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Refactored cIptvTcpSocket class.

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This commit is contained in:
Rolf Ahrenberg 2010-09-15 23:41:25 +03:00
parent ac458b0c36
commit 7629e34d2a
4 changed files with 122 additions and 73 deletions
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3
README
View File

@ -164,6 +164,9 @@ Notes:
- Source address validation can be enabled for UDP protocol separated by
adding the source address after a ';' character: "U=239.192.0.1;239.192.0.2"
- Section id and pid scanners should be disabled after the correct data is
found. This can be made via VDR's channel editor.
Acknowledgements:
- The IPTV section filtering code is derived from Linux kernel.

79
protocolhttp.c
View File

@ -19,7 +19,7 @@
#include "protocolhttp.h"
cIptvProtocolHttp::cIptvProtocolHttp()
: streamAddr(NULL),
: streamAddr(strdup("")),
streamPath(strdup("/"))
{
debug("cIptvProtocolHttp::cIptvProtocolHttp()\n");
@ -39,49 +39,13 @@ bool cIptvProtocolHttp::Connect(void)
{
debug("cIptvProtocolHttp::Connect()\n");
// Check that stream address is valid
if (!isActive && !isempty(streamAddr) && !isempty(streamPath)) {
// First try only the IP address
sockAddr.sin_addr.s_addr = inet_addr(streamAddr);
if (sockAddr.sin_addr.s_addr == INADDR_NONE) {
debug("Cannot convert %s directly to internet address\n", streamAddr);
// It may be a host name, get the name
struct hostent *host;
host = gethostbyname(streamAddr);
if (!host) {
char tmp[64];
error("%s is not valid address: %s", streamAddr, strerror_r(h_errno, tmp, sizeof(tmp)));
return false;
}
sockAddr.sin_addr.s_addr = inet_addr(*host->h_addr_list);
}
// Ensure that socket is valid
OpenSocket(socketPort);
int err = connect(socketDesc, (struct sockaddr *)&sockAddr, sizeof(sockAddr));
// Non-blocking sockets always report in-progress error when connected
ERROR_IF_FUNC(err < 0 && errno != EINPROGRESS, "connect()", CloseSocket(), return false);
// Select with 800ms timeout on the socket completion, check if it is writable
int retval = select_single_desc(socketDesc, 800000, true);
if (retval < 0)
return retval;
// Select has returned. Get socket errors if there are any
int socketStatus = 0;
socklen_t len = sizeof(socketStatus);
getsockopt(socketDesc, SOL_SOCKET, SO_ERROR, &socketStatus, &len);
// If not any errors, then socket must be ready and connected
if (socketStatus != 0) {
char tmp[64];
error("Cannot connect to %s: %s", streamAddr, strerror_r(socketStatus, tmp, sizeof(tmp)));
if (!isempty(streamAddr) && !isempty(streamPath)) {
// Ensure that socket is valid and connect
OpenSocket(socketPort, streamAddr);
if (!ConnectSocket()) {
CloseSocket();
return false;
}
// Formulate and send HTTP request
cString buffer = cString::sprintf("GET %s HTTP/1.1\r\n"
"Host: %s\r\n"
@ -89,19 +53,17 @@ bool cIptvProtocolHttp::Connect(void)
"Range: bytes=0-\r\n"
"Connection: Close\r\n"
"\r\n", streamPath, streamAddr, PLUGIN_NAME_I18N, VERSION);
debug("Sending http request: %s\n", *buffer);
ssize_t err2 = send(socketDesc, buffer, strlen(buffer), 0);
ERROR_IF_FUNC(err2 < 0, "send()", CloseSocket(), return false);
if (!Write(*buffer, (unsigned int)strlen(*buffer))) {
CloseSocket();
return false;
}
// Now process headers
if (!ProcessHeaders()) {
CloseSocket();
return false;
}
// Update active flag
isActive = true;
}
return true;
}
@ -109,13 +71,8 @@ bool cIptvProtocolHttp::Connect(void)
bool cIptvProtocolHttp::Disconnect(void)
{
debug("cIptvProtocolHttp::Disconnect()\n");
// Check that stream address is valid
if (isActive) {
// Close the socket
CloseSocket();
// Update active flag
isActive = false;
}
return true;
}
@ -125,24 +82,14 @@ bool cIptvProtocolHttp::GetHeaderLine(char* dest, unsigned int destLen,
debug("cIptvProtocolHttp::GetHeaderLine()\n");
bool linefeed = false;
bool newline = false;
char buf[4096];
char *bufptr = buf;
unsigned char buf[4096];
unsigned char *bufptr = buf;
memset(buf, '\0', sizeof(buf));
recvLen = 0;
while (!newline || !linefeed) {
socklen_t addrlen = sizeof(sockAddr);
// Wait 500ms for data
int retval = select_single_desc(socketDesc, 500000, false);
// Check if error
if (retval < 0)
return false;
// Check if data available
else if (retval) {
ssize_t retval = recvfrom(socketDesc, bufptr, 1, MSG_DONTWAIT,
(struct sockaddr *)&sockAddr, &addrlen);
if (retval <= 0)
return false;
if (ReadChar(bufptr, 500)) {
// Parsing end conditions, if line ends with \r\n
if (linefeed && *bufptr == '\n')
newline = true;
@ -163,7 +110,7 @@ bool cIptvProtocolHttp::GetHeaderLine(char* dest, unsigned int destLen,
}
}
else {
error("No HTTP response received\n");
error("No HTTP response received in 500ms\n");
return false;
}
}

103
socket.c
View File

@ -52,7 +52,7 @@ bool cIptvSocket::OpenSocket(const int Port, const bool isUdp)
socketDesc = socket(PF_INET, SOCK_STREAM, 0);
ERROR_IF_RET(socketDesc < 0, "socket()", return false);
// Make it use non-blocking I/O to avoid stuck read calls
ERROR_IF_FUNC(fcntl(socketDesc, F_SETFL, O_NONBLOCK), "fcntl()",
ERROR_IF_FUNC(fcntl(socketDesc, F_SETFL, O_NONBLOCK), "fcntl(O_NONBLOCK)",
CloseSocket(), return false);
// Allow multiple sockets to use the same PORT number
ERROR_IF_FUNC(setsockopt(socketDesc, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0, "setsockopt(SO_REUSEADDR)",
@ -174,8 +174,11 @@ int cIptvUdpSocket::Read(unsigned char* BufferAddr, unsigned int BufferLen)
// Read data from socket
if (isActive && socketDesc && BufferAddr && (BufferLen > 0))
len = (int)recvmsg(socketDesc, &msgh, MSG_DONTWAIT);
ERROR_IF_RET(len < 0, "recvmsg()", return -1);
if (len > 0) {
if (len < 0) {
ERROR_IF(errno != EAGAIN, "recvmsg()");
return -1;
}
else if (len > 0) {
// Process auxiliary received data and validate source address
for (cmsg = CMSG_FIRSTHDR(&msgh); (sourceAddr != INADDR_ANY) && (cmsg != NULL); cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
if ((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_PKTINFO)) {
@ -231,12 +234,66 @@ cIptvTcpSocket::~cIptvTcpSocket()
debug("cIptvTcpSocket::~cIptvTcpSocket()\n");
}
bool cIptvTcpSocket::OpenSocket(const int Port)
bool cIptvTcpSocket::OpenSocket(const int Port, const char *StreamAddr)
{
debug("cIptvTcpSocket::OpenSocket()\n");
// First try only the IP address
sockAddr.sin_addr.s_addr = inet_addr(StreamAddr);
if (sockAddr.sin_addr.s_addr == INADDR_NONE) {
debug("Cannot convert %s directly to internet address\n", StreamAddr);
// It may be a host name, get the name
struct hostent *host;
host = gethostbyname(StreamAddr);
if (!host) {
char tmp[64];
error("gethostbyname() failed: %s is not valid address: %s", StreamAddr, strerror_r(h_errno, tmp, sizeof(tmp)));
return false;
}
sockAddr.sin_addr.s_addr = inet_addr(*host->h_addr_list);
}
return cIptvSocket::OpenSocket(Port, false);
}
void cIptvTcpSocket::CloseSocket(void)
{
debug("cIptvTcpSocket::CloseSocket()\n");
isActive = false;
cIptvSocket::CloseSocket();
}
bool cIptvTcpSocket::ConnectSocket(void)
{
//debug("cIptvTcpSocket::ConnectSocket()\n");
if (!isActive && (socketDesc >= 0)) {
int retval = connect(socketDesc, (struct sockaddr *)&sockAddr, sizeof(sockAddr));
// Non-blocking sockets always report in-progress error when connected
ERROR_IF_RET(retval < 0 && errno != EINPROGRESS, "connect()", return false);
// Select with 800ms timeout on the socket completion, check if it is writable
retval = select_single_desc(socketDesc, 800000, true);
if (retval < 0)
return retval;
// Select has returned. Get socket errors if there are any
retval = 0;
socklen_t len = sizeof(retval);
getsockopt(socketDesc, SOL_SOCKET, SO_ERROR, &retval, &len);
// If not any errors, then socket must be ready and connected
if (retval != 0) {
char tmp[64];
error("Connect() failed: %s", strerror_r(retval, tmp, sizeof(tmp)));
return false;
}
// Update connection flag
isActive = true;
}
return true;
}
int cIptvTcpSocket::Read(unsigned char* BufferAddr, unsigned int BufferLen)
{
//debug("cIptvTcpSocket::Read()\n");
@ -253,3 +310,41 @@ int cIptvTcpSocket::Read(unsigned char* BufferAddr, unsigned int BufferLen)
(struct sockaddr *)&sockAddr, &addrlen);
return len;
}
bool cIptvTcpSocket::ReadChar(unsigned char* BufferAddr, unsigned int TimeoutMs)
{
//debug("cIptvTcpSocket::ReadChar()\n");
// Error out if socket not initialized
if (socketDesc <= 0) {
error("Invalid socket in %s\n", __FUNCTION__);
return false;
}
socklen_t addrlen = sizeof(sockAddr);
// Wait 500ms for data
int retval = select_single_desc(socketDesc, 1000 * TimeoutMs, false);
// Check if error
if (retval < 0)
return false;
// Check if data available
else if (retval) {
retval = (int)recvfrom(socketDesc, BufferAddr, 1, MSG_DONTWAIT,
(struct sockaddr *)&sockAddr, &addrlen);
if (retval <= 0)
return false;
}
return true;
}
bool cIptvTcpSocket::Write(const char* BufferAddr, unsigned int BufferLen)
{
//debug("cIptvTcpSocket::Write()\n");
// Error out if socket not initialized
if (socketDesc <= 0) {
error("Invalid socket in %s\n", __FUNCTION__);
return false;
}
ERROR_IF_RET(send(socketDesc, BufferAddr, BufferLen, 0) < 0, "send()", return false);
return true;
}

6
socket.h
View File

@ -45,7 +45,11 @@ public:
cIptvTcpSocket();
virtual ~cIptvTcpSocket();
virtual int Read(unsigned char* BufferAddr, unsigned int BufferLen);
bool OpenSocket(const int Port);
bool OpenSocket(const int Port, const char *StreamAddr);
void CloseSocket(void);
bool ConnectSocket(void);
bool ReadChar(unsigned char* BufferAddr, unsigned int TimeoutMs);
bool Write(const char* BufferAddr, unsigned int BufferLen);
};
#endif // __IPTV_SOCKET_H