Adding upstream version 8.4.4.upstream/8.4.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 243 insertions, 0 deletions

diff --git a/pimd/pim_msg.h b/pimd/pim_msg.h
new file mode 100644
index 0000000..733210a
--- /dev/null
+++ b/pimd/pim_msg.h
@@ -0,0 +1,243 @@
+/*
+ * 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_MSG_H
+#define PIM_MSG_H
+
+#include <netinet/in.h>
+#if PIM_IPV == 6
+#include <netinet/ip6.h>
+#endif
+
+#include "pim_jp_agg.h"
+
+#define PIM_HDR_LEN  sizeof(struct pim_msg_header)
+/*
+  Number       Description
+  ----------   ------------------
+  0            Reserved
+  1            IP (IP version 4)
+  2            IP6 (IP version 6)
+
+  From:
+  http://www.iana.org/assignments/address-family-numbers
+*/
+enum pim_msg_address_family {
+	PIM_MSG_ADDRESS_FAMILY_RESERVED,
+	PIM_MSG_ADDRESS_FAMILY_IPV4,
+	PIM_MSG_ADDRESS_FAMILY_IPV6,
+};
+
+/*
+ * pim_msg_hdr
+ * =========================
+ *  PIM Header definition as per RFC 5059. N bit introduced to indicate
+ *  do-not-forward option in PIM Boot strap Message.
+ *    0                   1                   2                   3
+ *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |PIM Ver| Type  |N|  Reserved   |           Checksum            |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+struct pim_msg_header {
+#if (BYTE_ORDER == LITTLE_ENDIAN)
+	uint8_t type : 4;
+	uint8_t ver : 4;
+	uint8_t reserved : 7;
+	uint8_t Nbit : 1; /* No Fwd Bit */
+#elif (BYTE_ORDER == BIG_ENDIAN)
+	uint8_t ver : 4;
+	uint8_t type : 4;
+	uint8_t Nbit : 1; /* No Fwd Bit */
+	uint8_t reserved : 7;
+#else
+#error"Please set byte order"
+#endif
+	uint16_t checksum;
+} __attribute__((packed));
+
+struct pim_encoded_ipv4_unicast {
+	uint8_t family;
+	uint8_t reserved;
+	struct in_addr addr;
+} __attribute__((packed));
+
+struct pim_encoded_ipv6_unicast {
+	uint8_t family;
+	uint8_t reserved;
+	struct in6_addr addr;
+} __attribute__((packed));
+
+/*
+ *  Encoded Group format. RFC 4601 Sec 4.9.1
+ *   0                   1                   2                   3
+ *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |  Addr Family  | Encoding Type |B| Reserved  |Z|  Mask Len     |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                Group multicast Address
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
+ */
+struct pim_encoded_group_ipv4 {
+	uint8_t family;
+	uint8_t ne;
+#if (BYTE_ORDER == LITTLE_ENDIAN)
+	uint8_t sz : 1;	/* scope zone bit */
+	uint8_t reserved : 6;	/* Reserved */
+	uint8_t bidir : 1;	/* Bidir bit */
+#elif (BYTE_ORDER == BIG_ENDIAN)
+	uint8_t bidir : 1;	/* Bidir bit */
+	uint8_t reserved : 6;	/* Reserved */
+	uint8_t sz : 1;		/* scope zone bit */
+#else
+#error"Please set byte order"
+#endif
+	uint8_t mask;
+	struct in_addr addr;
+} __attribute__((packed));
+
+struct pim_encoded_group_ipv6 {
+	uint8_t family;
+	uint8_t ne;
+#if (BYTE_ORDER == LITTLE_ENDIAN)
+	uint8_t sz : 1;	      /* scope zone bit */
+	uint8_t reserved : 6; /* Reserved */
+	uint8_t bidir : 1;    /* Bidir bit */
+#elif (BYTE_ORDER == BIG_ENDIAN)
+	uint8_t bidir : 1;	/* Bidir bit */
+	uint8_t reserved : 6;	/* Reserved */
+	uint8_t sz : 1;		/* scope zone bit */
+#else
+#error "Please set byte order"
+#endif
+	uint8_t mask;
+	struct in6_addr addr;
+} __attribute__((packed));
+
+/*
+ *  Encoded Source format. RFC 4601 Sec 4.9.1
+ *   0                   1                   2                   3
+ *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  | Addr Family   | Encoding Type | Rsrvd   |S|W|R|  Mask Len     |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                        Source Address
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...
+ */
+struct pim_encoded_source_ipv4 {
+	uint8_t family;
+	uint8_t ne;
+	uint8_t bits;
+	uint8_t mask;
+	struct in_addr addr;
+} __attribute__((packed));
+
+struct pim_encoded_source_ipv6 {
+	uint8_t family;
+	uint8_t ne;
+	uint8_t bits;
+	uint8_t mask;
+	struct in6_addr addr;
+} __attribute__((packed));
+
+/* clang-format off */
+#if PIM_IPV == 4
+typedef struct pim_encoded_ipv4_unicast pim_encoded_unicast;
+typedef struct pim_encoded_group_ipv4   pim_encoded_group;
+typedef struct pim_encoded_source_ipv4  pim_encoded_source;
+typedef struct ip 			ipv_hdr;
+#define IPV_SRC(ip_hdr)			((ip_hdr))->ip_src
+#define IPV_DST(ip_hdr)			((ip_hdr))->ip_dst
+#define IPV_LEN(ip_hdr)			((ip_hdr))->ip_len
+#else
+typedef struct pim_encoded_ipv6_unicast pim_encoded_unicast;
+typedef struct pim_encoded_group_ipv6   pim_encoded_group;
+typedef struct pim_encoded_source_ipv6  pim_encoded_source;
+typedef struct ip6_hdr 			ipv_hdr;
+#define IPV_SRC(ip_hdr)			((ip_hdr))->ip6_src
+#define IPV_DST(ip_hdr)			((ip_hdr))->ip6_dst
+#define IPV_LEN(ip_hdr)			((ip_hdr))->ip6_plen
+#endif
+/* clang-format on */
+
+struct pim_jp_groups {
+	pim_encoded_group g;
+	uint16_t joins;
+	uint16_t prunes;
+	pim_encoded_source s[1];
+} __attribute__((packed));
+
+struct pim_jp {
+	struct pim_msg_header header;
+	pim_encoded_unicast addr;
+	uint8_t reserved;
+	uint8_t num_groups;
+	uint16_t holdtime;
+	struct pim_jp_groups groups[1];
+} __attribute__((packed));
+
+#if PIM_IPV == 4
+static inline pim_sgaddr pim_sgaddr_from_iphdr(const void *iphdr)
+{
+	const struct ip *ipv4_hdr = iphdr;
+	pim_sgaddr sg;
+
+	sg.src = ipv4_hdr->ip_src;
+	sg.grp = ipv4_hdr->ip_dst;
+
+	return sg;
+}
+#else
+static inline pim_sgaddr pim_sgaddr_from_iphdr(const void *iphdr)
+{
+	const struct ip6_hdr *ipv6_hdr = iphdr;
+	pim_sgaddr sg;
+
+	sg.src = ipv6_hdr->ip6_src;
+	sg.grp = ipv6_hdr->ip6_dst;
+
+	return sg;
+}
+#endif
+
+void pim_msg_build_header(pim_addr src, pim_addr dst, uint8_t *pim_msg,
+			  size_t pim_msg_size, uint8_t pim_msg_type,
+			  bool no_fwd);
+uint8_t *pim_msg_addr_encode_ipv4_ucast(uint8_t *buf, struct in_addr addr);
+uint8_t *pim_msg_addr_encode_ipv4_group(uint8_t *buf, struct in_addr addr);
+
+#define PIM_ENCODE_SPARSE_BIT      0x04
+#define PIM_ENCODE_WC_BIT          0x02
+#define PIM_ENCODE_RPT_BIT         0x01
+uint8_t *pim_msg_addr_encode_ipv4_source(uint8_t *buf, struct in_addr addr,
+					 uint8_t bits);
+
+uint8_t *pim_msg_addr_encode_ipv6_ucast(uint8_t *buf, struct in6_addr addr);
+uint8_t *pim_msg_addr_encode_ipv6_group(uint8_t *buf, struct in6_addr addr);
+uint8_t *pim_msg_addr_encode_ipv6_source(uint8_t *buf, struct in6_addr addr,
+					 uint8_t bits);
+
+uint8_t *pim_msg_addr_encode_ucast(uint8_t *buf, pim_addr addr);
+uint8_t *pim_msg_addr_encode_group(uint8_t *buf, pim_addr addr);
+uint8_t *pim_msg_addr_encode_source(uint8_t *buf, pim_addr addr, uint8_t bits);
+
+size_t pim_msg_get_jp_group_size(struct list *sources);
+size_t pim_msg_build_jp_groups(struct pim_jp_groups *grp,
+			       struct pim_jp_agg_group *sgs, size_t size);
+#endif /* PIM_MSG_H */