89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/prov_ssl.h>
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#include <openssl/ssl.h>
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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 <unistd.h>
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#define PORT 8080
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#define BUFFER_SIZE 1024
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int main(void) {
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// http server
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char buffer[BUFFER_SIZE];
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char resp[] = "HTTP/1.0 200 OK\r\n"
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"Server: webserver-c\r\n"
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"Content-type: text/html\r\n\r\n"
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"<html>hello, world</html>\r\n";
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// create socket
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int sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd == -1){
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perror("webserver (socket)");
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return 1;
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}
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printf("socket created succesfully\n");
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// bind to port and address
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struct sockaddr_in host_addr;
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socklen_t host_addr_len = sizeof(host_addr);
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host_addr.sin_family = AF_INET;
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host_addr.sin_port = htons(PORT);
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host_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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if(bind(sockfd, (struct sockaddr*)&host_addr, host_addr_len) != 0){
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perror("webserver (bind)");
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return 1;
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}
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printf("socket succesfully bound to address\n");
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// create client address
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struct sockaddr_in client_addr;
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int client_addr_len = sizeof(host_addr);
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// accept connections
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while (1) {
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int newsockfd = accept(sockfd, (struct sockaddr*) &host_addr, (socklen_t *) &host_addr_len);
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if (newsockfd < 0){
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perror("webserver (accept)");
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return 1;
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}
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printf("connection accepted\n");
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// get client addr
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int sockn = getsockname(newsockfd, (struct sockaddr*) &client_addr, (socklen_t *) &client_addr_len);
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if (sockn < 0){
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perror("webserver (getsockname)");
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return 1;
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}
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// read from socket
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ssize_t valread = read(newsockfd, buffer, BUFFER_SIZE);
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if (valread < 0){
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perror("webserver (read)");
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}
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// read the request
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char method[BUFFER_SIZE], uri[BUFFER_SIZE], version[BUFFER_SIZE];
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sscanf(buffer, "%s %s %s", method, uri, version);
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printf("[%s:%u] %s %s %s\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port), method, version, uri);
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// write to the socket
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ssize_t valwrite = write(newsockfd, resp, strlen(resp));
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if (valwrite < 0){
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perror("webserver (write)");
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}
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close(newsockfd);
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}
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return 0;
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}
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