X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=slip.c;h=d8b32d8dbda79b5ad8ad4432be2adb4d3a166a10;hb=b85840f2aed63305094eca734f157a0f73d91273;hp=17b3c184899c2c68ab7bd6c7e3a5db4f492c7120;hpb=091433c62a7e2fdb12f60d2468c5f98b9603f429;p=secnet.git

diff --git a/slip.c b/slip.c
index 17b3c18..d8b32d8 100644
--- a/slip.c
+++ b/slip.c
@@ -127,7 +127,7 @@ static void slip_unstuff(struct slip *st, uint8_t *buf, uint32_t l)
 		}
 		st->buff->size=0;
 	    } else if (outputchr != OUTPUT_NOTHING) {
-		if (st->buff->size < st->buff->len) {
+		if (buf_remaining_space(st->buff)) {
 		    buf_append_uint8(st->buff,outputchr);
 		} else {
 		    Message(M_WARNING, "userv_afterpoll: dropping overlong"
@@ -262,7 +262,6 @@ static void userv_entry(void *sst)
     dup2(st->in,0);
     dup2(st->out,1);
 
-    /* XXX close all other fds */
     setsid();
     /* XXX We really should strdup() all of argv[] but because we'll just
        exit anyway if execvp() fails it doesn't seem worth bothering. */
@@ -273,10 +272,9 @@ static void userv_entry(void *sst)
 
 static void userv_invoke_userv(struct userv *st)
 {
-    struct userv_entry_rec *er;
+    struct userv_entry_rec er[1];
     int c_stdin[2];
     int c_stdout[2];
-    string_t addrs;
     string_t nets;
     string_t s;
     struct netlink_client *r;
@@ -292,8 +290,8 @@ static void userv_invoke_userv(struct userv *st)
     /* This is where we actually invoke userv - all the networks we'll
        be using should already have been registered. */
 
-    addrs=safe_malloc(512,"userv_invoke_userv:addrs");
-    snprintf(addrs,512,"%s,%s,%d,slip",
+    char addrs[512];
+    snprintf(addrs,sizeof(addrs),"%s,%s,%d,slip",
 	     ipaddr_to_string(st->slip.nl.local_address),
 	     ipaddr_to_string(st->slip.nl.secnet_address),st->slip.nl.mtu);
 
@@ -315,7 +313,6 @@ static void userv_invoke_userv(struct userv *st)
 	s=subnet_to_string(snets->list[i]);
 	strcat(nets,s);
 	strcat(nets,",");
-	free(s);
     }
     nets[strlen(nets)-1]=0;
     subnet_list_free(snets);
@@ -326,17 +323,11 @@ static void userv_invoke_userv(struct userv *st)
     st->slip.pending_esc=False;
 
     /* Invoke userv */
-    if (pipe(c_stdin)!=0) {
-	fatal_perror("userv_invoke_userv: pipe(c_stdin)");
-    }
-    if (pipe(c_stdout)!=0) {
-	fatal_perror("userv_invoke_userv: pipe(c_stdout)");
-    }
+    pipe_cloexec(c_stdin);
+    pipe_cloexec(c_stdout);
     st->txfd=c_stdin[1];
     st->rxfd=c_stdout[0];
 
-    er=safe_malloc(sizeof(*r),"userv_invoke_userv: er");
-
     er->in=c_stdin[0];
     er->out=c_stdout[1];
     /* The arguments are:
@@ -345,7 +336,8 @@ static void userv_invoke_userv(struct userv *st)
        service-name
        local-addr,secnet-addr,mtu,protocol
        route1,route2,... */
-    er->argv=safe_malloc(sizeof(*er->argv)*6,"userv_invoke_userv:argv");
+    const char *er_argv[6];
+    er->argv=er_argv;
     er->argv[0]=st->userv_path;
     er->argv[1]=st->service_user;
     er->argv[2]=st->service_name;
@@ -358,9 +350,6 @@ static void userv_invoke_userv(struct userv *st)
 			er, st, st->slip.nl.name);
     close(er->in);
     close(er->out);
-    free(er->argv);
-    free(er);
-    free(addrs);
     free(nets);
     Message(M_INFO,"%s: userv-ipif pid is %d\n",st->slip.nl.name,st->pid);
     /* Read a single character from the pipe to confirm userv-ipif is