isisd: Cleanup related to SRv6

Remove unused SRv6 code.

Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>

1 files changed, 0 insertions, 111 deletions

diff --git a/isisd/isis_srv6.c b/isisd/isis_srv6.c
index c7bc7f0692..b5974b1a62 100644
--- a/isisd/isis_srv6.c
+++ b/isisd/isis_srv6.c
@@ -221,117 +221,6 @@ void isis_srv6_interface_set(struct isis_area *area, const char *ifname)
 }
 
 /**
- * Encode SID function in the SRv6 SID.
- *
- * @param sid
- * @param func
- * @param offset
- * @param len
- */
-static void encode_sid_func(struct in6_addr *sid, uint32_t func, uint8_t offset,
-			    uint8_t len)
-{
-	for (uint8_t idx = 0; idx < len; idx++) {
-		uint8_t tidx = offset + idx;
-		sid->s6_addr[tidx / 8] &= ~(0x1 << (7 - tidx % 8));
-		if (func >> (len - 1 - idx) & 0x1)
-			sid->s6_addr[tidx / 8] |= 0x1 << (7 - tidx % 8);
-	}
-}
-
-static bool sid_exist(struct isis_area *area, const struct in6_addr *sid)
-{
-	struct listnode *node;
-	struct isis_srv6_sid *s;
-	struct srv6_adjacency *sra;
-
-	for (ALL_LIST_ELEMENTS_RO(area->srv6db.srv6_sids, node, s))
-		if (sid_same(&s->sid, sid))
-			return true;
-	for (ALL_LIST_ELEMENTS_RO(area->srv6db.srv6_endx_sids, node, sra))
-		if (sid_same(&sra->sid, sid))
-			return true;
-	return false;
-}
-
-/**
- * Request a SID from the SRv6 locator.
- *
- * @param area		IS-IS area
- * @param locator	SRv6 locator
- * @param sid_func	The FUNCTION part of the SID to be allocated (a negative
- * number will allocate the first available SID)
- *
- * @return	First available SID on success or in6addr_any if the SRv6
- * locator is full
- */
-static struct in6_addr srv6_locator_request_sid(struct isis_area *area,
-						struct srv6_locator *locator,
-						int sid_func)
-{
-	struct in6_addr sid;
-	uint8_t offset = 0;
-	uint8_t func_len = 0;
-	uint32_t func_max;
-	bool allocated = false;
-
-	if (!area || !locator)
-		return in6addr_any;
-
-	sr_debug("ISIS-SRv6 (%s): requested new SID from locator %s",
-		 area->area_tag, locator->name);
-
-	/* Let's build the SID, step by step. A SID has the following structure
-	(defined in RFC 8986): LOCATOR:FUNCTION:ARGUMENT.*/
-
-	/* First, we encode the LOCATOR in the L most significant bits. */
-	sid = locator->prefix.prefix;
-
-	/* The next part of the SID is the FUNCTION. Let's compute the length
-	 * and the offset of the FUNCTION in the SID */
-	func_len = locator->function_bits_length;
-	offset = locator->block_bits_length + locator->node_bits_length;
-
-	/* Then, encode the FUNCTION */
-	if (sid_func >= 0) {
-		/* SID FUNCTION has been specified. We need to allocate a SID
-		 * with the requested FUNCTION. */
-		encode_sid_func(&sid, sid_func, offset, func_len);
-		if (sid_exist(area, &sid)) {
-			zlog_warn(
-				"ISIS-SRv6 (%s): the requested SID %pI6 is already used",
-				area->area_tag, &sid);
-			return sid;
-		}
-		allocated = true;
-	} else {
-		/* SID FUNCTION not specified. We need to choose a FUNCTION that
-		 * is not already used. So let's iterate through all possible
-		 * functions and get the first available one. */
-		func_max = (1 << func_len) - 1;
-		for (uint32_t func = 1; func < func_max; func++) {
-			encode_sid_func(&sid, func, offset, func_len);
-			if (sid_exist(area, &sid))
-				continue;
-			allocated = true;
-			break;
-		}
-	}
-
-	if (!allocated) {
-		/* We ran out of available SIDs */
-		zlog_warn("ISIS-SRv6 (%s): no SIDs available in locator %s",
-			  area->area_tag, locator->name);
-		return in6addr_any;
-	}
-
-	sr_debug("ISIS-SRv6 (%s): allocating new SID %pI6", area->area_tag,
-		 &sid);
-
-	return sid;
-}
-
-/**
  * Allocate an SRv6 SID from an SRv6 locator.
  *
  * @param area		IS-IS area