26 | | n = recv(socket,buffer,256,MSG_PEEK); |
27 | | for(i=0;i<256;i++){ |
28 | | if(strcmp(&buffer[i],"\0") == 0) break; |
| 24 | void |
| 25 | ReadMessage(int32_t socketFD, char* msgBuffer) |
| 26 | { |
| 27 | ssize_t msgLength; |
| 28 | |
| 29 | msgLength = recv(socketFD, msgBuffer, 256, MSG_PEEK); |
| 30 | for(size_t i = 0; i < 256; i++) { |
| 31 | if(strcmp(&msgBuffer[i], "\0") == 0) |
| 32 | break; |
30 | | n = recv(socket,buffer,i+1,0); |
31 | | if (n < 0) |
32 | | error("ERROR reading from socket"); |
33 | | //printf("ReadMessage:%s %d\n",buffer,n); |
| 34 | |
| 35 | msgLength = recv(socketFD, msgBuffer, i + 1, 0); |
| 36 | if (msgLength < 0) |
| 37 | ERROR(1, "Error reading from socket"); |
44 | | // server name |
45 | | server = gethostbyname(argv[1]); |
46 | | if (server == NULL) { |
47 | | fprintf(stderr,"ERROR, no such host\n"); |
48 | | exit(0); |
49 | | } |
50 | | // port no. |
51 | | portno = atoi(argv[2]); |
52 | | // socket file descriptor |
53 | | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
54 | | if (sockfd < 0) |
55 | | error("ERROR opening socket"); |
56 | | // initiate struct socketaddr_in |
57 | | bzero((char *) &serv_addr, sizeof(serv_addr)); |
| 50 | server = gethostbyname(serverName); |
| 51 | if(server == NULL) |
| 52 | ERROR(1, "No server found by that hostname."); |
| 53 | |
| 54 | portNo = atoi(portNumber); |
| 55 | |
| 56 | socketFD = socket(AF_INET, SOCK_STREAM, 0); |
| 57 | if(socketFD < 0) |
| 58 | ERROR(1, "Error opening socket"); |
| 59 | |
| 60 | memset((void *) &serv_addr, 0, sizeof(serv_addr)); |
59 | | serv_addr.sin_port = htons(portno); |
60 | | bcopy((char *)server->h_addr, |
61 | | (char *)&serv_addr.sin_addr.s_addr, |
62 | | server->h_length); |
63 | | // cast sockaddr_in to sockaddr |
64 | | if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0) |
65 | | error("ERROR connecting"); |
| 62 | serv_addr.sin_port = htons(portNo); |
| 63 | memcpy((char *) &serv_addr.sin_addr.s_addr, (char *) server->h_addr, \ |
| 64 | server->h_length); |
76 | | n = send(socketfd,message,(strlen(message)+1),0); |
77 | | if (n<0) |
78 | | error("Error sending to server\n"); |
79 | | else if(n == 0) |
80 | | printf("Server closed the socket.\n"); |
| 80 | |
| 81 | ssize_t numSentBytes = send(socketFD, message, (strlen(message) + 1), 0); |
| 82 | if(numSentBytes < 0) |
| 83 | ERROR("Error sending to server."); |
| 84 | else if(numSentBytes == 0) |
| 85 | LOG("socket_comm::SendMessage - Server closed the socket.\n"); |
82 | | return n; |
83 | | } |
84 | | |
85 | | int GetParameter(int sockfd, struct Parameter pList[], struct CE_Info *ce_info) |
86 | | { |
87 | | char buffer[256]; |
88 | | int i; |
89 | | |
90 | | // numParameters |
91 | | bzero(buffer,256); |
92 | | ReadMessage(sockfd,buffer); |
93 | | ce_info->numParameters = atoi(buffer); |
94 | | printf("number of parameters: %d\n", ce_info->numParameters); |
95 | | |
96 | | for (i = 0; i < ce_info->numParameters; i++){ |
97 | | bzero(buffer,256); |
98 | | ReadMessage(sockfd,buffer); |
99 | | printf("Name: %s\n", buffer); |
100 | | pList[i].name = std::string(buffer); |
101 | | // strcpy(pList[i].name.c_str(), buffer); |
102 | | |
103 | | bzero(buffer,256); |
104 | | ReadMessage(sockfd,buffer); |
105 | | printf("Units: %s\n", buffer); |
106 | | pList[i].units = std::string(buffer); |
107 | | // strcpy(pList[i].units.c_str(), buffer); |
108 | | |
109 | | bzero(buffer,256); |
110 | | ReadMessage(sockfd,buffer); |
111 | | printf("Min: %s\n", buffer); |
112 | | pList[i].min = atof(buffer); |
113 | | |
114 | | bzero(buffer,256); |
115 | | ReadMessage(sockfd,buffer); |
116 | | printf("Max: %s\n", buffer); |
117 | | pList[i].max = atof(buffer); |
118 | | |
119 | | bzero(buffer,256); |
120 | | ReadMessage(sockfd,buffer); |
121 | | printf("Step: %s\n", buffer); |
122 | | pList[i].step = atof(buffer); |
123 | | |
124 | | bzero(buffer,256); |
125 | | ReadMessage(sockfd,buffer); |
126 | | printf("Value: %s\n", buffer); |
127 | | pList[i].value = atof(buffer); |
128 | | |
129 | | } |
130 | | return 1; |
| 87 | return numSentBytes; |
143 | | if(strcmp(buffer,"val") != 0) { |
144 | | printf("Policy Engine:: Unexpected control data received.\n\n"); |
145 | | return 0; |
| 101 | ReadMessage(socketFD, buffer); |
| 102 | ce_info->numParameters = atoi(buffer); |
| 103 | LOG("socket_comm::GetParameter - Number of parameters: %d\n", \ |
| 104 | ce_info->numParameters); |
| 105 | |
| 106 | for(size_t i = 0; i < ce_info->numParameters; i++) { |
| 107 | memset(buffer, 0, 256); |
| 108 | ReadMessage(socketFD, buffer); |
| 109 | LOG("socket_comm::GetParameter - Name: %s\n", buffer); |
| 110 | pList[i].name = std::string(buffer); |
| 111 | |
| 112 | memset(buffer, 0, 256); |
| 113 | ReadMessage(socketFD, buffer); |
| 114 | LOG("socket_comm::GetParameter - Units: %s\n", buffer); |
| 115 | pList[i].units = std::string(buffer); |
| 116 | |
| 117 | memset(buffer, 0, 256); |
| 118 | ReadMessage(socketFD, buffer); |
| 119 | LOG("socket_comm::GetParameter - Min: %s\n", buffer); |
| 120 | pList[i].min = atof(buffer); |
| 121 | |
| 122 | memset(buffer, 0, 256); |
| 123 | ReadMessage(socketFD, buffer); |
| 124 | LOG("socket_comm::GetParameter - Max: %s\n", buffer); |
| 125 | pList[i].max = atof(buffer); |
| 126 | |
| 127 | memset(buffer, 0, 256); |
| 128 | ReadMessage(socketFD, buffer); |
| 129 | LOG("socket_comm::GetParameter - Step: %s\n", buffer); |
| 130 | pList[i].step = atof(buffer); |
| 131 | |
| 132 | memset(buffer, 0, 256); |
| 133 | ReadMessage(socketFD, buffer); |
| 134 | LOG("socket_comm::GetParameter - Value: %s\n", buffer); |
| 135 | pList[i].value = atof(buffer); |
| 142 | // TODO if we are just returing fail/success here, then why not return a bool |
| 143 | // instead of an entire 32 bit integer? Seems wasteful. |
| 144 | int32_t |
| 145 | GetRequest(int32_t socketFD, struct Parameter pList[], struct CE_Info *ce_info) |
| 146 | { |
| 147 | char buffer[256]; |
| 148 | memset(buffer, 0, 256); |
| 149 | |
| 150 | ReadMessage(socketFD, buffer); |
| 151 | |
| 152 | if(strcmp(buffer, "val") != 0) { |
| 153 | LOG("socket_comm::GetRequest - Unexpected control data received.\n\n"); |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | LOG("socket_comm::GetRequest - Getting parameters.\n\n"); |
| 158 | GetParameter(socketFD, pList, ce_info); |
| 159 | |
| 160 | return 1; |
| 161 | } |
| 162 | |
| 163 | |