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@ -17,7 +17,6 @@
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*/
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#include "UDPSocket.h"
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#include "Log.h"
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#include <cassert>
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@ -26,26 +25,36 @@
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#include <cstring>
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#endif
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#if defined(HAVE_LOG_H)
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#include "Log.h"
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#else
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#define LogError(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
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#define LogInfo(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
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#endif
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CUDPSocket::CUDPSocket(const std::string& address, unsigned int port) :
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m_address(address),
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m_port(port),
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m_fd(-1)
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m_address_save(address),
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m_port_save(port),
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m_counter(0U)
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{
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assert(!address.empty());
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#if defined(_WIN32) || defined(_WIN64)
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WSAData data;
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int wsaRet = ::WSAStartup(MAKEWORD(2, 2), &data);
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if (wsaRet != 0)
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LogError("Error from WSAStartup");
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#endif
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for (int i = 0; i < UDP_SOCKET_MAX; i++) {
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m_address[i] = "";
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m_port[i] = 0U;
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m_af[i] = 0U;
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m_fd[i] = -1;
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}
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}
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CUDPSocket::CUDPSocket(unsigned int port) :
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m_address(),
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m_port(port),
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m_fd(-1)
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m_address_save(),
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m_port_save(port),
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m_counter(0U)
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{
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#if defined(_WIN32) || defined(_WIN64)
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WSAData data;
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@ -53,6 +62,12 @@ m_fd(-1)
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if (wsaRet != 0)
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LogError("Error from WSAStartup");
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#endif
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for (int i = 0; i < UDP_SOCKET_MAX; i++) {
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m_address[i] = "";
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m_port[i] = 0U;
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m_af[i] = 0U;
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m_fd[i] = -1;
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}
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}
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CUDPSocket::~CUDPSocket()
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@ -96,40 +111,64 @@ int CUDPSocket::lookup(const std::string& hostname, unsigned int port, sockaddr_
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return 0;
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}
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bool CUDPSocket::match(const sockaddr_storage& addr1, const sockaddr_storage& addr2)
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bool CUDPSocket::match(const sockaddr_storage& addr1, const sockaddr_storage& addr2, IPMATCHTYPE type)
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{
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if (addr1.ss_family != addr2.ss_family)
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return false;
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if (type == IMT_ADDRESS_AND_PORT) {
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switch (addr1.ss_family) {
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case AF_INET:
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struct sockaddr_in *in_1, *in_2;
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in_1 = (struct sockaddr_in*)&addr1;
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in_2 = (struct sockaddr_in*)&addr2;
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return ((in_1->sin_addr.s_addr == in_2->sin_addr.s_addr) && (in_1->sin_port == in_2->sin_port));
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return (in_1->sin_addr.s_addr == in_2->sin_addr.s_addr) && (in_1->sin_port == in_2->sin_port);
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case AF_INET6:
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struct sockaddr_in6 *in6_1, *in6_2;
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in6_1 = (struct sockaddr_in6*)&addr1;
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in6_2 = (struct sockaddr_in6*)&addr2;
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return (IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr) && (in6_1->sin6_port == in6_2->sin6_port));
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return IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr) && (in6_1->sin6_port == in6_2->sin6_port);
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default:
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return false;
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}
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} else if (type == IMT_ADDRESS_ONLY) {
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switch (addr1.ss_family) {
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case AF_INET:
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struct sockaddr_in *in_1, *in_2;
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in_1 = (struct sockaddr_in*)&addr1;
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in_2 = (struct sockaddr_in*)&addr2;
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return in_1->sin_addr.s_addr == in_2->sin_addr.s_addr;
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case AF_INET6:
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struct sockaddr_in6 *in6_1, *in6_2;
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in6_1 = (struct sockaddr_in6*)&addr1;
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in6_2 = (struct sockaddr_in6*)&addr2;
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return IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr);
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default:
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return false;
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}
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} else {
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return false;
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}
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}
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bool CUDPSocket::isnone(const sockaddr_storage& addr)
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bool CUDPSocket::isNone(const sockaddr_storage& addr)
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{
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struct sockaddr_in *in = (struct sockaddr_in *)&addr;
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return ((addr.ss_family == AF_INET) && (in->sin_addr.s_addr == htonl(INADDR_NONE)));
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}
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bool CUDPSocket::open()
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bool CUDPSocket::open(const sockaddr_storage& address)
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{
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return open(address.ss_family);
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}
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bool CUDPSocket::open(unsigned int af)
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{
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return open(AF_UNSPEC);
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return open(0, af, m_address_save, m_port_save);
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}
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bool CUDPSocket::open(const unsigned int af)
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bool CUDPSocket::open(const unsigned int index, const unsigned int af, const std::string& address, const unsigned int port)
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{
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sockaddr_storage addr;
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unsigned int addrlen;
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@ -140,14 +179,14 @@ bool CUDPSocket::open(const unsigned int af)
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hints.ai_family = af;
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/* to determine protocol family, call lookup() first. */
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int err = lookup(m_address, m_port, addr, addrlen, hints);
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int err = lookup(address, port, addr, addrlen, hints);
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if (err != 0) {
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LogError("The local address is invalid - %s", m_address.c_str());
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LogError("The local address is invalid - %s", address.c_str());
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return false;
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}
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m_fd = ::socket(addr.ss_family, SOCK_DGRAM, 0);
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if (m_fd < 0) {
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int fd = ::socket(addr.ss_family, SOCK_DGRAM, 0);
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if (fd < 0) {
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#if defined(_WIN32) || defined(_WIN64)
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LogError("Cannot create the UDP socket, err: %lu", ::GetLastError());
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#else
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@ -156,9 +195,14 @@ bool CUDPSocket::open(const unsigned int af)
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return false;
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}
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if (m_port > 0U) {
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m_address[index] = address;
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m_port[index] = port;
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m_af[index] = addr.ss_family;
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m_fd[index] = fd;
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if (port > 0U) {
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int reuse = 1;
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if (::setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, sizeof(reuse)) == -1) {
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if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, sizeof(reuse)) == -1) {
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#if defined(_WIN32) || defined(_WIN64)
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LogError("Cannot set the UDP socket option, err: %lu", ::GetLastError());
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#else
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@ -167,7 +211,7 @@ bool CUDPSocket::open(const unsigned int af)
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return false;
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}
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if (::bind(m_fd, (sockaddr*)&addr, addrlen) == -1) {
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if (::bind(fd, (sockaddr*)&addr, addrlen) == -1) {
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#if defined(_WIN32) || defined(_WIN64)
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LogError("Cannot bind the UDP address, err: %lu", ::GetLastError());
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#else
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@ -176,7 +220,7 @@ bool CUDPSocket::open(const unsigned int af)
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return false;
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}
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LogInfo("Opening UDP port on %u", m_port);
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LogInfo("Opening UDP port on %u", port);
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}
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return true;
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@ -188,30 +232,43 @@ int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storag
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assert(length > 0U);
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// Check that the readfrom() won't block
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fd_set readFds;
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FD_ZERO(&readFds);
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int i, n;
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struct pollfd pfd[UDP_SOCKET_MAX];
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for (i = n = 0; i < UDP_SOCKET_MAX; i++) {
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if (m_fd[i] >= 0) {
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pfd[n].fd = m_fd[i];
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pfd[n].events = POLLIN;
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n++;
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}
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}
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// no socket descriptor to receive
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if (n == 0)
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return 0;
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// Return immediately
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#if defined(_WIN32) || defined(_WIN64)
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FD_SET((unsigned int)m_fd, &readFds);
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int ret = WSAPoll(pfd, n, 0);
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#else
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FD_SET(m_fd, &readFds);
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int ret = ::poll(pfd, n, 0);
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#endif
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// Return immediately
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timeval tv;
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tv.tv_sec = 0L;
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tv.tv_usec = 0L;
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int ret = ::select(m_fd + 1, &readFds, NULL, NULL, &tv);
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if (ret < 0) {
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#if defined(_WIN32) || defined(_WIN64)
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LogError("Error returned from UDP select, err: %lu", ::GetLastError());
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LogError("Error returned from UDP poll, err: %lu", ::GetLastError());
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#else
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LogError("Error returned from UDP select, err: %d", errno);
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LogError("Error returned from UDP poll, err: %d", errno);
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#endif
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return -1;
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}
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if (ret == 0)
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int index;
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for (i = 0; i < n; i++) {
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// round robin
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index = (i + m_counter) % n;
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if (pfd[index].revents & POLLIN)
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break;
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}
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if (i == n)
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return 0;
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#if defined(_WIN32) || defined(_WIN64)
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@ -221,9 +278,9 @@ int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storag
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#endif
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#if defined(_WIN32) || defined(_WIN64)
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int len = ::recvfrom(m_fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
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int len = ::recvfrom(pfd[index].fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
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#else
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ssize_t len = ::recvfrom(m_fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
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ssize_t len = ::recvfrom(pfd[index].fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
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#endif
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if (len <= 0) {
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#if defined(_WIN32) || defined(_WIN64)
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@ -234,6 +291,7 @@ int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storag
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return -1;
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}
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m_counter++;
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address_length = size;
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return len;
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}
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@ -243,36 +301,52 @@ bool CUDPSocket::write(const unsigned char* buffer, unsigned int length, const s
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assert(buffer != NULL);
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assert(length > 0U);
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bool result = false;
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for (int i = 0; i < UDP_SOCKET_MAX; i++) {
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if (m_fd[i] < 0 || m_af[i] != address.ss_family)
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continue;
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#if defined(_WIN32) || defined(_WIN64)
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int ret = ::sendto(m_fd, (char *)buffer, length, 0, (sockaddr *)&address, address_length);
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int ret = ::sendto(m_fd[i], (char *)buffer, length, 0, (sockaddr *)&address, address_length);
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#else
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ssize_t ret = ::sendto(m_fd, (char *)buffer, length, 0, (sockaddr *)&address, address_length);
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ssize_t ret = ::sendto(m_fd[i], (char *)buffer, length, 0, (sockaddr *)&address, address_length);
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#endif
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if (ret < 0) {
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#if defined(_WIN32) || defined(_WIN64)
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LogError("Error returned from sendto, err: %lu", ::GetLastError());
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#else
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LogError("Error returned from sendto, err: %d", errno);
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#endif
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return false;
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}
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} else {
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#if defined(_WIN32) || defined(_WIN64)
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if (ret != int(length))
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return false;
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if (ret == int(length))
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result = true;
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#else
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if (ret != ssize_t(length))
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return false;
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if (ret == ssize_t(length))
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result = true;
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#endif
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}
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}
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return true;
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return result;
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}
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void CUDPSocket::close()
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{
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for (int i = 0; i < UDP_SOCKET_MAX; i++)
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close(m_fd[i]);
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}
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void CUDPSocket::close(const unsigned int index)
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{
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if (m_fd[index] >= 0) {
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#if defined(_WIN32) || defined(_WIN64)
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::closesocket(m_fd);
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::closesocket(m_fd[index]);
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#else
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::close(m_fd);
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::close(m_fd[index]);
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#endif
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m_fd[index] = -1;
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}
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}
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Jonathan Naylor
4 years ago