diff options
| -rw-r--r-- | hw/net/net_tx_pkt.c | 23 | ||||
| -rw-r--r-- | hw/net/net_tx_pkt.h | 14 | ||||
| -rw-r--r-- | include/net/eth.h | 1 |
3 files changed, 38 insertions, 0 deletions
diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c index 331c73c..9560e4a 100644 --- a/hw/net/net_tx_pkt.c +++ b/hw/net/net_tx_pkt.c @@ -626,6 +626,7 @@ bool net_tx_pkt_send(struct NetTxPkt *pkt, NetClientState *nc) if (pkt->has_virt_hdr || pkt->virt_hdr.gso_type == VIRTIO_NET_HDR_GSO_NONE) { + net_tx_pkt_fix_ip6_payload_len(pkt); net_tx_pkt_sendv(pkt, nc, pkt->vec, pkt->payload_frags + NET_TX_PKT_PL_START_FRAG); return true; @@ -644,3 +645,25 @@ bool net_tx_pkt_send_loopback(struct NetTxPkt *pkt, NetClientState *nc) return res; } + +void net_tx_pkt_fix_ip6_payload_len(struct NetTxPkt *pkt) +{ + struct iovec *l2 = &pkt->vec[NET_TX_PKT_L2HDR_FRAG]; + if (eth_get_l3_proto(l2, 1, l2->iov_len) == ETH_P_IPV6) { + struct ip6_header *ip6 = (struct ip6_header *) pkt->l3_hdr; + /* + * TODO: if qemu would support >64K packets - add jumbo option check + * something like that: + * 'if (ip6->ip6_plen == 0 && !has_jumbo_option(ip6)) {' + */ + if (ip6->ip6_plen == 0) { + if (pkt->payload_len <= ETH_MAX_IP_DGRAM_LEN) { + ip6->ip6_plen = htons(pkt->payload_len); + } + /* + * TODO: if qemu would support >64K packets + * add jumbo option for packets greater then 65,535 bytes + */ + } + } +} diff --git a/hw/net/net_tx_pkt.h b/hw/net/net_tx_pkt.h index 212ecc6..4ec8bbe 100644 --- a/hw/net/net_tx_pkt.h +++ b/hw/net/net_tx_pkt.h @@ -187,4 +187,18 @@ bool net_tx_pkt_parse(struct NetTxPkt *pkt); */ bool net_tx_pkt_has_fragments(struct NetTxPkt *pkt); +/** + * Fix IPv6 'plen' field. + * If ipv6 payload length field is 0 - then there should be Hop-by-Hop + * option for packets greater than 65,535. + * For packets with a payload less than 65,535: fix 'plen' field. + * For backends with vheader, we need just one packet with proper + * payload size. For now, qemu drops every packet with size greater 64K + * (see net_tx_pkt_send()) so, there is no reason to add jumbo option to ip6 + * hop-by-hop extension if it's missed + * + * @pkt packet + */ +void net_tx_pkt_fix_ip6_payload_len(struct NetTxPkt *pkt); + #endif diff --git a/include/net/eth.h b/include/net/eth.h index 7f45c67..0671be6 100644 --- a/include/net/eth.h +++ b/include/net/eth.h @@ -186,6 +186,7 @@ struct tcp_hdr { #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt #define ip6_ecn_acc ip6_ctlun.ip6_un3.ip6_un3_ecn +#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen #define PKT_GET_ETH_HDR(p) \ ((struct eth_header *)(p)) |