-#ifdef CONFIG_MCAST_TFTP
-/* Credits: atftp project.
- */
-
-/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
- * Frame:
- * +-------+-----------+---+-------~~-------+---+
- * | opc | multicast | 0 | addr, port, mc | 0 |
- * +-------+-----------+---+-------~~-------+---+
- * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
- * I am the new master-client so must send ACKs to DataBlocks. If I am not
- * master-client, I'm a passive client, gathering what DataBlocks I may and
- * making note of which ones I got in my bitmask.
- * In theory, I never go from master->passive..
- * .. this comes in with pkt already pointing just past opc
- */
-static void parse_multicast_oack(char *pkt, int len)
-{
- int i;
- IPaddr_t addr;
- char *mc_adr, *port, *mc;
-
- mc_adr = port = mc = NULL;
- /* march along looking for 'multicast\0', which has to start at least
- * 14 bytes back from the end.
- */
- for (i = 0; i < len-14; i++)
- if (strcmp(pkt+i, "multicast") == 0)
- break;
- if (i >= (len-14)) /* non-Multicast OACK, ign. */
- return;
-
- i += 10; /* strlen multicast */
- mc_adr = pkt+i;
- for (; i < len; i++) {
- if (*(pkt+i) == ',') {
- *(pkt+i) = '\0';
- if (port) {
- mc = pkt+i+1;
- break;
- } else {
- port = pkt+i+1;
- }
- }
- }
- if (!port || !mc_adr || !mc)
- return;
- if (Multicast && MasterClient) {
- printf("I got a OACK as master Client, WRONG!\n");
- return;
- }
- /* ..I now accept packets destined for this MCAST addr, port */
- if (!Multicast) {
- if (Bitmap) {
- printf("Internal failure! no mcast.\n");
- free(Bitmap);
- Bitmap = NULL;
- ProhibitMcast = 1;
- return ;
- }
- /* I malloc instead of pre-declare; so that if the file ends
- * up being too big for this bitmap I can retry
- */
- Bitmap = malloc(Mapsize);
- if (!Bitmap) {
- printf("No Bitmap, no multicast. Sorry.\n");
- ProhibitMcast = 1;
- return;
- }
- memset(Bitmap, 0, Mapsize);
- PrevBitmapHole = 0;
- Multicast = 1;
- }
- addr = string_to_ip(mc_adr);
- if (Mcast_addr != addr) {
- if (Mcast_addr)
- eth_mcast_join(Mcast_addr, 0);
- Mcast_addr = addr;
- if (eth_mcast_join(Mcast_addr, 1)) {
- printf("Fail to set mcast, revert to TFTP\n");
- ProhibitMcast = 1;
- mcast_cleanup();
- NetStartAgain();
- }
- }
- MasterClient = (unsigned char)simple_strtoul((char *)mc, NULL, 10);
- Mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
- printf("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
- return;
-}
-
-#endif /* Multicast TFTP */