Changeset 781cf2c

Timestamp:

07/21/04 10:01:04 (17 years ago)

Author:

Daniel Lawson <dlawson@…>

Branches:

4.0.1-hotfixes, cachetimestamps, develop, dpdk-ndag, etsilive, getfragoff, help, libtrace4, master, ndag_format, pfring, rc-4.0.1, rc-4.0.2, rc-4.0.3, rc-4.0.4, ringdecrementfix, ringperformance, ringtimestampfixes

Children:

be54c88

Parents:

750a1e0

Message:

normal / wdcap ipchksum test
getopt

File:

• examples/protocol/protocol.c (modified) (3 diffs)

examples/protocol/protocol.c

@@ -33 +33 @@
 #include <netdb.h>
 #include "dagformat.h"
+#include <getopt.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <errno.h>
+
+#include <linux/types.h>
+#include <linux/linkage.h>
+#define  access_ok(type,addr,size) 1
+#include <asm/checksum.h>
+#define  IN_CHKSUM(IP)  ip_fast_csum((unsigned char *)(IP), 5)
 
 #include "libtrace.h"
@@ -40 +52 @@
 
 char *buffer[4096];
+uint64_t badchksum = 0;
+char *uri = 0;
+char *filterstring = 0;
 
-int main(int argc, char *argv[]) {
+int do_cksum = 0;
+int do_w_cksum = 0;
+static void usage();
+static void parse_cmdline(int argc, char **argv);
 
-        char *hostname = "rtclient:chasm.cs.waikato.ac.nz";
-        char *filterstring = 0;
+int main(int argc, char **argv) {
+
         struct libtrace_ip *ipptr = 0;
         
         int status; // need to pass to rtclient_read_packet
         int psize;
-        if (argc == 2) {
-                hostname = argv[1];
-        }
-        if (argc == 3) {
-                hostname = argv[1];
-                filterstring = argv[2];
-        }
+
+        parse_cmdline(argc,argv);
 
         // create an rtclient to hostname, on the default port
-        trace = create_trace(hostname);
+        trace = create_trace(uri);
         if (filterstring) {
                 filter = libtrace_bpf_setfilter(filterstring);
@@ -74 +87 @@
                 }
                 ipptr = get_ip(trace,buffer,4096);
-                if (ipptr) {
-                        printf("%d:%d\n",ipptr->ip_p,get_link_type(trace,buffer,4096));
+
+                if(do_cksum && IN_CHKSUM(ipptr)) {
+                        badchksum ++;
+                } else if (do_w_cksum && ipptr->ip_sum) {
+                        badchksum ++;
+                } else {
+                        if (ipptr) {
+                                printf("%d:%d\n",ipptr->ip_p,get_link_type(trace,buffer,4096));
+                        }
                 }
         }
+        if (do_cksum || do_w_cksum) {
+                printf("Bad checksums seen: %llu\n",badchksum);
+        }
         destroy_trace(trace);
         return 0;
 }
+
+
+static void usage(char *prog) {
+        printf("usage: %s [-h] [-c | -w] [-u <uri>] [-f <filterstring>]\n",prog);
+        printf("        -h              this help message\n");
+        printf("        -c              perform ip checksum test\n");
+        printf("        -w              check WDCAPd ip checksum value\n");
+        printf("        -u uri          uri to connect to\n");
+        printf("        -f filterstring BPF filterstring to apply\n");
+        printf("\n");
+        printf(" The use of -c and -w are exclusive: -c is used for normal traces, while -w applies to traces taken from the Waikato Capture point\n");
+}
+
+static void parse_cmdline(int argc, char **argv){
+        int opt;
+        if (argc == 1) {
+                usage(argv[0]);
+                exit(0);
+        }
+        
+        while ((opt = getopt(argc,argv, "hcwu:f:")) != EOF) {
+                switch(opt) {
+                        case 'h':
+                                usage(argv[0]);
+                                exit(0);
+                        case 'c':
+                                do_cksum = 1;
+                                break;
+                        case 'w':
+                                do_w_cksum = 1;
+                                break;
+                        case 'u':
+                                uri = strdup(optarg);
+                                break;
+                        case 'f':
+                                filterstring = strdup(optarg);
+                                break;
+                        default:
+                                usage(argv[0]);
+                                exit(0);
+                }
+
+        }
+
+        if (do_cksum && do_w_cksum) {
+                usage(argv[0]);
+                exit(0);
+        }
+
+}