#include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <errno.h> #include <stdio.h> #include <ctype.h> #include <signal.h> #include <stdio.h> #define saddr ntohl(sin.sin_addr.s_addr) #define PORT 4040 #define FILENAME "/home/mordor/.msg" extern errno; int cfd, s2; void aborting(); main(argc, argv) int argc; char *argv[]; { int s,i; int fd; int len = sizeof(struct sockaddr_in); struct servent *ps; struct sockaddr_in sin; signal(SIGPIPE,SIG_IGN); if((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) { exit(1); } sin.sin_addr.s_addr = INADDR_ANY; sin.sin_port = htons(PORT); i = 1; setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(int)); if(bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) { exit(1); } listen(s, 5); while(1) { len = sizeof(struct sockaddr_in); if((fd = accept(s, (struct sockaddr *) &sin, &len)) < 0) { exit(1); } log("connection accepted from: %d.%d.%d.%d\n", (unsigned)(saddr)>>24, (saddr & 0x00ff0000)>>16, (saddr & 0x0000ff00)>>8, (saddr & 0x000000ff)); if(fork()) { cfd = fd; if(fd > 16) { printf("Descriptor too large.\n"); exit(0); } signal(SIGPIPE,aborting); client(); } close(fd); } } client() { int readfds; char buf[1024], address[30], port[10]; int len=1, i=0, j=0; unsigned long addr; struct sockaddr_in sin2; int s2_flag, cfd_flag, readfds_flag; char outbuf[8192]; FILE *fp; ioctl(cfd, FIONBIO, &len); fp = fopen(FILENAME, "r"); if(!fp) aborting(); fread(outbuf, 8192, 1, fp); fclose(fp); write_msg(outbuf); sleep(4); aborting(); } write_msg(str) char *str; { write(cfd, str, strlen(str)); } read_msg(str,slen) char *str; int slen; { int readfds; int num=0, len; char ch; do { readfds = 1<<cfd; while(!select(16, &readfds, 0, 0, 0)) ; len = read(cfd, &ch, 1); if(len == 0) aborting(); if(ch == 8 || ch == 127) num--; else if(ch == 10 || num==slen-1) ch = 0; if(ch != 13 && ch != 8 && ch != 127) str[num++] = ch; } while(ch); } void aborting(arg) int arg; { int i=0; write_msg("Connection dropped.\n"); signal(SIGPIPE,SIG_IGN); ioctl(cfd, FIONBIO, &i); ioctl(s2, FIONBIO, &i); close(cfd); close(s2); exit(0); } log(fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) char *fmt; int a1,a2,a3,a4,a5,a6,a7,a8,a9; { FILE *fp; if((fp = fopen("/home/Isengard/mordor/log/msg.log", "a")) == NULL) return; fprintf(fp, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); fclose(fp); }