resolve gcc 4.1 warning by changing ip_hash to a union

diff --git a/l2tpns.c b/l2tpns.c
index d70786b..515efc8 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.169 2006/07/01 12:40:17 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.170 2006/07/01 14:07:35 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -82,9 +82,13 @@ uint16_t MSS = 0;            // TCP MSS
 struct cli_session_actions *cli_session_actions = NULL;        // Pending session changes requested by CLI
 struct cli_tunnel_actions *cli_tunnel_actions = NULL;  // Pending tunnel changes required by CLI
 
-static void *ip_hash[256];     // Mapping from IP address to session structures.
+union iphash {
+       sessionidt sess;
+       union iphash *idx;
+} ip_hash[256];                        // Mapping from IP address to session structures.
+
 struct ipv6radix {
-       int sess;
+       sessionidt sess;
        struct ipv6radix *branch;
 } ipv6_hash[256];              // Mapping from IPv6 address to session structures.
 
@@ -189,9 +193,9 @@ struct Tstats *_statistics = NULL;
 struct Tringbuffer *ringbuffer = NULL;
 #endif
 
-static void cache_ipmap(in_addr_t ip, int s);
+static void cache_ipmap(in_addr_t ip, sessionidt s);
 static void uncache_ipmap(in_addr_t ip);
-static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s);
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s);
 static void free_ip_address(sessionidt s);
 static void dump_acct_info(int all);
 static void sighup_handler(int sig);
@@ -678,19 +682,19 @@ static void initudp(void)
 // IP address.
 //
 
-static int lookup_ipmap(in_addr_t ip)
+static sessionidt lookup_ipmap(in_addr_t ip)
 {
        uint8_t *a = (uint8_t *) &ip;
-       uint8_t **d = (uint8_t **) ip_hash;
+       union iphash *h = ip_hash;
 
-       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
-       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
-       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+       if (!(h = h[*a++].idx)) return 0;
+       if (!(h = h[*a++].idx)) return 0;
+       if (!(h = h[*a++].idx)) return 0;
 
-       return (int) (intptr_t) d[(size_t) *a];
+       return h[*a].sess;
 }
 
-static int lookup_ipv6map(struct in6_addr ip)
+static sessionidt lookup_ipv6map(struct in6_addr ip)
 {
        struct ipv6radix *curnode;
        int i;
@@ -718,18 +722,18 @@ static int lookup_ipv6map(struct in6_addr ip)
 
 sessionidt sessionbyip(in_addr_t ip)
 {
-       int s = lookup_ipmap(ip);
+       sessionidt s = lookup_ipmap(ip);
        CSTAT(sessionbyip);
 
        if (s > 0 && s < MAXSESSION && session[s].opened)
-               return (sessionidt) s;
+               return s;
 
        return 0;
 }
 
 sessionidt sessionbyipv6(struct in6_addr ip)
 {
-       int s;
+       sessionidt s;
        CSTAT(sessionbyipv6);
 
        if (!memcmp(&config->ipv6_prefix, &ip, 8) ||
@@ -755,25 +759,22 @@ sessionidt sessionbyipv6(struct in6_addr ip)
 //
 // (It's actually cached in network order)
 //
-static void cache_ipmap(in_addr_t ip, int s)
+static void cache_ipmap(in_addr_t ip, sessionidt s)
 {
        in_addr_t nip = htonl(ip);      // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
        uint8_t *a = (uint8_t *) &nip;
-       uint8_t **d = (uint8_t **) ip_hash;
+       union iphash *h = ip_hash;
        int i;
 
        for (i = 0; i < 3; i++)
        {
-               if (!d[(size_t) a[i]])
-               {
-                       if (!(d[(size_t) a[i]] = calloc(256, sizeof(void *))))
-                               return;
-               }
+               if (!(h[a[i]].idx || (h[a[i]].idx = calloc(256, sizeof(union iphash)))))
+                       return;
 
-               d = (uint8_t **) d[(size_t) a[i]];
+               h = h[a[i]].idx;
        }
 
-       d[(size_t) a[3]] = (uint8_t *) (intptr_t) s;
+       h[a[3]].sess = s;
 
        if (s > 0)
                LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
@@ -788,7 +789,7 @@ static void uncache_ipmap(in_addr_t ip)
        cache_ipmap(ip, 0);     // Assign it to the NULL session.
 }
 
-static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s)
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s)
 {
        int i;
        int bytes;
@@ -829,7 +830,7 @@ static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s)
 //
 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
 {
-       char **d = (char **) ip_hash, **e, **f, **g;
+       union iphash *d = ip_hash, *e, *f, *g;
        int i, j, k, l;
        int count = 0;
 
@@ -840,24 +841,28 @@ int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
 
        for (i = 0; i < 256; ++i)
        {
-               if (!d[i])
+               if (!d[i].idx)
                        continue;
-               e = (char **) d[i];
+
+               e = d[i].idx;
                for (j = 0; j < 256; ++j)
                {
-                       if (!e[j])
+                       if (!e[j].idx)
                                continue;
-                       f = (char **) e[j];
+
+                       f = e[j].idx;
                        for (k = 0; k < 256; ++k)
                        {
-                               if (!f[k])
+                               if (!f[k].idx)
                                        continue;
-                               g = (char **)f[k];
+
+                               g = f[k].idx;
                                for (l = 0; l < 256; ++l)
                                {
-                                       if (!g[l])
+                                       if (!g[l].sess)
                                                continue;
-                                       cli_print(cli, "%7d %d.%d.%d.%d", (int) (intptr_t) g[l], i, j, k, l);
+
+                                       cli_print(cli, "%7d %d.%d.%d.%d", g[l].sess, i, j, k, l);
                                        ++count;
                                }
                        }