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Diffstat (limited to 'pimd/pim_igmp.h')
| -rw-r--r-- | pimd/pim_igmp.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/pimd/pim_igmp.h b/pimd/pim_igmp.h new file mode 100644 index 000000000..d45f223ba --- /dev/null +++ b/pimd/pim_igmp.h @@ -0,0 +1,176 @@ +/* + 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 + + $QuaggaId: $Format:%an, %ai, %h$ $ +*/ + +#ifndef PIM_IGMP_H +#define PIM_IGMP_H + +#include <netinet/in.h> + +#include <zebra.h> +#include "vty.h" +#include "linklist.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_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) + +/* RFC 3376: 8.1. Robustness Variable - Default: 2 */ +#define IGMP_DEFAULT_ROBUSTNESS_VARIABLE (2) + +/* RFC 3376: 8.2. Query Interval - Default: 125 seconds */ +#define IGMP_GENERAL_QUERY_INTERVAL (125) + +/* RFC 3376: 8.3. Query Response Interval - Default: 100 deciseconds */ +#define IGMP_QUERY_MAX_RESPONSE_TIME_DSEC (100) + +/* RFC 3376: 8.8. Last Member Query Interval - Default: 10 deciseconds */ +#define IGMP_SPECIFIC_QUERY_MAX_RESPONSE_TIME_DSEC (10) + +struct igmp_join { + struct in_addr group_addr; + struct in_addr source_addr; + int sock_fd; + time_t sock_creation; +}; + +struct igmp_sock { + int fd; + struct interface *interface; + struct in_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 */ + + int querier_query_interval; /* QQI */ + int querier_robustness_variable; /* QRV */ + int startup_query_count; + + struct list *igmp_group_list; /* list of struct igmp_group */ +}; + +struct igmp_sock *pim_igmp_sock_lookup_ifaddr(struct list *igmp_sock_list, + struct in_addr ifaddr); +struct igmp_sock *igmp_sock_lookup_by_fd(struct list *igmp_sock_list, + int fd); +struct igmp_sock *pim_igmp_sock_add(struct list *igmp_sock_list, + struct in_addr ifaddr, + struct interface *ifp); +void igmp_sock_delete(struct igmp_sock *igmp); +void igmp_sock_free(struct igmp_sock *igmp); + +int pim_igmp_packet(struct igmp_sock *igmp, char *buf, size_t len); + +void pim_igmp_general_query_on(struct igmp_sock *igmp); +void pim_igmp_general_query_off(struct igmp_sock *igmp); +void pim_igmp_other_querier_timer_on(struct igmp_sock *igmp); +void pim_igmp_other_querier_timer_off(struct igmp_sock *igmp); + +#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 igmp_source { + struct in_addr source_addr; + struct thread *t_source_timer; + struct igmp_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 igmp_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; + + struct in_addr group_addr; + int group_filtermode_isexcl; /* 0=INCLUDE, 1=EXCLUDE */ + struct list *group_source_list; /* list of struct igmp_source */ + time_t group_creation; + struct igmp_sock *group_igmp_sock; /* back pointer */ + int64_t last_igmp_v1_report_dsec; + int64_t last_igmp_v2_report_dsec; +}; + +struct igmp_group *igmp_add_group_by_addr(struct igmp_sock *igmp, + struct in_addr group_addr, + const char *ifname); + +void igmp_group_delete_empty_include(struct igmp_group *group); + +void igmp_startup_mode_on(struct igmp_sock *igmp); + +void igmp_group_timer_on(struct igmp_group *group, + long interval_msec, const char *ifname); + +#endif /* PIM_IGMP_H */ |