From 243dfe93fe122b82d349fa39cffed7cef57add3b Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 11 Dec 2011 12:05:16 +0000
Subject: [PATCH 1/1] "changes" to udp.c found on chiark

chiark:~secnet/secnet-0.1.16 contained this code.  This looks like a
mixture of old stuff and authbind htons change.

changeset generated by checking out v0.1.16 and doing this:

diff --exclude={.git,Makefile,autom4te.cache,conffile.{tab,yy}.{c,h},config.{h,h.in,log,status},stamp-h,version.c} --exclude=\*{.d,.orig,~} -ruN . ../secnet-0.1.16-chiark |patch -p1
---
 udp.c | 34 ++++++++++++----------------------
 1 file changed, 12 insertions(+), 22 deletions(-)

diff --git a/udp.c b/udp.c
index 9615a17..add7d8d 100644
--- a/udp.c
+++ b/udp.c
@@ -36,7 +36,6 @@ struct udp {
     closure_t cl;
     struct comm_if ops;
     struct cloc loc;
-    uint32_t addr;
     uint16_t port;
     int fd;
     string_t authbind;
@@ -183,7 +182,7 @@ static void udp_phase_hook(void *sst, uint32_t new_phase)
     struct udp *st=sst;
     struct sockaddr_in addr;
 
-    st->fd=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    st->fd=socket(AF_INET, SOCK_DGRAM, 0);
     if (st->fd<0) {
 	fatal_perror("udp (%s:%d): socket",st->loc.file,st->loc.line);
     }
@@ -198,7 +197,6 @@ static void udp_phase_hook(void *sst, uint32_t new_phase)
 
     memset(&addr, 0, sizeof(addr));
     addr.sin_family=AF_INET;
-    addr.sin_addr.s_addr=htonl(st->addr);
     addr.sin_port=htons(st->port);
     if (st->authbind) {
 	pid_t c;
@@ -211,29 +209,23 @@ static void udp_phase_hook(void *sst, uint32_t new_phase)
 	    fatal_perror("udp_phase_hook: fork() for authbind");
 	}
 	if (c==0) {
-	    char *argv[4], addrstr[9], portstr[5];
-	    sprintf(addrstr,"%08lX",(long)st->addr);
-	    sprintf(portstr,"%04X",st->port);
+	    char *argv[4];
 	    argv[0]=st->authbind;
-	    argv[1]=addrstr;
-	    argv[2]=portstr;
+	    argv[1]=strdup("00000000");
+	    if (!argv[1]) exit(ENOMEM);
+	    argv[2]=alloca(8);
+	    if (!argv[2]) exit(ENOMEM);
+	    sprintf(argv[2],"%04X",htons(st->port));
 	    argv[3]=NULL;
 	    dup2(st->fd,0);
 	    execvp(st->authbind,argv);
-	    _exit(255);
+	    exit(ENOEXEC);
 	}
-	while (waitpid(c,&status,0)==-1) {
-	    if (errno==EINTR) continue;
+	waitpid(c,&status,0);
+	if (WEXITSTATUS(status)!=0) {
+	    errno=WEXITSTATUS(status);
 	    fatal_perror("udp (%s:%d): authbind",st->loc.file,st->loc.line);
 	}
-	if (WIFSIGNALED(status)) {
-	    fatal("udp (%s:%d): authbind died on signal %d",st->loc.file,
-		  st->loc.line, WTERMSIG(status));
-	}
-	if (WIFEXITED(status) && WEXITSTATUS(status)!=0) {
-	    fatal("udp (%s:%d): authbind died with status %d",st->loc.file,
-		  st->loc.line, WEXITSTATUS(status));
-	}
     } else {
 	if (bind(st->fd, (struct sockaddr *)&addr, sizeof(addr))!=0) {
 	    fatal_perror("udp (%s:%d): bind",st->loc.file,st->loc.line);
@@ -247,7 +239,7 @@ static list_t *udp_apply(closure_t *self, struct cloc loc, dict_t *context,
 			 list_t *args)
 {
     struct udp *st;
-    item_t *i,*j;
+    item_t *i;
     dict_t *d;
     list_t *l;
     uint32_t a;
@@ -273,8 +265,6 @@ static list_t *udp_apply(closure_t *self, struct cloc loc, dict_t *context,
     }
     d=i->data.dict;
 
-    j=dict_find_item(d,"address",False,"udp",st->loc);
-    st->addr=j?st->addr=string_item_to_ipaddr(j, "udp"):INADDR_ANY;
     st->port=dict_read_number(d,"port",True,"udp",st->loc,0);
     st->rbuf=find_cl_if(d,"buffer",CL_BUFFER,True,"udp",st->loc);
     st->authbind=dict_read_string(d,"authbind",False,"udp",st->loc);
-- 
2.30.2