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echo $LD_PRELOAD | grep -q "/lib/libintercept\.so.1.0" || \
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export LD_PRELOAD="/lib/libintercept.so $LD_PRELOAD"
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fi
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;;
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off)
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export LD_PRELOAD=`echo -n $LD_PRELOAD | sed 's/\/lib\/libintercept.so.1.0 \?//'`
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if [ -z "$LD_PRELOAD" ]
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then
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unset LD_PRELOAD
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fi
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;;
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show|sh)
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echo "LD_PRELOAD=\"$LD_PRELOAD\""
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;;
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-h|-?)
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echo ""
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;;
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*)
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if [ -z "$LD_PRELOAD" ]
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then
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export LD_PRELOAD="/lib/libintercept.so.1.0"
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else
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echo $LD_PRELOAD | grep -q "/lib/libintercept\.so.1.0" || \
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export LD_PRELOAD="/lib/libintercept.so.1.0 $LD_PRELOAD"
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|
fi
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if [ $# = 0 ]
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|
then
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${SHELL:-/bin/sh}
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|
fi
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if [ $# -gt 0 ]
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|
then
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exec "$@"
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|
fi
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;;
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esac
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#EOF
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@ -40,7 +40,6 @@ char *progname = "";
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#include <sys/time.h>
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#include <sys/time.h>
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#include <pwd.h>
|
#include <pwd.h>
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#include <errno.h>
|
#include <errno.h>
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#include <common.h>
|
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#include <stdarg.h>
|
#include <stdarg.h>
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#include <netdb.h>
|
#include <netdb.h>
|
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#include <string.h>
|
#include <string.h>
|
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@ -55,7 +54,7 @@ char *progname = "";
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#include <arpa/inet.h>
|
#include <arpa/inet.h>
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|
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#include <poll.h>
|
#include <poll.h>
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|
#include <pthread.h>
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#include <unistd.h>
|
#include <unistd.h>
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|
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/* For NPs */
|
/* For NPs */
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@ -69,13 +68,12 @@ char *progname = "";
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#ifdef USE_SOCKS_DNS
|
#ifdef USE_SOCKS_DNS
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#include <resolv.h>
|
#include <resolv.h>
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#endif
|
#endif
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#include <intercept.h>
|
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|
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|
#include "intercept.h"
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|
#include "common.h"
|
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#include "defs.h"
|
#include "defs.h"
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#include "utils.c"
|
#include "utils.c"
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|
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#include <pthread.h>
|
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|
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/* Global Declarations */
|
/* Global Declarations */
|
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#ifdef USE_SOCKS_DNS
|
#ifdef USE_SOCKS_DNS
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static int (*realresinit)(void);
|
static int (*realresinit)(void);
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233
netcon/intercept.h
Executable file
233
netcon/intercept.h
Executable file
@ -0,0 +1,233 @@
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|
/*
|
||||||
|
* ZeroTier One - Network Virtualization Everywhere
|
||||||
|
* Copyright (C) 2011-2015 ZeroTier, Inc.
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*
|
||||||
|
* --
|
||||||
|
*
|
||||||
|
* ZeroTier may be used and distributed under the terms of the GPLv3, which
|
||||||
|
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
|
||||||
|
*
|
||||||
|
* If you would like to embed ZeroTier into a commercial application or
|
||||||
|
* redistribute it in a modified binary form, please contact ZeroTier Networks
|
||||||
|
* LLC. Start here: http://www.zerotier.com/
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef _HARNESS_H
|
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|
#define _HARNESS_H 1
|
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|
|
||||||
|
#include <sys/socket.h>
|
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|
|
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|
|
||||||
|
/* Userland RPC codes */
|
||||||
|
#define RPC_UNDEFINED 0
|
||||||
|
#define RPC_CONNECT 1
|
||||||
|
#define RPC_CONNECT_SOCKARG 2
|
||||||
|
#define RPC_SELECT 3
|
||||||
|
#define RPC_POLL 4
|
||||||
|
#define RPC_CLOSE 5
|
||||||
|
#define RPC_READ 6
|
||||||
|
#define RPC_WRITE 7
|
||||||
|
#define RPC_BIND 8
|
||||||
|
#define RPC_ACCEPT 9
|
||||||
|
#define RPC_LISTEN 10
|
||||||
|
#define RPC_SOCKET 11
|
||||||
|
#define RPC_SHUTDOWN 12
|
||||||
|
|
||||||
|
/* Administration RPC codes */
|
||||||
|
#define RPC_FD_MAP_COMPLETION 20 // Give the service the value we "see" for the new buffer fd
|
||||||
|
#define RPC_RETVAL 21 // not RPC per se, but something we should codify
|
||||||
|
#define RPC_KILL_INTERCEPT 22 // Tells the service we need to shut down all connections
|
||||||
|
|
||||||
|
/* Connection statuses */
|
||||||
|
#define UNSTARTED 0
|
||||||
|
#define CONNECTING 1
|
||||||
|
#define CONNECTED 2
|
||||||
|
#define SENDING 3
|
||||||
|
#define RECEIVING 4
|
||||||
|
#define SENTV4REQ 5
|
||||||
|
#define GOTV4REQ 6
|
||||||
|
#define SENTV5METHOD 7
|
||||||
|
#define GOTV5METHOD 8
|
||||||
|
#define SENTV5AUTH 9
|
||||||
|
#define GOTV5AUTH 10
|
||||||
|
#define SENTV5CONNECT 11
|
||||||
|
#define GOTV5CONNECT 12
|
||||||
|
#define DONE 13
|
||||||
|
#define FAILED 14
|
||||||
|
|
||||||
|
/* Flags to indicate what events a
|
||||||
|
socket was select()ed for */
|
||||||
|
#define READ (POLLIN|POLLRDNORM)
|
||||||
|
#define WRITE (POLLOUT|POLLWRNORM|POLLWRBAND)
|
||||||
|
#define EXCEPT (POLLRDBAND|POLLPRI)
|
||||||
|
#define READWRITE (READ|WRITE)
|
||||||
|
#define READWRITEEXCEPT (READ|WRITE|EXCEPT)
|
||||||
|
|
||||||
|
|
||||||
|
/* for AF_UNIX sockets */
|
||||||
|
#define MAX_PATH_NAME_SIZE 64
|
||||||
|
|
||||||
|
// bind
|
||||||
|
#define BIND_SIG int sockfd, const struct sockaddr *addr, socklen_t addrlen
|
||||||
|
struct bind_st
|
||||||
|
{
|
||||||
|
int sockfd;
|
||||||
|
struct sockaddr addr;
|
||||||
|
socklen_t addrlen;
|
||||||
|
int __tid;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
// connect
|
||||||
|
#define CONNECT_SIG int __fd, const struct sockaddr * __addr, socklen_t __len
|
||||||
|
struct connect_st
|
||||||
|
{
|
||||||
|
int __fd;
|
||||||
|
struct sockaddr __addr;
|
||||||
|
socklen_t __len;
|
||||||
|
int __tid;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
// close
|
||||||
|
#define CLOSE_SIG int fd
|
||||||
|
struct close_st
|
||||||
|
{
|
||||||
|
int fd;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
// read
|
||||||
|
#define DEFAULT_READ_BUFFER_SIZE 1024 * 63
|
||||||
|
// read buffer sizes (on test machine) min: 4096 default: 87380 max:6147872
|
||||||
|
#define READ_SIG int __fd, void *__buf, size_t __nbytes
|
||||||
|
struct read_st
|
||||||
|
{
|
||||||
|
int fd;
|
||||||
|
size_t count;
|
||||||
|
unsigned char buf[DEFAULT_READ_BUFFER_SIZE];
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#define DEFAULT_WRITE_BUFFER_SIZE 1024 * 63
|
||||||
|
// write buffer sizes (on test machine) min: 4096 default: 16384 max:4194304
|
||||||
|
#define WRITE_SIG int __fd, const void *__buf, size_t __n
|
||||||
|
struct write_st
|
||||||
|
{
|
||||||
|
int fd;
|
||||||
|
size_t count;
|
||||||
|
char buf[DEFAULT_WRITE_BUFFER_SIZE];
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
#define LISTEN_SIG int sockfd, int backlog
|
||||||
|
struct listen_st
|
||||||
|
{
|
||||||
|
int sockfd;
|
||||||
|
int backlog;
|
||||||
|
int __tid;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#define SOCKET_SIG int socket_family, int socket_type, int protocol
|
||||||
|
struct socket_st
|
||||||
|
{
|
||||||
|
int socket_family;
|
||||||
|
int socket_type;
|
||||||
|
int protocol;
|
||||||
|
int __tid;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
#define ACCEPT4_SIG int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags
|
||||||
|
|
||||||
|
|
||||||
|
#define ACCEPT_SIG int sockfd, struct sockaddr *addr, socklen_t *addrlen
|
||||||
|
struct accept_st
|
||||||
|
{
|
||||||
|
int sockfd;
|
||||||
|
struct sockaddr addr;
|
||||||
|
socklen_t addrlen;
|
||||||
|
int __tid;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
#define SHUTDOWN_SIG int socket, int how
|
||||||
|
struct shutdown_st
|
||||||
|
{
|
||||||
|
int socket;
|
||||||
|
int how;
|
||||||
|
};
|
||||||
|
|
||||||
|
#define CONNECT_SOCKARG struct sockaddr *
|
||||||
|
#define SELECT_SIG int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout
|
||||||
|
#define POLL_SIG struct pollfd *__fds, nfds_t __nfds, int __timeout
|
||||||
|
#define IOCTL_SIG int __fd, unsigned long int __request, ...
|
||||||
|
#define FCNTL_SIG int __fd, int __cmd, ...
|
||||||
|
#define CLONE_SIG int (*fn) (void *arg), void *child_stack, int flags, void *arg
|
||||||
|
#define DAEMON_SIG int nochdir, int noclose
|
||||||
|
|
||||||
|
|
||||||
|
#define SETSOCKOPT_SIG int socket, int level, int option_name, const void *option_value, socklen_t option_len
|
||||||
|
#define GETSOCKOPT_SIG int sockfd, int level, int optname, void *optval, socklen_t *optlen
|
||||||
|
|
||||||
|
|
||||||
|
/* LWIP error beautification */
|
||||||
|
const char *lwiperror(int n)
|
||||||
|
{
|
||||||
|
switch(n)
|
||||||
|
{
|
||||||
|
case 0:
|
||||||
|
return "ERR_OK";
|
||||||
|
case -1:
|
||||||
|
return "ERR_MEM (out of memory)";
|
||||||
|
case -2:
|
||||||
|
return "ERR_BUF (buffer error)";
|
||||||
|
case -3:
|
||||||
|
return "ERR_TIMEOUT (timeout)";
|
||||||
|
case -4:
|
||||||
|
return "ERR_RTE (routing problem)";
|
||||||
|
case -5:
|
||||||
|
return "ERR_INPROGRESS (operation in progress)";
|
||||||
|
case -6:
|
||||||
|
return "ERR_VAL (illegal value)";
|
||||||
|
case -7:
|
||||||
|
return "ERR_WOULDBLOCK (operation would block)";
|
||||||
|
case -8:
|
||||||
|
return "ERR_USE (address in use)";
|
||||||
|
case -9:
|
||||||
|
return "ERR_ISCONN (already connected)";
|
||||||
|
case -10:
|
||||||
|
return "Fatal: ERR_ABRT (connection aborted)";
|
||||||
|
case -11:
|
||||||
|
return "Fatal: ERR_RST (connection reset)";
|
||||||
|
case -12:
|
||||||
|
return "Fatal: ERR_CLSD (connection closed)";
|
||||||
|
case -13:
|
||||||
|
return "Fatal: ERR_CONN (not connected)";
|
||||||
|
case -14:
|
||||||
|
return "Fatal: ERR_ARG (illegal argument)";
|
||||||
|
case -15:
|
||||||
|
return "Fatal: ERR_IF (low level netif error)";
|
||||||
|
default:
|
||||||
|
return "UNKNOWN_RET_VAL";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif
|
||||||
BIN
netcon/libintercept.so.1.0
Executable file
BIN
netcon/libintercept.so.1.0
Executable file
Binary file not shown.
107
netcon/sendfd.c
Normal file
107
netcon/sendfd.c
Normal file
@ -0,0 +1,107 @@
|
|||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
|
||||||
|
/* Functions used to pass file descriptors between processes */
|
||||||
|
|
||||||
|
ssize_t sock_fd_write(int sock, int fd);
|
||||||
|
ssize_t sock_fd_read(int sock, void *buf, ssize_t bufsize, int *fd);
|
||||||
|
|
||||||
|
ssize_t sock_fd_write(int sock, int fd)
|
||||||
|
{
|
||||||
|
ssize_t size;
|
||||||
|
struct msghdr msg;
|
||||||
|
struct iovec iov;
|
||||||
|
char buf = '\0';
|
||||||
|
int buflen = 1;
|
||||||
|
|
||||||
|
union
|
||||||
|
{
|
||||||
|
struct cmsghdr cmsghdr;
|
||||||
|
char control[CMSG_SPACE(sizeof (int))];
|
||||||
|
} cmsgu;
|
||||||
|
struct cmsghdr *cmsg;
|
||||||
|
|
||||||
|
iov.iov_base = &buf;
|
||||||
|
iov.iov_len = buflen;
|
||||||
|
|
||||||
|
msg.msg_name = NULL;
|
||||||
|
msg.msg_namelen = 0;
|
||||||
|
msg.msg_iov = &iov;
|
||||||
|
msg.msg_iovlen = 1;
|
||||||
|
|
||||||
|
if (fd != -1) {
|
||||||
|
msg.msg_control = cmsgu.control;
|
||||||
|
msg.msg_controllen = sizeof(cmsgu.control);
|
||||||
|
cmsg = CMSG_FIRSTHDR(&msg);
|
||||||
|
cmsg->cmsg_len = CMSG_LEN(sizeof (int));
|
||||||
|
cmsg->cmsg_level = SOL_SOCKET;
|
||||||
|
cmsg->cmsg_type = SCM_RIGHTS;
|
||||||
|
*((int *) CMSG_DATA(cmsg)) = fd;
|
||||||
|
} else {
|
||||||
|
msg.msg_control = NULL;
|
||||||
|
msg.msg_controllen = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
size = sendmsg(sock, &msg, 0);
|
||||||
|
if (size < 0)
|
||||||
|
perror ("sendmsg");
|
||||||
|
return size;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
ssize_t sock_fd_read(int sock, void *buf, ssize_t bufsize, int *fd)
|
||||||
|
{
|
||||||
|
ssize_t size;
|
||||||
|
|
||||||
|
if (fd) {
|
||||||
|
struct msghdr msg;
|
||||||
|
struct iovec iov;
|
||||||
|
union
|
||||||
|
{
|
||||||
|
struct cmsghdr cmsghdr;
|
||||||
|
char control[CMSG_SPACE(sizeof (int))];
|
||||||
|
} cmsgu;
|
||||||
|
struct cmsghdr *cmsg;
|
||||||
|
|
||||||
|
iov.iov_base = buf;
|
||||||
|
iov.iov_len = bufsize;
|
||||||
|
|
||||||
|
msg.msg_name = NULL;
|
||||||
|
msg.msg_namelen = 0;
|
||||||
|
msg.msg_iov = &iov;
|
||||||
|
msg.msg_iovlen = 1;
|
||||||
|
msg.msg_control = cmsgu.control;
|
||||||
|
msg.msg_controllen = sizeof(cmsgu.control);
|
||||||
|
size = recvmsg (sock, &msg, 0);
|
||||||
|
if (size < 0) {
|
||||||
|
perror ("recvmsg");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
cmsg = CMSG_FIRSTHDR(&msg);
|
||||||
|
if (cmsg && cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
|
||||||
|
if (cmsg->cmsg_level != SOL_SOCKET) {
|
||||||
|
fprintf (stderr, "invalid cmsg_level %d\n",
|
||||||
|
cmsg->cmsg_level);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
if (cmsg->cmsg_type != SCM_RIGHTS) {
|
||||||
|
fprintf (stderr, "invalid cmsg_type %d\n",
|
||||||
|
cmsg->cmsg_type);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
*fd = *((int *) CMSG_DATA(cmsg));
|
||||||
|
} else
|
||||||
|
*fd = -1;
|
||||||
|
} else {
|
||||||
|
size = read (sock, buf, bufsize);
|
||||||
|
if (size < 0) {
|
||||||
|
perror("read");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return size;
|
||||||
|
}
|
||||||
3
netcon/sendfd.h
Normal file
3
netcon/sendfd.h
Normal file
@ -0,0 +1,3 @@
|
|||||||
|
|
||||||
|
ssize_t sock_fd_write(int sock, int fd);
|
||||||
|
ssize_t sock_fd_read(int sock, void *buf, ssize_t bufsize, int *fd);
|
||||||
93
netcon/utils.c
Normal file
93
netcon/utils.c
Normal file
@ -0,0 +1,93 @@
|
|||||||
|
/*
|
||||||
|
* ZeroTier One - Network Virtualization Everywhere
|
||||||
|
* Copyright (C) 2011-2015 ZeroTier, Inc.
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*
|
||||||
|
* --
|
||||||
|
*
|
||||||
|
* ZeroTier may be used and distributed under the terms of the GPLv3, which
|
||||||
|
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
|
||||||
|
*
|
||||||
|
* If you would like to embed ZeroTier into a commercial application or
|
||||||
|
* redistribute it in a modified binary form, please contact ZeroTier Networks
|
||||||
|
* LLC. Start here: http://www.zerotier.com/
|
||||||
|
*/
|
||||||
|
|
||||||
|
void get_path_from_pid(char* dest, int pid)
|
||||||
|
{
|
||||||
|
char ppath[50];
|
||||||
|
sprintf(ppath, "/proc/%d/exe", pid);
|
||||||
|
if (readlink (ppath, dest, 50) != -1){
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void print_ip(int ip)
|
||||||
|
{
|
||||||
|
unsigned char bytes[4];
|
||||||
|
bytes[0] = ip & 0xFF;
|
||||||
|
bytes[1] = (ip >> 8) & 0xFF;
|
||||||
|
bytes[2] = (ip >> 16) & 0xFF;
|
||||||
|
bytes[3] = (ip >> 24) & 0xFF;
|
||||||
|
printf("%d.%d.%d.%d\n", bytes[0], bytes[1], bytes[2], bytes[3]);
|
||||||
|
//return buf;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* --- */
|
||||||
|
|
||||||
|
|
||||||
|
#ifdef NETCON_SERVICE
|
||||||
|
ip_addr_t convert_ip(struct sockaddr_in * addr)
|
||||||
|
{
|
||||||
|
ip_addr_t conn_addr;
|
||||||
|
struct sockaddr_in *ipv4 = addr;
|
||||||
|
short a = ip4_addr1(&(ipv4->sin_addr));
|
||||||
|
short b = ip4_addr2(&(ipv4->sin_addr));
|
||||||
|
short c = ip4_addr3(&(ipv4->sin_addr));
|
||||||
|
short d = ip4_addr4(&(ipv4->sin_addr));
|
||||||
|
IP4_ADDR(&conn_addr, a,b,c,d);
|
||||||
|
return conn_addr;
|
||||||
|
}
|
||||||
|
|
||||||
|
ip_addr_t ip_addr_sin(register struct sockaddr_in *sin) {
|
||||||
|
ip_addr_t ip;
|
||||||
|
*((struct sockaddr_in*) &ip) = *sin;
|
||||||
|
return ip;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
|
||||||
|
/* --- */
|
||||||
|
|
||||||
|
|
||||||
|
#ifdef NETCON_INTERCEPT
|
||||||
|
|
||||||
|
typedef unsigned char u8_t;
|
||||||
|
|
||||||
|
#define ip4_addr1(ipaddr) (((u8_t*)(ipaddr))[0])
|
||||||
|
#define ip4_addr2(ipaddr) (((u8_t*)(ipaddr))[1])
|
||||||
|
#define ip4_addr3(ipaddr) (((u8_t*)(ipaddr))[2])
|
||||||
|
#define ip4_addr4(ipaddr) (((u8_t*)(ipaddr))[3])
|
||||||
|
|
||||||
|
int is_local(struct sockaddr_in* addr)
|
||||||
|
{
|
||||||
|
struct sockaddr_in *ipv4 = addr;
|
||||||
|
short a = ip4_addr1(&(ipv4->sin_addr));
|
||||||
|
short b = ip4_addr2(&(ipv4->sin_addr));
|
||||||
|
short c = ip4_addr3(&(ipv4->sin_addr));
|
||||||
|
short d = ip4_addr4(&(ipv4->sin_addr));
|
||||||
|
return (a==127 && b == 0 && c == 0 && d == 1);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
Loading…
Reference in New Issue
Block a user