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Annotation of embedaddon/quagga/pimd/pim_oil.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:   PIM for Quagga
                      3:   Copyright (C) 2008  Everton da Silva Marques
                      4: 
                      5:   This program is free software; you can redistribute it and/or modify
                      6:   it under the terms of the GNU General Public License as published by
                      7:   the Free Software Foundation; either version 2 of the License, or
                      8:   (at your option) any later version.
                      9: 
                     10:   This program is distributed in the hope that it will be useful, but
                     11:   WITHOUT ANY WARRANTY; without even the implied warranty of
                     12:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     13:   General Public License for more details.
                     14:   
                     15:   You should have received a copy of the GNU General Public License
                     16:   along with this program; see the file COPYING; if not, write to the
                     17:   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
                     18:   MA 02110-1301 USA
                     19:   
                     20:   $QuaggaId: $Format:%an, %ai, %h$ $
                     21: */
                     22: 
                     23: #include <zebra.h>
                     24: 
                     25: #include "log.h"
                     26: #include "memory.h"
                     27: #include "linklist.h"
                     28: 
                     29: #include "pimd.h"
                     30: #include "pim_oil.h"
                     31: #include "pim_str.h"
                     32: #include "pim_iface.h"
                     33: 
                     34: void pim_channel_oil_free(struct channel_oil *c_oil)
                     35: {
                     36:   XFREE(MTYPE_PIM_CHANNEL_OIL, c_oil);
                     37: }
                     38: 
                     39: static void pim_channel_oil_delete(struct channel_oil *c_oil)
                     40: {
                     41:   /*
                     42:     notice that listnode_delete() can't be moved
                     43:     into pim_channel_oil_free() because the later is
                     44:     called by list_delete_all_node()
                     45:   */
                     46:   listnode_delete(qpim_channel_oil_list, c_oil);
                     47: 
                     48:   pim_channel_oil_free(c_oil);
                     49: }
                     50: 
                     51: static struct channel_oil *channel_oil_new(struct in_addr group_addr,
                     52:                                           struct in_addr source_addr,
                     53:                                           int input_vif_index)
                     54: {
                     55:   struct channel_oil *c_oil;
                     56:   struct interface *ifp_in;
                     57: 
                     58:   ifp_in = pim_if_find_by_vif_index(input_vif_index);
                     59:   if (!ifp_in) {
                     60:     /* warning only */
                     61:     char group_str[100]; 
                     62:     char source_str[100];
                     63:     pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str));
                     64:     pim_inet4_dump("<source?>", source_addr, source_str, sizeof(source_str));
                     65:     zlog_warn("%s: (S,G)=(%s,%s) could not find input interface for input_vif_index=%d",
                     66:              __PRETTY_FUNCTION__,
                     67:              source_str, group_str, input_vif_index);
                     68:   }
                     69: 
                     70:   c_oil = XCALLOC(MTYPE_PIM_CHANNEL_OIL, sizeof(*c_oil));
                     71:   if (!c_oil) {
                     72:     zlog_err("PIM XCALLOC(%zu) failure", sizeof(*c_oil));
                     73:     return 0;
                     74:   }
                     75: 
                     76:   c_oil->oil.mfcc_mcastgrp = group_addr;
                     77:   c_oil->oil.mfcc_origin   = source_addr;
                     78:   c_oil->oil.mfcc_parent   = input_vif_index;
                     79:   c_oil->oil_ref_count     = 1;
                     80: 
                     81:   zassert(c_oil->oil_size == 0);
                     82: 
                     83:   return c_oil;
                     84: }
                     85: 
                     86: static struct channel_oil *pim_add_channel_oil(struct in_addr group_addr,
                     87:                                               struct in_addr source_addr,
                     88:                                               int input_vif_index)
                     89: {
                     90:   struct channel_oil *c_oil;
                     91: 
                     92:   c_oil = channel_oil_new(group_addr, source_addr, input_vif_index);
                     93:   if (!c_oil) {
                     94:     zlog_warn("PIM XCALLOC(%zu) failure", sizeof(*c_oil));
                     95:     return 0;
                     96:   }
                     97: 
                     98:   listnode_add(qpim_channel_oil_list, c_oil);
                     99: 
                    100:   return c_oil;
                    101: }
                    102: 
                    103: static struct channel_oil *pim_find_channel_oil(struct in_addr group_addr,
                    104:                                                struct in_addr source_addr)
                    105: {
                    106:   struct listnode    *node;
                    107:   struct channel_oil *c_oil;
                    108: 
                    109:   for (ALL_LIST_ELEMENTS_RO(qpim_channel_oil_list, node, c_oil)) {
                    110:     if ((group_addr.s_addr == c_oil->oil.mfcc_mcastgrp.s_addr) &&
                    111:        (source_addr.s_addr == c_oil->oil.mfcc_origin.s_addr))
                    112:       return c_oil;
                    113:   }
                    114:   
                    115:   return 0;
                    116: }
                    117: 
                    118: struct channel_oil *pim_channel_oil_add(struct in_addr group_addr,
                    119:                                        struct in_addr source_addr,
                    120:                                        int input_vif_index)
                    121: {
                    122:   struct channel_oil *c_oil;
                    123: 
                    124:   c_oil = pim_find_channel_oil(group_addr, source_addr);
                    125:   if (c_oil) {
                    126:     ++c_oil->oil_ref_count;
                    127:     return c_oil;
                    128:   }
                    129: 
                    130:   return pim_add_channel_oil(group_addr, source_addr, input_vif_index);
                    131: }
                    132: 
                    133: void pim_channel_oil_del(struct channel_oil *c_oil)
                    134: {
                    135:   --c_oil->oil_ref_count;
                    136: 
                    137:   if (c_oil->oil_ref_count < 1) {
                    138:     pim_channel_oil_delete(c_oil);
                    139:   }
                    140: }