Change in libosmocore[master]: socket: IPv6 support for osmo_sock_set_dscp()

[laforge]

laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/23935 )


Change subject: socket: IPv6 support for osmo_sock_set_dscp()
......................................................................

socket: IPv6 support for osmo_sock_set_dscp()

IPv6 has the analogous to DSCP: The "traffic class" field.

See https://tools.ietf.org/html/draft-itojun-ipv6-tclass-api-03

Change-Id: Ib31b977f67d60aa7f30ca4ab6eceba3d1d5eeee1
Related: SYS#5427
---
M src/socket.c
1 file changed, 8 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/35/23935/1

diff --git a/src/socket.c b/src/socket.c
index 6afe986..a8cc5c1 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -1810,8 +1810,14 @@
 
 	/* read the original value */
 	rc = getsockopt(fd, IPPROTO_IP, IP_TOS, &tos, &tos_len);
-	if (rc < 0)
-		return rc;
+	if (rc < 0) {
+		if (errno == ENOPROTOOPT) {
+			/* this may be an IPV6 socket, let's try that. IPv6 never had the TOS
+			 * legacy, so we can set the traffic class un-shifted  */
+			return setsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS, &dscp, sizeof(dscp));
+		} else
+			return rc;
+	}
 
 	/* mask-in the DSCP into the upper 6 bits */
 	tos &= 0x03;

-- 
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: Ib31b977f67d60aa7f30ca4ab6eceba3d1d5eeee1
Gerrit-Change-Number: 23935
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <laforge at osmocom.org>
Gerrit-MessageType: newchange
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