initial sources
This commit is contained in:
Joseph Henry
571
src/SDK_Intercept.c
Normal file
571
src/SDK_Intercept.c
Normal file
@@ -0,0 +1,571 @@
|
||||
/*
|
||||
* 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/
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
#include <stdlib.h>
|
||||
#include <dlfcn.h>
|
||||
#include <strings.h>
|
||||
#include <pwd.h>
|
||||
#include <errno.h>
|
||||
#include <stdarg.h>
|
||||
#include <netdb.h>
|
||||
#include <string.h>
|
||||
#include <fcntl.h>
|
||||
#include <pthread.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/poll.h>
|
||||
#include <sys/un.h>
|
||||
#include <sys/resource.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <netinet/in.h>
|
||||
|
||||
#if defined(__linux__)
|
||||
#include <linux/errno.h>
|
||||
#include <sys/syscall.h>
|
||||
#include <linux/net.h>
|
||||
#endif
|
||||
|
||||
#include "SDK.h"
|
||||
#include "SDK_Debug.h"
|
||||
#include "SDK_RPC.h"
|
||||
|
||||
int set_netpath(char * path);
|
||||
char *netpath = (char *)0;
|
||||
void dwr(int level, const char *fmt, ... );
|
||||
const char *get_netpath();
|
||||
|
||||
pthread_key_t thr_id_key;
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// --------------------- Get Original socket API pointers -----------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
|
||||
void load_symbols()
|
||||
{
|
||||
dwr(MSG_DEBUG,"load_symbols\n");
|
||||
|
||||
#if defined(__linux__)
|
||||
realaccept4 = dlsym(RTLD_NEXT, "accept4");
|
||||
#if !defined(__ANDROID__)
|
||||
realsyscall = dlsym(RTLD_NEXT, "syscall");
|
||||
#endif
|
||||
#endif
|
||||
realsetsockopt = (int(*)(SETSOCKOPT_SIG))dlsym(RTLD_NEXT, "setsockopt");
|
||||
realgetsockopt = (int(*)(GETSOCKOPT_SIG))dlsym(RTLD_NEXT, "getsockopt");
|
||||
realsocket = (int(*)(SOCKET_SIG))dlsym(RTLD_NEXT, "socket");
|
||||
realconnect = (int(*)(CONNECT_SIG))dlsym(RTLD_NEXT, "connect");
|
||||
realaccept = (int(*)(ACCEPT_SIG))dlsym(RTLD_NEXT, "accept");
|
||||
reallisten = (int(*)(LISTEN_SIG))dlsym(RTLD_NEXT, "listen");
|
||||
realclose = (int(*)(CLOSE_SIG))dlsym(RTLD_NEXT, "close");
|
||||
realgetsockname = (int(*)(GETSOCKNAME_SIG))dlsym(RTLD_NEXT, "getsockname");
|
||||
#if !defined(__ANDROID__)
|
||||
realbind = (int(*)(BIND_SIG))dlsym(RTLD_NEXT, "bind");
|
||||
realsendto = (ssize_t(*)(int, const void *, size_t, int, const struct sockaddr *, socklen_t))dlsym(RTLD_NEXT, "sendto");
|
||||
realrecvfrom = (int(*)(RECVFROM_SIG))dlsym(RTLD_NEXT, "recvfrom");
|
||||
realrecvmsg = (int(*)(RECVMSG_SIG))dlsym(RTLD_NEXT, "recvmsg");
|
||||
#endif
|
||||
dwr(MSG_DEBUG,"complete\n");
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------------- Intercept Setup ------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// Return whether 'intercept' shim is enabled for this thread
|
||||
|
||||
bool check_intercept_enabled_for_thread() {
|
||||
dwr(MSG_DEBUG_EXTRA, "check_intercept_enabled_for_thread()\n");
|
||||
if(!realconnect){
|
||||
load_symbols();
|
||||
}
|
||||
void *spec = pthread_getspecific(thr_id_key);
|
||||
int thr_id = spec != NULL ? *((int*)spec) : -1;
|
||||
return thr_id == INTERCEPT_ENABLED;
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------- connected_to_service() -----------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// Check whether or not the socket is mapped to the service. We
|
||||
// need to know if this is a regular AF_LOCAL socket or an end of a socketpair
|
||||
// that the service uses. We don't want to keep state in the intercept, so
|
||||
// we simply ask the service via an RPC
|
||||
|
||||
int connected_to_service(int sockfd)
|
||||
{
|
||||
socklen_t len;
|
||||
struct sockaddr_storage addr;
|
||||
len = sizeof addr;
|
||||
struct sockaddr_un * addr_un;
|
||||
getpeername(sockfd, (struct sockaddr*)&addr, &len);
|
||||
if (addr.ss_family == AF_LOCAL || addr.ss_family == AF_LOCAL) {
|
||||
addr_un = (struct sockaddr_un*)&addr;
|
||||
return strcmp(addr_un->sun_path, netpath) == 0;
|
||||
}
|
||||
dwr(MSG_DEBUG,"connected_to_service(): Not connected to service\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------------------ sendto() --------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd, const void *buf, size_t len, int flags,
|
||||
// const struct sockaddr *addr, socklen_t addr_len
|
||||
|
||||
#if !defined(__ANDROID__)
|
||||
ssize_t sendto(SENDTO_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "sendto(%d, %d)\n", sockfd, len);
|
||||
//if (!check_intercept_enabled_for_thread())
|
||||
return realsendto(sockfd, buf, len, flags, addr, addr_len);
|
||||
return zt_sendto(sockfd, buf, len, flags, addr, addr_len);
|
||||
}
|
||||
#endif
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ----------------------------------- sendmsg() --------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int socket, const struct msghdr *message, int flags
|
||||
|
||||
#if !defined(__ANDROID__)
|
||||
ssize_t sendmsg(SENDMSG_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "sendmsg()\n");
|
||||
//if(!check_intercept_enabled_for_thread())
|
||||
return realsendmsg(socket, message, flags);
|
||||
zt_sendmsg(socket, message, flags);
|
||||
}
|
||||
#endif
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ---------------------------------- recvfrom() --------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int socket, void *restrict buffer, size_t length, int flags, struct sockaddr
|
||||
// *restrict address, socklen_t *restrict address_len
|
||||
|
||||
#if !defined(__ANDROID__)
|
||||
ssize_t recvfrom(RECVFROM_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "recvfrom(%d)\n", socket);
|
||||
//if(!check_intercept_enabled_for_thread())
|
||||
return realrecvfrom(socket, buffer, length, flags, address, address_len);
|
||||
return zt_recvfrom(socket, buffer, length, flags, address, address_len);
|
||||
}
|
||||
#endif
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ----------------------------------- recvmsg() --------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int socket, struct msghdr *message, int flags
|
||||
|
||||
#if !defined(__ANDROID__)
|
||||
ssize_t recvmsg(RECVMSG_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "recvmsg(%d)\n", socket);
|
||||
//if(!check_intercept_enabled_for_thread())
|
||||
return realrecvmsg(socket, message, flags);
|
||||
return zt_recvmsg(socket, message, flags);
|
||||
}
|
||||
#endif
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// --------------------------------- setsockopt() -------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int socket, int level, int option_name, const void *option_value,
|
||||
// socklen_t option_len
|
||||
|
||||
int setsockopt(SETSOCKOPT_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "setsockopt(%d)\n", socket);
|
||||
if (!check_intercept_enabled_for_thread())
|
||||
return realsetsockopt(socket, level, option_name, option_value, option_len);
|
||||
#if defined(__linux__)
|
||||
if(level == SOL_IPV6 && option_name == IPV6_V6ONLY)
|
||||
return 0;
|
||||
if(level == SOL_IP && (option_name == IP_TTL || option_name == IP_TOS))
|
||||
return 0;
|
||||
#endif
|
||||
if(level == IPPROTO_TCP || (level == SOL_SOCKET && option_name == SO_KEEPALIVE))
|
||||
return 0;
|
||||
if(realsetsockopt(socket, level, option_name, option_value, option_len) < 0)
|
||||
perror("setsockopt():\n");
|
||||
return zt_setsockopt(socket, level, option_name, option_value, option_len);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// --------------------------------- getsockopt() -------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd, int level, int optname, void *optval,
|
||||
// socklen_t *optlen
|
||||
|
||||
int getsockopt(GETSOCKOPT_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "getsockopt(%d)\n", sockfd);
|
||||
if (!check_intercept_enabled_for_thread() || !connected_to_service(sockfd))
|
||||
return realgetsockopt(sockfd, level, optname, optval, optlen);
|
||||
return zt_getsockopt(sockfd, level, optname, optval, optlen);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ----------------------------------- socket() ---------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int socket_family, int socket_type, int protocol
|
||||
|
||||
int socket(SOCKET_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "socket()\n");
|
||||
if (!check_intercept_enabled_for_thread() && socket_type) {
|
||||
int err = realsocket(socket_family, socket_type, protocol);
|
||||
if(err < 0) {
|
||||
perror("socket:\n");
|
||||
}
|
||||
else {
|
||||
dwr(MSG_DEBUG, " socket() = %d\n", err);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
// Check if local
|
||||
if(socket_family == AF_LOCAL
|
||||
#if defined(__linux__)
|
||||
|| socket_family == AF_NETLINK
|
||||
#endif
|
||||
|| socket_family == AF_UNIX) {
|
||||
int err = realsocket(socket_family, socket_type, protocol);
|
||||
dwr(MSG_DEBUG,"realsocket() = %d\n", err);
|
||||
return err;
|
||||
}
|
||||
return zt_socket(socket_family, socket_type, protocol);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ---------------------------------- connect() ---------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int __fd, const struct sockaddr * __addr, socklen_t __len
|
||||
|
||||
int connect(CONNECT_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG, "connect(%d)\n", __fd);
|
||||
struct sockaddr_in *connaddr;
|
||||
connaddr = (struct sockaddr_in *)__addr;
|
||||
if(__addr->sa_family == AF_LOCAL || __addr->sa_family == AF_UNIX) {
|
||||
struct sockaddr_storage storage;
|
||||
memcpy(&storage, __addr, __len);
|
||||
struct sockaddr_un *s_un = (struct sockaddr_un*)&storage;
|
||||
dwr(MSG_DEBUG, "connect(): address = %s\n", s_un->sun_path);
|
||||
}
|
||||
|
||||
int port = connaddr->sin_port;
|
||||
int ip = connaddr->sin_addr.s_addr;
|
||||
unsigned char d[4];
|
||||
d[0] = ip & 0xFF;
|
||||
d[1] = (ip >> 8) & 0xFF;
|
||||
d[2] = (ip >> 16) & 0xFF;
|
||||
d[3] = (ip >> 24) & 0xFF;
|
||||
dwr(MSG_DEBUG,"connect(): %d.%d.%d.%d: %d\n", d[0],d[1],d[2],d[3], ntohs(port));
|
||||
|
||||
if(!check_intercept_enabled_for_thread())
|
||||
return realconnect(__fd, __addr, __len);
|
||||
|
||||
/* Check that this is a valid fd */
|
||||
if(fcntl(__fd, F_GETFD) < 0) {
|
||||
errno = EBADF;
|
||||
return -1;
|
||||
}
|
||||
/* Check that it is a socket */
|
||||
int sock_type;
|
||||
socklen_t sock_type_len = sizeof(sock_type);
|
||||
if(getsockopt(__fd, SOL_SOCKET, SO_TYPE, (void *) &sock_type, &sock_type_len) < 0) {
|
||||
errno = ENOTSOCK;
|
||||
return -1;
|
||||
}
|
||||
#if defined(__linux__)
|
||||
/* Check family */
|
||||
if (connaddr->sin_family < 0 || connaddr->sin_family >= NPROTO){
|
||||
errno = EAFNOSUPPORT;
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
/* make sure we don't touch any standard outputs */
|
||||
if(__fd == 0 || __fd == 1 || __fd == 2)
|
||||
return(realconnect(__fd, __addr, __len));
|
||||
|
||||
if(__addr != NULL && (connaddr->sin_family == AF_LOCAL
|
||||
#if defined(__linux__)
|
||||
|| connaddr->sin_family == PF_NETLINK
|
||||
|| connaddr->sin_family == AF_NETLINK
|
||||
#endif
|
||||
|| connaddr->sin_family == AF_UNIX)) {
|
||||
return realconnect(__fd, __addr, __len);
|
||||
}
|
||||
return zt_connect(__fd, __addr, __len);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------------------ bind() ----------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd, const struct sockaddr *addr, socklen_t addrlen
|
||||
|
||||
int bind(BIND_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG,"bind(%d)\n", sockfd);
|
||||
// make sure we don't touch any standard outputs
|
||||
if(sockfd == 0 || sockfd == 1 || sockfd == 2)
|
||||
return(realbind(sockfd, addr, addrlen));
|
||||
struct sockaddr_in *connaddr;
|
||||
connaddr = (struct sockaddr_in *)addr;
|
||||
|
||||
if(connaddr->sin_family == AF_LOCAL
|
||||
#if defined(__linux__)
|
||||
|| connaddr->sin_family == AF_NETLINK
|
||||
#endif
|
||||
|| connaddr->sin_family == AF_UNIX) {
|
||||
int err = realbind(sockfd, addr, addrlen);
|
||||
dwr(MSG_DEBUG,"realbind, err = %d\n", err);
|
||||
return err;
|
||||
}
|
||||
int port = connaddr->sin_port;
|
||||
int ip = connaddr->sin_addr.s_addr;
|
||||
unsigned char d[4];
|
||||
d[0] = ip & 0xFF;
|
||||
d[1] = (ip >> 8) & 0xFF;
|
||||
d[2] = (ip >> 16) & 0xFF;
|
||||
d[3] = (ip >> 24) & 0xFF;
|
||||
dwr(MSG_DEBUG,"bind(): %d.%d.%d.%d: %d\n", d[0],d[1],d[2],d[3], ntohs(port));
|
||||
|
||||
int sock_type;
|
||||
socklen_t sock_type_len = sizeof(sock_type);
|
||||
if(getsockopt(sockfd, SOL_SOCKET, SO_TYPE, (void *) &sock_type, &sock_type_len) < 0) {
|
||||
errno = ENOTSOCK;
|
||||
return -1;
|
||||
}
|
||||
|
||||
// Otherwise, perform usual intercept logic
|
||||
if (!check_intercept_enabled_for_thread())
|
||||
return realbind(sockfd, addr, addrlen);
|
||||
|
||||
// Check that this is a valid fd
|
||||
if(fcntl(sockfd, F_GETFD) < 0) {
|
||||
errno = EBADF;
|
||||
return -1;
|
||||
}
|
||||
// Check that it is a socket
|
||||
int opt = -1;
|
||||
socklen_t opt_len;
|
||||
if(getsockopt(sockfd, SOL_SOCKET, SO_TYPE, (void *) &opt, &opt_len) < 0) {
|
||||
errno = ENOTSOCK;
|
||||
return -1;
|
||||
}
|
||||
return zt_bind(sockfd, addr, addrlen);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ----------------------------------- accept4() --------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags
|
||||
|
||||
#if defined(__linux__)
|
||||
int accept4(ACCEPT4_SIG) {
|
||||
dwr(MSG_DEBUG,"accept4(%d):\n", sockfd);
|
||||
return zt_accept4(sockfd, addr, addrlen, flags);
|
||||
}
|
||||
#endif
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ----------------------------------- accept() ---------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd struct sockaddr *addr, socklen_t *addrlen
|
||||
|
||||
int accept(ACCEPT_SIG) {
|
||||
dwr(MSG_DEBUG,"accept(%d):\n", sockfd);
|
||||
if (!check_intercept_enabled_for_thread())
|
||||
return realaccept(sockfd, addr, addrlen);
|
||||
|
||||
/* Check that this is a valid fd */
|
||||
if(fcntl(sockfd, F_GETFD) < 0) {
|
||||
return -1;
|
||||
errno = EBADF;
|
||||
dwr(MSG_DEBUG,"EBADF\n");
|
||||
return -1;
|
||||
}
|
||||
/* Check that it is a socket */
|
||||
int opt;
|
||||
socklen_t opt_len;
|
||||
if(getsockopt(sockfd, SOL_SOCKET, SO_TYPE, (void *) &opt, &opt_len) < 0) {
|
||||
errno = ENOTSOCK;
|
||||
dwr(MSG_DEBUG,"ENOTSOCK\n");
|
||||
return -1;
|
||||
}
|
||||
/* Check that this socket supports accept() */
|
||||
if(!(opt && (SOCK_STREAM | SOCK_SEQPACKET))) {
|
||||
errno = EOPNOTSUPP;
|
||||
dwr(MSG_DEBUG,"EOPNOTSUPP\n");
|
||||
return -1;
|
||||
}
|
||||
/* Check that we haven't hit the soft-limit file descriptors allowed */
|
||||
struct rlimit rl;
|
||||
getrlimit(RLIMIT_NOFILE, &rl);
|
||||
if(sockfd >= rl.rlim_cur){
|
||||
errno = EMFILE;
|
||||
dwr(MSG_DEBUG,"EMFILE\n");
|
||||
return -1;
|
||||
}
|
||||
/* Check address length */
|
||||
if(addrlen < 0) {
|
||||
errno = EINVAL;
|
||||
dwr(MSG_DEBUG,"EINVAL\n");
|
||||
return -1;
|
||||
}
|
||||
/* redirect calls for standard I/O descriptors to kernel */
|
||||
if(sockfd == 0 || sockfd == 1 || sockfd == 2){
|
||||
dwr(MSG_DEBUG,"realaccept():\n");
|
||||
return(realaccept(sockfd, addr, addrlen));
|
||||
}
|
||||
|
||||
return zt_accept(sockfd, addr, addrlen);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------------------- listen()--------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd, int backlog
|
||||
|
||||
int listen(LISTEN_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG,"listen(%d):\n", sockfd);
|
||||
if (!check_intercept_enabled_for_thread())
|
||||
return reallisten(sockfd, backlog);
|
||||
|
||||
int sock_type;
|
||||
socklen_t sock_type_len = sizeof(sock_type);
|
||||
/* Check that this is a valid fd */
|
||||
if(fcntl(sockfd, F_GETFD) < 0) {
|
||||
errno = EBADF;
|
||||
return -1;
|
||||
}
|
||||
/* Check that it is a socket */
|
||||
if(getsockopt(sockfd, SOL_SOCKET, SO_TYPE, (void *) &sock_type, &sock_type_len) < 0) {
|
||||
errno = ENOTSOCK;
|
||||
return -1;
|
||||
}
|
||||
/* Check that this socket supports accept() */
|
||||
if(!(sock_type && (SOCK_STREAM | SOCK_SEQPACKET))) {
|
||||
errno = EOPNOTSUPP;
|
||||
return -1;
|
||||
}
|
||||
/* make sure we don't touch any standard outputs */
|
||||
if(sockfd == 0 || sockfd == 1 || sockfd == 2)
|
||||
return reallisten(sockfd, backlog);
|
||||
|
||||
if(!connected_to_service(sockfd)) {
|
||||
return reallisten(sockfd, backlog);
|
||||
}
|
||||
return zt_listen(sockfd, backlog);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------------------- close() --------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int fd
|
||||
|
||||
int close(CLOSE_SIG) {
|
||||
dwr(MSG_DEBUG, " close(%d)\n", fd);
|
||||
check_intercept_enabled_for_thread();
|
||||
return realclose(fd);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// -------------------------------- getsockname() -------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
// int sockfd, struct sockaddr *addr, socklen_t *addrlen
|
||||
|
||||
int getsockname(GETSOCKNAME_SIG)
|
||||
{
|
||||
dwr(MSG_DEBUG,"getsockname(%d):\n", sockfd);
|
||||
#if !defined(__IOS__)
|
||||
if (!check_intercept_enabled_for_thread())
|
||||
return realgetsockname(sockfd, addr, addrlen);
|
||||
#endif
|
||||
dwr(MSG_DEBUG,"getsockname(%d)\n", sockfd);
|
||||
if(!connected_to_service(sockfd)) {
|
||||
dwr(MSG_DEBUG,"getsockname(): not used by service\n");
|
||||
return realgetsockname(sockfd, addr, addrlen);
|
||||
}
|
||||
return zt_getsockname(sockfd, addr, addrlen);
|
||||
}
|
||||
|
||||
|
||||
// ------------------------------------------------------------------------------
|
||||
// ------------------------------------ syscall() -------------------------------
|
||||
// ------------------------------------------------------------------------------
|
||||
|
||||
#if !defined(__ANDROID__)
|
||||
#if defined(__linux__)
|
||||
long syscall(SYSCALL_SIG)
|
||||
{
|
||||
va_list ap;
|
||||
uintptr_t a,b,c,d,e,f;
|
||||
va_start(ap, number);
|
||||
a=va_arg(ap, uintptr_t);
|
||||
b=va_arg(ap, uintptr_t);
|
||||
c=va_arg(ap, uintptr_t);
|
||||
d=va_arg(ap, uintptr_t);
|
||||
e=va_arg(ap, uintptr_t);
|
||||
f=va_arg(ap, uintptr_t);
|
||||
va_end(ap);
|
||||
|
||||
if (!check_intercept_enabled_for_thread())
|
||||
return realsyscall(number,a,b,c,d,e,f);
|
||||
dwr(MSG_DEBUG,"syscall(%u, ...)\n", number);
|
||||
|
||||
#if defined(__i386__)
|
||||
// TODO: Implement for 32-bit systems: syscall(__NR_socketcall, 18, args);
|
||||
// args[0] = (unsigned long) fd;
|
||||
// args[1] = (unsigned long) addr;
|
||||
// args[2] = (unsigned long) addrlen;
|
||||
// args[3] = (unsigned long) flags;
|
||||
#else
|
||||
if(number == __NR_accept4) {
|
||||
int sockfd = a;
|
||||
struct sockaddr * addr = (struct sockaddr*)b;
|
||||
socklen_t * addrlen = (socklen_t*)c;
|
||||
int flags = d;
|
||||
int old_errno = errno;
|
||||
int err = accept4(sockfd, addr, addrlen, flags);
|
||||
errno = old_errno;
|
||||
err = err == -EBADF ? -EAGAIN : err;
|
||||
return err;
|
||||
}
|
||||
#endif
|
||||
return realsyscall(number,a,b,c,d,e,f);
|
||||
}
|
||||
|
||||
#endif
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user