123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
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/*
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* XCid - network stuff
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* (C)2004, Dan Ponte
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Dan Ponte nor the names of his contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY DAN PONTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL DAN PONTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.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 <netinet/in.h>
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#include <arpa/inet.h>
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#define PORT 3890
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#define BUFFERL 256
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struct sockaddr_in servsad;
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char servaddr[256];
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void telluser(char* buf);
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void sendtoser(char* txt)
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{
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int s;
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struct sockaddr_in sin;
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s = socket(PF_INET, SOCK_DGRAM, 0);
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bzero(&sin, sizeof sin);
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sin.sin_family = AF_INET;
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sin.sin_addr = servsad.sin_addr;/*.s_addr = inet_addr(servaddr); */
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#ifdef DEBUG
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printf("it is %s\n", inet_ntoa(sin.sin_addr));
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#endif
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sin.sin_port = htons(1450);
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if(connect(s, (struct sockaddr *)&sin, sizeof sin) < 0) {
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perror("Connect");
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exit(-1);
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}
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write(s, txt, strlen(txt) + 1);
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close(s);
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return;
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}
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int start_netloop(void)
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{
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int sockfd, addr_len, nbytes;
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struct sockaddr_in ouraddr;
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struct sockaddr_in* bcasaddr;
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struct timeval tv;
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bcasaddr = &servsad;
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bzero(&servsad, sizeof servsad);
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fd_set fds_read;
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FD_ZERO(&fds_read);
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char buffer[BUFFERL];
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if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
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perror("sock");
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exit(-1);
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}
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ouraddr.sin_family = AF_INET;
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ouraddr.sin_port = htons(PORT);
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ouraddr.sin_addr.s_addr = INADDR_ANY;
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memset(&(ouraddr.sin_zero), 0, 8);
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if(bind(sockfd, (struct sockaddr*)&ouraddr, sizeof(struct sockaddr)) == -1) {
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perror("bind");
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exit(-2);
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}
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addr_len = sizeof(struct sockaddr);
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while(1)
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{
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FD_ZERO(&fds_read);
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FD_SET(sockfd, &fds_read);
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tv.tv_sec = 3; tv.tv_usec = 0;
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switch(select(sockfd + 1, &fds_read, NULL, NULL, NULL))
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{
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case -1:
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perror("select");
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exit(-1);
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break;
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default:
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if(FD_ISSET(sockfd, &fds_read) != 0)
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{
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if((nbytes = recvfrom(sockfd, buffer, BUFFERL - 1, 0, (struct sockaddr*)bcasaddr, &addr_len
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)) == -1) {
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perror("recv");
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exit(-3);
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}
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buffer[nbytes] = 0;
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#ifdef DEBUG
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printf("got %s\n", buffer);
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#endif
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telluser(buffer);
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memset(buffer, 0, BUFFERL);
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}
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}
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}
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close(sockfd);
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return 0;
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}
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