moved gsm-receiver into directory - preparation to move to airprobe

1 files changed, 0 insertions, 206 deletions

diff --git a/src/lib/decoder/gsmstack.c b/src/lib/decoder/gsmstack.c
deleted file mode 100644
index c3f1921..0000000
--- a/src/lib/decoder/gsmstack.c
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
- * Invoke gsmstack() with any kind of burst. Automaticly decode and retrieve
- * information.
- */
-#include "system.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include "gsmstack.h"
-//#include "gsm_constants.h"
-#include "interleave.h"
-//#include "sch.h"
-#include "cch.h"
-
-static const int USEFUL_BITS = 142;
-
-//#include "out_pcap.h"
-enum BURST_TYPE {
-        UNKNOWN,
-        FCCH, 
-        PARTIAL_SCH,            //successful correlation, but missing data ^
-        SCH,
-        CTS_SCH,
-        COMPACT_SCH, 
-        NORMAL,
-        DUMMY,
-        ACCESS
-};
-static void out_gsmdecode(char type, int arfcn, int ts, int fn, char *data, int len);
-
-/* encode a decoded burst (1 bit per byte) into 8-bit-per-byte */
-static void burst_octify(unsigned char *dest, 
-			 const unsigned char *data, int length)
-{
-	int bitpos = 0;
-
-	while (bitpos < USEFUL_BITS) {
-		unsigned char tbyte;
-		int i; 
-
-		tbyte = 0;
-		for (i = 0; (i < 8) && (bitpos < length); i++) {
-			tbyte <<= 1;
-			tbyte |= data[bitpos++];
-		}
-		if (i < 8)
-			tbyte <<= 8 - i;
-		*dest++ = tbyte;
-	}	
-}
-
-
-#if 0
-static void
-diff_decode(char *dst, char *src, int len)
-{
-	const char *end = src + len;
-	unsigned char last;
-
-	src += 3;
-	last = 0;
-	memset(dst, 0, 3);
-	dst += 3;
-
-	while (src < end)
-	{
-		*dst = !*src ^ last;
-		last = *dst;
-		src++;
-		dst++;
-	}
-}
-#endif
-
-/*
- * Initialize a new GSMSTACK context.
- */
-int
-GS_new(GS_CTX *ctx)
-{
-	memset(ctx, 0, sizeof *ctx);
-	interleave_init(&ctx->interleave_ctx, 456, 114);
-	ctx->fn = -1;
-	ctx->bsic = -1;
-
-	ctx->tun_fd = mktun("gsm", ctx->ether_addr);
-	if (ctx->tun_fd < 0)
-		fprintf(stderr, "cannot open 'gsm' tun device, did you create it?\n");
-
-	ctx->pcap_fd = open_pcap_file("gsm-receiver.pcap");
-	if (ctx->pcap_fd < 0)
-		fprintf(stderr, "cannot open PCAP file: %s\n", strerror(errno));
-
-	ctx->burst_pcap_fd = open_pcap_file("gsm-receiver-burst.pcap");
-	if (ctx->burst_pcap_fd < 0)
-		fprintf(stderr, "cannot open burst PCAP file: %s\n", strerror(errno));
-
-	return 0;
-}
-
-#define BURST_BYTES	((USEFUL_BITS/8)+1)
-/*
- * 142 bit
- */
-int
-GS_process(GS_CTX *ctx, int ts, int type, const unsigned char *src, int fn)
-{
-// 	int fn;
-	int bsic;
-	int ret;
-	unsigned char *data;
-	int len;
-	struct gs_ts_ctx *ts_ctx = &ctx->ts_ctx[ts];
-	unsigned char octified[BURST_BYTES];
-
-	memset(ctx->msg, 0, sizeof(ctx->msg));
-
-	/* write burst to burst PCAP file */
-	burst_octify(octified, src, USEFUL_BITS);
-	write_pcap_packet(ctx->burst_pcap_fd, 0 /* arfcn */, ts, ctx->fn,
-			  1, type, octified, BURST_BYTES);
-	
-#if 0
-	if (ts != 0) {
-		/* non-0 timeslots should end up in PCAP */
-		data = decode_cch(ctx, ctx->burst, &len);
-		if (data == NULL)
-			return -1;
-//		write_pcap_packet(ctx->pcap_fd, 0 /* arfcn */, ts, ctx->fn, data, len);
-		return;
-	}
-#endif
-
-/*	if (ts == 0) {
-		if (type == SCH) {
-//			ret = decode_sch(src, &fn, &bsic);
-			if (ret != 0)
-				return 0;
-			if ((ctx->bsic > 0) && (bsic != ctx->bsic))
-				fprintf(stderr, "WARN: BSIC changed.\n");
-			//DEBUGF("FN %d, BSIC %d\n", fn, bsic);
-			ctx->fn = fn;
-			ctx->bsic = bsic;
-			/* Reset message concatenator */
-//			ts_ctx->burst_count = 0;
-//			return 0;
-//		}
-
-		/* If we did not get Frame Number yet then return */
-//		if (ctx->fn < 0)
-//			return 0;
-
-//		ctx->fn++;
-//	}
-        ctx->fn = fn;
-	if (type == NORMAL) {
-		/* Interested in these frame numbers (cch)
- 		 * 2-5, 12-15, 22-25, 23-35, 42-45
- 		 * 6-9, 16-19, 26-29, 36-39, 46-49
- 		 */
-		/* Copy content data into new array */
-		//DEBUGF("burst count %d\n", ctx->burst_count);
-		memcpy(ts_ctx->burst + (116 * ts_ctx->burst_count), src, 58);
-		memcpy(ts_ctx->burst + (116 * ts_ctx->burst_count) + 58, src + 58 + 26, 58);
-		ts_ctx->burst_count++;
-		/* Return if not enough bursts for a full gsm message */
-		if (ts_ctx->burst_count < 4)
-			return 0;
-
-		ts_ctx->burst_count = 0;
-		data = decode_cch(ctx, ts_ctx->burst, &len);
-		if (data == NULL) {
-			DEBUGF("cannot decode fnr=0x%08x ts=%d\n", ctx->fn, ts);
-			return -1;
-		}
-		//DEBUGF("OK TS %d, len %d\n", ts, len);
-
-		out_gsmdecode(0, 0, ts, ctx->fn - 4, data, len);
-		write_interface(ctx->tun_fd, data+1, len-1, ctx->ether_addr);
-		write_pcap_packet(ctx->pcap_fd, 0 /* arfcn */, ts, ctx->fn,
-				  0, NORMAL, data, len);
-#if 0
-		if (ctx->fn % 51 != 0) && ( (((ctx->fn % 51 + 5) % 10 == 0) || (((ctx->fn % 51) + 1) % 10 ==0) ) )
-			ready = 1;
-#endif
-		
-		return 0;
-	}
-}
-
-
-/*
- * Output data so that it can be parsed from gsmdeocde.
- */
-static void
-out_gsmdecode(char type, int arfcn, int ts, int fn, char *data, int len)
-{
-	char *end = data + len;
-
-	/* FIXME: speed this up by first printing into an array */
-	while (data < end)
-		printf(" %02.2x", (unsigned char)*data++);
-	printf("\n");
-	fflush(stdout);
-}