#include <netdb.h>
#include <sys/types.h>
#include <unistd.h> // close
+
+#include <cerrno>
#include <cstring>
+#include <stdexcept>
+
#include "stg_client.h"
using namespace std;
+void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password);
+void Encrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8);
+void Decrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8);
+
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
-STG_CLIENT::STG_CLIENT()
- : port(0),
- localPort(0),
- sock(0)
-{
-}
-//-----------------------------------------------------------------------------
-STG_CLIENT::~STG_CLIENT()
-{
-}
-//-----------------------------------------------------------------------------
-void STG_CLIENT::SetServer(const string & host)
-{
-STG_CLIENT::host = host;
-}
-//-----------------------------------------------------------------------------
-void STG_CLIENT::SetPort(uint16_t port)
-{
-STG_CLIENT::port = port;
-}
-//-----------------------------------------------------------------------------
-void STG_CLIENT::SetLocalPort(uint16_t port)
-{
-STG_CLIENT::localPort = port;
-}
-//-----------------------------------------------------------------------------
-void STG_CLIENT::SetPassword(const string & password)
-{
-STG_CLIENT::password = password;
-}
-//-----------------------------------------------------------------------------
-uint32_t STG_CLIENT::GetFramedIP() const
-{
-return framedIP;
-}
-//-----------------------------------------------------------------------------
-void STG_CLIENT::InitEncrypt()
-{
-unsigned char keyL[RAD_PASSWORD_LEN];
-memset(keyL, 0, RAD_PASSWORD_LEN);
-strncpy((char *)keyL, password.c_str(), RAD_PASSWORD_LEN);
-Blowfish_Init(&ctx, keyL, RAD_PASSWORD_LEN);
-}
-//-----------------------------------------------------------------------------
-int STG_CLIENT::PrepareNet()
+STG_CLIENT::STG_CLIENT(const std::string & host, uint16_t port, uint16_t lp, const std::string & pass)
+ : localPort(lp),
+ password(pass),
+ framedIP(0)
{
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == -1)
{
- errorStr = "Socket create error";
- return -1;
+ std::string message = strerror(errno);
+ message = "Socket create error: '" + message + "'";
+ throw std::runtime_error(message);
}
struct hostent * he = NULL;
he = gethostbyname(host.c_str());
if (he == NULL)
{
- errorStr = "gethostbyname error";
- return -1;
- }
-
-if (localPort != 0)
- {
- struct sockaddr_in localAddr;
- localAddr.sin_family = AF_INET;
- localAddr.sin_port = htons(localPort);
- localAddr.sin_addr.s_addr = inet_addr("0.0.0.0");;
-
- if (bind(sock, (struct sockaddr *)&localAddr, sizeof(localAddr)))
- {
- errorStr = "Bind failed";
- return -1;
- }
+ throw std::runtime_error("gethostbyname error");
}
outerAddr.sin_family = AF_INET;
outerAddr.sin_port = htons(port);
outerAddr.sin_addr.s_addr = *(uint32_t *)he->h_addr;
-outerAddrLen = sizeof(struct sockaddr_in);
+InitEncrypt(&ctx, password);
-return 0;
+PrepareNet();
}
//-----------------------------------------------------------------------------
-void STG_CLIENT::FinalizeNet()
+STG_CLIENT::~STG_CLIENT()
{
close(sock);
}
//-----------------------------------------------------------------------------
-int STG_CLIENT::Start()
+uint32_t STG_CLIENT::GetFramedIP() const
{
-InitEncrypt();
-
-return PrepareNet();
+return framedIP;
}
//-----------------------------------------------------------------------------
-int STG_CLIENT::Stop()
+int STG_CLIENT::PrepareNet()
{
-FinalizeNet();
+if (localPort != 0)
+ {
+ struct sockaddr_in localAddr;
+ localAddr.sin_family = AF_INET;
+ localAddr.sin_port = htons(localPort);
+ localAddr.sin_addr.s_addr = inet_addr("0.0.0.0");;
+ if (bind(sock, (struct sockaddr *)&localAddr, sizeof(localAddr)))
+ {
+ errorStr = "Bind failed";
+ return -1;
+ }
+ }
return 0;
}
//-----------------------------------------------------------------------------
{
char buf[RAD_MAX_PACKET_LEN];
-Encrypt(buf, (char *)&packet, sizeof(RAD_PACKET) / 8);
+Encrypt(&ctx, buf, (char *)&packet, sizeof(RAD_PACKET) / 8);
-int res = sendto(sock, buf, sizeof(RAD_PACKET), 0, (struct sockaddr *)&outerAddr, outerAddrLen);
+int res = sendto(sock, buf, sizeof(RAD_PACKET), 0, (struct sockaddr *)&outerAddr, sizeof(outerAddr));
if (res == -1)
errorStr = "Error sending data";
char buf[RAD_MAX_PACKET_LEN];
int res;
-outerAddrLen = sizeof(struct sockaddr_in);
+struct sockaddr_in addr;
+socklen_t len = sizeof(struct sockaddr_in);
-res = recvfrom(sock, buf, RAD_MAX_PACKET_LEN, 0, (struct sockaddr *)&outerAddr, &outerAddrLen);
+res = recvfrom(sock, buf, RAD_MAX_PACKET_LEN, 0, reinterpret_cast<struct sockaddr *>(&addr), &len);
if (res == -1)
{
errorStr = "Error receiving data";
return -1;
}
-Decrypt((char *)packet, buf, res / 8);
+Decrypt(&ctx, (char *)packet, buf, res / 8);
return 0;
}
return 0;
}
//-----------------------------------------------------------------------------
-void STG_CLIENT::Encrypt(char * dst, const char * src, int len8)
+inline
+void Encrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8)
{
// len8 - длина в 8-ми байтовых блоках
if (dst != src)
memcpy(dst, src, len8 * 8);
for (int i = 0; i < len8; i++)
- Blowfish_Encrypt(&ctx, (uint32_t *)(dst + i*8), (uint32_t *)(dst + i*8 + 4));
+ Blowfish_Encrypt(ctx, (uint32_t *)(dst + i*8), (uint32_t *)(dst + i*8 + 4));
}
-//-----------------------------------------------------------------------------
-void STG_CLIENT::Decrypt(char * dst, const char * src, int len8)
+//-----------------------------------------------------------------------------
+inline
+void Decrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8)
{
// len8 - длина в 8-ми байтовых блоках
if (dst != src)
memcpy(dst, src, len8 * 8);
for (int i = 0; i < len8; i++)
- Blowfish_Decrypt(&ctx, (uint32_t *)(dst + i*8), (uint32_t *)(dst + i*8 + 4));
+ Blowfish_Decrypt(ctx, (uint32_t *)(dst + i*8), (uint32_t *)(dst + i*8 + 4));
+}
+//-----------------------------------------------------------------------------
+inline
+void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password)
+{
+unsigned char keyL[RAD_PASSWORD_LEN];
+memset(keyL, 0, RAD_PASSWORD_LEN);
+strncpy((char *)keyL, password.c_str(), RAD_PASSWORD_LEN);
+Blowfish_Init(ctx, keyL, RAD_PASSWORD_LEN);
}
//-----------------------------------------------------------------------------