From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 21 Jul 2011 19:02:39 +0000 (+0100)
Subject: WIP dns packet en/decoding test program
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=c2ed2c844c48551c9a852f86b65ba8678ed93486;p=secnet.git

WIP dns packet en/decoding test program
---

diff --git a/dns-bitenc-test.c b/dns-bitenc-test.c
new file mode 100644
index 0000000..5d09cfb
--- /dev/null
+++ b/dns-bitenc-test.c
@@ -0,0 +1,65 @@
+#define NMYLABELS 3
+static const char *const mylabels[NMYLABELS]={"z","example","com"};
+static const char prefix[]="PREFIX ";
+static const char suffix[]=" SUFFIX";
+static uint8_t packet[100];
+
+static struct dnsbitenc enc;
+
+int main(int argc, const char **argv) {
+    const char **argv_save=
+    memcpy(packet+sizeof(packet)-sizeof(suffix), suffix, sizeof(suffix));
+    dnsbitenc_start(&enc, packet+sizeof(prefix),
+		    sizeof(packet)-sizeof(prefix)-sizeof(suffix));
+    for (;;) {
+	const char *arg = *++argv;
+	if (!strcmp(arg,"b")) {
+	    uint32_t val=strtoul(*++argv,0,0);
+	    int bits=atoi(*++argv);
+	    dnsbitenc_addbits(&enc,val,bits);
+	} else if (!strcmp(arg,"w")) {
+	    uint32_t val=strtoul(*++argv,0,0);
+	    dnsbitenc_addu32(&enc,val);
+	} else if (!strcmp(arg,"r")) {
+	    const char *rest=*++argv;
+	    int l=strlen(rest);
+	    int nofit=dnsbitenc_restbytes(&enc,rest,l);
+	    printf("FIT %.*s|%.*s\n",l-nofit,rest,nofit,rest+l-nofit);
+	    break;
+	} else {
+	    abort();
+	}
+    }
+    const uint8_t *encoded=dnsbitenc_getresult(&enc);
+    const uint8_t *pktbegin=encoded-sizeof(prefix);
+    memcpy(pktbegin,prefix,sizeof(prefix));
+
+    const uint8_t *pr;
+    for (pr=pktbegin; pr<packet+sizeof(packet); pr++)
+	printf("%02x",*pr);
+    printf("\n");
+
+    uint8_t domainend;
+    int r=dnsbitdec_start(&dec, pktbegin, packet+sizeof(packet),
+			  pktbegin+sizeof(prefix), NMYLABELS,mylabels,
+			  &domainend);
+    if (r) {
+	printf("DEC ERROR %d\n",r);
+	return 0;
+    }
+    argv=argv_save;
+    for (;;) {
+	const char *arg = *++argv;
+	if (!strcmp(arg,"b")) {
+	    ++argv;
+	    int bits=atoi(*++argv);
+	    uint32_t 
+
+	    if (nofit)
+		
+	    } else 
+
+	const int c0=*arg++;
+	switch (c0) {
+	case 'b':
+