Initial revision

cfg_parser.c

@@ -0,0 +1,126 @@
+/*
+ * $Id$
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "cfg_parser.h"
+#include "dprint.h"
+#include "parser_f.h"
+#include "route.h"
+
+
+
+
+/* params: null terminated text line => fills cl
+ * returns 0, or on error -1. */
+int cfg_parse_line(char* line, struct cfg_line* cl)
+{
+	/* format:
+		line = rule | comment
+		comment = SP* '#'.*
+		rule = SP* method_re SP* uri_re SP* ip_address comment?
+	*/
+
+	char* tmp;
+	char* end;
+
+	end=line+strlen(line);
+	tmp=eat_space(line, end-line);
+	if ((tmp==end)||(is_empty(tmp, end-tmp))) {
+		cl->type=CFG_EMPTY;
+		goto skip;
+	}
+	if (*tmp=='#'){
+		cl->type=CFG_COMMENT;
+		goto skip;
+	}
+	cl->method=tmp;
+	tmp=eat_token(cl->method,end-cl->method);
+	if (tmp==end) goto error;
+	printf("%d\n", tmp-line);
+	*tmp=0;
+	tmp++;
+	cl->uri=eat_space(tmp,end-tmp);
+	if (tmp==end) goto error;
+	tmp=eat_token(cl->uri,end-cl->uri);
+	if (tmp==end) goto error;
+	printf("%d\n", tmp-line);
+	*tmp=0;
+	tmp++;
+	cl->address=eat_space(tmp,end-tmp);
+	if (tmp==end) goto error;
+	tmp=eat_token(cl->address, end-cl->address);
+	printf("%d(%02x)\n", tmp-line, *tmp);
+	if (tmp<end) {
+		*tmp=0;
+		if (tmp+1<end){
+			if (!is_empty(tmp+1,end-tmp-1)){
+				printf("%d(%02x) e: %d\n", tmp-line, *tmp, end-line);
+				/* check if comment */
+				tmp=eat_space(tmp+1, end-tmp-1);
+				printf("%d(%02x) e: %d\n", tmp-line, *tmp, end-line);
+				if (*tmp!='#'){
+					/* extra chars at the end of line */
+					goto error;
+				}
+			}
+		}
+	}
+
+	cl->type=CFG_RULE;
+skip:
+	return 0;
+error:
+	cl->type=CFG_ERROR;
+	return -1;
+}
+
+
+
+/* parses the cfg, returns 0 on success, line no otherwise */
+int cfg_parse_stream(FILE* stream)
+{
+	int line;
+	struct cfg_line cl;
+	char buf[MAX_LINE_SIZE];
+	int ret;
+
+	line=1;
+	while(!feof(stream)){
+		if (fgets(buf, MAX_LINE_SIZE, stream)){
+			cfg_parse_line(buf, &cl);
+			switch (cl.type){
+				case CFG_RULE:
+					if ((ret=add_rule(&cl, &rlist))!=0){
+						DPrint("ERROR: could not compile rule at line %d\n",
+							line);
+						DPrint(" ----: add_rule returned %d\n", ret);
+						goto error;
+					}
+					break;
+				case CFG_COMMENT:
+				case CFG_SKIP:
+					break;
+				case CFG_ERROR:
+					DPrint("ERROR: bad config line (%d):%s\n", line, buf);
+					goto error;
+					break;
+			}
+			line++;
+		}else{
+			if (ferror(stream)){
+				DPrint("ERROR: reading configuration: %s\n", strerror(errno));
+				goto error;
+			}
+			break;
+		}
+	}
+	return 0;
+
+error:
+	return line;
+}
+

cfg_parser.h

@@ -0,0 +1,29 @@
+/*
+ * $Id$
+ */
+
+#ifndef  cfg_parser_h
+#define cfg_parser_h
+
+#include <stdio.h>
+
+#define CFG_EMPTY   0
+#define CFG_COMMENT 1
+#define CFG_SKIP    2
+#define CFG_RULE    3
+#define CFG_ERROR  -1
+
+#define MAX_LINE_SIZE 800
+
+struct cfg_line{
+	int type;
+	char* method;
+	char* uri;
+	char* address;
+};
+
+
+int cfg_parse_line(char* line, struct cfg_line* cl);
+int cfg_parse_stream(FILE* stream);
+
+#endif

dprint.c

@@ -0,0 +1,21 @@
+/*
+ * $Id$
+ *
+ * debug print 
+ *
+ */
+
+#include "dprint.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+
+void dprint(char * format, ...)
+{
+	va_list ap;
+
+	va_start(ap, format);
+	vfprintf(stderr,format,ap);
+	fflush(stderr);
+	va_end(ap);
+}

dprint.h

@@ -0,0 +1,20 @@
+/*
+ * $Id$
+ */
+
+
+#ifndef dprint_h
+#define dprint_h
+
+
+
+void dprint (char* format, ...);
+
+#ifdef NO_DEBUG
+	#define DPrint(fmt, args...)
+#else
+	#define DPrint(fmt,args...) dprint(fmt, ## args);
+#endif
+
+
+#endif /* ifndef dprint_h */

main.c

@@ -0,0 +1,51 @@
+/*
+ * $Id$
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include "dprint.h"
+#include "route.h"
+
+#define CFG_FILE "./sip_router.cfg"
+
+
+int main(int argc, char** argv)
+{
+
+	char * cfg_file;
+	FILE* cfg_stream;
+
+	cfg_file=CFG_FILE;
+
+	/* process command line (get port no, cfg. file path etc) */
+	/* ...*/
+
+	/* load config file or die */
+	cfg_stream=fopen (cfg_file, "r");
+	if (cfg_stream==0){
+		DPrint("ERROR: could not load config file: %s\n", strerror(errno));
+		goto error;
+	}
+
+	if (cfg_parse_stream(cfg_stream)!=0){
+		DPrint("ERROR: config parser failure\n");
+		goto error;
+	}
+
+
+	print_rl();
+
+
+
+	/* start other processes/threads ? */
+
+	/* receive loop */
+
+
+error:
+	return -1;
+
+}