Function extract_ftc_hdrs

parser/msg_parser.c:1422–1542

		state=1;\
	}while(0)
int extract_ftc_hdrs( char *buf, int len, str *from, str *to, str *cseq,str *callid)
{
	char *end, *p;
	char *b;
	str  *fill;
	int state;
	int flags;
	int flag;

	p = buf;
	end = buf+len;
	state = 1;
	b = 0;
	flags = ((from!=0)?0x1:0) | ((to!=0)?0x2:0) | ((cseq!=0)?0x4:0)
				| ((callid!=0)?0x8:0);
	flag = 0;
	fill = 0;

	LM_DBG("flags = %d\n",flags);

	while(p<end) {
		switch (*p) {
			case '\n':
			case '\r':
				switch (state) {
					case 4: state=5;break;
					case 5: state=6;break;
					case 6: if(!(*p=='\n' && *(p-1)=='\r')) SET_FOUND(1);break;
					default : state=2;break;
				}
				break;
			case ' ':
			case '\t':
				switch (state) {
					case 4: case 6: state=5; break;
					case 2: state=1; break;/*folded line*/
				}
				break;
			case ':':
				switch (state) {
					case 4:case 5: state=5;if(flag==0x04)GET_CSEQ();break;
					case 6: SET_FOUND(1);break;/*found*/
					case 2: state=1;break;
				}
				break;
			case 'f':
			case 'F':
				if (state==5) break;
				if (state==6) SET_FOUND(2);/*found*/;
				if (state!=2) {state = 1;break;}
				/* hdr starting with 'f' */
				if (from==0) break;
				b = p;
				if (p+3<end && LC(p+1)=='r' && LC(p+2)=='o' && LC(p+3)=='m')
					p+=3;
				state = 4; /* "f" or "from" found */
				fill = from;
				flag = 0x1;