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pim_igmp.h
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PIM for Quagga
* Copyright (C) 2008 Everton da Silva Marques
*/
#ifndef PIM_IGMP_H
#define PIM_IGMP_H
#include <netinet/in.h>
#include <zebra.h>
#include "vty.h"
#include "linklist.h"
#include "pim_igmp_stats.h"
#include "pim_str.h"
/*
The following sizes are likely to support
any message sent within local MTU.
*/
#define PIM_IGMP_BUFSIZE_READ (20000)
#define PIM_IGMP_BUFSIZE_WRITE (20000)
#define PIM_IGMP_MEMBERSHIP_QUERY (0x11)
#define PIM_IGMP_V1_MEMBERSHIP_REPORT (0x12)
#define PIM_IGMP_V2_MEMBERSHIP_REPORT (0x16)
#define PIM_IGMP_V2_LEAVE_GROUP (0x17)
#define PIM_IGMP_MTRACE_RESPONSE (0x1E)
#define PIM_IGMP_MTRACE_QUERY_REQUEST (0x1F)
#define PIM_IGMP_V3_MEMBERSHIP_REPORT (0x22)
#define IGMP_V3_REPORT_HEADER_SIZE (8)
#define IGMP_V3_GROUP_RECORD_MIN_SIZE (8)
#define IGMP_V3_MSG_MIN_SIZE \
(IGMP_V3_REPORT_HEADER_SIZE + IGMP_V3_GROUP_RECORD_MIN_SIZE)
#define IGMP_V12_MSG_SIZE (8)
#define IGMP_V3_GROUP_RECORD_TYPE_OFFSET (0)
#define IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET (1)
#define IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET (2)
#define IGMP_V3_GROUP_RECORD_GROUP_OFFSET (4)
#define IGMP_V3_GROUP_RECORD_SOURCE_OFFSET (8)
#define IGMP_CHECKSUM_OFFSET (2)
#define IGMP_DEFAULT_VERSION (3)
#define IGMP_GET_INT16(ptr, output) \
do { \
output = *(ptr) << 8; \
output |= *((ptr) + 1); \
} while (0)
struct gm_join {
pim_addr group_addr;
pim_addr source_addr;
int sock_fd;
time_t sock_creation;
};
struct static_group {
pim_addr group_addr;
pim_addr source_addr;
struct channel_oil *oilp;
};
struct gm_sock {
int fd;
struct interface *interface;
pim_addr ifaddr;
time_t sock_creation;
struct event *t_igmp_read; /* read: IGMP sockets */
/* timer: issue IGMP general queries */
struct event *t_igmp_query_timer;
struct event *t_other_querier_timer; /* timer: other querier present */
pim_addr querier_addr; /* IP address of the querier */
int querier_query_interval; /* QQI */
int querier_robustness_variable; /* QRV */
int startup_query_count;
bool mtrace_only;
struct igmp_stats igmp_stats;
};
struct pim_interface;
#if PIM_IPV == 4
void pim_igmp_if_init(struct pim_interface *pim_ifp, struct interface *ifp);
void pim_igmp_if_reset(struct pim_interface *pim_ifp);
void pim_igmp_if_fini(struct pim_interface *pim_ifp);
struct gm_sock *pim_igmp_sock_lookup_ifaddr(struct list *igmp_sock_list,
struct in_addr ifaddr);
struct gm_sock *pim_igmp_sock_add(struct list *igmp_sock_list,
struct in_addr ifaddr, struct interface *ifp,
bool mtrace_only);
void igmp_sock_delete(struct gm_sock *igmp);
void igmp_sock_free(struct gm_sock *igmp);
void igmp_sock_delete_all(struct interface *ifp);
int pim_igmp_packet(struct gm_sock *igmp, char *buf, size_t len);
bool pim_igmp_verify_header(struct ip *ip_hdr, size_t len, size_t *ip_hlen);
void pim_igmp_general_query_on(struct gm_sock *igmp);
void pim_igmp_general_query_off(struct gm_sock *igmp);
void pim_igmp_other_querier_timer_on(struct gm_sock *igmp);
void pim_igmp_other_querier_timer_off(struct gm_sock *igmp);
int igmp_validate_checksum(char *igmp_msg, int igmp_msg_len);
#else /* PIM_IPV != 4 */
static inline void pim_igmp_if_init(struct pim_interface *pim_ifp,
struct interface *ifp)
{
}
static inline void pim_igmp_if_fini(struct pim_interface *pim_ifp)
{
}
static inline void pim_igmp_general_query_on(struct gm_sock *igmp)
{
}
static inline void pim_igmp_general_query_off(struct gm_sock *igmp)
{
}
static inline void pim_igmp_other_querier_timer_on(struct gm_sock *igmp)
{
}
static inline void pim_igmp_other_querier_timer_off(struct gm_sock *igmp)
{
}
#endif /* PIM_IPV == 4 */
#define IGMP_SOURCE_MASK_FORWARDING (1 << 0)
#define IGMP_SOURCE_MASK_DELETE (1 << 1)
#define IGMP_SOURCE_MASK_SEND (1 << 2)
#define IGMP_SOURCE_TEST_FORWARDING(flags) ((flags) & IGMP_SOURCE_MASK_FORWARDING)
#define IGMP_SOURCE_TEST_DELETE(flags) ((flags) & IGMP_SOURCE_MASK_DELETE)
#define IGMP_SOURCE_TEST_SEND(flags) ((flags) & IGMP_SOURCE_MASK_SEND)
#define IGMP_SOURCE_DO_FORWARDING(flags) ((flags) |= IGMP_SOURCE_MASK_FORWARDING)
#define IGMP_SOURCE_DO_DELETE(flags) ((flags) |= IGMP_SOURCE_MASK_DELETE)
#define IGMP_SOURCE_DO_SEND(flags) ((flags) |= IGMP_SOURCE_MASK_SEND)
#define IGMP_SOURCE_DONT_FORWARDING(flags) ((flags) &= ~IGMP_SOURCE_MASK_FORWARDING)
#define IGMP_SOURCE_DONT_DELETE(flags) ((flags) &= ~IGMP_SOURCE_MASK_DELETE)
#define IGMP_SOURCE_DONT_SEND(flags) ((flags) &= ~IGMP_SOURCE_MASK_SEND)
struct gm_source {
pim_addr source_addr;
struct event *t_source_timer;
struct gm_group *source_group; /* back pointer */
time_t source_creation;
uint32_t source_flags;
struct channel_oil *source_channel_oil;
/*
RFC 3376: 6.6.3.2. Building and Sending Group and Source Specific
Queries
*/
int source_query_retransmit_count;
};
struct gm_group {
/*
RFC 3376: 6.2.2. Definition of Group Timers
The group timer is only used when a group is in EXCLUDE mode and it
represents the time for the *filter-mode* of the group to expire and
switch to INCLUDE mode.
*/
struct event *t_group_timer;
/* Shared between group-specific and
group-and-source-specific retransmissions */
struct event *t_group_query_retransmit_timer;
/* Counter exclusive for group-specific retransmissions
(not used by group-and-source-specific retransmissions,
since sources have their counters) */
int group_specific_query_retransmit_count;
/* compatibility mode - igmp v1, v2 or v3 */
int igmp_version;
pim_addr group_addr;
int group_filtermode_isexcl; /* 0=INCLUDE, 1=EXCLUDE */
struct list *group_source_list; /* list of struct gm_source */
time_t group_creation;
struct interface *interface;
int64_t last_igmp_v1_report_dsec;
int64_t last_igmp_v2_report_dsec;
};
#if PIM_IPV == 4
struct pim_instance;
void igmp_anysource_forward_start(struct pim_instance *pim,
struct gm_group *group);
void igmp_anysource_forward_stop(struct gm_group *group);
void igmp_source_forward_start(struct pim_instance *pim,
struct gm_source *source);
void igmp_source_forward_stop(struct gm_source *source);
void igmp_source_forward_reevaluate_all(struct pim_instance *pim);
struct gm_group *find_group_by_addr(struct gm_sock *igmp,
struct in_addr group_addr);
struct gm_group *igmp_add_group_by_addr(struct gm_sock *igmp,
struct in_addr group_addr);
struct gm_source *igmp_get_source_by_addr(struct gm_group *group,
struct in_addr src_addr,
bool *created);
void igmp_group_delete_empty_include(struct gm_group *group);
void igmp_startup_mode_on(struct gm_sock *igmp);
void igmp_group_timer_on(struct gm_group *group, long interval_msec,
const char *ifname);
void igmp_send_query(int igmp_version, struct gm_group *group, char *query_buf,
int query_buf_size, int num_sources,
struct in_addr dst_addr, struct in_addr group_addr,
int query_max_response_time_dsec, uint8_t s_flag,
struct gm_sock *igmp);
void igmp_group_delete(struct gm_group *group);
void igmp_send_query_on_intf(struct interface *ifp, int igmp_ver);
#else /* PIM_IPV != 4 */
static inline void igmp_startup_mode_on(struct gm_sock *igmp)
{
}
#endif /* PIM_IPV != 4 */
#endif /* PIM_IGMP_H */