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$NetBSD: patch-ad,v 1.5 2015/12/29 04:04:30 dholland Exp $
--- netcat.c.orig 1996-03-21 01:38:04.000000000 +0100
+++ netcat.c 2011-01-13 16:06:00.000000000 +0100
@@ -44,12 +44,7 @@
#include <sys/select.h>
#endif
-/* have to do this *before* including types.h. xxx: Linux still has it wrong */
-#ifdef FD_SETSIZE /* should be in types.h, butcha never know. */
-#undef FD_SETSIZE /* if we ever need more than 16 active */
-#endif /* fd's, something is horribly wrong! */
-#define FD_SETSIZE 16 /* <-- this'll give us a long anyways, wtf */
-#include <sys/types.h> /* *now* do it. Sigh, this is broken */
+#include <sys/types.h>
#ifdef HAVE_RANDOM /* aficionados of ?rand48() should realize */
#define SRAND srandom /* that this doesn't need *strong* random */
@@ -151,6 +146,7 @@
/* global cmd flags: */
USHORT o_alla = 0;
+USHORT o_allowbroad = 0;
unsigned int o_interval = 0;
USHORT o_listen = 0;
USHORT o_nflag = 0;
@@ -160,6 +156,7 @@
USHORT o_verbose = 0;
unsigned int o_wait = 0;
USHORT o_zero = 0;
+int o_quit = -1; /* 0 == quit-now; >0 == quit after o_quit seconds */
/* o_tn in optional section */
/* Debug macro: squirt whatever message and sleep a bit so we can see it go
@@ -225,6 +222,14 @@
bail (" punt!");
}
+/* quit :
+ handler for a "-q" timeout (exit 0 instead of 1) */
+void quit()
+{
+ close(netfd);
+ exit(0);
+}
+
/* timeout and other signal handling cruft */
void tmtravel ()
{
@@ -333,6 +338,7 @@
struct in_addr iaddr;
register HINF * poop = NULL;
register int x;
+ int rc;
/* I really want to strangle the twit who dreamed up all these sockaddr and
hostent abstractions, and then forced them all to be incompatible with
@@ -361,9 +367,9 @@
bail ("gethostpoop fuxored");
strcpy (poop->name, unknown); /* preload it */
/* see wzv:workarounds.c for dg/ux return-a-struct inet_addr lossage */
- iaddr.s_addr = inet_addr (name);
+ rc = inet_aton(name, &iaddr);
- if (iaddr.s_addr == INADDR_NONE) { /* here's the great split: names... */
+ if (rc == 0) { /* here's the great split: names... */
if (numeric)
bail ("Can't parse %s as an IP address", name);
hostent = gethostbyname (name);
@@ -620,6 +626,13 @@
rr = setsockopt (nnetfd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof (x));
if (rr == -1)
holler ("nnetfd reuseaddr failed"); /* ??? */
+#ifdef SO_BROADCAST
+ if (o_allowbroad) {
+ rr = setsockopt (nnetfd, SOL_SOCKET, SO_BROADCAST, &x, sizeof (x));
+ if (rr == -1)
+ holler ("nnetfd reuseaddr failed"); /* ??? */
+ }
+#endif
#ifdef SO_REUSEPORT /* doesnt exist everywhere... */
rr = setsockopt (nnetfd, SOL_SOCKET, SO_REUSEPORT, &x, sizeof (x));
if (rr == -1)
@@ -1216,6 +1229,18 @@
if (rr <= 0) { /* at end, or fukt, or ... */
FD_CLR (0, ding1); /* disable and close stdin */
close (0);
+ /* if the user asked to exit on EOF, do it */
+ if (o_quit == 0) {
+ shutdown(netfd, 1);
+ close (fd);
+ exit (0);
+ }
+ /* if user asked to die after a while, arrange for it */
+ if (o_quit > 0) {
+ shutdown(netfd, 1);
+ signal (SIGALRM, quit);
+ alarm(o_quit);
+ }
} else {
rzleft = rr;
zp = bigbuf_in;
@@ -1314,10 +1339,6 @@
USHORT curport = 0;
char * randports = NULL;
-#ifdef HAVE_BIND
-/* can *you* say "cc -yaddayadda netcat.c -lresolv -l44bsd" on SunLOSs? */
- res_init();
-#endif
/* I was in this barbershop quartet in Skokie IL ... */
/* round up the usual suspects, i.e. malloc up all the stuff we need */
lclend = (SAI *) Hmalloc (sizeof (SA));
@@ -1354,7 +1375,8 @@
argv[1] = cp; /* head of new arg block */
fprintf (stderr, "Cmd line: ");
fflush (stderr); /* I dont care if it's unbuffered or not! */
- insaved = read (0, cp, BIGSIZ); /* we're gonna fake fgets() here */
+ insaved = read (0, cp, BIGSIZ-1); /* we're gonna fake fgets() here */
+ cp[BIGSIZ-1] = '\0';
if (insaved <= 0)
bail ("wrong");
x = findline (cp, insaved);
@@ -1389,12 +1411,14 @@
/* If your shitbox doesn't have getopt, step into the nineties already. */
/* optarg, optind = next-argv-component [i.e. flag arg]; optopt = last-char */
- while ((x = getopt (argc, argv, "ae:g:G:hi:lno:p:rs:tuvw:z")) != EOF) {
+ while ((x = getopt (argc, argv, "abe:g:G:hi:lno:p:q:rs:tuvw:z")) != EOF) {
/* Debug (("in go: x now %c, optarg %x optind %d", x, optarg, optind)) */
switch (x) {
case 'a':
bail ("all-A-records NIY");
o_alla++; break;
+ case 'b':
+ o_allowbroad++; break;
#ifdef GAPING_SECURITY_HOLE
case 'e': /* prog to exec */
pr00gie = optarg;
@@ -1443,6 +1467,8 @@
break;
case 'r': /* randomize various things */
o_random++; break;
+ case 'q': /* quit after stdin does EOF */
+ o_quit = atoi(optarg); break;
case 's': /* local source address */
/* do a full lookup [since everything else goes through the same mill],
unless -n was previously specified. In fact, careful placement of -n can
@@ -1642,6 +1668,7 @@
-e prog program to exec after connect [dangerous!!]");
#endif
holler ("\
+ -b allow broadcasts\n\
-g gateway source-routing hop point[s], up to 8\n\
-G num source-routing pointer: 4, 8, 12, ...\n\
-h this cruft\n\
@@ -1651,6 +1678,7 @@
-o file hex dump of traffic\n\
-p port local port number\n\
-r randomize local and remote ports\n\
+ -q secs quit after EOF on stdin and delay of secs\n\
-s addr local source address");
#ifdef TELNET
holler ("\
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