Function fill_iface

tools/ipfw/ipfw2.c:3424–3455

* fill the interface structure. We do not check the name as we can * create interfaces dynamically, so checking them at insert time * makes relatively little sense. * Interface names containing '*', '?', or '[' are assumed to be shell * patterns which match interfaces. */

 * patterns which match interfaces.
 */
static void
fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
{
	char *p;
	uint16_t uidx;

	cmd->name[0] = '\0';
	cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);

	CHECK_CMDLEN;

	/* Parse the interface or address */
	if (strcmp(arg, "any") == 0)
		cmd->o.len = 0;		/* effectively ignore this command */
	else if (strncmp(arg, "table(", 6) == 0) {
		if ((p = strchr(arg + 6, ')')) == NULL)
			errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
		*p = '\0';
		p = strchr(arg + 6, ',');
		if (p)
			*p++ = '\0';
		if ((uidx = pack_table(tstate, arg + 6)) == 0)
			errx(EX_DATAERR, "Invalid table name: %s", arg + 6);

		cmd->name[0] = '\1'; /* Special value indicating table */
		cmd->p.kidx = uidx;
	} else if (!isdigit(*arg)) {
		strlcpy(cmd->name, arg, sizeof(cmd->name));
		cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
	} else if (!inet_aton(arg, &cmd->p.ip))
		errx(EX_DATAERR, "bad ip address ``%s''", arg);
}

static void
get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)