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Simple IPv4 TCP server in C
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| #include <stdio.h> | |
| /* atoi() */ | |
| #include <stdlib.h> | |
| /* close() */ | |
| #include <unistd.h> | |
| /* sockaddr_in */ | |
| #include <arpa/inet.h> | |
| #define UNUSED(x) (void)x | |
| int main(int argc, char **argv) | |
| { | |
| if(argc != 3) { | |
| puts("invalid num of args"); | |
| return 1; | |
| } | |
| struct sockaddr_in addr; | |
| addr.sin_family = AF_INET; | |
| addr.sin_addr.s_addr = inet_addr(argv[1]); | |
| addr.sin_port = htons(atoi(argv[2])); | |
| int sock = socket(AF_INET, SOCK_STREAM, 0); | |
| if(bind(sock, (const struct sockaddr*)&addr, sizeof addr) != 0) { | |
| puts("bind failed"); | |
| return 1; | |
| } | |
| listen(sock, 0); | |
| for(;;) { | |
| int conn = accept(sock, NULL, NULL); | |
| dprintf(conn, "hello world\n"); | |
| close(conn); | |
| } | |
| return 0; | |
| } |
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