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-rw-r--r--pimd/pim_igmp.h246
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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 12:25:49 +0000