Joseph Henry
10 years ago
6 changed files with 202 additions and 60 deletions
@ -0,0 +1,60 @@
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// TCP Client test program
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#include <stdio.h> |
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#include <string.h> |
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#include <sys/socket.h> |
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#include <arpa/inet.h> |
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#include <unistd.h> |
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int atoi(const char *str); |
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int close(int filedes); |
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#define MSG_SZ 128 |
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int main(int argc , char *argv[]) |
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{ |
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if(argc < 3) { |
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printf("usage: client <addr> <port>\n"); |
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return 1; |
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} |
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int sock, port = atoi(argv[2]); |
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struct sockaddr_in server; |
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char message[MSG_SZ] , server_reply[MSG_SZ]; |
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sock = socket(AF_INET , SOCK_STREAM , 0); |
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if (sock == -1) { |
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printf("could not create socket"); |
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}
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server.sin_addr.s_addr = inet_addr(argv[1]); |
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server.sin_family = AF_INET; |
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server.sin_port = htons( port ); |
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printf("connecting...\n"); |
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if (connect(sock , (struct sockaddr *)&server , sizeof(server)) < 0) { |
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perror("connect failed. Error"); |
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return 1; |
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} |
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printf("\n\n\nconnected\n"); |
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char *msg = "welcome to the machine!"; |
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// TX
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if(send(sock, msg, strlen(msg), 0) < 0) { |
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printf("send failed"); |
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return 1; |
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} |
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else { |
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printf("TX: %s\n", msg); |
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printf("len = %ld\n", strlen(msg)); |
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int bytes_read = read(sock, server_reply, MSG_SZ); |
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if(bytes_read < 0) |
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printf("\tRX: Nothing\n"); |
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else |
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printf("\tRX = (%d bytes): %s\n", bytes_read, server_reply); |
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} |
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close(sock); |
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return 0; |
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} |
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@ -0,0 +1,66 @@
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// TCP Server test program
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#include <stdio.h> |
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#include <string.h> |
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#include <sys/socket.h> |
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#include <arpa/inet.h> |
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#include <unistd.h> |
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int atoi(const char *str); |
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int main(int argc , char *argv[]) |
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{ |
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if(argc < 2) { |
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printf("usage: tcp_server <port>\n"); |
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return 0; |
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} |
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int sock, client_sock, c, read_size, port = atoi(argv[1]); |
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char client_message[2000]; |
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char str[100]; |
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int comm_fd; |
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struct sockaddr_in servaddr; |
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struct sockaddr_in client; |
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sock = socket(AF_INET, SOCK_STREAM, 0);
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bzero( &servaddr, sizeof(servaddr)); |
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servaddr.sin_family = AF_INET; |
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servaddr.sin_addr.s_addr = htons(INADDR_ANY); |
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servaddr.sin_port = htons(port); |
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bind(sock, (struct sockaddr *) &servaddr, sizeof(servaddr)); |
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printf("listening\n"); |
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listen(sock , 3);
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printf("waiting to accept\n"); |
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c = sizeof(struct sockaddr_in); |
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while(1) |
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{ |
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client_sock = accept(sock, (struct sockaddr *)&client, (socklen_t*)&c); |
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if (client_sock < 0) { |
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perror("accept failed"); |
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return 0; |
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} |
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printf("\n\n\nconnection accepted\n reading...\n"); |
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// RX
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int msglen = 1024; |
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unsigned long count = 0; |
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int bytes_read = read(client_sock, client_message, msglen); |
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printf("[%lu] RX = (%d): ", count, bytes_read); |
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for(int i=0; i<bytes_read; i++) { |
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printf("%c", client_message[i]); |
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} |
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// TX
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int bytes_written = write(client_sock, "Server here!", 12);
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printf("\t\nTX = %d\n", bytes_written);
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} |
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return 0; |
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} |
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