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Add simple SOCKS5 proxy mode

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If the environment variable PROXYCHAINS_SOCKS5 is set to a port number,
the configuration will be a single chain with a SOCKS5 proxy on
localhost:{that port}.

Additionally, setting the PROXYCHAINS_DNS environment variable (to any
value at all) will cause DNS queries to be proxied.
This commit is contained in:
Benjamin R. Haskell 2012-09-28 02:32:04 -04:00
parent c4decf6da2
commit d3516a1c28
2 changed files with 50 additions and 8 deletions
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2
src/common.h
View File

@ -1,6 +1,8 @@
#define PROXYCHAINS_CONF_FILE_ENV_VAR "PROXYCHAINS_CONF_FILE"
#define PROXYCHAINS_QUIET_MODE_ENV_VAR "PROXYCHAINS_QUIET_MODE"
#define PROXYCHAINS_CONF_FILE "proxychains.conf"
#define PROXYCHAINS_SOCKS5_ENV_VAR "PROXYCHAINS_SOCKS5"
#define PROXYCHAINS_DNS_ENV_VAR "PROXYCHAINS_DNS"
#define LOG_PREFIX "[proxychains] "
#define PROXYCHAINS_VERSION_MAJOR 4

56
src/libproxychains.c
View File

@ -72,7 +72,9 @@ pthread_once_t init_once = PTHREAD_ONCE_INIT;
#endif
static int init_l = 0;
static void load_default_settings(chain_type *ct);
static inline void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct);
static void simple_socks5_env(proxy_data * pd, unsigned int *proxy_count, chain_type * ct);
static void* load_sym(char* symname, void* proxyfunc) {
@ -101,6 +103,9 @@ static void do_init(void) {
MUTEX_INIT(&internal_getsrvbyname_lock, NULL);
#endif
/* check for simple SOCKS5 proxy setup */
simple_socks5_env(proxychains_pd, &proxychains_proxy_count, &proxychains_ct);
/* read the config file */
get_chain_data(proxychains_pd, &proxychains_proxy_count, &proxychains_ct);
@ -162,6 +167,19 @@ open_config_file() {
return file;
}
/* default settings common to get_chain_data and simple_socks5_env */
static void load_default_settings(chain_type *ct) {
char *env;
tcp_read_time_out = 4 * 1000;
tcp_connect_time_out = 10 * 1000;
*ct = DYNAMIC_TYPE;
env = getenv(PROXYCHAINS_QUIET_MODE_ENV_VAR);
if(env && *env == '1')
proxychains_quiet_mode = 1;
}
/* get configuration from config file */
static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_type * ct) {
unsigned int count = 0;
@ -175,17 +193,11 @@ static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_typ
if(proxychains_got_chain_data)
return;
//Some defaults
tcp_read_time_out = 4 * 1000;
tcp_connect_time_out = 10 * 1000;
*ct = DYNAMIC_TYPE;
load_default_settings(ct);
env = get_config_path(getenv(PROXYCHAINS_CONF_FILE_ENV_VAR), buff, sizeof(buff));
file = fopen(env, "r");
env = getenv(PROXYCHAINS_QUIET_MODE_ENV_VAR);
if(env && *env == '1')
proxychains_quiet_mode = 1;
while(fgets(buff, sizeof(buff), file)) {
if(buff[0] != '\n' && buff[strspn(buff, " ")] != '#') {
/* proxylist has to come last */
@ -294,6 +306,34 @@ static void get_chain_data(proxy_data * pd, unsigned int *proxy_count, chain_typ
proxychains_got_chain_data = 1;
}
static void simple_socks5_env(proxy_data *pd, unsigned int *proxy_count, chain_type *ct) {
char *port_string;
if(proxychains_got_chain_data)
return;
load_default_settings(ct);
port_string = getenv(PROXYCHAINS_SOCKS5_ENV_VAR);
if(!port_string)
return;
memset(pd, 0, sizeof(proxy_data));
pd[0].ps = PLAY_STATE;
pd[0].ip.as_int = (uint32_t) inet_addr("127.0.0.1");
pd[0].port = htons((unsigned short) strtol(port_string, NULL, 0));
pd[0].pt = SOCKS5_TYPE;
proxychains_max_chain = 1;
if(getenv(PROXYCHAINS_DNS_ENV_VAR))
proxychains_resolver = 1;
*proxy_count = 1;
proxychains_got_chain_data = 1;
}
/******* HOOK FUNCTIONS *******/
int connect(int sock, const struct sockaddr *addr, socklen_t len) {