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-rw-r--r--src/vnet/unix/pcap2pg.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/src/vnet/unix/pcap2pg.c b/src/vnet/unix/pcap2pg.c
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+++ b/src/vnet/unix/pcap2pg.c
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+/*
+ * pcap2pg.c: convert pcap input to pg input
+ *
+ * Copyright (c) 2013 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief Functions to convert PCAP file format to VPP PG (Packet Generator)
+ *
+ */
+#include <vnet/unix/pcap.h>
+#include <vnet/ethernet/packet.h>
+#include <stdio.h>
+
+pcap_main_t pcap_main;
+
+/**
+ * @brief char * to seed a PG file
+ */
+static char * pg_fmt =
+ "packet-generator new {\n"
+ " name s%d\n"
+ " limit 1\n"
+ " size %d-%d\n"
+ " node ethernet-input\n";
+
+
+/**
+ * @brief Packet Generator Stream boilerplate
+ *
+ * @param *ofp - FILE
+ * @param i - int
+ * @param *pkt - u8
+ */
+void stream_boilerplate (FILE *ofp, int i, u8 * pkt)
+{
+ fformat(ofp, pg_fmt, i, vec_len(pkt), vec_len(pkt));
+}
+
+/**
+ * @brief Conversion of PCAP file to PG file format
+ *
+ * @param *pm - pcap_main_t
+ * @param *ofp - FILE
+ *
+ * @return rc - int
+ *
+ */
+int pcap2pg (pcap_main_t * pm, FILE *ofp)
+{
+ int i, j;
+ u8 *pkt;
+
+ for (i = 0; i < vec_len (pm->packets_read); i++)
+ {
+ int offset;
+ ethernet_header_t * h;
+ u64 ethertype;
+
+ pkt = pm->packets_read[i];
+ h = (ethernet_header_t *)pkt;
+
+ stream_boilerplate (ofp, i, pkt);
+
+ fformat (ofp, " data {\n");
+
+ ethertype = clib_net_to_host_u16 (h->type);
+
+ /**
+ * In vnet terms, packet generator interfaces are not ethernets.
+ * They don't have vlan tables.
+ * This transforms captured 802.1q VLAN packets into
+ * regular Ethernet packets.
+ */
+ if (ethertype == 0x8100 /* 802.1q vlan */)
+ {
+ u16 * vlan_ethertype = (u16 *)(h+1);
+ ethertype = clib_net_to_host_u16(vlan_ethertype[0]);
+ offset = 18;
+ }
+ else
+ offset = 14;
+
+ fformat (ofp,
+ " 0x%04x: %02x%02x.%02x%02x.%02x%02x"
+ " -> %02x%02x.%02x%02x.%02x%02x\n",
+ ethertype,
+ h->src_address[0],
+ h->src_address[1],
+ h->src_address[2],
+ h->src_address[3],
+ h->src_address[4],
+ h->src_address[5],
+ h->dst_address[0],
+ h->dst_address[1],
+ h->dst_address[2],
+ h->dst_address[3],
+ h->dst_address[4],
+ h->dst_address[5]);
+
+ fformat (ofp, " hex 0x");
+
+ for (j = offset; j < vec_len (pkt); j++)
+ fformat (ofp, "%02x", pkt[j]);
+
+ fformat (ofp, " }\n");
+ fformat (ofp, "}\n\n");
+ }
+ return 0;
+}
+
+/**
+ * @brief pcap2pg.
+ * usage: pcap2pg -i <input-file> [-o <output-file>]
+ */
+int main (int argc, char **argv)
+{
+ unformat_input_t input;
+ pcap_main_t * pm = &pcap_main;
+ u8 * input_file = 0, * output_file = 0;
+ FILE * ofp;
+ clib_error_t * error;
+
+ unformat_init_command_line (&input, argv);
+
+ while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat(&input, "-i %s", &input_file)
+ || unformat (&input, "input %s", &input_file))
+ ;
+ else if (unformat (&input, "-o %s", &output_file)
+ || unformat (&input, "output %s", &output_file))
+ ;
+ else
+ {
+ usage:
+ fformat(stderr,
+ "usage: pcap2pg -i <input-file> [-o <output-file>]\n");
+ exit (1);
+ }
+ }
+
+ if (input_file == 0)
+ goto usage;
+
+ pm->file_name = (char *)input_file;
+ error = pcap_read (pm);
+
+ if (error)
+ {
+ clib_error_report (error);
+ exit (1);
+ }
+
+ if (output_file)
+ {
+ ofp = fopen ((char *)output_file, "rw");
+ if (ofp == NULL)
+ clib_unix_warning ("Couldn't create '%s'", output_file);
+ exit (1);
+ }
+ else
+ {
+ ofp = stdout;
+ }
+
+ pcap2pg (pm, ofp);
+
+ fclose (ofp);
+ exit (0);
+}