1 files changed, 116 insertions, 0 deletions
diff --git a/framework/src/suricata/src/util-proto-name.c b/framework/src/suricata/src/util-proto-name.c
new file mode 100644
index 00000000..0b958884
--- /dev/null
+++ b/framework/src/suricata/src/util-proto-name.c
@@ -0,0 +1,116 @@
+/* Copyright (C) 2007-2010 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * \file
+ *
+ * \author Gurvinder Singh <gurvindersinghdahiya@gmail.com>
+ *
+ * File to provide the protocol names based on protocol numbers defined in the
+ * specified protocol file.
+ */
+
+#include "suricata-common.h"
+#include "util-proto-name.h"
+
+static int init_once = 0;
+
+/**
+ *  \brief  Function to load the protocol names from the specified protocol
+ *          file.
+ */
+void SCProtoNameInit()
+{
+    BUG_ON(init_once);
+    init_once++;
+    memset(known_proto, 0x00, sizeof(known_proto));
+
+    /* Load the known protocols name from the /etc/protocols file */
+    FILE *fp = fopen(PROTO_FILE,"r");
+    if (fp != NULL) {
+        char line[200];
+        char *ptr = NULL;
+
+        while(fgets(line, sizeof(line), fp) != NULL) {
+            if (line[0] == '#')
+                continue;
+
+            char *name = strtok_r(line," \t", &ptr);
+            if (name == NULL)
+                continue;
+
+            char *proto_ch = strtok_r(NULL," \t", &ptr);
+            if (proto_ch == NULL)
+                continue;
+
+            int proto = atoi(proto_ch);
+            if (proto >= 255)
+                continue;
+
+            char *cname = strtok_r(NULL, " \t", &ptr);
+
+            if (known_proto[proto] != NULL) {
+                SCFree(known_proto[proto]);
+            }
+
+            if (cname != NULL) {
+                known_proto[proto] = SCStrdup(cname);
+            } else {
+                known_proto[proto] = SCStrdup(name);
+            }
+            if (unlikely(known_proto[proto] == NULL)) {
+                SCLogError(SC_ERR_MEM_ALLOC, "Failed proto name allocation");
+                continue;
+            }
+            int proto_len = strlen(known_proto[proto]);
+            if (proto_len > 0 && known_proto[proto][proto_len - 1] == '\n')
+                known_proto[proto][proto_len - 1] = '\0';
+        }
+        fclose(fp);
+    }
+}
+
+/**
+ * \brief   Function to check if the received protocol number is valid and do
+ *          we have corresponding name entry for this number or not.
+ *
+ * \param proto Protocol number to be validated
+ * \retval ret On success returns TRUE otherwise FALSE
+ */
+uint8_t SCProtoNameValid(uint16_t proto)
+{
+    uint8_t ret = FALSE;
+
+    if (proto <= 255 && known_proto[proto] != NULL) {
+        ret = TRUE;
+    }
+
+    return ret;
+}
+
+/**
+ *  \brief  Function to clears the memory used in storing the protocol names.
+ */
+void SCProtoNameDeInit()
+{
+    int cnt;
+    /* clears the memory of loaded protocol names */
+    for (cnt = 0; cnt < 255; cnt++) {
+        if (known_proto[cnt] != NULL)
+            SCFree(known_proto[cnt]);
+    }
+}