X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/fcbc59051841c6e76a6737acf8ccaac4afd98666..7f861e63553911e2d61c8a7ce8c16b8089446822:/secnet.c

diff --git a/secnet.c b/secnet.c
index 16fa198..7869182 100644
--- a/secnet.c
+++ b/secnet.c
@@ -1,5 +1,7 @@
 #include "secnet.h"
 #include <stdio.h>
+#include <assert.h>
+#include <limits.h>
 #include <string.h>
 #include <getopt.h>
 #include <errno.h>
@@ -30,13 +32,13 @@ struct poll_interest {
     beforepoll_fn *before;
     afterpoll_fn *after;
     void *state;
-    uint32_t max_nfds;
-    uint32_t nfds;
+    int32_t max_nfds;
+    int32_t nfds;
     cstring_t desc;
     struct poll_interest *next;
 };
 static struct poll_interest *reg=NULL;
-static uint32_t total_nfds=10;
+static int32_t total_nfds=10;
 
 static bool_t finished=False;
 
@@ -219,7 +221,7 @@ static void setup(dict_t *config)
 }
 
 void register_for_poll(void *st, beforepoll_fn *before,
-		       afterpoll_fn *after, uint32_t max_nfds, cstring_t desc)
+		       afterpoll_fn *after, int32_t max_nfds, cstring_t desc)
 {
     struct poll_interest *i;
 
@@ -230,6 +232,7 @@ void register_for_poll(void *st, beforepoll_fn *before,
     i->max_nfds=max_nfds;
     i->nfds=0;
     i->desc=desc;
+    assert(total_nfds < INT_MAX - max_nfds);
     total_nfds+=max_nfds;
     i->next=reg;
     reg=i;