summaryrefslogtreecommitdiff
path: root/pimd/pim_tlv.c
diff options
context:
space:
mode:
Diffstat (limited to 'pimd/pim_tlv.c')
-rw-r--r--pimd/pim_tlv.c144
1 files changed, 120 insertions, 24 deletions
diff --git a/pimd/pim_tlv.c b/pimd/pim_tlv.c
index 546ceb86e1..5223f60e1b 100644
--- a/pimd/pim_tlv.c
+++ b/pimd/pim_tlv.c
@@ -95,8 +95,35 @@ uint8_t *pim_tlv_append_uint32(uint8_t *buf,
#define ucast_ipv4_encoding_len (2 + sizeof(struct in_addr))
-static int
-pim_encode_unicast_address (uint8_t *buf, struct prefix *p)
+/*
+ * An Encoded-Unicast address takes the following format:
+ *
+ * 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 | Unicast Address
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
+ *
+ * Addr Family
+ * The PIM address family of the 'Unicast Address' field of this
+ * address.
+ *
+ * Values 0-127 are as assigned by the IANA for Internet Address * Families in [7]. Values 128-250 are reserved to be assigned by
+ * the IANA for PIM-specific Address Families. Values 251 though
+ * 255 are designated for private use. As there is no assignment
+ * authority for this space, collisions should be expected.
+ *
+ * Encoding Type
+ * The type of encoding used within a specific Address Family. The
+ * value '0' is reserved for this field and represents the native
+ * encoding of the Address Family.
+ *
+ * Unicast Address
+ * The unicast address as represented by the given Address Family
+ * and Encoding Type.
+ */
+int
+pim_encode_addr_ucast (uint8_t *buf, struct prefix *p)
{
switch (p->family)
{
@@ -114,6 +141,79 @@ pim_encode_unicast_address (uint8_t *buf, struct prefix *p)
}
}
+#define group_ipv4_encoding_len (4 + sizeof (struct in_addr))
+
+/*
+ * Encoded-Group addresses take the following format:
+ *
+ * 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
+ *
+ * Addr Family
+ * Described above.
+ *
+ * Encoding Type
+ * Described above.
+ *
+ * [B]idirectional PIM
+ * Indicates the group range should use Bidirectional PIM [13].
+ * For PIM-SM defined in this specification, this bit MUST be zero.
+ *
+ * Reserved
+ * Transmitted as zero. Ignored upon receipt.
+ *
+ * Admin Scope [Z]one
+ * indicates the group range is an admin scope zone. This is used
+ * in the Bootstrap Router Mechanism [11] only. For all other
+ * purposes, this bit is set to zero and ignored on receipt.
+ *
+ * Mask Len
+ * The Mask length field is 8 bits. The value is the number of
+ * contiguous one bits that are left justified and used as a mask;
+ * when combined with the group address, it describes a range of
+ * groups. It is less than or equal to the address length in bits
+ * for the given Address Family and Encoding Type. If the message
+ * is sent for a single group, then the Mask length must equal the
+ * address length in bits for the given Address Family and Encoding
+ * Type (e.g., 32 for IPv4 native encoding, 128 for IPv6 native
+ * encoding).
+ *
+ * Group multicast Address
+ * Contains the group address.
+ */
+int
+pim_encode_addr_group (uint8_t *buf, afi_t afi, int bidir, int scope, struct in_addr group)
+{
+ uint8_t flags = 0;
+
+ flags |= bidir << 8;
+ flags |= scope;
+
+ switch (afi)
+ {
+ case AFI_IP:
+ *(uint8_t *)buf = PIM_MSG_ADDRESS_FAMILY_IPV4;
+ ++buf;
+ *(uint8_t *)buf = 0;
+ ++buf;
+ *(uint8_t *)buf = flags;
+ ++buf;
+ *(uint8_t *)buf = 32;
+ ++buf;
+ memcpy (buf, &group, sizeof (struct in_addr));
+ return group_ipv4_encoding_len;
+ break;
+ default:
+ return 0;
+ break;
+ }
+}
+
uint8_t *pim_tlv_append_addrlist_ucast(uint8_t *buf,
const uint8_t *buf_pastend,
struct list *ifconnected)
@@ -143,7 +243,7 @@ uint8_t *pim_tlv_append_addrlist_ucast(uint8_t *buf,
if ((curr + ucast_ipv4_encoding_len) > buf_pastend)
return 0;
- l_encode = pim_encode_unicast_address (curr, p);
+ l_encode = pim_encode_addr_ucast (curr, p);
curr += l_encode;
option_len += l_encode;
}
@@ -173,7 +273,7 @@ static int check_tlv_length(const char *label, const char *tlv_name,
int correct_len, int option_len)
{
if (option_len != correct_len) {
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_warn("%s: PIM hello %s TLV with incorrect value size=%d correct=%d from %s on interface %s",
label, tlv_name,
@@ -192,7 +292,7 @@ static void check_tlv_redefinition_uint16(const char *label, const char *tlv_nam
uint16_t new, uint16_t old)
{
if (PIM_OPTION_IS_SET(options, opt_mask)) {
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_warn("%s: PIM hello TLV redefined %s=%u old=%u from %s on interface %s",
label, tlv_name,
@@ -208,7 +308,7 @@ static void check_tlv_redefinition_uint32(const char *label, const char *tlv_nam
uint32_t new, uint32_t old)
{
if (PIM_OPTION_IS_SET(options, opt_mask)) {
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_warn("%s: PIM hello TLV redefined %s=%u old=%u from %s on interface %s",
label, tlv_name,
@@ -224,7 +324,7 @@ static void check_tlv_redefinition_uint32_hex(const char *label, const char *tlv
uint32_t new, uint32_t old)
{
if (PIM_OPTION_IS_SET(options, opt_mask)) {
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_warn("%s: PIM hello TLV redefined %s=%08x old=%08x from %s on interface %s",
label, tlv_name,
@@ -408,7 +508,7 @@ pim_parse_addr_ucast (struct prefix *p,
}
int
-pim_parse_addr_group (struct prefix *p,
+pim_parse_addr_group (struct prefix_sg *sg,
const uint8_t *buf,
int buf_size)
{
@@ -450,17 +550,15 @@ pim_parse_addr_group (struct prefix *p,
return -3;
}
- p->family = AF_INET; /* notice: AF_INET != PIM_MSG_ADDRESS_FAMILY_IPV4 */
- memcpy(&p->u.prefix4, addr, sizeof(struct in_addr));
- p->prefixlen = mask_len;
+ memcpy(&sg->grp.s_addr, addr, sizeof(struct in_addr));
addr += sizeof(struct in_addr);
break;
default:
{
- zlog_warn("%s: unknown group address encoding family=%d from",
- __PRETTY_FUNCTION__, family);
+ zlog_warn("%s: unknown group address encoding family=%d mask_len=%d from",
+ __PRETTY_FUNCTION__, family, mask_len);
return -4;
}
}
@@ -469,7 +567,7 @@ pim_parse_addr_group (struct prefix *p,
}
int
-pim_parse_addr_source(struct prefix *p,
+pim_parse_addr_source(struct prefix_sg *sg,
uint8_t *flags,
const uint8_t *buf,
int buf_size)
@@ -513,9 +611,7 @@ pim_parse_addr_source(struct prefix *p,
return -3;
}
- p->family = AF_INET; /* notice: AF_INET != PIM_MSG_ADDRESS_FAMILY_IPV4 */
- memcpy(&p->u.prefix4, addr, sizeof(struct in_addr));
- p->prefixlen = mask_len;
+ memcpy(&sg->src, addr, sizeof(struct in_addr));
/*
RFC 4601: 4.9.1 Encoded Source and Group Address Formats
@@ -527,9 +623,9 @@ pim_parse_addr_source(struct prefix *p,
and 128 for IPv6 native). A router SHOULD ignore any messages
received with any other mask length.
*/
- if (p->prefixlen != 32) {
+ if (mask_len != 32) {
zlog_warn("%s: IPv4 bad source address mask: %d",
- __PRETTY_FUNCTION__, p->prefixlen);
+ __PRETTY_FUNCTION__, mask_len);
return -4;
}
@@ -582,7 +678,7 @@ int pim_tlv_parse_addr_list(const char *ifname, struct in_addr src_addr,
*/
addr_offset = pim_parse_addr_ucast(&tmp, addr, pastend - addr);
if (addr_offset < 1) {
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_warn("%s: pim_parse_addr_ucast() failure: from %s on %s",
__PRETTY_FUNCTION__,
@@ -599,8 +695,8 @@ int pim_tlv_parse_addr_list(const char *ifname, struct in_addr src_addr,
switch (tmp.family) {
case AF_INET:
{
- char addr_str[100];
- char src_str[100];
+ char addr_str[INET_ADDRSTRLEN];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<addr?>", tmp.u.prefix4, addr_str, sizeof(addr_str));
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_debug("%s: PIM hello TLV option: list_old_size=%d IPv4 address %s from %s on %s",
@@ -612,7 +708,7 @@ int pim_tlv_parse_addr_list(const char *ifname, struct in_addr src_addr,
break;
default:
{
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_debug("%s: PIM hello TLV option: list_old_size=%d UNKNOWN address family from %s on %s",
__PRETTY_FUNCTION__,
@@ -629,7 +725,7 @@ int pim_tlv_parse_addr_list(const char *ifname, struct in_addr src_addr,
*/
if (tmp.family == AF_INET) {
if (tmp.u.prefix4.s_addr == src_addr.s_addr) {
- char src_str[100];
+ char src_str[INET_ADDRSTRLEN];
pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str));
zlog_warn("%s: ignoring primary address in secondary list from %s on %s",
__PRETTY_FUNCTION__,
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-10 03:19:25 +0000