/*
- PIM for Quagga
- Copyright (C) 2008 Everton da Silva Marques
-
- This program 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 2 of the License, or
- (at your option) any later version.
-
- This program 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 this program; see the file COPYING; if not, write to the
- Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- MA 02110-1301 USA
-*/
+ * PIM for Quagga
+ * Copyright (C) 2008 Everton da Silva Marques
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
#include <zebra.h>
#include "pim_rp.h"
#include "pim_rpf.h"
#include "pim_register.h"
+#include "pim_jp_agg.h"
+#include "pim_oil.h"
-void pim_msg_build_header(uint8_t *pim_msg, int pim_msg_size,
+void pim_msg_build_header(uint8_t *pim_msg, size_t pim_msg_size,
uint8_t pim_msg_type)
{
- uint16_t checksum;
-
- zassert(pim_msg_size >= PIM_PIM_MIN_LEN);
-
- /*
- * Write header
- */
-
- *(uint8_t *) PIM_MSG_HDR_OFFSET_VERSION(pim_msg) = (PIM_PROTO_VERSION << 4) | pim_msg_type;
- *(uint8_t *) PIM_MSG_HDR_OFFSET_RESERVED(pim_msg) = 0;
-
- /*
- * Compute checksum
- */
-
- *(uint16_t *) PIM_MSG_HDR_OFFSET_CHECKSUM (pim_msg) = 0;
- /*
- * The checksum for Registers is done only on the first 8 bytes of the packet,
- * including the PIM header and the next 4 bytes, excluding the data packet portion
- */
- if (pim_msg_type == PIM_MSG_TYPE_REGISTER)
- checksum = in_cksum (pim_msg, PIM_MSG_REGISTER_LEN);
- else
- checksum = in_cksum (pim_msg, pim_msg_size);
-
- *(uint16_t *) PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg) = checksum;
+ struct pim_msg_header *header = (struct pim_msg_header *)pim_msg;
+
+ /*
+ * Write header
+ */
+ header->ver = PIM_PROTO_VERSION;
+ header->type = pim_msg_type;
+ header->reserved = 0;
+
+
+ header->checksum = 0;
+ /*
+ * The checksum for Registers is done only on the first 8 bytes of the
+ * packet,
+ * including the PIM header and the next 4 bytes, excluding the data
+ * packet portion
+ */
+ if (pim_msg_type == PIM_MSG_TYPE_REGISTER)
+ header->checksum = in_cksum(pim_msg, PIM_MSG_REGISTER_LEN);
+ else
+ header->checksum = in_cksum(pim_msg, pim_msg_size);
}
-uint8_t *pim_msg_addr_encode_ipv4_ucast(uint8_t *buf,
- int buf_size,
- struct in_addr addr)
+uint8_t *pim_msg_addr_encode_ipv4_ucast(uint8_t *buf, struct in_addr addr)
{
- const int ENCODED_IPV4_UCAST_SIZE = 6;
+ buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
+ buf[1] = '\0'; /* native encoding */
+ memcpy(buf + 2, &addr, sizeof(struct in_addr));
- if (buf_size < ENCODED_IPV4_UCAST_SIZE) {
- return 0;
- }
-
- buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
- buf[1] = '\0'; /* native encoding */
- memcpy(buf+2, &addr, sizeof(struct in_addr));
-
- return buf + ENCODED_IPV4_UCAST_SIZE;
+ return buf + PIM_ENCODED_IPV4_UCAST_SIZE;
}
-uint8_t *pim_msg_addr_encode_ipv4_group(uint8_t *buf,
- int buf_size,
- struct in_addr addr)
+uint8_t *pim_msg_addr_encode_ipv4_group(uint8_t *buf, struct in_addr addr)
{
- const int ENCODED_IPV4_GROUP_SIZE = 8;
-
- if (buf_size < ENCODED_IPV4_GROUP_SIZE) {
- return 0;
- }
-
- buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
- buf[1] = '\0'; /* native encoding */
- buf[2] = '\0'; /* reserved */
- buf[3] = 32; /* mask len */
- memcpy(buf+4, &addr, sizeof(struct in_addr));
+ buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
+ buf[1] = '\0'; /* native encoding */
+ buf[2] = '\0'; /* reserved */
+ buf[3] = 32; /* mask len */
+ memcpy(buf + 4, &addr, sizeof(struct in_addr));
- return buf + ENCODED_IPV4_GROUP_SIZE;
+ return buf + PIM_ENCODED_IPV4_GROUP_SIZE;
}
-uint8_t *
-pim_msg_addr_encode_ipv4_source(uint8_t *buf, int buf_size,
- struct in_addr addr, uint8_t bits)
+uint8_t *pim_msg_addr_encode_ipv4_source(uint8_t *buf, struct in_addr addr,
+ uint8_t bits)
{
- const int ENCODED_IPV4_SOURCE_SIZE = 8;
+ buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
+ buf[1] = '\0'; /* native encoding */
+ buf[2] = bits;
+ buf[3] = 32; /* mask len */
+ memcpy(buf + 4, &addr, sizeof(struct in_addr));
- if (buf_size < ENCODED_IPV4_SOURCE_SIZE) {
- return 0;
- }
-
- buf[0] = PIM_MSG_ADDRESS_FAMILY_IPV4; /* addr family */
- buf[1] = '\0'; /* native encoding */
- buf[2] = bits;
- buf[3] = 32; /* mask len */
- memcpy(buf+4, &addr, sizeof(struct in_addr));
-
- return buf + ENCODED_IPV4_SOURCE_SIZE;
+ return buf + PIM_ENCODED_IPV4_SOURCE_SIZE;
}
-int
-pim_msg_join_prune_encode (uint8_t *buf, int buf_size, int is_join,
- struct pim_upstream *up,
- struct in_addr upstream, int holdtime)
+/*
+ * For the given 'struct pim_jp_sources' list
+ * determine the size_t it would take up.
+ */
+size_t pim_msg_get_jp_group_size(struct list *sources)
{
- uint8_t *pim_msg = buf;
- uint8_t *pim_msg_curr = buf + PIM_MSG_HEADER_LEN;
- uint8_t *end = buf + buf_size;
- uint16_t *prunes = NULL;
- uint16_t *joins = NULL;
- struct in_addr stosend;
- uint8_t bits;
- int remain;
+ struct pim_jp_sources *js;
+ size_t size = 0;
- remain = end - pim_msg_curr;
- pim_msg_curr = pim_msg_addr_encode_ipv4_ucast (pim_msg_curr, buf_size - PIM_MSG_HEADER_LEN, upstream);
- if (!pim_msg_curr) {
- char dst_str[INET_ADDRSTRLEN];
- pim_inet4_dump("<dst?>", upstream, dst_str, sizeof(dst_str));
- zlog_warn("%s: failure encoding destination address %s: space left=%d",
- __PRETTY_FUNCTION__, dst_str, remain);
- return -3;
- }
+ if (!sources)
+ return 0;
- remain = end - pim_msg_curr;
- if (remain < 4) {
- zlog_warn("%s: group will not fit: space left=%d",
- __PRETTY_FUNCTION__, remain);
- return -4;
- }
+ size += sizeof(struct pim_encoded_group_ipv4);
+ size += 4; // Joined sources (2) + Pruned Sources (2)
- *pim_msg_curr = 0; /* reserved */
- ++pim_msg_curr;
- *pim_msg_curr = 1; /* number of groups */
- ++pim_msg_curr;
+ size += sizeof(struct pim_encoded_source_ipv4) * sources->count;
- *((uint16_t *) pim_msg_curr) = htons(holdtime);
- ++pim_msg_curr;
- ++pim_msg_curr;
+ js = listgetdata(listhead(sources));
+ if (js && js->up->sg.src.s_addr == INADDR_ANY && js->is_join) {
+ struct pim_upstream *child, *up;
+ struct listnode *up_node;
- remain = end - pim_msg_curr;
- pim_msg_curr = pim_msg_addr_encode_ipv4_group (pim_msg_curr, remain,
- up->sg.grp);
- if (!pim_msg_curr) {
- char group_str[INET_ADDRSTRLEN];
- pim_inet4_dump("<grp?>", up->sg.grp, group_str, sizeof(group_str));
- zlog_warn("%s: failure encoding group address %s: space left=%d",
- __PRETTY_FUNCTION__, group_str, remain);
- return -5;
- }
-
- remain = end - pim_msg_curr;
- if (remain < 4) {
- zlog_warn("%s: sources will not fit: space left=%d",
- __PRETTY_FUNCTION__, remain);
- return -6;
- }
-
- /* number of joined sources */
- joins = (uint16_t *)pim_msg_curr;
- *joins = htons(is_join ? 1 : 0);
- ++pim_msg_curr;
- ++pim_msg_curr;
-
- /* number of pruned sources */
- prunes = (uint16_t *)pim_msg_curr;
- *prunes = htons(is_join ? 0 : 1);
- ++pim_msg_curr;
- ++pim_msg_curr;
+ up = js->up;
+ if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug(
+ "%s: Considering (%s) children for (S,G,rpt) prune",
+ __PRETTY_FUNCTION__, up->sg_str);
+
+ for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, child)) {
+ if (child->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) {
+ if (!pim_rpf_is_same(&up->rpf, &child->rpf)) {
+ size += sizeof(
+ struct pim_encoded_source_ipv4);
+ PIM_UPSTREAM_FLAG_SET_SEND_SG_RPT_PRUNE(
+ child->flags);
+ if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug(
+ "%s: SPT Bit and RPF'(%s) != RPF'(S,G): Add Prune (%s,rpt) to compound message",
+ __PRETTY_FUNCTION__,
+ up->sg_str,
+ child->sg_str);
+ } else if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug(
+ "%s: SPT Bit and RPF'(%s) == RPF'(S,G): Not adding Prune for (%s,rpt)",
+ __PRETTY_FUNCTION__, up->sg_str,
+ child->sg_str);
+ } else if (pim_upstream_is_sg_rpt(child)) {
+ if (pim_upstream_empty_inherited_olist(child)) {
+ size += sizeof(
+ struct pim_encoded_source_ipv4);
+ PIM_UPSTREAM_FLAG_SET_SEND_SG_RPT_PRUNE(
+ child->flags);
+ if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug(
+ "%s: inherited_olist(%s,rpt) is NULL, Add Prune to compound message",
+ __PRETTY_FUNCTION__,
+ child->sg_str);
+ } else if (!pim_rpf_is_same(&up->rpf,
+ &child->rpf)) {
+ size += sizeof(
+ struct pim_encoded_source_ipv4);
+ PIM_UPSTREAM_FLAG_SET_SEND_SG_RPT_PRUNE(
+ child->flags);
+ if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug(
+ "%s: RPF'(%s) != RPF'(%s,rpt), Add Prune to compound message",
+ __PRETTY_FUNCTION__,
+ up->sg_str,
+ child->sg_str);
+ } else if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug(
+ "%s: RPF'(%s) == RPF'(%s,rpt), Do not add Prune to compound message",
+ __PRETTY_FUNCTION__, up->sg_str,
+ child->sg_str);
+ } else if (PIM_DEBUG_PIM_PACKETS)
+ zlog_debug("%s: SPT bit is not set for (%s)",
+ __PRETTY_FUNCTION__, child->sg_str);
+ }
+ }
+ return size;
+}
- remain = end - pim_msg_curr;
- if (up->sg.src.s_addr == INADDR_ANY)
- {
- struct pim_rpf *rpf = pim_rp_g (up->sg.grp);
- bits = PIM_ENCODE_SPARSE_BIT | PIM_ENCODE_WC_BIT | PIM_ENCODE_RPT_BIT;
- stosend = rpf->rpf_addr.u.prefix4;
- }
- else
- {
- bits = PIM_ENCODE_SPARSE_BIT;
- stosend = up->sg.src;
- }
- pim_msg_curr = pim_msg_addr_encode_ipv4_source (pim_msg_curr, remain, stosend, bits);
- if (!pim_msg_curr) {
- char source_str[INET_ADDRSTRLEN];
- pim_inet4_dump("<src?>", up->sg.src, source_str, sizeof(source_str));
- zlog_warn("%s: failure encoding source address %s: space left=%d",
- __PRETTY_FUNCTION__, source_str, remain);
- return -7;
- }
- remain = pim_msg_curr - pim_msg;
+size_t pim_msg_build_jp_groups(struct pim_jp_groups *grp,
+ struct pim_jp_agg_group *sgs, size_t size)
+{
+ struct listnode *node, *nnode;
+ struct pim_jp_sources *source;
+ struct pim_upstream *up = NULL;
+ struct in_addr stosend;
+ uint8_t bits;
+ uint8_t tgroups = 0;
+
+ memset(grp, 0, size);
+ pim_msg_addr_encode_ipv4_group((uint8_t *)&grp->g, sgs->group);
+
+ for (ALL_LIST_ELEMENTS(sgs->sources, node, nnode, source)) {
+ /* number of joined/pruned sources */
+ if (source->is_join)
+ grp->joins++;
+ else
+ grp->prunes++;
+
+ if (source->up->sg.src.s_addr == INADDR_ANY) {
+ struct pim_instance *pim = source->up->channel_oil->pim;
+ struct pim_rpf *rpf = pim_rp_g(pim, source->up->sg.grp);
+ bits = PIM_ENCODE_SPARSE_BIT | PIM_ENCODE_WC_BIT
+ | PIM_ENCODE_RPT_BIT;
+ stosend = rpf->rpf_addr.u.prefix4;
+ /* Only Send SGRpt in case of *,G Join */
+ if (source->is_join)
+ up = source->up;
+ } else {
+ bits = PIM_ENCODE_SPARSE_BIT;
+ stosend = source->up->sg.src;
+ }
- /*
- * This is not implemented correctly at this point in time
- * Make it stop.
- */
-#if 0
- if (up->sg.src.s_addr == INADDR_ANY)
- {
- struct pim_upstream *child;
- struct listnode *up_node;
- int send_prune = 0;
+ pim_msg_addr_encode_ipv4_source((uint8_t *)&grp->s[tgroups],
+ stosend, bits);
+ tgroups++;
+ }
- zlog_debug ("%s: Considering (%s) children for (S,G,rpt) prune",
- __PRETTY_FUNCTION__, up->sg_str);
- for (ALL_LIST_ELEMENTS_RO (up->sources, up_node, child))
- {
- if (child->sptbit == PIM_UPSTREAM_SPTBIT_TRUE)
- {
- if (!pim_rpf_is_same(&up->rpf, &child->rpf))
- {
- send_prune = 1;
- if (PIM_DEBUG_PIM_PACKETS)
- zlog_debug ("%s: SPT Bit and RPF'(%s) != RPF'(S,G): Add Prune (%s,rpt) to compound message",
- __PRETTY_FUNCTION__, up->sg_str, child->sg_str);
- }
- else
- if (PIM_DEBUG_PIM_PACKETS)
- zlog_debug ("%s: SPT Bit and RPF'(%s) == RPF'(S,G): Not adding Prune for (%s,rpt)",
- __PRETTY_FUNCTION__, up->sg_str, child->sg_str);
- }
- else if (pim_upstream_is_sg_rpt (child))
- {
- if (pim_upstream_empty_inherited_olist (child))
- {
- send_prune = 1;
- if (PIM_DEBUG_PIM_PACKETS)
- zlog_debug ("%s: inherited_olist(%s,rpt) is NULL, Add Prune to compound message",
- __PRETTY_FUNCTION__, child->sg_str);
+ if (up) {
+ struct pim_upstream *child;
+
+ for (ALL_LIST_ELEMENTS(up->sources, node, nnode, child)) {
+ if (PIM_UPSTREAM_FLAG_TEST_SEND_SG_RPT_PRUNE(
+ child->flags)) {
+ pim_msg_addr_encode_ipv4_source(
+ (uint8_t *)&grp->s[tgroups],
+ child->sg.src,
+ PIM_ENCODE_SPARSE_BIT
+ | PIM_ENCODE_RPT_BIT);
+ tgroups++;
+ PIM_UPSTREAM_FLAG_UNSET_SEND_SG_RPT_PRUNE(
+ child->flags);
+ grp->prunes++;
+ }
}
- else if (!pim_rpf_is_same (&up->rpf, &child->rpf))
- {
- send_prune = 1;
- if (PIM_DEBUG_PIM_PACKETS)
- zlog_debug ("%s: RPF'(%s) != RPF'(%s,rpt), Add Prune to compound message",
- __PRETTY_FUNCTION__, up->sg_str, child->sg_str);
- }
- else
- if (PIM_DEBUG_PIM_PACKETS)
- zlog_debug ("%s: RPF'(%s) == RPF'(%s,rpt), Do not add Prune to compound message",
- __PRETTY_FUNCTION__, up->sg_str, child->sg_str);
- }
- else
- if (PIM_DEBUG_PIM_PACKETS)
- zlog_debug ("%s: SPT bit is not set for (%s)",
- __PRETTY_FUNCTION__, child->sg_str);
- if (send_prune)
- {
- pim_msg_curr = pim_msg_addr_encode_ipv4_source (pim_msg_curr, remain,
- child->sg.src,
- PIM_ENCODE_SPARSE_BIT | PIM_ENCODE_RPT_BIT);
- remain = pim_msg_curr - pim_msg;
- *prunes = htons(ntohs(*prunes) + 1);
- send_prune = 0;
- }
}
- }
-#endif
- pim_msg_build_header (pim_msg, remain, PIM_MSG_TYPE_JOIN_PRUNE);
- return remain;
+ grp->joins = htons(grp->joins);
+ grp->prunes = htons(grp->prunes);
+
+ return size;
}
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