net: ipv6: fragmentation: Drop the packet if fragmentation fails (fe56ce5a) · Commits · Wenxi XU / zephyr

If we could not fragment the IPv6 packet, then drop it and do not try to send it. Let the upper layer re-send the packet if needed. It is causing more trouble if we try to send the packet and not honor the MTU setting. Signed-off-by:

Jukka Rissanen <jukka.rissanen@nordicsemi.no>

subsys/net/ip/ipv6_nbr.c

+1 −10

Original line number	Diff line number	Diff line
		@@ -818,15 +818,7 @@ enum net_verdict net_ipv6_prepare_for_send(struct net_pkt *pkt)
		pkt, pkt_len);
		if (ret < 0) {
		NET_DBG("Cannot fragment IPv6 pkt (%d)", ret);

		if (ret == -ENOMEM) {
		/* Try to send the packet if we could
		* not allocate enough network packets
		* and hope the original large packet
		* can be sent ok.
		*/
		goto ignore_frag_error;
		}
		return NET_DROP;
		}

		/* We need to unref here because we simulate the packet
		@@ -841,7 +833,6 @@ enum net_verdict net_ipv6_prepare_for_send(struct net_pkt *pkt)
		return NET_CONTINUE;
		}
		}
		ignore_frag_error:
		#endif /* CONFIG_NET_IPV6_FRAGMENT */

		/* If the IPv6 destination address is not link local, then try to get

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