diff options
Diffstat (limited to 'pimd/pim_igmp.h')
| -rw-r--r-- | pimd/pim_igmp.h | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/pimd/pim_igmp.h b/pimd/pim_igmp.h new file mode 100644 index 0000000..9ce3a2a --- /dev/null +++ b/pimd/pim_igmp.h @@ -0,0 +1,246 @@ +/* + * 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 + */ + +#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 gm_sock { + int fd; + struct interface *interface; + pim_addr ifaddr; + time_t sock_creation; + + struct thread *t_igmp_read; /* read: IGMP sockets */ + struct thread + *t_igmp_query_timer; /* timer: issue IGMP general queries */ + struct thread *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 thread *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 thread *t_group_timer; + + /* Shared between group-specific and + group-and-source-specific retransmissions */ + struct thread *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 */ |