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author | Maciej Żenczykowski <maze@google.com> | 2023-03-14 23:25:00 +0000 |
---|---|---|
committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2023-03-14 23:25:00 +0000 |
commit | 1afdff720473aaba38ff824e83ad19c90195960f (patch) | |
tree | 0b20324fce0eb0fa7211e557ad6ab56b01c2e880 | |
parent | b13f6a4f50646226dbc7b56758a809d5152ec882 (diff) | |
parent | 8eb4888e0ed98f81c3157dec8de2faf5339e2d16 (diff) | |
download | android-clat-1afdff720473aaba38ff824e83ad19c90195960f.tar.gz |
Merge "clatd: skip over virtio_net_hdr"
-rw-r--r-- | clatd.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -36,6 +36,7 @@ #include <linux/if_ether.h> #include <linux/if_packet.h> #include <linux/if_tun.h> +#include <linux/virtio_net.h> #include <net/if.h> #include <sys/uio.h> @@ -83,6 +84,7 @@ void process_packet_6_to_4(struct tun_data *tunnel) { // we don't really support vlans (or especially Q-in-Q)... // but a few bytes of extra buffer space doesn't hurt... struct { + struct virtio_net_hdr vnet; uint8_t payload[22 + MAXMTU]; char pad; // +1 to make packet truncation obvious } buf; @@ -125,7 +127,7 @@ void process_packet_6_to_4(struct tun_data *tunnel) { } } - if (readlen < tp_net) { + if (readlen < sizeof(struct virtio_net_hdr) + tp_net) { logmsg(ANDROID_LOG_WARN, "%s: ignoring %zd byte pkt shorter than %u L2 header", __func__, readlen, tp_net); return; @@ -140,7 +142,7 @@ void process_packet_6_to_4(struct tun_data *tunnel) { } } - translate_packet(tunnel->fd4, 0 /* to_ipv6 */, buf.payload + tp_net, readlen - tp_net); + translate_packet(tunnel->fd4, 0 /* to_ipv6 */, buf.payload + tp_net, readlen - sizeof(struct virtio_net_hdr) - tp_net); } // reads TUN_PI + L3 IPv4 packet from tun, translates to IPv6, writes to AF_INET6/RAW socket |