1 files changed, 105 insertions, 0 deletions
diff --git a/libnet/src/libnet_build_hsrp.c b/libnet/src/libnet_build_hsrp.c
new file mode 100644
index 0000000..2c58dbb
--- /dev/null
+++ b/libnet/src/libnet_build_hsrp.c
@@ -0,0 +1,105 @@
+/*
+ *  libnet
+ *  libnet_build_hsrp.c - HSRP packet assembler
+ *
+ *  Copyright (c) 2004 David Barroso Berrueta <tomac@wasahero.org>
+ *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
+ *  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#if (HAVE_CONFIG_H)
+#include "../include/config.h"
+#endif
+#if (!(_WIN32) || (__CYGWIN__)) 
+#include "../include/libnet.h"
+#else
+#include "../include/win32/libnet.h"
+#endif
+
+libnet_ptag_t
+libnet_build_hsrp(u_int8_t version, u_int8_t opcode, u_int8_t state, 
+u_int8_t hello_time, u_int8_t hold_time, u_int8_t priority, u_int8_t group,
+u_int8_t reserved, u_int8_t authdata[HSRP_AUTHDATA_LENGTH], u_int32_t virtual_ip,
+u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
+{
+    u_int32_t n;
+    libnet_pblock_t *p;
+    struct libnet_hsrp_hdr hsrp_hdr;
+
+    if (l == NULL)
+    { 
+        return (-1);
+    } 
+
+    /*
+     *  Find the existing protocol block if a ptag is specified, or create
+     *  a new one.
+     */
+    p = libnet_pblock_probe(l, ptag, LIBNET_HSRP_H, LIBNET_PBLOCK_HSRP_H);
+    if (p == NULL)
+    {
+        return (-1);
+    }
+
+    memset(&hsrp_hdr, 0, sizeof(hsrp_hdr));
+    hsrp_hdr.version = version;
+    hsrp_hdr.opcode = opcode;
+    hsrp_hdr.state = state;
+    hsrp_hdr.hello_time = hello_time;
+    hsrp_hdr.hold_time = hold_time;
+    hsrp_hdr.priority = priority;
+    hsrp_hdr.group = group;
+    hsrp_hdr.reserved = reserved;
+    memcpy(hsrp_hdr.authdata, authdata, HSRP_AUTHDATA_LENGTH*sizeof(u_int8_t));
+    hsrp_hdr.virtual_ip = virtual_ip;
+
+    n = libnet_pblock_append(l, p, (u_int8_t *)&hsrp_hdr, LIBNET_HSRP_H);
+    if (n == -1)
+    {
+        goto bad;
+    }
+
+    if ((payload && !payload_s) || (!payload && payload_s))
+    {
+        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
+                "%s(): payload inconsistency\n", __func__);
+        goto bad;
+    }
+ 
+    if (payload && payload_s)
+    {
+        n = libnet_pblock_append(l, p, payload, payload_s);
+        if (n == -1)
+        {
+            goto bad;
+        }
+    }
+ 
+    return (ptag ? ptag : libnet_pblock_update(l, p, 0, LIBNET_PBLOCK_HSRP_H));
+bad:
+    libnet_pblock_delete(l, p);
+    return (-1);
+}
+/* EOF */