add -F/fixchecksums to fix IP, TCP & UDP checksums

baigubulu · May 8, 2003 · 8c9daf9 · 8c9daf9
1 parent 5988b45
commit 8c9daf9
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Showing 3 changed files with 20 additions and 5 deletions.
diff --git a/man/tcpreplay.8 b/man/tcpreplay.8
@@ -1,4 +1,4 @@
-.\" $Id: tcpreplay.8,v 1.4 2003/05/07 22:32:35 aturner Exp $
+.\" $Id: tcpreplay.8,v 1.5 2003/05/08 03:30:52 aturner Exp $
 .TH TCPREPLAY 8
 .SH NAME
 tcpreplay \- replay packets from capture files
@@ -14,6 +14,8 @@ tcpreplay \- replay packets from capture files
 .B \-f
 .I config file
 ] [ 
+.B \-F
+] [
 .B \-I
 .I intf mac
 ] [
@@ -95,6 +97,9 @@ Option tokens are listed below next to the corresponding command-line flag.
 .B \-c or "cachefile"
 Specify the \fItcpprep cache\fR to use to process packets.
 .TP
+.B \-F or "fixchecksums"
+Fixes IP and TCP/UDP checksums in packets.  Auto-forced with -s or -u
+.TP
 .B \-h
 Prints help/usage
 .TP

diff --git a/tcpreplay.c b/tcpreplay.c
@@ -1,4 +1,4 @@
-/* $Id: tcpreplay.c,v 1.53 2003/05/07 17:45:38 aturner Exp $ */
+/* $Id: tcpreplay.c,v 1.54 2003/05/08 03:30:51 aturner Exp $ */
 
 #include "config.h"
 
@@ -77,10 +77,10 @@ main(int argc, char *argv[])
 
 #ifdef DEBUG
     while ((ch =
-	    getopt(argc, argv, "d:c:C:f:hi:I:j:J:l:m:Mp:Pr:Rs:u:Vvx:X:?2:")) != -1)
+	    getopt(argc, argv, "d:c:C:f:Fhi:I:j:J:l:m:Mp:Pr:Rs:u:Vvx:X:?2:")) != -1)
 #else
     while ((ch =
-	    getopt(argc, argv, "c:C:f:hi:I:j:J:l:m:Mp:Pr:Rs:u:Vvx:X:?2:")) != -1)
+	    getopt(argc, argv, "c:C:f:Fhi:I:j:J:l:m:Mp:Pr:Rs:u:Vvx:X:?2:")) != -1)
 #endif
 	switch (ch) {
 	case 'c':		/* cache file */
@@ -100,6 +100,9 @@ main(int argc, char *argv[])
 	case 'f':		/* config file */
 	    configfile(optarg);
 	    break;
+	case 'F':               /* force fixing checksums */
+	    options.fixchecksums = 1;
+	    break;
 	case 'i':		/* interface */
 	    intf = optarg;
 	    break;
@@ -155,6 +158,7 @@ main(int argc, char *argv[])
 	    break;
 	case 's':
 	    options.seed = atoi(optarg);
+	    options.fixchecksums = 0; /* untruncating already does this */
 	    break;
 	case 'v':		/* verbose */
 	    options.verbose++;
@@ -169,6 +173,7 @@ main(int argc, char *argv[])
 	    else {
 		errx(1, "Invalid untruncate option: %s", optarg);
 	    }
+	    options.fixchecksums = 0; /* untruncating already does this */
 	    break;
 	case 'V':
 	    version();
@@ -512,6 +517,9 @@ configfile(char *file)
 	else if (ARGS("no_martians", 1)) {
 	    options.no_martians = 1;
 	}
+	else if (ARGS("fixchecksums", 1)) {
+	    options.fixchecksums = 1;
+	}
 	else if (ARGS("rate", 2)) {
 	    options.rate = atof(argv[1]);
 	    if (options.rate <= 0)
@@ -605,6 +613,7 @@ usage()
     fprintf(stderr, "-d <level>\t\tEnable debug output to STDERR\n");
 #endif
     fprintf(stderr, "-f <configfile>\t\tSpecify configuration file\n"
+	    "-F\t\t\tFix IP, TCP and UDP checksums\n"
 	    "-h\t\t\tHelp\n"
 	    "-i <nic>\t\tPrimary interface to send traffic out of\n"
 	    "-I <mac>\t\tRewrite dest MAC on primary interface\n"

diff --git a/tcpreplay.h b/tcpreplay.h
@@ -1,4 +1,4 @@
-/* $Id: tcpreplay.h,v 1.31 2003/05/07 22:33:30 aturner Exp $ */
+/* $Id: tcpreplay.h,v 1.32 2003/05/08 03:30:51 aturner Exp $ */
 
 #ifndef _TCPREPLAY_H_
 #define _TCPREPLAY_H_
@@ -40,6 +40,7 @@ struct options {
     int verbose;
     int no_martians;
     int topspeed;
+    int fixchecksums;
     int cidr;
     int trunc;
     long int seed;