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Diffstat (limited to 'games/hunt/huntd/driver.c')
-rw-r--r--games/hunt/huntd/driver.c153
1 files changed, 108 insertions, 45 deletions
diff --git a/games/hunt/huntd/driver.c b/games/hunt/huntd/driver.c
index 5618a8f3118..8957e0cedad 100644
--- a/games/hunt/huntd/driver.c
+++ b/games/hunt/huntd/driver.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: driver.c,v 1.6 1999/03/22 00:29:15 pjanzen Exp $ */
+/* $OpenBSD: driver.c,v 1.7 1999/12/12 15:13:50 d Exp $ */
/* $NetBSD: driver.c,v 1.5 1997/10/20 00:37:16 lukem Exp $ */
/*
* Hunt
@@ -17,6 +17,7 @@
#include <stdio.h>
#include <tcpd.h>
#include <syslog.h>
+#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
@@ -27,8 +28,7 @@
#include "server.h"
char *First_arg; /* pointer to argv[0] */
-char *Last_arg; /* pointer to end of argv/environ */
-u_int16_t Server_port = HUNT_PORT;
+u_int16_t Server_port;
int Server_socket; /* test socket to answer datagrams */
FLAG should_announce = TRUE; /* true if listening on standard port */
u_short sock_port; /* port # of tcp listen socket */
@@ -38,7 +38,7 @@ in_addr_t Server_addr = INADDR_ANY; /* address to bind to */
static void clear_scores __P((void));
static int havechar __P((PLAYER *));
static void init __P((void));
- int main __P((int, char *[], char *[]));
+ int main __P((int, char *[]));
static void makeboots __P((void));
static void send_stats __P((void));
static void zap __P((PLAYER *, FLAG));
@@ -52,12 +52,12 @@ static void handle_wkport __P((int));
* The main program.
*/
int
-main(ac, av, ep)
+main(ac, av)
int ac;
- char **av, **ep;
+ char **av;
{
- PLAYER *pp;
- int had_char;
+ PLAYER *pp;
+ int had_char;
static fd_set read_fds;
static FLAG first = TRUE;
static FLAG server = FALSE;
@@ -66,20 +66,20 @@ main(ac, av, ep)
int c;
static struct timeval linger = { 0, 0 };
static struct timeval timeout = { 0, 0 }, *to;
- struct spawn *sp;
+ struct spawn *sp, *spnext;
int ret;
int nready;
+ int fd;
First_arg = av[0];
- if (ep == NULL || *ep == NULL)
- ep = av + ac;
- while (*ep)
- ep++;
- Last_arg = ep[-1] + strlen(ep[-1]);
+
+ /* Revoke privs: */
+ setegid(getgid());
+ setgid(getgid());
config();
- while ((c = getopt(ac, av, "sp:a:")) != -1) {
+ while ((c = getopt(ac, av, "sp:a:D:")) != -1) {
switch (c) {
case 's':
server = TRUE;
@@ -89,10 +89,12 @@ main(ac, av, ep)
Server_port = atoi(optarg);
break;
case 'a':
- Server_addr = inet_addr(optarg);
- if (Server_addr == INADDR_NONE)
+ if (!inet_aton(optarg, (struct in_addr *)&Server_addr))
err(1, "bad interface address: %s", optarg);
break;
+ case 'D':
+ config_arg(optarg);
+ break;
default:
erred:
fprintf(stderr, "Usage: %s [-s] [-p port] [-a addr]\n",
@@ -163,16 +165,33 @@ again:
Have_inp = read_fds;
/* Answer new player connections: */
- if (FD_ISSET(Socket, &read_fds))
+ if (FD_ISSET(Socket, &Have_inp))
answer_first();
/* Continue answering new player connections: */
- for (sp = Spawn; sp; sp = sp->next)
- if (FD_ISSET(sp->fd, &read_fds) && answer_next(sp)) {
+ for (sp = Spawn; sp; ) {
+ spnext = sp->next;
+ fd = sp->fd;
+ if (FD_ISSET(fd, &Have_inp) && answer_next(sp)) {
+ /*
+ * Remove from the spawn list. (fd remains in
+ * read set).
+ */
+ *sp->prevnext = sp->next;
+ if (sp->next)
+ sp->next->prevnext = sp->prevnext;
+ free(sp);
+
+ /* We probably consumed all data. */
+ FD_CLR(fd, &Have_inp);
+
+ /* Announce game if this is the first spawn. */
if (first && should_announce)
announce_game();
first = FALSE;
- }
+ }
+ sp = spnext;
+ }
/* Process input and move bullets until we've exhausted input */
had_char = TRUE;
@@ -206,32 +225,34 @@ again:
}
/* Handle a datagram sent to the server socket: */
- if (FD_ISSET(Server_socket, &read_fds))
+ if (FD_ISSET(Server_socket, &Have_inp))
handle_wkport(Server_socket);
/* Answer statistics connections: */
- if (FD_ISSET(Status, &read_fds))
+ if (FD_ISSET(Status, &Have_inp))
send_stats();
/* Flush/synchronize all the displays: */
for (pp = Player; pp < End_player; pp++) {
- if (FD_ISSET(pp->p_fd, &read_fds))
+ if (FD_ISSET(pp->p_fd, &read_fds)) {
sendcom(pp, READY, pp->p_nexec);
- pp->p_nexec = 0;
+ pp->p_nexec = 0;
+ }
flush(pp);
}
for (pp = Monitor; pp < End_monitor; pp++) {
- if (FD_ISSET(pp->p_fd, &read_fds))
+ if (FD_ISSET(pp->p_fd, &read_fds)) {
sendcom(pp, READY, pp->p_nexec);
- pp->p_nexec = 0;
+ pp->p_nexec = 0;
+ }
flush(pp);
}
} while (Nplayer > 0);
/* No more players! */
- /* Continuous game? */
- if (conf_linger < 0)
+ /* No players yet or a continuous game? */
+ if (first || conf_linger < 0)
goto again;
/* Wait a short while for one to come back: */
@@ -276,10 +297,11 @@ init()
{
int i;
struct sockaddr_in test_port;
- int msg;
- int len;
+ int true = 1;
+ socklen_t len;
struct sockaddr_in addr;
struct sigaction sact;
+ struct servent *se;
(void) setsid();
if (setpgid(getpid(), getpid()) == -1)
@@ -341,9 +363,7 @@ init()
addr.sin_port = 0;
Socket = socket(AF_INET, SOCK_STREAM, 0);
- msg = 1;
- if (setsockopt(Socket, SOL_SOCKET, SO_USELOOPBACK, &msg, sizeof msg)<0)
- log(LOG_ERR, "setsockopt loopback");
+
if (bind(Socket, (struct sockaddr *) &addr, sizeof addr) < 0) {
log(LOG_ERR, "bind");
cleanup(1);
@@ -366,6 +386,15 @@ init()
FD_SET(Status, &Fds_mask);
Num_fds = ((Socket > Status) ? Socket : Status) + 1;
+ /* Find the port that huntd should run on */
+ if (Server_port == 0) {
+ se = getservbyname("hunt", "udp");
+ if (se != NULL)
+ Server_port = ntohs(se->s_port);
+ else
+ Server_port = HUNT_PORT;
+ }
+
/* Check if stdin is a socket: */
len = sizeof (struct sockaddr_in);
if (getsockname(STDIN_FILENO, (struct sockaddr *) &test_port, &len) >= 0
@@ -374,6 +403,7 @@ init()
Server_socket = STDIN_FILENO;
conf_logerr = 0;
if (test_port.sin_port != htons((u_short) Server_port)) {
+ /* Private game */
should_announce = FALSE;
Server_port = ntohs(test_port.sin_port);
}
@@ -383,6 +413,12 @@ init()
test_port.sin_port = htons((u_short) Server_port);
Server_socket = socket(AF_INET, SOCK_DGRAM, 0);
+
+ /* Permit multiple huntd's on the same port. */
+ if (setsockopt(Server_socket, SOL_SOCKET, SO_REUSEPORT, &true,
+ sizeof true) < 0)
+ log(LOG_ERR, "setsockopt SO_REUSEADDR");
+
if (bind(Server_socket, (struct sockaddr *) &test_port,
sizeof test_port) < 0) {
log(LOG_ERR, "bind port %d", Server_port);
@@ -862,11 +898,12 @@ static int
havechar(pp)
PLAYER *pp;
{
+ int ret;
/* Do we already have characters? */
if (pp->p_ncount < pp->p_nchar)
return TRUE;
- /* Is the player being quiet? */
+ /* Ignore if nothing to read. */
if (!FD_ISSET(pp->p_fd, &Have_inp))
return FALSE;
/* Remove the player from the read set until we have drained them: */
@@ -874,16 +911,26 @@ havechar(pp)
/* Suck their keypresses into a buffer: */
check_again:
- if ((pp->p_nchar = read(pp->p_fd, pp->p_cbuf, sizeof pp->p_cbuf)) <= 0)
- {
+ errno = 0;
+ ret = read(pp->p_fd, pp->p_cbuf, sizeof pp->p_cbuf);
+ if (ret == -1) {
if (errno == EINTR)
goto check_again;
- if (errno != EAGAIN) {
- log(LOG_INFO, "read");
- /* Assume their connection was lost/closed: */
- pp->p_cbuf[0] = 'q';
- pp->p_nchar = 1;
+ if (errno == EAGAIN) {
+#ifdef DEBUG
+ warn("Have_inp is wrong for %d", pp->p_fd);
+#endif
+ return FALSE;
}
+ log(LOG_INFO, "read");
+ }
+ if (ret > 0) {
+ /* Got some data */
+ pp->p_nchar = ret;
+ } else {
+ /* Connection was lost/closed: */
+ pp->p_cbuf[0] = 'q';
+ pp->p_nchar = 1;
}
/* Reset pointer into read buffer */
pp->p_ncount = 0;
@@ -931,8 +978,9 @@ send_stats()
FILE *fp;
int s;
struct sockaddr_in sockstruct;
- int socklen;
+ socklen_t socklen;
struct request_info ri;
+ int flags;
/* Accept a connection to the statistics socket: */
socklen = sizeof sockstruct;
@@ -953,6 +1001,11 @@ send_stats()
return;
}
+ /* Don't allow the writes to block: */
+ flags = fcntl(s, F_GETFL, 0);
+ flags |= O_NDELAY;
+ (void) fcntl(s, F_SETFL, flags);
+
fp = fdopen(s, "w");
if (fp == NULL) {
log(LOG_ERR, "fdopen");
@@ -1057,7 +1110,7 @@ static void
announce_game()
{
- /* Stub */
+ /* TODO: could use system() to do something user-configurable */
}
/*
@@ -1068,7 +1121,7 @@ handle_wkport(fd)
int fd;
{
struct sockaddr fromaddr;
- int fromlen;
+ socklen_t fromlen;
u_int16_t query;
u_int16_t response;
struct request_info ri;
@@ -1082,6 +1135,16 @@ handle_wkport(fd)
return;
}
+#ifdef DEBUG
+ fprintf(stderr, "query %d (%s) from %s:%d\n", query,
+ query == C_MESSAGE ? "C_MESSAGE" :
+ query == C_SCORES ? "C_SCORES" :
+ query == C_PLAYER ? "C_PLAYER" :
+ query == C_MONITOR ? "C_MONITOR" : "?",
+ inet_ntoa(((struct sockaddr_in *)&fromaddr)->sin_addr),
+ ntohs(((struct sockaddr_in *)&fromaddr)->sin_port));
+#endif
+
/* Do we allow access? */
if (hosts_access(&ri) == 0) {
logx(LOG_INFO, "rejected connection from %s", eval_client(&ri));
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 17:23:02 +0000