From patchwork Sun Nov 21 23:55:50 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Eckelmann X-Patchwork-Id: 532 Return-Path: Received: from mail.gmx.net (mailout-de.gmx.net [213.165.64.23]) by open-mesh.org (Postfix) with SMTP id 481E21545E7 for ; Mon, 22 Nov 2010 00:56:08 +0100 (CET) Received: (qmail invoked by alias); 21 Nov 2010 23:56:07 -0000 Received: from vpnclient-194-112.hrz.tu-chemnitz.de (EHLO sven-desktop.lazhur.ath.cx) [134.109.194.112] by mail.gmx.net (mp017) with SMTP; 22 Nov 2010 00:56:07 +0100 X-Authenticated: #15668376 X-Provags-ID: V01U2FsdGVkX19kYWBWoptk3evitsbVW82nntIIQiu6dchL3KcU79 hqL9c7X1Sy9DIY From: Sven Eckelmann To: greg@kroah.com Date: Mon, 22 Nov 2010 00:55:50 +0100 Message-Id: <1290383767-32602-13-git-send-email-sven.eckelmann@gmx.de> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1290383767-32602-1-git-send-email-sven.eckelmann@gmx.de> References: <1290383767-32602-1-git-send-email-sven.eckelmann@gmx.de> X-Y-GMX-Trusted: 0 Cc: b.a.t.m.a.n@lists.open-mesh.org Subject: [B.A.T.M.A.N.] [PATCH 12/29] Staging: batman-adv: reassemble fragmented skb if mtu allows it X-BeenThere: b.a.t.m.a.n@lists.open-mesh.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 21 Nov 2010 23:56:08 -0000 From: Andreas Langer Signed-off-by: Andreas Langer Signed-off-by: Sven Eckelmann --- drivers/staging/batman-adv/routing.c | 21 ++++++++++++++++++++- drivers/staging/batman-adv/unicast.c | 8 ++++++++ 2 files changed, 28 insertions(+), 1 deletions(-) diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c index 1e10111..750cec7 100644 --- a/drivers/staging/batman-adv/routing.c +++ b/drivers/staging/batman-adv/routing.c @@ -1128,6 +1128,8 @@ static int route_unicast_packet(struct sk_buff *skb, unsigned long flags; struct unicast_packet *unicast_packet; struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb); + int ret; + struct sk_buff *new_skb; unicast_packet = (struct unicast_packet *)skb->data; @@ -1171,6 +1173,22 @@ static int route_unicast_packet(struct sk_buff *skb, return frag_send_skb(skb, bat_priv, batman_if, dstaddr); + if (unicast_packet->packet_type == BAT_UNICAST_FRAG && + 2 * skb->len - hdr_size <= batman_if->net_dev->mtu) { + + ret = frag_reassemble_skb(skb, bat_priv, &new_skb); + + if (ret == NET_RX_DROP) + return NET_RX_DROP; + + /* packet was buffered for late merge */ + if (!new_skb) + return NET_RX_SUCCESS; + + skb = new_skb; + unicast_packet = (struct unicast_packet *) skb->data; + } + /* decrement ttl */ unicast_packet->ttl--; @@ -1224,7 +1242,8 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if) if (!new_skb) return NET_RX_SUCCESS; - interface_rx(recv_if->soft_iface, new_skb, hdr_size); + interface_rx(recv_if->soft_iface, new_skb, + sizeof(struct unicast_packet)); return NET_RX_SUCCESS; } diff --git a/drivers/staging/batman-adv/unicast.c b/drivers/staging/batman-adv/unicast.c index 12afae6..e58e634 100644 --- a/drivers/staging/batman-adv/unicast.c +++ b/drivers/staging/batman-adv/unicast.c @@ -36,6 +36,9 @@ static struct sk_buff *frag_merge_packet(struct list_head *head, struct unicast_frag_packet *up = (struct unicast_frag_packet *)skb->data; struct sk_buff *tmp_skb; + struct unicast_packet *unicast_packet; + int hdr_len = sizeof(struct unicast_packet), + uni_diff = sizeof(struct unicast_frag_packet) - hdr_len; /* set skb to the first part and tmp_skb to the second part */ if (up->flags & UNI_FRAG_HEAD) { @@ -59,6 +62,11 @@ static struct sk_buff *frag_merge_packet(struct list_head *head, memcpy(skb_put(skb, tmp_skb->len), tmp_skb->data, tmp_skb->len); kfree_skb(tmp_skb); + + memmove(skb->data + uni_diff, skb->data, hdr_len); + unicast_packet = (struct unicast_packet *) skb_pull(skb, uni_diff); + unicast_packet->packet_type = BAT_UNICAST; + return skb; }