root / logic / trunk / src / hci_comm / hci_comm_listener.c @ 93
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/*
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* hci_comm_listener.c
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*
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* 2011, Aleksander Besir (alex.besir@gmail.com)
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*
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*/
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#include "hci_comm.h" |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "../mxml/mxml.h" |
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#include "hciChanged.h" |
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// Global variables from startup/main.c
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extern pthread_mutex_t mtx;
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extern int hciChanged; |
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int listenTo(unsigned short int portNum) { |
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// Holders
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char *attrVal;
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char *name;
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int responseLength;
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// Buffer
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char *requestBuffer = malloc(HCI_COMM_REQUEST_BUFFER_SIZE * sizeof(char)); |
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if(requestBuffer == NULL) { |
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printf("HCI comm error: Cannot allocate buffer.\n");
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return HCI_COMM_ERR_BUF_ALOC_FAIL;
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} |
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char *responseBuffer = malloc(HCI_COMM_RESPONSE_BUFFER_SIZE * sizeof(char)); |
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if(responseBuffer == NULL) { |
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printf("HCI comm error: Cannot allocate buffer.\n");
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return HCI_COMM_ERR_BUF_ALOC_FAIL;
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} |
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char *lineBuffer = malloc(HCI_COMM_LINE_BUFFER_SIZE * sizeof(char)); |
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if(lineBuffer == NULL) { |
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printf("HCI comm error: Cannot allocate buffer.\n");
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return HCI_COMM_ERR_BUF_ALOC_FAIL;
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} |
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// Socket holder
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int socketHolder = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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if(socketHolder < 0) { |
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fprintf(stderr,"HCI comm error: Cannot create a new socket.\n");
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return HCI_COMM_ERR_NEW_SOCKET_FAIL;
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} |
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// Socket address holder
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struct sockaddr_in socketAddressHolder;
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memset(&socketAddressHolder, 0, sizeof(socketAddressHolder)); |
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socketAddressHolder.sin_family = AF_INET; |
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socketAddressHolder.sin_port = htons(portNum); |
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socketAddressHolder.sin_addr.s_addr = INADDR_ANY; |
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// Bind socket to port
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int bindingResult = bind(socketHolder,(struct sockaddr *)&socketAddressHolder, sizeof(socketAddressHolder)); |
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if(bindingResult == -1) { |
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fprintf(stderr,"HCI comm error: Cannot bind socket to port %d.\n",portNum);
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close(socketHolder); |
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return HCI_COMM_ERR_BIND_FAIL;
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} |
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// Listen to port
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int listenResult = listen(socketHolder, 10); |
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if(listenResult == -1) { |
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printf("HCI comm error: Cannot listen to port %d.\n",portNum);
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close(socketHolder); |
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return HCI_COMM_ERR_LISTEN_FAIL;
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} |
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// Infinite listening
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while(1) { |
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memset(responseBuffer,'\0',HCI_COMM_RESPONSE_BUFFER_SIZE);
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memset(requestBuffer,'\0',HCI_COMM_REQUEST_BUFFER_SIZE);
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memset(lineBuffer,'\0',HCI_COMM_LINE_BUFFER_SIZE);
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responseLength = 0;
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printf("[hci_comm_listener] Waiting for new connection...\n");
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// Accept request
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int connectionHolder = accept(socketHolder,NULL,NULL); |
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if(connectionHolder < 0) { |
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printf("HCI comm error: Error accepting request.\n");
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shutdown(connectionHolder,SHUT_RDWR); |
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close(connectionHolder); |
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continue;
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} |
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printf("[hci_comm_listener] New connection accepted\n");
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// Read request
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int readResult = read(connectionHolder,requestBuffer,HCI_COMM_REQUEST_BUFFER_SIZE);
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printf("[hci_comm_listener] Recieved request: %s \n",requestBuffer);
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if(readResult < 0) { |
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printf("HCI comm error: Error reading request.\n");
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strcpy(responseBuffer,"<logic-response type=\"error\">Could not read request!</logic-response>");
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responseLength = strlen(responseBuffer); |
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write(connectionHolder,responseBuffer,responseLength); |
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shutdown(connectionHolder,SHUT_RDWR); |
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close(connectionHolder); |
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continue;
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} |
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// Parse request
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mxml_node_t *tree; |
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tree = mxmlLoadString(NULL, requestBuffer, MXML_NO_CALLBACK);
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if(tree == NULL) { |
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printf("[hci_comm_listener] Error parsing request!\n");
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strcpy(responseBuffer,"<logic-response type=\"error\">Could not parse request!</logic-response>");
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responseLength = strlen(responseBuffer); |
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write(connectionHolder,responseBuffer,responseLength); |
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shutdown(connectionHolder,SHUT_RDWR); |
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close(connectionHolder); |
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continue;
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} |
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printf("[hci_comm_listener] Request parsed\n");
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// Create a response
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printf("[hci_comm_listener] Creating response\n");
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mxml_node_t *node; |
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node = mxmlFindElement(tree, tree, "hci-request", NULL, NULL, MXML_DESCEND); |
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if(node == NULL) { |
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printf("[hci_comm_listener] Request invalid! Sending error to client\n");
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strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
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responseLength = strlen(responseBuffer); |
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write(connectionHolder,responseBuffer,responseLength); |
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shutdown(connectionHolder,SHUT_RDWR); |
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close(connectionHolder); |
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continue;
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} |
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printf("[hci_comm_listener] Main request node found\n");
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printf("[hci_comm_listener] %d\n",node);
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attrVal = (char *)malloc(sizeof(node->value.element.attrs->value)*strlen(mxmlElementGetAttr(node, "type"))); |
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attrVal = mxmlElementGetAttr(node,"type");
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printf("[hci_comm_listener] Got type\n");
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if(strcmp(attrVal,"checkConnection") == 0) { |
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printf("[hci_comm_listener] checkConnection request\n");
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strcpy(responseBuffer,"");
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strcat(responseBuffer,"<logic-response type=\"checkConnection\"><data>");
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mxml_node_t *child = node->child; |
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child = child->child; |
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strcat(responseBuffer,child->value.text.string); |
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strcat(responseBuffer,"</data></logic-response>");
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printf("[hci_comm_listener] Response formed: %s\n",responseBuffer);
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responseLength = strlen(responseBuffer); |
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printf("[hci_comm_listener] Response length formed: %d\n",responseLength);
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} else if(strcmp(attrVal,"getConfig") == 0) { |
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printf("[hci_comm_listener] getConfig request\n");
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// TODO
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} else if(strcmp(attrVal,"setConfig") == 0) { |
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printf("[hci_comm_listener] setConfig request\n");
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// TODO
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} else if(strcmp(attrVal,"getScenarios") == 0) { |
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printf("[hci_comm_listener] getScenarios request\n");
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FILE *fp; |
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if(fp = fopen("./scenariotree.xml", "r")) { |
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printf("[hci_comm_listener] File opened\n");
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strcat(responseBuffer,"<logic-response type=\"getScenarios\">");
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while(fgets(lineBuffer,HCI_COMM_LINE_BUFFER_SIZE,fp)) {
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strcat(responseBuffer,lineBuffer); |
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} |
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strcat(responseBuffer,"</logic-response>");
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responseLength = strlen(responseBuffer); |
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fclose(fp); |
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} else {
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printf("[hci_comm_listener] Error: Can't open file scenariotree.xml\n");
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strcpy(responseBuffer,"<logic-response type=\"error\">Could not read file!</logic-response>");
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responseLength = strlen(responseBuffer); |
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} |
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} else if(strcmp(attrVal,"setScenarios") == 0) { |
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printf("[hci_comm_listener] setScenarios request\n");
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// Prepare new content for scenariotree.xml
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strncpy(lineBuffer,requestBuffer+54,strlen(requestBuffer)-(54+14+2)); |
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strcpy(requestBuffer,"<?xml version=\"1.0\"?>");
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strcat(requestBuffer,lineBuffer); |
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FILE *fp; |
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if(fp = fopen("./scenariotree.xml", "w")) { |
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fputs(requestBuffer,fp); |
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fclose(fp); |
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pthread_mutex_lock(&mtx); |
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hciChanged = HCI_CHANGED_SCENARIOS; |
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pthread_mutex_unlock(&mtx); |
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strcpy(responseBuffer,"<logic-response type=\"setScenarios\"></logic-response>");
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responseLength = strlen(responseBuffer); |
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} else {
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printf("[hci_comm_listener] Error: Can't open file scenariotree.xml for writing\n");
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strcpy(responseBuffer,"<logic-response type=\"error\">Could not write file!</logic-response>");
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responseLength = strlen(responseBuffer); |
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} |
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} else if(strcmp(attrVal,"executeAction") == 0) { |
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printf("[hci_comm_listener] executeAction request\n");
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// TODO
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} else {
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strcpy(responseBuffer,"<logic-response type=\"error\">Invalid request!</logic-response>");
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responseLength = 62;
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} |
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// Check if logic wants to terminate the infinite loop
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if(responseLength == HCI_COMM_TERMINATE) {
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break;
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} |
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// Send response
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int writeResult = write(connectionHolder,responseBuffer,responseLength);
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printf("[hci_comm_listener] Written response to client\n");
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if(writeResult < 0) { |
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printf("HCI comm error: Error writting response.\n");
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} |
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// Close connection
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free(attrVal); |
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shutdown(connectionHolder,SHUT_RDWR); |
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close(connectionHolder); |
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printf("[hci_comm_listener] Connection closed\n");
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} |
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// Terminate
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close(socketHolder); |
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free(requestBuffer); |
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requestBuffer = NULL;
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return HCI_COMM_TERMINATED_BY_LOGIC;
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} |