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#include "aclk_common.h"
#include "../daemon/common.h"
struct {
ACLK_PROXY_TYPE type;
const char *url_str;
} supported_proxy_types[] = {
{ .type = PROXY_TYPE_SOCKS5, .url_str = "socks5" ACLK_PROXY_PROTO_ADDR_SEPARATOR },
{ .type = PROXY_TYPE_SOCKS5, .url_str = "socks5h" ACLK_PROXY_PROTO_ADDR_SEPARATOR },
{ .type = PROXY_TYPE_UNKNOWN, .url_str = NULL },
};
static inline ACLK_PROXY_TYPE aclk_find_proxy(const char *string)
{
int i = 0;
while( supported_proxy_types[i].url_str ) {
if(!strncmp(supported_proxy_types[i].url_str, string, strlen(supported_proxy_types[i].url_str)))
return supported_proxy_types[i].type;
i++;
}
return PROXY_TYPE_UNKNOWN;
}
ACLK_PROXY_TYPE aclk_verify_proxy(const char *string)
{
if(!string)
return PROXY_TYPE_UNKNOWN;
while(*string == 0x20)
string++;
if(!*string)
return PROXY_TYPE_UNKNOWN;
return aclk_find_proxy(string);
}
// helper function to censor user&password
// for logging purposes
void safe_log_proxy_censor(char *proxy) {
size_t length = strlen(proxy);
char *auth = proxy+length-1;
char *cur;
while( (auth >= proxy) && (*auth != '@') )
auth--;
//if not found or @ is first char do nothing
if(auth<=proxy)
return;
cur = strstr(proxy, ACLK_PROXY_PROTO_ADDR_SEPARATOR);
if(!cur)
cur = proxy;
else
cur += strlen(ACLK_PROXY_PROTO_ADDR_SEPARATOR);
while(cur < auth) {
*cur='X';
cur++;
}
}
static inline void safe_log_proxy_error(char *str, const char *proxy) {
char *log = strdupz(proxy);
safe_log_proxy_censor(log);
error("%s Provided Value:\"%s\"", str, log);
freez(log);
}
static inline int check_socks_enviroment(const char **proxy) {
char *tmp = getenv("socks_proxy");
if(!tmp)
return 1;
if(aclk_verify_proxy(tmp) == PROXY_TYPE_SOCKS5) {
*proxy = tmp;
return 0;
}
safe_log_proxy_error("Environment var \"socks_proxy\" defined but of unknown format. Supported syntax: \"socks5[h]://[user:pass@]host:ip\".", tmp);
return 1;
}
const char *aclk_lws_wss_get_proxy_setting(ACLK_PROXY_TYPE *type) {
const char *proxy = config_get(CONFIG_SECTION_ACLK, ACLK_PROXY_CONFIG_VAR, ACLK_PROXY_ENV);
*type = PROXY_DISABLED;
if(strcmp(proxy, "none") == 0)
return proxy;
if(strcmp(proxy, ACLK_PROXY_ENV) == 0) {
if(check_socks_enviroment(&proxy) == 0)
*type = PROXY_TYPE_SOCKS5;
return proxy;
}
*type = aclk_verify_proxy(proxy);
if(*type == PROXY_TYPE_UNKNOWN) {
*type = PROXY_DISABLED;
safe_log_proxy_error("Config var \"" ACLK_PROXY_CONFIG_VAR "\" defined but of unknown format. Supported syntax: \"socks5[h]://[user:pass@]host:ip\".", proxy);
}
return proxy;
}
int aclk_decode_base_url(char *url, char **aclk_hostname, char **aclk_port)
{
int pos = 0;
if (!strncmp("https://", url, 8))
{
pos = 8;
}
else if (!strncmp("http://", url, 7))
{
error("Cannot connect ACLK over %s -> unencrypted link is not supported", url);
return 1;
}
int host_end = pos;
while( url[host_end] != 0 && url[host_end] != '/' && url[host_end] != ':' )
host_end++;
if (url[host_end] == 0)
{
*aclk_hostname = strdupz(url+pos);
*aclk_port = strdupz("443");
info("Setting ACLK target host=%s port=%s from %s", *aclk_hostname, *aclk_port, url);
return 0;
}
if (url[host_end] == ':')
{
*aclk_hostname = callocz(host_end - pos + 1, 1);
strncpy(*aclk_hostname, url+pos, host_end - pos);
int port_end = host_end + 1;
while (url[port_end] >= '0' && url[port_end] <= '9')
port_end++;
if (port_end - host_end > 6)
{
error("Port specified in %s is invalid", url);
return 0;
}
*aclk_port = callocz(port_end - host_end + 1, 1);
for(int i=host_end + 1; i < port_end; i++)
(*aclk_port)[i - host_end - 1] = url[i];
}
info("Setting ACLK target host=%s port=%s from %s", *aclk_hostname, *aclk_port, url);
return 0;
}
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