struct evbuffer *socks5_mkpassword_plain(const char *login, const char *password)
{
size_t ulen = strlen(login);
size_t plen = strlen(password);
size_t length = 1 /* version */ + 1 + ulen + 1 + plen;
uint8_t req[length];
req[0] = socks5_password_ver; // RFC 1929 says so
req[1] = ulen;
memcpy(&req[2], login, ulen);
req[2+ulen] = plen;
memcpy(&req[3+ulen], password, plen);
return mkevbuffer(req, length);
}
struct evbuffer *socks5_mkmethods_plain(int do_password)
{
assert(do_password == 0 || do_password == 1);
int len = sizeof(socks5_method_req) + do_password;
socks5_method_req *req = calloc(1, len);
req->ver = socks5_ver;
req->num_methods = 1 + do_password;
req->methods[0] = socks5_auth_none;
if (do_password)
req->methods[1] = socks5_auth_password;
struct evbuffer *ret = mkevbuffer(req, len);
free(req);
return ret;
}
struct evbuffer *socks5_mkcommand_plain(int socks5_cmd, const struct sockaddr_in *destaddr)
{
struct {
socks5_req head;
socks5_addr_ipv4 ip;
} PACKED req;
assert(destaddr->sin_family == AF_INET);
req.head.ver = socks5_ver;
req.head.cmd = socks5_cmd;
req.head.reserved = 0;
req.head.addrtype = socks5_addrtype_ipv4;
req.ip.addr = destaddr->sin_addr.s_addr;
req.ip.port = destaddr->sin_port;
return mkevbuffer(&req, sizeof(req));
}
static struct evbuffer *socks4_mkconnect(redsocks_client *client)
{
const redsocks_config *config = &client->instance->config;
const char *username = config->login ? config->login : "";
int len = sizeof(socks4_req) + strlen(username);
socks4_req *req = calloc(1, len);
req->ver = socks4_ver;
req->cmd = socks4_cmd_connect;
req->port = client->destaddr.sin_port;
req->addr = client->destaddr.sin_addr.s_addr;
strcpy(req->login, username);
struct evbuffer *ret = mkevbuffer(req, len);
free(req);
return ret;
}
