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-rw-r--r--FICS/network.c.orig657
1 files changed, 657 insertions, 0 deletions
diff --git a/FICS/network.c.orig b/FICS/network.c.orig
new file mode 100644
index 0000000..eed60c8
--- /dev/null
+++ b/FICS/network.c.orig
@@ -0,0 +1,657 @@
+/* network.c
+ *
+ */
+
+#include "stdinclude.h"
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/telnet.h>
+
+#include "common.h"
+#include "utils.h"
+#include "playerdb.h"
+#include "network.h"
+#include "rmalloc.h"
+#ifdef TIMESEAL
+#include "timeseal.h"
+#endif
+
+extern int errno;
+
+/* grimm */
+#if defined(SGI)
+#else
+/*
+int send(int s, char *msg, int len, int flags);
+int recv(int s, char *buf, int len, int flags);
+char *memset(char *s, int c, int n);
+int setsockopt( int s, int level, int optname, char *optval, int optlen);
+int accept(int s, struct sockaddr *addr, size_t *addrlen);
+void *memmove(void *dst0, const void *src0, register size_t length);
+int bind(int s, struct sockaddr *name, int namelen);
+int select(int width, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+ struct timeval *timeout);
+int listen(int s, int level);
+*/
+#endif
+/* added for warning */
+
+PRIVATE int sockfd = 0; /* The socket */
+PRIVATE int numConnections = 0;
+/* Sparse array */
+PUBLIC connection con[256];
+
+PUBLIC int no_file;
+PUBLIC int max_connections;
+
+/* Index == fd, for sparse array, quick lookups! wasted memory :( */
+PUBLIC int findConnection(int fd)
+{
+ if (con[fd].status == NETSTAT_EMPTY)
+ return -1;
+ else
+ return fd;
+}
+
+PUBLIC int net_addConnection(int fd, unsigned int fromHost)
+{
+ int noblock = 1;
+
+ if (findConnection(fd) >= 0) {
+ fprintf(stderr, "FICS: FD already in connection table!\n");
+ return -1;
+ }
+ if (numConnections == max_connections)
+ return -1;
+ if (ioctl(fd, FIONBIO, &noblock) == -1) {
+ fprintf(stderr, "Error setting nonblocking mode errno=%d\n", errno);
+ }
+ con[fd].fd = fd;
+ if (fd != 0)
+ con[fd].outFd = fd;
+ else
+ con[fd].outFd = 1;
+ con[fd].fromHost = fromHost;
+ con[fd].status = NETSTAT_CONNECTED;
+#ifdef TIMESEAL
+ con[fd].user[0]='\0';
+ con[fd].sys[0]='\0';
+ con[fd].timeseal = 0;
+ con[fd].time = 0;
+#endif
+ con[fd].numPending = 0;
+ con[fd].processed = 0;
+ con[fd].outPos = 0;
+ if (con[fd].sndbuf == NULL) {
+#ifdef DEBUG
+ fprintf(stderr, "FICS: nac(%d) allocating sndbuf.\n", fd);
+#endif
+ con[fd].sndbufpos = 0;
+ con[fd].sndbufsize = MAX_STRING_LENGTH;
+ con[fd].sndbuf = rmalloc(MAX_STRING_LENGTH);
+ } else {
+#ifdef DEBUG
+ fprintf(stderr, "FICS: nac(%d) reusing old sndbuf size %d pos %d.\n", fd, con[fd].sndbufsize, con[fd].sndbufpos);
+#endif
+ }
+ con[fd].state = 0;
+ numConnections++;
+
+#ifdef DEBUG
+ fprintf(stderr, "FICS: fd: %d connections: %d descriptors: %d \n", fd, numConnections, getdtablesize()); /* sparky 3/13/95 */
+#endif
+
+ return 0;
+}
+
+PRIVATE int remConnection(int fd)
+{
+ int which;
+ if ((which = findConnection(fd)) < 0) {
+ return -1;
+ }
+ numConnections--;
+ con[fd].status = NETSTAT_EMPTY;
+ if (con[fd].sndbuf == NULL) {
+ fprintf(stderr, "FICS: remcon(%d) totally screwed, this shouldn't happen.\n", fd);
+ } else {
+ if (con[fd].sndbufsize > MAX_STRING_LENGTH) {
+ con[fd].sndbufsize = MAX_STRING_LENGTH;
+ con[fd].sndbuf = rrealloc(con[fd].sndbuf, MAX_STRING_LENGTH);
+ }
+ if (con[fd].sndbufpos) { /* didn't send everything, bummer */
+ con[fd].sndbufpos = 0;
+ }
+ }
+ return 0;
+}
+
+PRIVATE void net_flushme(int which)
+{
+ int sent;
+
+ sent = send(con[which].outFd, con[which].sndbuf, con[which].sndbufpos, 0);
+ if (sent == -1) {
+ if (errno != EPIPE) /* EPIPE = they've disconnected */
+ fprintf(stderr, "FICS: net_flushme(%d) couldn't send, errno=%d.\n", which, errno);
+ con[which].sndbufpos = 0;
+ } else {
+ con[which].sndbufpos -= sent;
+ if (con[which].sndbufpos)
+ memmove(con[which].sndbuf, con[which].sndbuf + sent, con[which].sndbufpos);
+ }
+ if (con[which].sndbufsize > MAX_STRING_LENGTH && con[which].sndbufpos < MAX_STRING_LENGTH) {
+ /* time to shrink the buffer */
+ con[which].sndbuf = rrealloc(con[which].sndbuf, MAX_STRING_LENGTH);
+ con[which].sndbufsize = MAX_STRING_LENGTH;
+ }
+}
+
+PRIVATE void net_flush_all_connections(void)
+{
+ int which;
+ fd_set writefds;
+ struct timeval to;
+
+ FD_ZERO(&writefds);
+ for (which = 0; which < max_connections; which++)
+ if (con[which].status == NETSTAT_CONNECTED && con[which].sndbufpos)
+ FD_SET(con[which].outFd, &writefds);
+
+ to.tv_usec = 0;
+ to.tv_sec = 0;
+ select(no_file, NULL, &writefds, NULL, &to);
+ for (which = 0; which < max_connections; which++) {
+ if (FD_ISSET(con[which].outFd, &writefds)) {
+ net_flushme(which);
+ }
+ }
+}
+
+PRIVATE void net_flush_connection(int fd)
+{
+ int which;
+ fd_set writefds;
+ struct timeval to;
+
+ if (((which = findConnection(fd)) >= 0) && (con[which].sndbufpos)) {
+ FD_ZERO(&writefds);
+ FD_SET(con[which].outFd, &writefds);
+ to.tv_usec = 0;
+ to.tv_sec = 0;
+ select(no_file, NULL, &writefds, NULL, &to);
+ if (FD_ISSET(con[which].outFd, &writefds)) {
+ net_flushme(which);
+ }
+ }
+ return;
+}
+
+PRIVATE int sendme(int which, char *str, int len)
+{
+ int i, count;
+ fd_set writefds;
+ struct timeval to;
+ count = len;
+
+ while ((i = ((con[which].sndbufsize - con[which].sndbufpos) < len) ? (con[which].sndbufsize - con[which].sndbufpos) : len) > 0) {
+ memmove(con[which].sndbuf + con[which].sndbufpos, str, i);
+ con[which].sndbufpos += i;
+ if (con[which].sndbufpos == con[which].sndbufsize) {
+
+ FD_ZERO(&writefds);
+ FD_SET(con[which].outFd, &writefds);
+ to.tv_usec = 0;
+ to.tv_sec = 0;
+ select(no_file, NULL, &writefds, NULL, &to);
+ if (FD_ISSET(con[which].outFd, &writefds)) {
+ net_flushme(which);
+ } else {
+ /* time to grow the buffer */
+ con[which].sndbufsize += MAX_STRING_LENGTH;
+ con[which].sndbuf = rrealloc(con[which].sndbuf, con[which].sndbufsize);
+ }
+ }
+ str += i;
+ len -= i;
+ }
+ return count;
+}
+
+/*
+ * -1 for an error other than EWOULDBLOCK.
+ * Put <lf> after every <cr> and put \ at the end of overlength lines.
+ * Doesn't send anything unless the buffer fills, output waits until
+ * flushed
+*/
+PUBLIC int net_send_string(int fd, char *str, int format)
+{
+ int which, i, j;
+
+ if ((which = findConnection(fd)) < 0) {
+ return -1;
+ }
+ while (*str) {
+ for (i = 0; str[i] >= ' '; i++);
+ if (i) {
+ if (format && (i >= (j = LINE_WIDTH - con[which].outPos))) { /* word wrap */
+ i = j;
+ while (i > 0 && str[i - 1] != ' ')
+ i--;
+ while (i > 0 && str[i - 1] == ' ')
+ i--;
+ if (i == 0)
+ i = j - 1;
+ sendme(which, str, i);
+ sendme(which, "\n\r\\ ", 6);
+ con[which].outPos = 4;
+ while (str[i] == ' ') /* eat the leading spaces after we wrap */
+ i++;
+ } else {
+ sendme(which, str, i);
+ con[which].outPos += i;
+ }
+ str += i;
+ } else { /* non-printable stuff handled here */
+ switch (*str) {
+ case '\t':
+ sendme(which, " ", 8 - (con[which].outPos & 7));
+ con[which].outPos &= ~7;
+ if (con[which].outPos += 8 >= LINE_WIDTH)
+ con[which].outPos = 0;
+ break;
+ case '\n':
+ sendme(which, "\n\r", 2);
+ con[which].outPos = 0;
+ break;
+ case '\033':
+ con[which].outPos -= 3;
+ default:
+ sendme(which, str, 1);
+ }
+ str++;
+ }
+ }
+ return 0;
+}
+
+/* if we get a complete line (something terminated by \n), copy it to com
+ and return 1.
+ if we don't get a complete line, but there is no error, return 0.
+ if some error, return -1.
+ */
+PUBLIC int readline2(char *com, int who)
+{
+ unsigned char *start, *s, *d;
+ int howmany, state, fd, pending;
+
+ static unsigned char will_tm[] = {IAC, WILL, TELOPT_TM, '\0'};
+ static unsigned char will_sga[] = {IAC, WILL, TELOPT_SGA, '\0'};
+ static unsigned char ayt[] = "[Responding to AYT: Yes, I'm here.]\n";
+
+ state = con[who].state;
+ if ((state == 2) || (state > 4)) {
+ fprintf(stderr, "FICS: state screwed for con[%d], this is a bug.\n", who);
+ state = 0;
+ }
+ s = start = con[who].inBuf;
+ pending = con[who].numPending;
+ fd = con[who].fd;
+
+ howmany = recv(fd, start + pending, MAX_STRING_LENGTH - 1 - pending, 0);
+ if (howmany == 0) /* error: they've disconnected */
+ return (-1);
+ else if (howmany == -1) {
+ if (errno != EWOULDBLOCK) { /* some other error */
+ return (-1);
+ } else if (con[who].processed) { /* nothing new and nothing old */
+ return (0);
+ } else { /* nothing new, but some unprocessed old */
+ howmany = 0;
+ }
+ }
+ if (con[who].processed)
+ s += pending;
+ else
+ howmany += pending;
+ d = s;
+
+ for (; howmany-- > 0; s++) {
+ switch (state) {
+ case 0: /* Haven't skipped over any control chars or
+ telnet commands */
+ if (*s == IAC) {
+ d = s;
+ state = 1;
+ } else if (*s == '\n') {
+ *s = '\0';
+ strcpy(com, start);
+ if (howmany)
+ bcopy(s + 1, start, howmany);
+ con[who].state = 0;
+ con[who].numPending = howmany;
+ con[who].processed = 0;
+ con[who].outPos = 0;
+ return (1);
+ } else if ((*s > (0xff - 0x20)) || (*s < 0x20)) {
+ d = s;
+ state = 2;
+ }
+ break;
+ case 1: /* got telnet IAC */
+ if (*s == IP)
+ return (-1); /* ^C = logout */
+ else if (*s == DO)
+ state = 4;
+ else if ((*s == WILL) || (*s == DONT) || (*s == WONT))
+ state = 3; /* this is cheesy, but we aren't using em */
+ else if (*s == AYT) {
+ send(fd, (char *) ayt, strlen((char *) ayt), 0);
+ state = 2;
+ } else if (*s == EL) { /* erase line */
+ d = start;
+ state = 2;
+ } else /* dunno what it is, so ignore it */
+ state = 2;
+ break;
+ case 2: /* we've skipped over something, need to
+ shuffle processed chars down */
+ if (*s == IAC)
+ state = 1;
+ else if (*s == '\n') {
+ *d = '\0';
+ strcpy(com, start);
+ if (howmany)
+ memmove(start, s + 1, howmany);
+ con[who].state = 0;
+ con[who].numPending = howmany;
+ con[who].processed = 0;
+ con[who].outPos = 0;
+ return (1);
+ } else if (*s >= ' ')
+ *(d++) = *s;
+ break;
+ case 3: /* some telnet junk we're ignoring */
+ state = 2;
+ break;
+ case 4: /* got IAC DO */
+ if (*s == TELOPT_TM)
+ send(fd, (char *) will_tm, strlen((char *) will_tm), 0);
+ else if (*s == TELOPT_SGA)
+ send(fd, (char *) will_sga, strlen((char *) will_sga), 0);
+ state = 2;
+ break;
+ }
+ }
+ if (state == 0)
+ d = s;
+ else if (state == 2)
+ state = 0;
+ con[who].state = state;
+ con[who].numPending = d - start;
+ con[who].processed = 1;
+ if (con[who].numPending == MAX_STRING_LENGTH - 1) { /* buffer full */
+ *d = '\0';
+ strcpy(com, start);
+ con[who].state = 0;
+ con[who].numPending = 0;
+ con[who].processed = 0;
+ return (1);
+ }
+ return (0);
+}
+
+/*
+PRIVATE int readline(int who)
+{
+ int e, fd = con[who].fd;
+ char *t = con[who].inBuf;
+ int recvCount;
+ int totalCount = 0;
+ unsigned char c;
+ static unsigned char will_tm[] = {IAC, WILL, TELOPT_TM, '\0'};
+ static unsigned char will_sga[] = {IAC, WILL, TELOPT_SGA, '\0'};
+
+ t += con[who].numPending;
+
+ while ((recvCount = recv(fd, (char *) &c, 1, 0)) == 1) {
+ totalCount += recvCount;
+ if (c == IAC) {
+ recvCount = recv(fd, (char *) &c, 1, 0);
+ if (recvCount == 1) {
+ totalCount += recvCount;
+ switch (c) {
+ case IP:
+ c = '\3';
+ break;
+ case DO:
+ recvCount = recv(fd, (char *) &c, 1, 0);
+ if (recvCount == 1) {
+ totalCount += recvCount;
+ if (c == TELOPT_TM) {
+ send(fd, (char *) will_tm, strlen((char *) will_tm), 0);
+ } else if (c == TELOPT_SGA) {
+ send(fd, (char *) will_sga, strlen((char *) will_sga), 0);
+ }
+ }
+ c = '\0';
+ break;
+ case DONT:
+ recvCount = recv(fd, (char *) &c, 1, 0);
+ break;
+ c = '\0';
+ default:
+ recvCount = recv(fd, (char *) &c, 1, 0);
+ c = '\0';
+ break;
+ }
+ }
+ }
+ if (c != '\r' && c > 2) {
+ if (isprint(c) || (c == '\n')) {
+ *t++ = c;
+ con[who].numPending++;
+ }
+ }
+ if (c == '\n' || con[who].numPending >= MAX_STRING_LENGTH - 1) {
+ *--t = '\0';
+ con[who].numPending = 0;
+ con[fd].outPos = 0;
+ return 1;
+ }
+ }
+
+ *t = '\0';
+ e = ((totalCount == 0) || (errno != EWOULDBLOCK)) ? -1 : 0;
+ return (e);
+}
+*/
+
+PUBLIC int net_init(int port)
+{
+ int i;
+ int opt;
+ struct sockaddr_in serv_addr;
+ struct linger lingeropt;
+
+ no_file = getdtablesize();
+/* Although we have 256 descriptors to work with for opening sockets,
+ * we can only use 126 maximum of them for some reason... built in
+ * limitation of the socket libs? Sparky 3/13/95
+ */
+ if (no_file > MAX_PLAYER + 10)
+ no_file = MAX_PLAYER + 10;
+ max_connections = no_file - 10;
+ for (i = 0; i < no_file; i++) {
+ con[i].status = NETSTAT_EMPTY;
+ con[i].sndbuf = NULL;
+ con[i].sndbufsize = con[i].sndbufpos = 0;
+ }
+ /* Open a TCP socket (an Internet stream socket). */
+ if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ fprintf(stderr, "FICS: can't open stream socket\n");
+ return -1;
+ }
+ /* Bind our local address so that the client can send to us */
+ memset((char *) &serv_addr, 0, sizeof(serv_addr));
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+ serv_addr.sin_port = htons(port);
+
+ /** added in an attempt to allow rebinding to the port **/
+
+ opt = 1;
+ setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof(opt));
+ opt = 1;
+ setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, (char *) &opt, sizeof(opt));
+ lingeropt.l_onoff = 0;
+ lingeropt.l_linger = 0;
+ setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char *) &lingeropt, sizeof(lingeropt));
+
+/*
+#ifdef DEBUG
+ opt = 1;
+ setsockopt(sockfd, SOL_SOCKET, SO_DEBUG, (char *)&opt, sizeof(opt));
+#endif
+*/
+
+ if (bind(sockfd, (struct sockaddr *) & serv_addr, sizeof(serv_addr)) < 0) {
+ fprintf(stderr, "FICS: can't bind local address. errno=%d\n", errno);
+ return -1;
+ }
+ opt = 1;
+ ioctl(sockfd, FIONBIO, &opt);
+ listen(sockfd, 5);
+ return 0;
+}
+
+PUBLIC void net_close(void)
+{
+ int i;
+ for (i = 0; i < no_file; i++) {
+ if (con[i].status != NETSTAT_EMPTY)
+ net_close_connection(con[i].fd);
+ }
+}
+
+PUBLIC void net_close_connection(int fd)
+{
+ if (con[fd].status == NETSTAT_CONNECTED)
+ net_flush_connection(fd);
+ if (!remConnection(fd)) {
+ if (fd > 2)
+ close(fd);
+ }
+}
+
+PUBLIC void turn_echo_on(int fd)
+{
+ static unsigned char wont_echo[] = {IAC, WONT, TELOPT_ECHO, '\0'};
+
+ send(fd, (char *) wont_echo, strlen((char *) wont_echo), 0);
+}
+
+PUBLIC void turn_echo_off(int fd)
+{
+ static unsigned char will_echo[] = {IAC, WILL, TELOPT_ECHO, '\0'};
+
+ send(fd, (char *) will_echo, strlen((char *) will_echo), 0);
+}
+
+PUBLIC unsigned int net_connected_host(int fd)
+{
+ int which;
+
+ if ((which = findConnection(fd)) < 0) {
+ fprintf(stderr, "FICS: FD not in connection table!\n");
+ return -1;
+ }
+ return con[which].fromHost;
+}
+
+PUBLIC void ngc2(char *com, int timeout)
+{
+ struct sockaddr_in cli_addr;
+ size_t cli_len = sizeof(struct sockaddr_in);
+
+ int fd, loop, nfound, lineComplete;
+ fd_set readfds;
+ struct timeval to;
+
+ while ((fd = accept(sockfd, (struct sockaddr *) & cli_addr, &cli_len)) != -1) {
+ if (net_addConnection(fd, cli_addr.sin_addr.s_addr)) {
+ char *woo =
+"FICS is currently full. Please try one of the following sites:\n\r\n\r"
+"E-FICS: krypton.daimi.aau.dk 5000 (130.225.18.157 5000) Main EURO server\n\r"
+"D-FICS: dds.hacktic.nl 5000 (193.78.33.69 5000) Dutch server\n\r"
+"B-FICS: holly.csv.warwick.ac.uk 5000 (137.205.192.12 5000) British server\n\r"
+"?-FICS: chess.unix-ag.uni-kl.de 5000 (131.246.89.3 5000) German server\n\r"
+"M-FICS: wisdom.weizmann.ac.il 5000 (132.76.80.77 5000) Mid-east server\n\r\n\r";
+ fprintf(stderr, "FICS is full. fd = %d\n");
+ write (fd, woo, strlen(woo));
+ sleep(1);
+ close(fd);
+ } else {
+/* int opt, optlen;
+
+ opt = 1024;
+ setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *)&opt, sizeof(opt));
+ opt = 8192;
+ setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &opt, sizeof(opt));
+ optlen = sizeof(opt);
+ getsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *)&opt, &optlen);
+ fprintf(stderr, "%d sndbuf: %d", fd, opt);
+ optlen = sizeof(opt);
+ getsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *)&opt, &optlen);
+ fprintf(stderr, " rcvbuf: %d\n", opt);
+*/
+ process_new_connection(fd, net_connected_host(fd));
+ }
+ }
+ if (errno != EWOULDBLOCK)
+ fprintf(stderr, "FICS: Problem with accept(). errno=%d\n", errno);
+
+ net_flush_all_connections();
+
+ FD_ZERO(&readfds);
+ for (loop = 0; loop < no_file; loop++)
+ if (con[loop].status != NETSTAT_EMPTY)
+ FD_SET(con[loop].fd, &readfds);
+
+ to.tv_usec = 0;
+ to.tv_sec = timeout;
+ nfound = select(no_file, &readfds, NULL, NULL, &to);
+ for (loop = 0; loop < no_file; loop++) {
+ if (con[loop].status != NETSTAT_EMPTY) {
+ fd = con[loop].fd;
+ lineComplete = readline2(com, fd);
+ if (lineComplete == 0) /* partial line: do nothing with it */
+ continue;
+ if (lineComplete > 0) { /* complete line: process it */
+#ifdef TIMESEAL
+ if (!(parseInput(com, &con[loop]))) continue;
+#endif
+ if (process_input(fd, com) != COM_LOGOUT) {
+ net_flush_connection(fd);
+ continue;
+ }
+ }
+ /* Disconnect anyone who gets here */
+ process_disconnection(fd);
+ net_close_connection(fd);
+ }
+ }
+}
+
+PUBLIC int net_consize(void)
+{
+ int i, total;
+
+ total = sizeof(con);
+ for (i=0; i < no_file; i++)
+ total += con[i].sndbufsize;
+
+ return(total);
+}
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