diff options
| author | Guy Harris <guy@alum.mit.edu> | 2004-03-09 20:08:26 +0000 |
|---|---|---|
| committer | Guy Harris <guy@alum.mit.edu> | 2004-03-09 20:08:26 +0000 |
| commit | c4cffcaf46233f435a56d6db2ec7ca06e6611ce9 (patch) | |
| tree | a5080e832a4808141633c8ba070c008dfe74d5b5 /packet-netflow.c | |
| parent | 3e663fbb8538d60aa6d6db97c7c586167c79330e (diff) | |
Dynamically allocate the array of field entries in a NetFlow V9
template, rather than allocating a fixed table of 64 entries (and
possibly overflowing that table).
Clear out the hash table of template entries, freeing all the allocated
arrays, when a new capture is opened.
svn path=/trunk/; revision=10356
Diffstat (limited to 'packet-netflow.c')
| -rw-r--r-- | packet-netflow.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/packet-netflow.c b/packet-netflow.c index 8f80491150..a802dbeb9b 100644 --- a/packet-netflow.c +++ b/packet-netflow.c @@ -45,7 +45,7 @@ ** http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/netflsol/nfwhite.htm ** ** $Yahoo: //depot/fumerola/packet-netflow/packet-netflow.c#14 $ - ** $Id: packet-netflow.c,v 1.10 2003/03/07 00:43:30 guy Exp $ + ** $Id: packet-netflow.c,v 1.11 2004/03/09 20:08:26 guy Exp $ */ #ifdef HAVE_CONFIG_H @@ -122,7 +122,6 @@ static const value_string v8_agg[] = { }; /* Version 9 template cache structures */ -#define V9TEMPLATE_MAX_ENTRIES 64 #define V9TEMPLATE_CACHE_MAX_ENTRIES 100 struct v9_template_entry { @@ -136,7 +135,7 @@ struct v9_template { guint32 length; guint32 source_id; guint32 source_addr; - struct v9_template_entry entries[V9TEMPLATE_MAX_ENTRIES]; + struct v9_template_entry *entries; }; static struct v9_template v9_template_cache[V9TEMPLATE_CACHE_MAX_ENTRIES]; @@ -1160,6 +1159,7 @@ dissect_v9_template(proto_tree * pdutree, tvbuff_t * tvb, int offset) template.count = count; template.source_addr = 0; /* XXX */ template.source_id = 0; /* XXX */ + template.entries = g_malloc(count * sizeof(struct v9_template_entry)); tvb_memcpy(tvb, (guint8 *)template.entries, offset, count * sizeof(struct v9_template_entry)); v9_template_add(&template); @@ -1368,6 +1368,22 @@ getprefix(const guint32 * address, int prefix) return (ip_to_str((const guint8 *)&gprefix)); } + +static void +netflow_reinit(void) +{ + int i; + + /* + * Clear out the template cache. + * Free the table of fields for each entry, and then zero out + * the cache. + */ + for (i = 0; i < V9TEMPLATE_CACHE_MAX_ENTRIES; i++) + g_free(v9_template_cache[i].entries); + memset(v9_template_cache, 0, sizeof v9_template_cache); +} + void proto_register_netflow(void) { @@ -1709,7 +1725,7 @@ proto_register_netflow(void) "NetFlow UDP Port", "Set the port for NetFlow messages", 10, &global_netflow_udp_port); - register_dissector("cflow", dissect_netflow, proto_netflow); + register_init_routine(&netflow_reinit); } |