143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
#include "main.h"
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#include "session.h"
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#include "user.h"
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#include <arpa/inet.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <unistd.h>
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void server_main_loop(server_data_t *s_d) {
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fd_set readfds;
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int i, sr;
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session *connections[MAX_CONNECTIONS];
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for (i = 0; i < MAX_CONNECTIONS; i++) {
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connections[i] = NULL;
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}
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int maxfd, res;
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for (;;) {
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FD_ZERO(&readfds);
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FD_SET(s_d->ls, &readfds);
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maxfd = s_d->ls;
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for (i = 0; i < MAX_CONNECTIONS; i++) {
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if (connections[i] != NULL) {
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FD_SET(i, &readfds);
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if (i > maxfd)
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maxfd = i;
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/* active uploads/downloads */
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if (connections[i]->fd > -1) {
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int fd = connections[i]->fd;
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FD_SET(fd, &readfds);
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if (fd > maxfd)
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maxfd = fd;
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}
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}
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}
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sr = select(maxfd + 1, &readfds, NULL, NULL, NULL);
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if (sr == -1) {
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perror("select");
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exit(6);
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}
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if (FD_ISSET(s_d->ls, &readfds)) {
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if (-1 == accept_client(s_d->ls, connections, s_d->welcome_message)) {
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fprintf(stderr, "Can't accept connection, error: %d\n", errno);
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}
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}
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for (i = 0; i < MAX_CONNECTIONS; i++) {
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/* download/upload file */
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if (connections[i] != NULL && (connections[i]->state == OP_UPLOAD ||
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connections[i]->state == OP_DOWNLOAD)) {
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if (connections[i]->fd > -1 &&
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FD_ISSET(connections[i]->fd, &readfds)) {
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perform_session_action(connections[i], NULL, s_d);
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}
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} else if (connections[i] != NULL && FD_ISSET(i, &readfds)) {
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/* server/client requests */
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session *sess = connections[i];
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char *line;
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res = session_do_read(sess, &line);
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if (line != NULL && res) {
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perform_session_action(sess, line, s_d);
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free(line);
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if (sess->state == ERR) {
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close_session(connections, i);
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}
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}
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if (res == 0) {
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close_session(connections, i);
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}
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}
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}
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}
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}
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char *get_welcome_mes() {
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int fd = open(WELCOME_FILE_NAME, O_RDONLY);
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if (fd == -1) {
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perror(WELCOME_FILE_NAME);
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exit(7);
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}
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int filesize = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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char *welcome_message =
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mmap(NULL, filesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
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if (welcome_message == MAP_FAILED) {
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perror(WELCOME_FILE_NAME);
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close(fd);
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exit(5);
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}
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close(fd);
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return welcome_message;
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}
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int start_server() {
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int res;
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int ls = socket(AF_INET, SOCK_STREAM, 0);
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struct sockaddr_in s_addr;
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s_addr.sin_family = AF_INET;
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s_addr.sin_port = htons(PORT);
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s_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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int opt = 1;
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setsockopt(ls, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
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res = bind(ls, (struct sockaddr *)&s_addr, sizeof(s_addr));
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if (res == -1) {
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perror("bind");
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exit(3);
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}
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res = listen(ls, LISTEN_QLEN);
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if (res == -1) {
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perror("listen");
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exit(4);
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}
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return ls;
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}
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void prepare_start(int argc, char *argv[]) {
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if (argc != 2) {
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fprintf(stderr, "Usage: %s <work_dir>\n", argv[0]);
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exit(1);
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}
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if (-1 == chdir(argv[1])) {
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perror(argv[1]);
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exit(2);
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}
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} |