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renew UDPSocket to support multiple sockets

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ycs232-kbc
SASANO Takayoshi 4 years ago
parent 7128f1a0b0
commit 98231b02a5
2 changed files with 117 additions and 54 deletions
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146
YSFReflector/UDPSocket.cpp
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@ -17,7 +17,6 @@
*/
#include "UDPSocket.h"
#include "Log.h"
#include <cassert>
@ -26,26 +25,36 @@
#include <cstring>
#endif
#if defined(HAVE_LOG_H)
#include "Log.h"
#else
#define LogError(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
#define LogInfo(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
#endif
CUDPSocket::CUDPSocket(const std::string& address, unsigned int port) :
m_address(address),
m_port(port),
m_fd(-1)
m_address_save(address),
m_port_save(port),
m_counter(0U)
{
assert(!address.empty());
#if defined(_WIN32) || defined(_WIN64)
WSAData data;
int wsaRet = ::WSAStartup(MAKEWORD(2, 2), &data);
if (wsaRet != 0)
LogError("Error from WSAStartup");
#endif
for (int i = 0; i < UDP_SOCKET_MAX; i++) {
m_address[i] = "";
m_port[i] = 0U;
m_af[i] = 0U;
m_fd[i] = -1;
}
}
CUDPSocket::CUDPSocket(unsigned int port) :
m_address(),
m_port(port),
m_fd(-1)
m_address_save(),
m_port_save(port),
m_counter(0U)
{
#if defined(_WIN32) || defined(_WIN64)
WSAData data;
@ -53,6 +62,12 @@ m_fd(-1)
if (wsaRet != 0)
LogError("Error from WSAStartup");
#endif
for (int i = 0; i < UDP_SOCKET_MAX; i++) {
m_address[i] = "";
m_port[i] = 0U;
m_af[i] = 0U;
m_fd[i] = -1;
}
}
CUDPSocket::~CUDPSocket()
@ -149,6 +164,11 @@ bool CUDPSocket::open(const sockaddr_storage& address)
}
bool CUDPSocket::open(unsigned int af)
{
return open(0, af, m_address_save, m_port_save);
}
bool CUDPSocket::open(const unsigned int index, const unsigned int af, const std::string& address, const unsigned int port)
{
sockaddr_storage addr;
unsigned int addrlen;
@ -159,14 +179,14 @@ bool CUDPSocket::open(unsigned int af)
hints.ai_family = af;
/* to determine protocol family, call lookup() first. */
int err = lookup(m_address, m_port, addr, addrlen, hints);
int err = lookup(address, port, addr, addrlen, hints);
if (err != 0) {
LogError("The local address is invalid - %s", m_address.c_str());
LogError("The local address is invalid - %s", address.c_str());
return false;
}
m_fd = ::socket(addr.ss_family, SOCK_DGRAM, 0);
if (m_fd < 0) {
int fd = ::socket(addr.ss_family, SOCK_DGRAM, 0);
if (fd < 0) {
#if defined(_WIN32) || defined(_WIN64)
LogError("Cannot create the UDP socket, err: %lu", ::GetLastError());
#else
@ -175,9 +195,14 @@ bool CUDPSocket::open(unsigned int af)
return false;
}
if (m_port > 0U) {
m_address[index] = address;
m_port[index] = port;
m_af[index] = addr.ss_family;
m_fd[index] = fd;
if (port > 0U) {
int reuse = 1;
if (::setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, sizeof(reuse)) == -1) {
if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, sizeof(reuse)) == -1) {
#if defined(_WIN32) || defined(_WIN64)
LogError("Cannot set the UDP socket option, err: %lu", ::GetLastError());
#else
@ -186,7 +211,7 @@ bool CUDPSocket::open(unsigned int af)
return false;
}
if (::bind(m_fd, (sockaddr*)&addr, addrlen) == -1) {
if (::bind(fd, (sockaddr*)&addr, addrlen) == -1) {
#if defined(_WIN32) || defined(_WIN64)
LogError("Cannot bind the UDP address, err: %lu", ::GetLastError());
#else
@ -195,7 +220,7 @@ bool CUDPSocket::open(unsigned int af)
return false;
}
LogInfo("Opening UDP port on %u", m_port);
LogInfo("Opening UDP port on %u", port);
}
return true;
@ -207,30 +232,43 @@ int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storag
assert(length > 0U);
// Check that the readfrom() won't block
fd_set readFds;
FD_ZERO(&readFds);
int i, n;
struct pollfd pfd[UDP_SOCKET_MAX];
for (i = n = 0; i < UDP_SOCKET_MAX; i++) {
if (m_fd[i] >= 0) {
pfd[n].fd = m_fd[i];
pfd[n].events = POLLIN;
n++;
}
}
// no socket descriptor to receive
if (n == 0)
return 0;
// Return immediately
#if defined(_WIN32) || defined(_WIN64)
FD_SET((unsigned int)m_fd, &readFds);
int ret = WSAPoll(pfd, n, 0);
#else
FD_SET(m_fd, &readFds);
int ret = ::poll(pfd, n, 0);
#endif
// Return immediately
timeval tv;
tv.tv_sec = 0L;
tv.tv_usec = 0L;
int ret = ::select(m_fd + 1, &readFds, NULL, NULL, &tv);
if (ret < 0) {
#if defined(_WIN32) || defined(_WIN64)
LogError("Error returned from UDP select, err: %lu", ::GetLastError());
LogError("Error returned from UDP poll, err: %lu", ::GetLastError());
#else
LogError("Error returned from UDP select, err: %d", errno);
LogError("Error returned from UDP poll, err: %d", errno);
#endif
return -1;
}
if (ret == 0)
int index;
for (i = 0; i < n; i++) {
// round robin
index = (i + m_counter) % n;
if (pfd[index].revents & POLLIN)
break;
}
if (i == n)
return 0;
#if defined(_WIN32) || defined(_WIN64)
@ -240,9 +278,9 @@ int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storag
#endif
#if defined(_WIN32) || defined(_WIN64)
int len = ::recvfrom(m_fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
int len = ::recvfrom(pfd[index].fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
#else
ssize_t len = ::recvfrom(m_fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
ssize_t len = ::recvfrom(pfd[index].fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
#endif
if (len <= 0) {
#if defined(_WIN32) || defined(_WIN64)
@ -253,8 +291,8 @@ int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storag
return -1;
}
m_counter++;
address_length = size;
return len;
}
@ -263,36 +301,52 @@ bool CUDPSocket::write(const unsigned char* buffer, unsigned int length, const s
assert(buffer != NULL);
assert(length > 0U);
bool result = false;
for (int i = 0; i < UDP_SOCKET_MAX; i++) {
if (m_fd[i] < 0 || m_af[i] != address.ss_family)
continue;
#if defined(_WIN32) || defined(_WIN64)
int ret = ::sendto(m_fd, (char *)buffer, length, 0, (sockaddr *)&address, address_length);
int ret = ::sendto(m_fd[i], (char *)buffer, length, 0, (sockaddr *)&address, address_length);
#else
ssize_t ret = ::sendto(m_fd, (char *)buffer, length, 0, (sockaddr *)&address, address_length);
ssize_t ret = ::sendto(m_fd[i], (char *)buffer, length, 0, (sockaddr *)&address, address_length);
#endif
if (ret < 0) {
#if defined(_WIN32) || defined(_WIN64)
LogError("Error returned from sendto, err: %lu", ::GetLastError());
#else
LogError("Error returned from sendto, err: %d", errno);
#endif
return false;
}
} else {
#if defined(_WIN32) || defined(_WIN64)
if (ret != int(length))
return false;
if (ret == int(length))
result = true;
#else
if (ret != ssize_t(length))
return false;
if (ret == ssize_t(length))
result = true;
#endif
}
}
return true;
return result;
}
void CUDPSocket::close()
{
for (int i = 0; i < UDP_SOCKET_MAX; i++)
close(m_fd[i]);
}
void CUDPSocket::close(const unsigned int index)
{
if (m_fd[index] >= 0) {
#if defined(_WIN32) || defined(_WIN64)
::closesocket(m_fd);
::closesocket(m_fd[index]);
#else
::close(m_fd);
::close(m_fd[index]);
#endif
m_fd[index] = -1;
}
}

19
YSFReflector/UDPSocket.h
Unescape View File

@ -26,6 +26,7 @@
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <poll.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
@ -35,6 +36,10 @@
#include <ws2tcpip.h>
#endif
#if !defined(UDP_SOCKET_MAX)
#define UDP_SOCKET_MAX 1
#endif
enum IPMATCHTYPE {
IMT_ADDRESS_AND_PORT,
IMT_ADDRESS_ONLY
@ -48,24 +53,28 @@ public:
bool open(unsigned int af = AF_UNSPEC);
bool open(const sockaddr_storage& address);
bool open(const unsigned int index, const unsigned int af, const std::string& address, const unsigned int port);
int read(unsigned char* buffer, unsigned int length, sockaddr_storage& address, unsigned int &address_length);
bool write(const unsigned char* buffer, unsigned int length, const sockaddr_storage& address, unsigned int address_length);
void close();
void close(const unsigned int index);
static int lookup(const std::string& hostName, unsigned int port, sockaddr_storage& address, unsigned int& address_length);
static int lookup(const std::string& hostName, unsigned int port, sockaddr_storage& address, unsigned int& address_length, struct addrinfo& hints);
static bool match(const sockaddr_storage& addr1, const sockaddr_storage& addr2, IPMATCHTYPE type = IMT_ADDRESS_AND_PORT);
static bool isNone(const sockaddr_storage& addr);
private:
std::string m_address;
unsigned short m_port;
int m_fd;
std::string m_address_save;
unsigned short m_port_save;
std::string m_address[UDP_SOCKET_MAX];
unsigned short m_port[UDP_SOCKET_MAX];
unsigned int m_af[UDP_SOCKET_MAX];
int m_fd[UDP_SOCKET_MAX];
unsigned int m_counter;
};
#endif

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