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proxychains-ng
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debloat init_lib()

pull/3/head
rofl0r 2012-04-23 19:51:14 +02:00
parent 1000366f88
commit 3260ee812a
1 changed files with 33 additions and 60 deletions
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93
src/libproxychains.c
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@ -60,74 +60,47 @@ unsigned int remote_dns_subnet = 224;
static inline void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct);
static void init_lib(void);
static void load_sym(void** funcptr, char* symname, void* proxyfunc) {
*funcptr = dlsym(RTLD_NEXT, symname);
if(!(*funcptr)) {
fprintf(stderr, "Cannot load symbol '%s' %s\n", symname, dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'connect'" " real addr %p wrapped addr %p\n", (*funcptr), proxyfunc);
}
if((*funcptr) == proxyfunc) {
PDEBUG("circular reference detected, aborting!\n");
abort();
}
}
static void init_lib(void) {
static const struct override_info {
void* funcptr;
char* symname;
void* proxyfunc;
} override_symbols[] = {
{ .funcptr = &true_connect, .symname = "connect", .proxyfunc = connect,},
{ .funcptr = &true_gethostbyname, .symname = "gethostbyname", .proxyfunc = gethostbyname,},
{ .funcptr = &true_getaddrinfo, .symname = "getaddrinfo", .proxyfunc = getaddrinfo,},
{ .funcptr = &true_freeaddrinfo, .symname = "freeaddrinfo", .proxyfunc = freeaddrinfo,},
{ .funcptr = &true_gethostbyaddr, .symname = "gethostbyaddr", .proxyfunc = gethostbyaddr,},
{ .funcptr = &true_getnameinfo, .symname = "getnameinfo", .proxyfunc = getnameinfo,},
};
unsigned i;
MUTEX_INIT(&internal_ips_lock, NULL);
/* read the config file */
get_chain_data(proxychains_pd, &proxychains_proxy_count, &proxychains_ct);
proxychains_write_log(LOG_PREFIX "DLL init\n");
true_connect = (connect_t) dlsym(RTLD_NEXT, "connect");
if(!true_connect) {
fprintf(stderr, "Cannot load symbol 'connect' %s\n", dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'connect'" " real addr %p wrapped addr %p\n", true_connect, connect);
}
if(connect == true_connect) {
PDEBUG("circular reference detected, aborting!\n");
abort();
}
true_gethostbyname = (gethostbyname_t)
dlsym(RTLD_NEXT, "gethostbyname");
if(!true_gethostbyname) {
fprintf(stderr, "Cannot load symbol 'gethostbyname' %s\n", dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'gethostbyname'"
" real addr %p wrapped addr %p\n", true_gethostbyname, gethostbyname);
}
true_getaddrinfo = (getaddrinfo_t)
dlsym(RTLD_NEXT, "getaddrinfo");
if(!true_getaddrinfo) {
fprintf(stderr, "Cannot load symbol 'getaddrinfo' %s\n", dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'getaddrinfo'" " real addr %p wrapped addr %p\n", true_getaddrinfo, getaddrinfo);
}
true_freeaddrinfo = (freeaddrinfo_t)
dlsym(RTLD_NEXT, "freeaddrinfo");
if(!true_freeaddrinfo) {
fprintf(stderr, "Cannot load symbol 'freeaddrinfo' %s\n", dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'freeaddrinfo'"
" real addr %p wrapped addr %p\n", true_freeaddrinfo, freeaddrinfo);
}
true_gethostbyaddr = (gethostbyaddr_t)
dlsym(RTLD_NEXT, "gethostbyaddr");
if(!true_gethostbyaddr) {
fprintf(stderr, "Cannot load symbol 'gethostbyaddr' %s\n", dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'gethostbyaddr'"
" real addr %p wrapped addr %p\n", true_gethostbyaddr, gethostbyaddr);
}
true_getnameinfo = (getnameinfo_t)
dlsym(RTLD_NEXT, "getnameinfo");
if(!true_getnameinfo) {
fprintf(stderr, "Cannot load symbol 'getnameinfo' %s\n", dlerror());
exit(1);
} else {
PDEBUG("loaded symbol 'getnameinfo'" " real addr %p wrapped addr %p\n", true_getnameinfo, getnameinfo);
for (i = 0; i < (sizeof(override_symbols) / sizeof(override_symbols[0])); i++) {
load_sym(override_symbols[i].funcptr, override_symbols[i].symname, override_symbols[i].proxyfunc);
}
init_l = 1;
}