diff mbox series

[38/90] rtnl: Add support for extracting the table identifier.

Message ID 20231206235056.322578-39-gerickson@nuovations.com (mailing list archive)
State Not Applicable, archived
Headers show
Series Add Gateway Low-priority Default Routes for Non-default Services | expand

Commit Message

Grant Erickson Dec. 6, 2023, 11:50 p.m. UTC 
From: Grant Erickson <erick205@umn.edu>

This adds support for extracting the Routing Netlink (rtnl) table
identifier attribute from rtnl messages.
---
 src/rtnl.c | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/src/rtnl.c b/src/rtnl.c
index e8a8325ee22b..056107831038 100644
--- a/src/rtnl.c
+++ b/src/rtnl.c
@@ -670,7 +670,8 @@  static void process_deladdr(unsigned char family, unsigned char prefixlen,
 
 static void extract_ipv4_route(struct rtmsg *msg, int bytes, int *index,
 						struct in_addr *dst,
-						struct in_addr *gateway)
+						struct in_addr *gateway,
+						uint32_t *table_id)
 {
 	struct rtattr *attr;
 
@@ -689,13 +690,18 @@  static void extract_ipv4_route(struct rtmsg *msg, int bytes, int *index,
 			if (index)
 				*index = *((int *) RTA_DATA(attr));
 			break;
+		case RTA_TABLE:
+			if (table_id)
+				*table_id = *((uint32_t *) RTA_DATA(attr));
+			break;
 		}
 	}
 }
 
 static void extract_ipv6_route(struct rtmsg *msg, int bytes, int *index,
 						struct in6_addr *dst,
-						struct in6_addr *gateway)
+						struct in6_addr *gateway,
+						uint32_t *table_id)
 {
 	struct rtattr *attr;
 
@@ -715,6 +721,10 @@  static void extract_ipv6_route(struct rtmsg *msg, int bytes, int *index,
 			if (index)
 				*index = *((int *) RTA_DATA(attr));
 			break;
+		case RTA_TABLE:
+			if (table_id)
+				*table_id = *((uint32_t *) RTA_DATA(attr));
+			break;
 		}
 	}
 }
@@ -729,7 +739,8 @@  static void process_newroute(unsigned char family, unsigned char scope,
 	if (family == AF_INET) {
 		struct in_addr dst = { INADDR_ANY }, gateway = { INADDR_ANY };
 
-		extract_ipv4_route(msg, bytes, &index, &dst, &gateway);
+		extract_ipv4_route(msg, bytes, &index, &dst, &gateway,
+			NULL);
 
 		inet_ntop(family, &dst, dststr, sizeof(dststr));
 		inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
@@ -749,7 +760,8 @@  static void process_newroute(unsigned char family, unsigned char scope,
 		struct in6_addr dst = IN6ADDR_ANY_INIT,
 				gateway = IN6ADDR_ANY_INIT;
 
-		extract_ipv6_route(msg, bytes, &index, &dst, &gateway);
+		extract_ipv6_route(msg, bytes, &index, &dst, &gateway,
+			NULL);
 
 		inet_ntop(family, &dst, dststr, sizeof(dststr));
 		inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
@@ -786,7 +798,8 @@  static void process_delroute(unsigned char family, unsigned char scope,
 	if (family == AF_INET) {
 		struct in_addr dst = { INADDR_ANY }, gateway = { INADDR_ANY };
 
-		extract_ipv4_route(msg, bytes, &index, &dst, &gateway);
+		extract_ipv4_route(msg, bytes, &index, &dst, &gateway,
+			NULL);
 
 		inet_ntop(family, &dst, dststr, sizeof(dststr));
 		inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
@@ -806,7 +819,8 @@  static void process_delroute(unsigned char family, unsigned char scope,
 		struct in6_addr dst = IN6ADDR_ANY_INIT,
 				gateway = IN6ADDR_ANY_INIT;
 
-		extract_ipv6_route(msg, bytes, &index, &dst, &gateway);
+		extract_ipv6_route(msg, bytes, &index, &dst, &gateway,
+			NULL);
 
 		inet_ntop(family, &dst, dststr, sizeof(dststr));
 		inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));