mirror of
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202 lines
5.3 KiB
C
202 lines
5.3 KiB
C
/**
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* test server for packet parsing & rendering
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*
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* based on selectserver.c from http://beej.us/guide/bgnet/
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* "The C source code presented in this document is hereby granted to the public domain, and is completely free of any license restriction."
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#define __USE_POSIX
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#include <netdb.h>
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#include "test.h"
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// cmd line args
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extern uint8_t verbose, stats;
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// get sockaddr, IPv4 or IPv6:
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void *get_in_addr (struct sockaddr *sa) {
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if (sa->sa_family == AF_INET)
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return &(((struct sockaddr_in*)sa)->sin_addr);
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return &(((struct sockaddr_in6*)sa)->sin6_addr);
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}
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void test_file(const char* filename, size_t recv_buf_size) {
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char buf[CONT_BUF_SIZE + RECV_BUF_SIZE]; // cont buf + recv buf: [ ccrrrr]
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char *recvbuf = buf + CONT_BUF_SIZE; // recv buf: ^^^^
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size_t nbytes;
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int fd = open(filename, O_RDONLY);
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if (fd < 0) {
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perror("open");
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exit(1);
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}
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test_init(0);
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while ((nbytes = read(fd, (void*)recvbuf, recv_buf_size)))
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test_input(0, recvbuf, nbytes);
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}
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void test_server(const char* port, size_t recv_buf_size) {
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char buf[CONT_BUF_SIZE + RECV_BUF_SIZE]; // cont buf + recv buf: [ ccrrrr]
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char *recvbuf = buf + CONT_BUF_SIZE; // recv buf: ^^^^
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fd_set master; // master file descriptor list
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fd_set read_fds; // temp file descriptor list for select()
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int fdmax; // maximum file descriptor number
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int listener; // listening socket descriptor
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int newfd; // newly accept()ed socket descriptor
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struct sockaddr_storage remoteaddr; // client address
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socklen_t addrlen;
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size_t nbytes;
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char remoteIP[INET6_ADDRSTRLEN];
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int yes = 1; // for setsockopt() SO_REUSEADDR, below
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int i, rv, ret;
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struct addrinfo hints, *ai, *p;
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struct timeval start[NUM_PARSERS], end[NUM_PARSERS];
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FD_ZERO(&master); // clear the master and temp sets
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FD_ZERO(&read_fds);
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// get us a socket and bind it
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memset(&hints, 0, sizeof hints);
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_PASSIVE;
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if ((rv = getaddrinfo(NULL, port, &hints, &ai)) != 0) {
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fprintf(stderr, "error: %s\n", gai_strerror(rv));
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exit(1);
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}
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for (p = ai; p != NULL; p = p->ai_next) {
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listener = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
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if (listener < 0)
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continue;
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// lose the pesky "address already in use" error message
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setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
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if (bind(listener, p->ai_addr, p->ai_addrlen) < 0) {
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close(listener);
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continue;
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}
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break;
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}
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// if we got here, it means we didn't get bound
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if (p == NULL) {
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fprintf(stderr, "failed to bind\n");
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exit(2);
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}
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freeaddrinfo(ai); // all done with this
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// listen
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if (listen(listener, 10) == -1) {
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perror("listen");
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exit(3);
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}
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// add the listener to the master set
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FD_SET(listener, &master);
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// keep track of the biggest file descriptor
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fdmax = listener; // so far, it's this one
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// main loop
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for (;;) {
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read_fds = master; // copy it
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if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) {
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perror("select");
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exit(4);
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}
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// run through the existing connections looking for data to read
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for (i = 0; i <= fdmax; i++) {
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if (FD_ISSET(i, &read_fds)) { // we got one!!
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if (i == listener) {
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// handle new connections
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if (fdmax == NUM_PARSERS - 1)
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continue; // ignore if there's too many
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addrlen = sizeof remoteaddr;
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newfd = accept(listener, (struct sockaddr *)&remoteaddr, &addrlen);
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if (newfd == -1) {
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perror("accept");
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} else {
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FD_SET(newfd, &master); // add to master set
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if (newfd > fdmax) // keep track of the max
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fdmax = newfd;
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test_init(newfd);
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if (verbose)
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printf("# New connection from %s on socket %d\n",
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inet_ntop(remoteaddr.ss_family,
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get_in_addr((struct sockaddr*)&remoteaddr),
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remoteIP, INET6_ADDRSTRLEN),
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newfd);
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if (stats)
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gettimeofday(&start[newfd], NULL);
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}
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} else {
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// handle data from a client
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if ((nbytes = recv(i, recvbuf, recv_buf_size, 0)) <= 0) {
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if (stats)
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printf("%ld ms\n", (end[i].tv_sec * 1000000 + end[i].tv_usec - start[i].tv_sec * 1000000 - start[i].tv_usec) / 1000);
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// got error or connection closed by client
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if (nbytes == 0) { // connection closed
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if (verbose)
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printf("# Socket %d hung up\n", i);
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} else {
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perror("recv");
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}
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close(i); // bye!
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FD_CLR(i, &master); // remove from master set
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} else {
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// we got some data from a client
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if (verbose >= 2)
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printf("> %ld bytes\n", nbytes);
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if (verbose >= 3)
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printf("> [%.*s]", (int)nbytes, recvbuf);
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ret = test_input(i, recvbuf, nbytes);
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if (stats)
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gettimeofday(&end[i], NULL);
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if (ret < 0) {
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if (verbose)
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printf("# Closing connection: %i\n", i);
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close(i); // bye!
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FD_CLR(i, &master); // remove from master set
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}
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}
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} // END handle data from client
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} // END got new incoming connection
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} // END looping through file descriptors
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} // END for(;;)--and you thought it would never end!
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}
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