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- /* $Id$ */
- /*
- * Copyright (c) 2001-2010 Aaron Turner <aturner at synfin dot net>
- * Copyright (c) 2013-2024 Fred Klassen <tcpreplay at appneta dot com> - AppNeta
- *
- * The Tcpreplay Suite of tools is free software: you can redistribute it
- * and/or modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or with the authors permission any later version.
- *
- * The Tcpreplay Suite is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with the Tcpreplay Suite. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "mac.h"
- #include "config.h"
- #include "common.h"
- #include <ctype.h>
- #include <stdlib.h>
- #include <string.h>
- /**
- * converts a string representation of a MAC address, based on
- * non-portable ether_aton()
- */
- void
- mac2hex(const char *mac, u_char *dst, int len)
- {
- int i;
- char *pp;
- if (len < 6)
- return;
- while (isspace(*mac))
- mac++;
- /* expect 6 hex octets separated by ':' or space/NUL if last octet */
- for (i = 0; i < 6; i++) {
- long l = strtol(mac, &pp, 16);
- if (pp == mac || l > 0xFF || l < 0)
- return;
- if (!(*pp == ':' || (i == 5 && (isspace(*pp) || *pp == '\0'))))
- return;
- dst[i] = (u_char)l;
- mac = pp + 1;
- }
- }
- /**
- * converts a string representation of TWO MAC addresses, which
- * are comma deliminated into two hex values. Either *first or *second
- * can be NULL if there is nothing before or after the comma.
- * returns:
- * 1 = first mac
- * 2 = second mac
- * 3 = both mac's
- * 0 = none
- */
- int
- dualmac2hex(const char *dualmac, u_char *first, u_char *second, int len)
- {
- char *tok = NULL, *temp, *string;
- int ret = 0;
- string = safe_strdup(dualmac);
- /* if we've only got a comma, then return NULL's */
- if (len <= 1)
- goto done;
- temp = strtok_r(string, ",", &tok);
- if (strlen(temp)) {
- mac2hex(temp, first, len);
- ret = 1;
- }
- temp = strtok_r(NULL, ",", &tok);
- /* temp is null if no comma */
- if (temp != NULL) {
- if (strlen(temp)) {
- mac2hex(temp, second, len);
- ret += 2;
- }
- }
- done:
- safe_free(string);
- return ret;
- }
- /**
- * Figures out if a MAC is listed in a comma delimited
- * string of MAC addresses.
- * returns TCPR_DIR_C2S if listed
- * returns TCPR_DIR_S2C if not listed
- */
- tcpr_dir_t
- macinstring(const char *macstring, const u_char *mac)
- {
- char *tok = NULL, *tempstr, *ourstring;
- u_char tempmac[6];
- int len = 6, ret = TCPR_DIR_S2C;
- ourstring = safe_strdup(macstring);
- memset(&tempmac[0], 0, sizeof(tempmac));
- tempstr = strtok_r(ourstring, ",", &tok);
- if (tempstr != NULL && strlen(tempstr)) {
- mac2hex(tempstr, tempmac, len);
- if (memcmp(mac, tempmac, len) == 0) {
- dbgx(3, "Packet matches: " MAC_FORMAT " sending out primary.\n", MAC_STR(tempmac));
- ret = TCPR_DIR_C2S;
- goto EXIT_MACINSTRING;
- }
- } else {
- goto EXIT_MACINSTRING;
- }
- while ((tempstr = strtok_r(NULL, ",", &tok)) != NULL) {
- mac2hex(tempstr, tempmac, len);
- if (memcmp(mac, tempmac, len) == 0) {
- ret = TCPR_DIR_C2S;
- dbgx(3, "Packet matches: " MAC_FORMAT " sending out primary.\n", MAC_STR(tempmac));
- goto EXIT_MACINSTRING;
- }
- }
- EXIT_MACINSTRING:
- safe_free(ourstring);
- #ifdef DEBUG
- if (ret == TCPR_DIR_S2C)
- dbg(3, "Packet doesn't match any MAC addresses sending out secondary.\n");
- #endif
- return ret;
- }
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