Function rewrite_ruri

parser/msg_parser.c:1202–1359

}

int rewrite_ruri(struct sip_msg *msg, str *sval, int ival,
				enum rw_ruri_part part)
{
	int user = 0;
	char *tmp, *new_uri, *end, *crt;
	int len;
	struct sip_uri uri;

	if (msg->new_uri.s) {
		tmp=msg->new_uri.s;
		len=msg->new_uri.len;
	}else{
		tmp=msg->first_line.u.request.uri.s;
		len=msg->first_line.u.request.uri.len;
	}
	if (parse_uri(tmp, len, &uri)<0){
		LM_ERR("bad uri <%.*s>, dropping packet\n", len, tmp);
		return -1;
	}

	new_uri=pkg_malloc(MAX_URI_SIZE);
	if (new_uri==0){
		LM_ERR("memory allocation failure\n");
		return -1;
	}
	end=new_uri+MAX_URI_SIZE;
	crt=new_uri;
	/* begin copying */
	len = (uri.user.len?uri.user.s:uri.host.s) - tmp;
	if (crt+len>end) goto error;
	memcpy(crt,tmp,len);crt+=len;

	if (part==RW_RURI_PREFIX && sval->len) {
		if (crt+sval->len>end) goto error;
		memcpy( crt, sval->s, sval->len);
		crt+=sval->len;
		/* whatever we had before, with prefix we have username
		   now */
		user=1;
	}

	if ((part==RW_RURI_USER)||(part==RW_RURI_USERPASS)) {
		tmp=sval->s;
		len=sval->len;
	} else if (part==RW_RURI_STRIP) {
		if (ival>uri.user.len) {
			LM_WARN("too long strip asked; "
					" deleting username: %d of <%.*s>\n",
					ival, uri.user.len, uri.user.s);
			len=0;
		} else if (ival==uri.user.len) {
			len=0;
		} else {
			tmp=uri.user.s + ival;
			len=uri.user.len - ival;
		}
	} else if (part==RW_RURI_STRIP_TAIL) {
		if (ival>uri.user.len) {