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pimd: PIM BSM Processing datastructure definition/initialization/deinit

Browse Source 
Apart from datastructure, bsm scope initialization and deinitialiation
routines called during pim instance init and deinit. Also makefile changes.

Signed-off-by: Saravanan K <saravanank@vmware.com>
This commit is contained in:
saravanank 2019-05-01 19:24:14 -07:00
parent e2d01c190d
commit 361b584394
9 changed files with 341 additions and 1 deletions
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122
pimd/pim_bsm.c Normal file
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@ -0,0 +1,122 @@
/*
* pim_bsm.c: PIM BSM handling routines
*
* Copyright (C) 2018-19 Vmware, Inc.
* Saravanan K
*
* 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 "if.h"
#include "pimd.h"
#include "pim_iface.h"
#include "pim_cmd.h"
#include "pim_instance.h"
#include "pim_rpf.h"
#include "pim_hello.h"
#include "pim_pim.h"
#include "pim_nht.h"
#include "pim_bsm.h"
#include "pim_time.h"
/* Functions forward declaration */
static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout);
static int pim_on_bs_timer(struct thread *t);
static void pim_bs_timer_stop(struct bsm_scope *scope);
static void pim_free_bsgrp_data(struct bsgrp_node * bsgrp_node)
{
if (bsgrp_node->bsrp_list)
list_delete(&bsgrp_node->bsrp_list);
if (bsgrp_node->partial_bsrp_list)
list_delete(&bsgrp_node->partial_bsrp_list);
XFREE(MTYPE_PIM_BSGRP_NODE, bsgrp_node);
}
static void pim_bsm_node_free(struct bsm_info *bsm)
{
if (bsm->bsm)
XFREE(MTYPE_PIM_BSM_PKT_VAR_MEM, bsm->bsm);
XFREE(MTYPE_PIM_BSM_INFO, bsm);
}
void pim_bsm_proc_init(struct pim_instance *pim)
{
memset(&pim->global_scope, 0, sizeof(struct bsm_scope));
pim->global_scope.sz_id = PIM_GBL_SZ_ID;
pim->global_scope.bsrp_table = route_table_init();
pim->global_scope.accept_nofwd_bsm = true;
pim->global_scope.state = NO_INFO;
pim->global_scope.pim = pim;
pim->global_scope.bsm_list = list_new();
pim->global_scope.bsm_list->del = (void (*)(void *))pim_bsm_node_free;
pim_bs_timer_start(&pim->global_scope, PIM_BS_TIME);
}
void pim_bsm_proc_free(struct pim_instance *pim)
{
struct route_node *rn;
struct bsgrp_node *bsgrp;
pim_bs_timer_stop(&pim->global_scope);
if (pim->global_scope.bsm_list)
list_delete(&pim->global_scope.bsm_list);
for(rn = route_top(pim->global_scope.bsrp_table);
rn; rn = route_next(rn)) {
bsgrp = rn->info;
if (!bsgrp)
continue;
pim_free_bsgrp_data(bsgrp);
}
if (pim->global_scope.bsrp_table)
route_table_finish(pim->global_scope.bsrp_table);
}
static int pim_on_bs_timer(struct thread *t)
{
return 0;
}
static void pim_bs_timer_stop(struct bsm_scope *scope)
{
if (PIM_DEBUG_BSM)
zlog_debug("%s : BS timer being stopped of sz: %d",
__PRETTY_FUNCTION__,
scope->sz_id);
THREAD_OFF(scope->bs_timer);
}
static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout)
{
if (!scope) {
if (PIM_DEBUG_BSM)
zlog_debug("%s : Invalid scope(NULL).",
__PRETTY_FUNCTION__);
}
THREAD_OFF(scope->bs_timer);
if (PIM_DEBUG_BSM)
zlog_debug("%s : starting bs timer for scope %d with timeout %d secs",
__PRETTY_FUNCTION__, scope->sz_id, bs_timeout);
thread_add_timer(router->master, pim_on_bs_timer, scope, bs_timeout,
&scope->bs_timer);
}

191
pimd/pim_bsm.h Normal file
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@ -0,0 +1,191 @@
/*
* pim_bsm.h: PIM BSM handling related
*
* Copyright (C) 2018-19 Vmware, Inc.
* Saravanan K
*
* 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
*/
#ifndef __PIM_BSM_H__
#define __PIM_BSM_H__
#include "if.h"
#include "vty.h"
#include "linklist.h"
#include "table.h"
#include "pim_rp.h"
#include "pim_msg.h"
/* Defines */
#define PIM_GBL_SZ_ID 0 /* global scope zone id set to 0 */
#define PIM_BS_TIME 60 /* RFC 5059 - Sec 5 */
#define PIM_BSR_DEFAULT_TIMEOUT 130 /* RFC 5059 - Sec 5 */
/* These structures are only encoded IPv4 specific */
#define PIM_BSM_HDR_LEN sizeof(struct bsm_hdr)
#define PIM_BSM_GRP_LEN sizeof(struct bsmmsg_grpinfo)
#define PIM_BSM_RP_LEN sizeof(struct bsmmsg_rpinfo)
#define PIM_MIN_BSM_LEN (PIM_HDR_LEN + \
PIM_BSM_HDR_LEN + \
PIM_BSM_GRP_LEN + \
PIM_BSM_RP_LEN)
/* Datastructures
* ==============
*/
/* Non candidate BSR states */
enum ncbsr_state{
NO_INFO = 0,
ACCEPT_ANY,
ACCEPT_PREFERRED
};
/* BSM scope - bsm processing is per scope */
struct bsm_scope {
int sz_id; /* scope zone id */
enum ncbsr_state state; /* non candidate BSR state */
bool accept_nofwd_bsm; /* no fwd bsm accepted for scope */
struct in_addr current_bsr; /* current elected BSR for the sz */
uint32_t current_bsr_prio; /* current BSR priority */
int64_t current_bsr_first_ts; /* current BSR elected time */
int64_t current_bsr_last_ts; /* Last BSM received from E-BSR */
uint16_t bsm_frag_tag; /* Last received frag tag from E-BSR */
uint8_t hashMasklen; /* Mask in hash calc RFC 7761 4.7.2 */
struct pim_instance *pim; /* Back pointer to pim instance */
struct list *bsm_list; /* list of bsm frag for frowarding */
struct route_table *bsrp_table; /* group2rp mapping rcvd from BSR */
struct thread *bs_timer; /* Boot strap timer */
struct thread *sz_timer;
};
/* BSM packet - this is stored as list in bsm_list inside scope
* This is used for forwarding to new neighbors or restarting mcast routers
*/
struct bsm_info {
uint32_t size; /* size of the packet */
unsigned char *bsm; /* Actual packet */
};
/* This is the group node of the bsrp table in scope.
* this node maintains the list of rp for the group.
*/
struct bsgrp_node {
struct prefix group; /* Group range */
struct bsm_scope *scope; /* Back ptr to scope */
struct list *bsrp_list; /* list of RPs adv by BSR */
struct list *partial_bsrp_list; /* maintained until all RPs received */
int pend_rp_cnt; /* Total RP - Received RP */
uint16_t frag_tag; /* frag tag to identify the fragment */
};
/* This is the list node of bsrp_list and partial bsrp list in
* bsgrp_node. Hold info of each RP received for the group
*/
struct bsm_rpinfo {
uint32_t hash; /* Hash Value as per RFC 7761 4.7.2 */
uint32_t elapse_time; /* upd at expiry of elected RP node */
uint16_t rp_prio; /* RP priority */
uint16_t rp_holdtime; /* RP holdtime - g2rp timer value */
struct in_addr rp_address; /* RP Address */
struct bsgrp_node *bsgrp_node; /* Back ptr to bsgrp_node */
struct thread *g2rp_timer; /* Run only for elected RP node */
};
/* Structures to extract Bootstrap Message header and Grp to RP Mappings
* =====================================================================
* BSM Format:
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |PIM Ver| Type |N| Reserved | Checksum | PIM HDR
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Fragment Tag | Hash Mask Len | BSR Priority | BS HDR(1)
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | BSR Address (Encoded-Unicast format) | BS HDR(2)
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Group Address 1 (Encoded-Group format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Count 1 | Frag RP Cnt 1 | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Address 1 (Encoded-Unicast format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP1 Holdtime | RP1 Priority | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Address 2 (Encoded-Unicast format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP2 Holdtime | RP2 Priority | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | . |
* | . |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Address m (Encoded-Unicast format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RPm Holdtime | RPm Priority | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Group Address 2 (Encoded-Group format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | . |
* | . |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Group Address n (Encoded-Group format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Count n | Frag RP Cnt n | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Address 1 (Encoded-Unicast format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP1 Holdtime | RP1 Priority | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Address 2 (Encoded-Unicast format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP2 Holdtime | RP2 Priority | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | . |
* | . |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RP Address m (Encoded-Unicast format) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RPm Holdtime | RPm Priority | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct bsm_hdr {
uint16_t frag_tag;
uint8_t hm_len;
uint8_t bsr_prio;
struct pim_encoded_ipv4_unicast bsr_addr;
}__attribute__((packed));
struct bsmmsg_grpinfo {
struct pim_encoded_group_ipv4 group;
uint8_t rp_count;
uint8_t frag_rp_count;
uint16_t reserved;
}__attribute__((packed));
struct bsmmsg_rpinfo {
struct pim_encoded_ipv4_unicast rpaddr;
uint16_t rp_holdtime;
uint8_t rp_pri;
uint8_t reserved;
}__attribute__((packed));
/* API */
void pim_bsm_proc_init(struct pim_instance *pim);
void pim_bsm_proc_free(struct pim_instance *pim);
#endif

2
pimd/pim_cmd.h
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@ -65,6 +65,8 @@
#define DEBUG_MSDP_INTERNAL_STR "MSDP protocol internal\n"
#define DEBUG_MSDP_PACKETS_STR "MSDP protocol packets\n"
#define DEBUG_MTRACE_STR "Mtrace protocol activity\n"
#define DEBUG_PIM_BSM_STR "BSR message processing activity\n"
void pim_cmd_init(void);

5
pimd/pim_instance.c
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@ -33,6 +33,7 @@
#include "pim_static.h"
#include "pim_ssmpingd.h"
#include "pim_vty.h"
#include "pim_bsm.h"
static void pim_instance_terminate(struct pim_instance *pim)
{
@ -50,6 +51,8 @@ static void pim_instance_terminate(struct pim_instance *pim)
pim_rp_free(pim);
pim_bsm_proc_free(pim);
/* Traverse and cleanup rpf_hash */
if (pim->rpf_hash) {
hash_clean(pim->rpf_hash, (void *)pim_rp_list_hash_clean);
@ -106,6 +109,8 @@ static struct pim_instance *pim_instance_init(struct vrf *vrf)
pim_rp_init(pim);
pim_bsm_proc_init(pim);
pim_oil_init(pim);
pim_upstream_init(pim);

6
pimd/pim_instance.h
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@ -26,6 +26,7 @@
#include "pim_str.h"
#include "pim_msdp.h"
#include "pim_assert.h"
#include "pim_bsm.h"
#include "pim_vxlan_instance.h"
#if defined(HAVE_LINUX_MROUTE_H)
@ -121,6 +122,11 @@ struct pim_instance {
bool ecmp_enable;
bool ecmp_rebalance_enable;
/* Bsm related */
struct bsm_scope global_scope;
uint64_t bsm_rcvd;
uint64_t bsm_sent;
uint64_t bsm_dropped;
/* If we need to rescan all our upstreams */
struct thread *rpf_cache_refresher;

4
pimd/pim_memory.c
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@ -53,3 +53,7 @@ DEFINE_MTYPE(PIMD, PIM_NEXTHOP_CACHE, "PIM nexthop cache state")
DEFINE_MTYPE(PIMD, PIM_SSM_INFO, "PIM SSM configuration")
DEFINE_MTYPE(PIMD, PIM_SPT_PLIST_NAME, "PIM SPT Prefix List Name")
DEFINE_MTYPE(PIMD, PIM_VXLAN_SG, "PIM VxLAN mroute cache")
DEFINE_MTYPE(PIMD, PIM_BSGRP_NODE, "PIM BSR advertised grp info")
DEFINE_MTYPE(PIMD, PIM_BSRP_NODE, "PIM BSR advertised RP info")
DEFINE_MTYPE(PIMD, PIM_BSM_INFO, "PIM BSM Info")
DEFINE_MTYPE(PIMD, PIM_BSM_PKT_VAR_MEM, "PIM BSM Packet")

4
pimd/pim_memory.h
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@ -52,5 +52,9 @@ DECLARE_MTYPE(PIM_NEXTHOP_CACHE)
DECLARE_MTYPE(PIM_SSM_INFO)
DECLARE_MTYPE(PIM_SPT_PLIST_NAME);
DECLARE_MTYPE(PIM_VXLAN_SG)
DECLARE_MTYPE(PIM_BSRP_NODE)
DECLARE_MTYPE(PIM_BSGRP_NODE)
DECLARE_MTYPE(PIM_BSM_INFO)
DECLARE_MTYPE(PIM_BSM_PKT_VAR_MEM)
#endif /* _QUAGGA_PIM_MEMORY_H */

6
pimd/pimd.h
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@ -114,6 +114,7 @@
#define PIM_MASK_PIM_NHT_RP (1 << 24)
#define PIM_MASK_MTRACE (1 << 25)
#define PIM_MASK_VXLAN (1 << 26)
#define PIM_MASK_BSM_PROC (1 << 27)
/* Remember 32 bits!!! */
/* PIM error codes */
@ -182,11 +183,12 @@ extern uint8_t qpim_ecmp_rebalance_enable;
#define PIM_DEBUG_PIM_NHT_RP (router->debugs & PIM_MASK_PIM_NHT_RP)
#define PIM_DEBUG_MTRACE (router->debugs & PIM_MASK_MTRACE)
#define PIM_DEBUG_VXLAN (router->debugs & PIM_MASK_VXLAN)
#define PIM_DEBUG_BSM (router->debugs & PIM_MASK_BSM_PROC)
#define PIM_DEBUG_EVENTS \
(router->debugs \
& (PIM_MASK_PIM_EVENTS | PIM_MASK_IGMP_EVENTS \
| PIM_MASK_MSDP_EVENTS))
| PIM_MASK_MSDP_EVENTS | PIM_MASK_BSM_PROC))
#define PIM_DEBUG_PACKETS \
(router->debugs \
& (PIM_MASK_PIM_PACKETS | PIM_MASK_IGMP_PACKETS \
@ -212,6 +214,7 @@ extern uint8_t qpim_ecmp_rebalance_enable;
#define PIM_DO_DEBUG_SSMPINGD (router->debugs |= PIM_MASK_SSMPINGD)
#define PIM_DO_DEBUG_MROUTE (router->debugs |= PIM_MASK_MROUTE)
#define PIM_DO_DEBUG_MROUTE_DETAIL (router->debugs |= PIM_MASK_MROUTE_DETAIL)
#define PIM_DO_DEBUG_BSM (router->debugs |= PIM_MASK_BSM_PROC)
#define PIM_DO_DEBUG_PIM_HELLO (router->debugs |= PIM_MASK_PIM_HELLO)
#define PIM_DO_DEBUG_PIM_J_P (router->debugs |= PIM_MASK_PIM_J_P)
#define PIM_DO_DEBUG_PIM_REG (router->debugs |= PIM_MASK_PIM_REG)
@ -253,6 +256,7 @@ extern uint8_t qpim_ecmp_rebalance_enable;
#define PIM_DONT_DEBUG_PIM_NHT_RP (router->debugs &= ~PIM_MASK_PIM_NHT_RP)
#define PIM_DONT_DEBUG_MTRACE (router->debugs &= ~PIM_MASK_MTRACE)
#define PIM_DONT_DEBUG_VXLAN (router->debugs &= ~PIM_MASK_VXLAN)
#define PIM_DONT_DEBUG_BSM (router->debugs &= ~PIM_MASK_BSM_PROC)
void pim_router_init(void);
void pim_router_terminate(void);

2
pimd/subdir.am
View File

@ -17,6 +17,7 @@ pimd_libpim_a_SOURCES = \
pimd/pim_assert.c \
pimd/pim_bfd.c \
pimd/pim_br.c \
pimd/pim_bsm.c \
pimd/pim_cmd.c \
pimd/pim_errors.c \
pimd/pim_hello.c \
@ -68,6 +69,7 @@ noinst_HEADERS += \
pimd/pim_assert.h \
pimd/pim_bfd.h \
pimd/pim_br.h \
pimd/pim_bsm.h \
pimd/pim_cmd.h \
pimd/pim_errors.h \
pimd/pim_hello.h \