mirror of
https://github.com/moonlight-stream/moonlight-common-c.git
synced 2025-08-18 09:25:49 +00:00
RTSP code style cleanup - comments
This commit is contained in:
Michelle Bergeron
parent
21ec3f0270
commit
baa8106dd8
@ -18,48 +18,46 @@
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#define FLAG_ALLOCATED_OPTION_ITEMS 0x4
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#define FLAG_ALLOCATED_PAYLOAD 0x8
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/* Linked List to store the options */
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typedef struct _OPTION_ITEM {
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char flags;
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char *option;
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char *content;
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char* option;
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char* content;
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struct _OPTION_ITEM *next;
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} OPTION_ITEM, *POPTION_ITEM;
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/* RTSP Message *
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* In this implementation, a flag indicates the message type:
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* TYPE_REQUEST = 0
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* TYPE_RESPONSE = 1 */
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// In this implementation, a flag indicates the message type:
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// TYPE_REQUEST = 0
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// TYPE_RESPONSE = 1
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typedef struct _RTSP_MESSAGE {
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char type;
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char flags;
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int sequenceNumber;
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char *protocol;
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char* protocol;
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POPTION_ITEM options;
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char *payload;
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char* payload;
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int payloadLength;
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char* messageBuffer;
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union {
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struct {
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/* Request fields */
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char *command;
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char *target;
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// Request fields
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char* command;
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char* target;
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} request;
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struct {
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/* Response fields */
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char *statusString;
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// Response fields
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char* statusString;
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int statusCode;
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} response;
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} message;
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} RTSP_MESSAGE, *PRTSP_MESSAGE;
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int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length);
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int parseRtspMessage(PRTSP_MESSAGE msg, char* rtspMessage, int length);
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void freeMessage(PRTSP_MESSAGE msg);
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void createRtspResponse(PRTSP_MESSAGE msg, char* messageBuffer, int flags, char *protocol, int statusCode, char *statusString, int sequenceNumber, POPTION_ITEM optionsHead, char *payload, int payloadLength);
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void createRtspRequest(PRTSP_MESSAGE msg, char* messageBuffer, int flags, char *command, char *target, char *protocol, int sequenceNumber, POPTION_ITEM optionsHead, char *payload, int payloadLength);
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char *getOptionContent(POPTION_ITEM optionsHead, char *option);
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void insertOption(POPTION_ITEM *optionsHead, POPTION_ITEM opt);
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void createRtspResponse(PRTSP_MESSAGE msg, char* messageBuffer, int flags, char* protocol, int statusCode, char* statusString, int sequenceNumber, POPTION_ITEM optionsHead, char* payload, int payloadLength);
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void createRtspRequest(PRTSP_MESSAGE msg, char* messageBuffer, int flags, char* command, char* target, char* protocol, int sequenceNumber, POPTION_ITEM optionsHead, char* payload, int payloadLength);
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char* getOptionContent(POPTION_ITEM optionsHead, char* option);
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void insertOption(POPTION_ITEM* optionsHead, POPTION_ITEM opt);
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void freeOptionList(POPTION_ITEM optionsHead);
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char *serializeRtspMessage(PRTSP_MESSAGE msg, int *serializedLength);
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char* serializeRtspMessage(PRTSP_MESSAGE msg, int *serializedLength);
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@ -11,7 +11,7 @@ static int hasSessionId;
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static char responseBuffer[RTSP_MAX_RESP_SIZE];
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static int rtspClientVersion;
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/* Create RTSP Option */
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// Create RTSP Option
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static POPTION_ITEM createOptionItem(char* option, char* content)
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{
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POPTION_ITEM item = malloc(sizeof(*item));
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@ -42,7 +42,7 @@ static POPTION_ITEM createOptionItem(char* option, char* content)
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return item;
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}
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/* Add an option to the RTSP Message */
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// Add an option to the RTSP Message
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static int addOption(PRTSP_MESSAGE msg, char* option, char* content)
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{
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POPTION_ITEM item = createOptionItem(option, content);
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@ -56,7 +56,7 @@ static int addOption(PRTSP_MESSAGE msg, char* option, char* content)
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return 1;
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}
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/* Create an RTSP Request */
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// Create an RTSP Request
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static int initializeRtspRequest(PRTSP_MESSAGE msg, char* command, char* target)
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{
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char sequenceNumberStr[16];
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@ -77,7 +77,7 @@ static int initializeRtspRequest(PRTSP_MESSAGE msg, char* command, char* target)
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return 1;
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}
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/* Send RTSP message and get response */
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// Send RTSP message and get response
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static int transactRtspMessage(PRTSP_MESSAGE request, PRTSP_MESSAGE response, int* error) {
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SOCK_RET err;
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int ret = 0;
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@ -144,7 +144,7 @@ Exit:
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return ret;
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}
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/* Terminate the RTSP Handshake process by closing the socket */
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// Terminate the RTSP Handshake process by closing the socket
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void terminateRtspHandshake(void) {
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if (sock != INVALID_SOCKET) {
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closesocket(sock);
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@ -152,7 +152,7 @@ void terminateRtspHandshake(void) {
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}
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}
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/* Send RTSP OPTIONS request */
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// Send RTSP OPTIONS request
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static int requestOptions(PRTSP_MESSAGE response, int* error) {
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RTSP_MESSAGE request;
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int ret;
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@ -168,7 +168,7 @@ static int requestOptions(PRTSP_MESSAGE response, int* error) {
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return ret;
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}
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/* Send RTSP DESCRIBE request */
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// Send RTSP DESCRIBE request
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static int requestDescribe(PRTSP_MESSAGE response, int* error) {
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RTSP_MESSAGE request;
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int ret;
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@ -192,7 +192,7 @@ static int requestDescribe(PRTSP_MESSAGE response, int* error) {
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return ret;
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}
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/* Send RTSP SETUP request */
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// Send RTSP SETUP request
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static int setupStream(PRTSP_MESSAGE response, char* target, int* error) {
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RTSP_MESSAGE request;
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int ret;
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@ -224,7 +224,7 @@ static int setupStream(PRTSP_MESSAGE response, char* target, int* error) {
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return ret;
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}
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/* Send RTSP PLAY request*/
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// Send RTSP PLAY request
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static int playStream(PRTSP_MESSAGE response, char* target, int* error) {
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RTSP_MESSAGE request;
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int ret;
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@ -245,7 +245,7 @@ static int playStream(PRTSP_MESSAGE response, char* target, int* error) {
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return ret;
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}
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/* Send RTSP ANNOUNCE message */
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// Send RTSP ANNOUNCE message
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static int sendVideoAnnounce(PRTSP_MESSAGE response, int* error) {
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RTSP_MESSAGE request;
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int ret;
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@ -284,7 +284,7 @@ static int sendVideoAnnounce(PRTSP_MESSAGE response, int* error) {
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return ret;
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}
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/* Perform RTSP Handshake with the streaming server machine as part of the connection process */
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// Perform RTSP Handshake with the streaming server machine as part of the connection process
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int performRtspHandshake(void) {
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char urlAddr[URLSAFESTRING_LEN];
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@ -1,8 +1,9 @@
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#include "Rtsp.h"
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/* Check if String s begins with the given prefix */
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static int startsWith(const char *s, const char *prefix) {
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if (strncmp(s, prefix, strlen(prefix)) == 0){
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// Check if String s begins with the given prefix
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static int startsWith(const char* s, const char* prefix) {
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if (strncmp(s, prefix, strlen(prefix)) == 0) {
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return 1;
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}
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else {
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@ -10,65 +11,67 @@ static int startsWith(const char *s, const char *prefix) {
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}
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}
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/* Gets the length of the message */
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static int getMessageLength(PRTSP_MESSAGE msg){
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// Gets the length of the message
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static int getMessageLength(PRTSP_MESSAGE msg) {
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POPTION_ITEM current;
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/* Initialize to 1 for null terminator */
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// Initialize to 1 for null terminator
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size_t count = 1;
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/* Add the length of the protocol */
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// Add the length of the protocol
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count += strlen(msg->protocol);
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/* Add length of request-specific strings */
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if (msg->type == TYPE_REQUEST){
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// Add length of request-specific strings
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if (msg->type == TYPE_REQUEST) {
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count += strlen(msg->message.request.command);
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count += strlen(msg->message.request.target);
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/* Add 4 for the two spaces and \r\n*/
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// Add 4 for the two spaces and \r\n
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count += 4;
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}
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/* Add length of response-specific strings */
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// Add length of response-specific strings
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else {
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char statusCodeStr[16];
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sprintf(statusCodeStr, "%d", msg->message.response.statusCode);
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count += strlen(statusCodeStr);
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count += strlen(msg->message.response.statusString);
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/* Add 4 for two spaces and \r\n */
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// Add 4 for two spaces and \r\n
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count += 4;
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}
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/* Count the size of the options */
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// Count the size of the options
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current = msg->options;
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while (current != NULL){
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while (current != NULL) {
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count += strlen(current->option);
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count += strlen(current->content);
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/* Add 4 because of :[space] and \r\n */
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// Add 4 because of :[space] and \r\n
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count += 4;
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current = current->next;
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}
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/* Add 2 more for extra /r/n ending */
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// Add 2 more for extra /r/n ending
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count += 2;
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/* Add the length of the payload, if any */
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count += msg->payloadLength;
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return (int)count;
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}
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/* Given an RTSP message string rtspMessage, parse it into an RTSP_MESSAGE struct msg */
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int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length) {
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char *token, *protocol, *endCheck, *target, *statusStr, *command, *sequence, flag;
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// Given an RTSP message string rtspMessage, parse it into an RTSP_MESSAGE struct msg
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int parseRtspMessage(PRTSP_MESSAGE msg, char* rtspMessage, int length) {
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char* token, *protocol, *endCheck, *target, *statusStr, *command, *sequence, flag;
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char messageEnded = 0, *payload = NULL, *opt = NULL;
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int statusCode = 0, sequenceNum, exitCode;
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POPTION_ITEM options = NULL;
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POPTION_ITEM newOpt;
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/* Delimeter sets for strtok() */
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char *delim = " \r\n";
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char *end = "\r\n";
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char *optDelim = " :\r\n";
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// Delimeter sets for strtok()
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char* delim = " \r\n";
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char* end = "\r\n";
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char* optDelim = " :\r\n";
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char typeFlag = TOKEN_OPTION;
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/* Put the raw message into a string we can use */
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char *messageBuffer = malloc(length + 1);
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// Put the raw message into a string we can use
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char* messageBuffer = malloc(length + 1);
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if (messageBuffer == NULL) {
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exitCode = RTSP_ERROR_NO_MEMORY;
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goto ExitFailure;
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@ -78,77 +81,74 @@ int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length) {
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// The payload logic depends on a null-terminator at the end
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messageBuffer[length] = 0;
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/* Get the first token of the message*/
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// Get the first token of the message
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token = strtok(messageBuffer, delim);
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if (token == NULL){
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if (token == NULL) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* The message is a response */
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if (startsWith(token, "RTSP")){
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// The message is a response
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if (startsWith(token, "RTSP")) {
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flag = TYPE_RESPONSE;
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/* The current token is the protocol */
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// The current token is the protocol
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protocol = token;
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/* Get the status code */
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// Get the status code
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token = strtok(NULL, delim);
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statusCode = atoi(token);
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if (token == NULL){
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if (token == NULL) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* Get the status string */
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// Get the status string
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statusStr = strtok(NULL, end);
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if (statusStr == NULL){
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if (statusStr == NULL) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* Request fields - we don't care about them here */
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// Request fields - we don't care about them here
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target = NULL;
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command = NULL;
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}
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/* The message is a request */
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// The message is a request
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else {
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flag = TYPE_REQUEST;
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/* The current token is the command */
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command = token;
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/* Get the target */
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target = strtok(NULL, delim);
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if (target == NULL){
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if (target == NULL) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* Get the protocol */
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protocol = strtok(NULL, delim);
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if (protocol == NULL){
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if (protocol == NULL) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* Response field - we don't care about it here */
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// Response field - we don't care about it here
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statusStr = NULL;
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}
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/* Check that the protocol is valid */
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if (strcmp(protocol, "RTSP/1.0")){
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if (strcmp(protocol, "RTSP/1.0")) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* Parse remaining options */
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while (token != NULL){
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// Parse remaining options
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while (token != NULL)
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{
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token = strtok(NULL, typeFlag == TOKEN_OPTION ? optDelim : end);
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if (token != NULL){
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if (token != NULL) {
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/* The token is an option */
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if (typeFlag == TOKEN_OPTION){
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if (typeFlag == TOKEN_OPTION) {
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opt = token;
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}
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/* The token is content */
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// The token is content
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else {
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/* Create a new node containing the option and content */
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// Create a new node containing the option and content
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newOpt = (POPTION_ITEM)malloc(sizeof(OPTION_ITEM));
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if (newOpt == NULL){
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if (newOpt == NULL) {
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freeOptionList(options);
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exitCode = RTSP_ERROR_NO_MEMORY;
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goto ExitFailure;
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@ -159,17 +159,17 @@ int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length) {
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newOpt->next = NULL;
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insertOption(&options, newOpt);
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/* Check if we're at the end of the message portion marked by \r\n\r\n
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* endCheck points to the remainder of messageBuffer after the token */
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// Check if we're at the end of the message portion marked by \r\n\r\n
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//endCheck points to the remainder of messageBuffer after the token
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endCheck = &token[0] + strlen(token) + 1;
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/* See if we've hit the end of the message. The first \r is missing because it's been tokenized */
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if (startsWith(endCheck, "\n\r\n")){
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// See if we've hit the end of the message. The first \r is missing because it's been tokenized
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if (startsWith(endCheck, "\n\r\n")) {
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/* We've encountered the end of the message - mark it thus */
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// We've encountered the end of the message - mark it thus
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messageEnded = 1;
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/* The payload is the remainder of messageBuffer. If none, then payload = null */
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// The payload is the remainder of messageBuffer. If none, then payload = null
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if (endCheck[3] != '\0')
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payload = &endCheck[3];
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@ -179,13 +179,13 @@ int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length) {
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}
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typeFlag ^= 1; // flip the flag
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}
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/* If we never encountered the double CRLF, then the message is malformed! */
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if (!messageEnded){
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// If we never encountered the double CRLF, then the message is malformed!
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if (!messageEnded) {
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exitCode = RTSP_ERROR_MALFORMED;
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goto ExitFailure;
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}
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/* Get sequence number as an integer */
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// Get sequence number as an integer
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sequence = getOptionContent(options, "CSeq");
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if (sequence != NULL) {
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sequenceNum = atoi(sequence);
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@ -193,8 +193,8 @@ int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length) {
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else {
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sequenceNum = SEQ_INVALID;
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}
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/* Package the new parsed message into the struct */
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if (flag == TYPE_REQUEST){
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// Package the new parsed message into the struct
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if (flag == TYPE_REQUEST) {
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createRtspRequest(msg, messageBuffer, FLAG_ALLOCATED_MESSAGE_BUFFER | FLAG_ALLOCATED_OPTION_ITEMS, command, target,
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protocol, sequenceNum, options, payload, payload ? length - (int)(messageBuffer - payload) : 0);
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}
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@ -204,7 +204,6 @@ int parseRtspMessage(PRTSP_MESSAGE msg, char *rtspMessage, int length) {
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}
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return RTSP_ERROR_SUCCESS;
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/* Cleanup in failure condition */
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ExitFailure:
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if (options) {
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free(options);
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@ -215,9 +214,9 @@ ExitFailure:
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return exitCode;
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}
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/* Create new RTSP message struct with response data */
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void createRtspResponse(PRTSP_MESSAGE msg, char *message, int flags, char *protocol,
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int statusCode, char *statusString, int sequenceNumber, POPTION_ITEM optionsHead, char *payload, int payloadLength) {
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// Create new RTSP message struct with response data
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void createRtspResponse(PRTSP_MESSAGE msg, char* message, int flags, char* protocol,
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int statusCode, char* statusString, int sequenceNumber, POPTION_ITEM optionsHead, char* payload, int payloadLength) {
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msg->type = TYPE_RESPONSE;
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msg->flags = flags;
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msg->messageBuffer = message;
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@ -230,9 +229,9 @@ void createRtspResponse(PRTSP_MESSAGE msg, char *message, int flags, char *proto
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msg->message.response.statusCode = statusCode;
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}
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/* Create new RTSP message struct with request data */
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void createRtspRequest(PRTSP_MESSAGE msg, char *message, int flags,
|
||||
char *command, char *target, char *protocol, int sequenceNumber, POPTION_ITEM optionsHead, char *payload, int payloadLength) {
|
||||
// Create new RTSP message struct with request data
|
||||
void createRtspRequest(PRTSP_MESSAGE msg, char* message, int flags,
|
||||
char* command, char* target, char* protocol, int sequenceNumber, POPTION_ITEM optionsHead, char* payload, int payloadLength) {
|
||||
msg->type = TYPE_REQUEST;
|
||||
msg->flags = flags;
|
||||
msg->protocol = protocol;
|
||||
@ -245,38 +244,39 @@ void createRtspRequest(PRTSP_MESSAGE msg, char *message, int flags,
|
||||
msg->message.request.target = target;
|
||||
}
|
||||
|
||||
/* Retrieves option content from the linked list given the option title */
|
||||
char *getOptionContent(POPTION_ITEM optionsHead, char *option){
|
||||
// Retrieves option content from the linked list given the option title
|
||||
char* getOptionContent(POPTION_ITEM optionsHead, char* option) {
|
||||
OPTION_ITEM *current = optionsHead;
|
||||
while (current != NULL){
|
||||
/* Check if current node is what we're looking for */
|
||||
if (!strcmp(current->option, option)){
|
||||
while (current != NULL) {
|
||||
// Check if current node is what we're looking for
|
||||
if (!strcmp(current->option, option)) {
|
||||
return current->content;
|
||||
}
|
||||
current = current->next;
|
||||
}
|
||||
/* Not found */
|
||||
// Not found
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Adds new option opt to the struct's option list */
|
||||
void insertOption(POPTION_ITEM *optionsHead, POPTION_ITEM opt){
|
||||
// Adds new option opt to the struct's option list
|
||||
void insertOption(POPTION_ITEM *optionsHead, POPTION_ITEM opt) {
|
||||
OPTION_ITEM *current = *optionsHead;
|
||||
opt->next = NULL;
|
||||
|
||||
/* Empty options list */
|
||||
if (*optionsHead == NULL){
|
||||
// Empty options list
|
||||
if (*optionsHead == NULL) {
|
||||
*optionsHead = opt;
|
||||
return;
|
||||
}
|
||||
/* Traverse the list and insert the new option at the end */
|
||||
while (current != NULL){
|
||||
/* Check for duplicate option; if so, replace the option currently there */
|
||||
if (!strcmp(current->option, opt->option)){
|
||||
|
||||
// Traverse the list and insert the new option at the end
|
||||
while (current != NULL) {
|
||||
// Check for duplicate option; if so, replace the option currently there
|
||||
if (!strcmp(current->option, opt->option)) {
|
||||
current->content = opt->content;
|
||||
return;
|
||||
}
|
||||
if (current->next == NULL){
|
||||
if (current->next == NULL) {
|
||||
current->next = opt;
|
||||
return;
|
||||
}
|
||||
@ -284,14 +284,14 @@ void insertOption(POPTION_ITEM *optionsHead, POPTION_ITEM opt){
|
||||
}
|
||||
}
|
||||
|
||||
/* Free every node in the message's option list */
|
||||
void freeOptionList(POPTION_ITEM optionsHead){
|
||||
// Free every node in the message's option list
|
||||
void freeOptionList(POPTION_ITEM optionsHead) {
|
||||
POPTION_ITEM current = optionsHead;
|
||||
POPTION_ITEM temp;
|
||||
while (current != NULL){
|
||||
while (current != NULL) {
|
||||
temp = current;
|
||||
current = current->next;
|
||||
if (temp->flags & FLAG_ALLOCATED_OPTION_FIELDS){
|
||||
if (temp->flags & FLAG_ALLOCATED_OPTION_FIELDS) {
|
||||
free(temp->option);
|
||||
free(temp->content);
|
||||
}
|
||||
@ -299,10 +299,10 @@ void freeOptionList(POPTION_ITEM optionsHead){
|
||||
}
|
||||
}
|
||||
|
||||
/* Serialize the message struct into a string containing the RTSP message */
|
||||
char *serializeRtspMessage(PRTSP_MESSAGE msg, int *serializedLength){
|
||||
// Serialize the message struct into a string containing the RTSP message
|
||||
char* serializeRtspMessage(PRTSP_MESSAGE msg, int *serializedLength) {
|
||||
int size = getMessageLength(msg);
|
||||
char *serializedMessage;
|
||||
char* serializedMessage;
|
||||
POPTION_ITEM current = msg->options;
|
||||
char statusCodeStr[16];
|
||||
|
||||
@ -311,41 +311,41 @@ char *serializeRtspMessage(PRTSP_MESSAGE msg, int *serializedLength){
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (msg->type == TYPE_REQUEST){
|
||||
/* command [space] */
|
||||
if (msg->type == TYPE_REQUEST) {
|
||||
// command [space]
|
||||
strcpy(serializedMessage, msg->message.request.command);
|
||||
strcat(serializedMessage, " ");
|
||||
/* target [space] */
|
||||
// target [space]
|
||||
strcat(serializedMessage, msg->message.request.target);
|
||||
strcat(serializedMessage, " ");
|
||||
/* protocol \r\n */
|
||||
// protocol \r\n
|
||||
strcat(serializedMessage, msg->protocol);
|
||||
strcat(serializedMessage, "\r\n");
|
||||
}
|
||||
else {
|
||||
/* protocol [space] */
|
||||
// protocol [space]
|
||||
strcpy(serializedMessage, msg->protocol);
|
||||
strcat(serializedMessage, " ");
|
||||
/* status code [space] */
|
||||
// status code [space]
|
||||
sprintf(statusCodeStr, "%d", msg->message.response.statusCode);
|
||||
strcat(serializedMessage, statusCodeStr);
|
||||
strcat(serializedMessage, " ");
|
||||
/* status str\r\n */
|
||||
// status str\r\n
|
||||
strcat(serializedMessage, msg->message.response.statusString);
|
||||
strcat(serializedMessage, "\r\n");
|
||||
}
|
||||
/* option content\r\n */
|
||||
while (current != NULL){
|
||||
// option content\r\n
|
||||
while (current != NULL) {
|
||||
strcat(serializedMessage, current->option);
|
||||
strcat(serializedMessage, ": ");
|
||||
strcat(serializedMessage, current->content);
|
||||
strcat(serializedMessage, "\r\n");
|
||||
current = current->next;
|
||||
}
|
||||
/* Final \r\n */
|
||||
// Final \r\n
|
||||
strcat(serializedMessage, "\r\n");
|
||||
|
||||
/* payload */
|
||||
// payload
|
||||
if (msg->payload != NULL) {
|
||||
int offset;
|
||||
|
||||
@ -364,19 +364,19 @@ char *serializeRtspMessage(PRTSP_MESSAGE msg, int *serializedLength){
|
||||
return serializedMessage;
|
||||
}
|
||||
|
||||
/* Free everything in a msg struct */
|
||||
void freeMessage(PRTSP_MESSAGE msg){
|
||||
/* If we've allocated the message buffer */
|
||||
if (msg->flags & FLAG_ALLOCATED_MESSAGE_BUFFER){
|
||||
// Free everything in a msg struct
|
||||
void freeMessage(PRTSP_MESSAGE msg) {
|
||||
// If we've allocated the message buffer
|
||||
if (msg->flags & FLAG_ALLOCATED_MESSAGE_BUFFER) {
|
||||
free(msg->messageBuffer);
|
||||
}
|
||||
|
||||
/* If we've allocated any option items */
|
||||
if (msg->flags & FLAG_ALLOCATED_OPTION_ITEMS){
|
||||
// If we've allocated any option items
|
||||
if (msg->flags & FLAG_ALLOCATED_OPTION_ITEMS) {
|
||||
freeOptionList(msg->options);
|
||||
}
|
||||
|
||||
/* If we've allocated the payload */
|
||||
// If we've allocated the payload
|
||||
if (msg->flags & FLAG_ALLOCATED_PAYLOAD) {
|
||||
free(msg->payload);
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user