74 lines
1.2 KiB
C
74 lines
1.2 KiB
C
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <string.h>
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int main(){
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int s = 0;
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if((s = socket(AF_INET, SOCK_STREAM, 0)) < 0){
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perror("socket error");
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}
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struct sockaddr_in s_addr;
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int opt = 1;
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt));
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s_addr.sin_family = AF_INET;
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s_addr.sin_port = htons(8080);
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s_addr.sin_addr.s_addr = INADDR_ANY;
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if( bind(s, (struct sockaddr *)&s_addr, sizeof(s_addr)) < 0){
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perror("bind error");
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exit(1);
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}
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while(1){
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if(listen(s, 3) < 0){
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perror("listen error");
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}
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int c_sock = 0;
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int addrlen = sizeof(s_addr);
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if((c_sock = accept(s, (struct sockaddr *)&s_addr, (socklen_t*)&addrlen)) < 0 ){
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perror("accept error");
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exit(-1);
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}
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char temp[256];
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recv(c_sock, &temp, 256, 0);
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int num_1 = atoi(temp);
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recv(c_sock, &temp, 256, 0);
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int num_2 = atoi(temp);
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recv(c_sock, &temp, 256, 0);
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int num_3 = atoi(temp);
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char *response;
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if((num_1+num_2) == num_3){
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response = "correct";
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}
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else{
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response = "incorrect";
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num_3 = num_1+num_2;
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sprintf(temp, "%d", num_3);
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}
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send(c_sock, response, 256, 0);
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send(c_sock, temp, 256, 0);
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}
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close(s);
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return 0;
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}
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