socket.cpp

//
//  socket.cpp
//
//  Created by Jeong YunWon on 12. 9. 7..
//
/*****************************************************************************
 Copyright (c) 2012 The Board of Trustees of the University of Illinois.
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#include <arpa/inet.h>
#include <string.h>

#include "socket.h"

#ifndef dlog
	#define dlog(...)
#endif

namespace UDT {
    struct sockaddr_in SockAddrMake(const char *ip, uint16_t port);
    struct sockaddr_in SockAddrMake(const unsigned char *binip, uint16_t port);
}

struct sockaddr_in UDT::SockAddrMake(const char *ip, uint16_t port) {
    sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(port);
    if (ip != NULL) {
        inet_pton(AF_INET, ip, &addr.sin_addr);
    } else {
        addr.sin_addr.s_addr = INADDR_ANY;
    }

    memset(&(addr.sin_zero), '\0', 8);
    return addr;
}

struct sockaddr_in UDT::SockAddrMake(const unsigned char *binip, uint16_t port) {
    sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(port);
    if (binip != NULL) {
        memcpy((void*)&addr.sin_addr, binip, 4);
    } else {
        addr.sin_addr.s_addr = INADDR_ANY;
    }
    
    memset(&(addr.sin_zero), '\0', 8);
    return addr;
}

UDT::Socket::Socket() {
    this->udtsocket = UDT::socket(AF_INET, SOCK_STREAM, 0);
    close_on_delete = true;
    
    int buf_size = UDT_DEFAULT_BUFFER;
    UDT::setsockopt(this->udtsocket, 0, UDP_SNDBUF, &buf_size, sizeof(int));
    UDT::setsockopt(this->udtsocket, 0, UDP_RCVBUF, &buf_size, sizeof(int));
}

UDT::Socket::Socket(int af, int type, int protocol) {
    this->udtsocket = UDT::socket(af, type, protocol);
    close_on_delete = true;
    
    int buf_size = UDT_DEFAULT_BUFFER;
    UDT::setsockopt(this->udtsocket, 0, UDP_SNDBUF, &buf_size, sizeof(int));
    UDT::setsockopt(this->udtsocket, 0, UDP_RCVBUF, &buf_size, sizeof(int));
}

UDT::Socket::Socket(UDTSOCKET udtsocket, bool close_on_delete) {
    this->udtsocket = udtsocket;
    this->close_on_delete = close_on_delete;
}

UDT::Socket::~Socket() {
    if (close_on_delete) {
        UDT::close(this->udtsocket);
    }
}

bool UDT::Socket::_update_error(int res) {
    if (res == UDT::ERROR) {
        // NOTE: trace stake here!
        static int counter = 0;
        counter++;
        this->error = &UDT::getlasterror();
        dlog(this->error->getErrorCode() != 6002 && counter % 20 == 0, "Socket Error! %d %s", this->error->getErrorCode(), this->error->getErrorMessage());
        return true;
    }
    this->error = NULL;
    return false;
}

int UDT::Socket::error_code() {
    if (this->error == NULL) {
        return 0;
    }
    if (this->error != &UDT::getlasterror()) {
        return -1;
    }
    return this->error->getErrorCode();
}

const char *UDTSocketErrorExpired = "Error was captured but expired";
const char *UDT::Socket::error_message() {
    if (this->error == NULL) {
        return NULL;
    }
    if (this->error != &UDT::getlasterror()) {
        return UDTSocketErrorExpired;
    }
    return this->error->getErrorMessage();
}

void UDT::Socket::set_option(SOCKOPT option, int value) {
    UDT::setsockopt(this->udtsocket, 0, option, &value, sizeof(value));
}

void UDT::Socket::set_option(SOCKOPT option, bool value) {
    UDT::setsockopt(this->udtsocket, 0, option, &value, sizeof(value));    
}

bool UDT::Socket::bind(UDT::Socket *socket) {
    sockaddr addr;
    int addr_len;
    UDT::getsockname(socket->udtsocket, &addr, &addr_len);
    int res = UDT::bind(this->udtsocket, (sockaddr *)&addr, addr_len);
    return !this->_update_error(res);
}

bool UDT::Socket::bind(const char *ip, uint16_t port) {
    sockaddr_in addr = UDT::SockAddrMake(ip, port);
    
    int res = UDT::bind(this->udtsocket, (sockaddr *)&addr, sizeof(addr));
    return !this->_update_error(res);
}

bool UDT::Socket::bind(const unsigned char *ip, uint16_t port) {
    sockaddr_in addr = UDT::SockAddrMake(ip, port);
    
    int res = UDT::bind(this->udtsocket, (sockaddr *)&addr, sizeof(addr));
    return !this->_update_error(res);
}

bool UDT::Socket::listen(int backlog) {
    int res = UDT::listen(this->udtsocket, backlog);
    return !this->_update_error(res);
}

UDT::Socket *UDT::Socket::accept() {
    struct sockaddr addr;
    int addrlen;
    UDTSOCKET socket = UDT::accept(this->udtsocket, &addr, &addrlen);
    if (this->_update_error(socket)) {
        return NULL;
    }
    return new UDT::Socket(socket);
}

bool UDT::Socket::connect(const char *ip, uint16_t port) {
    sockaddr_in addr = UDT::SockAddrMake(ip, port);
    
    int res = UDT::connect(this->udtsocket, (sockaddr *)&addr, sizeof(addr));
    return !this->_update_error(res);
}

void UDT::Socket::close() {
    UDT::close(this->udtsocket);
    close_on_delete = false;
}

size_t UDT::Socket::send(const char *data, size_t len) {
    size_t size = UDT::send(this->udtsocket, data, len, 0);
//    if (this->_update_error(size)) {
//        return 0;
//    }
    return size;
}

size_t UDT::Socket::send(void *data, size_t len) {
    return this->send((const char *)data, len);
}

size_t UDT::Socket::recv(char *buffer, size_t buffer_len) {
    size_t size = UDT::recv(this->udtsocket, buffer, buffer_len, 0);
    if (this->_update_error(size)) {
        return 0;
    }
    return size;
}

size_t UDT::Socket::recv(void *buffer, size_t buffer_len) {
    return this->recv((char *)buffer, buffer_len);
}