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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2010-11-14 17:26:13 +0100
committerGerrit Renker <gerrit@erg.abdn.ac.uk>2010-11-15 07:12:01 +0100
commit7e87fe84303cc54ecf3c7b688cb08ca24322a41d (patch)
treedf764cbfefe19e628e92a8353d331d91c33212b6 /net/dccp/ackvec.c
parentdccp ccid-2: Remove old infrastructure (diff)
downloadlinux-dev-7e87fe84303cc54ecf3c7b688cb08ca24322a41d.tar.xz
linux-dev-7e87fe84303cc54ecf3c7b688cb08ca24322a41d.zip
dccp ccid-2: Separate option parsing from CCID processing
This patch replaces an almost identical replication of code: large parts of dccp_parse_options() re-appeared as ccid2_ackvector() in ccid2.c. Apart from the duplication, this caused two more problems: 1. CCIDs should not need to be concerned with parsing header options; 2. one can not assume that Ack Vectors appear as a contiguous area within an skb, it is legal to insert other options and/or padding in between. The current code would throw an error and stop reading in such a case. Since Ack Vectors provide CCID-specific information, they are now processed by the CCID directly, separating this functionality from the main DCCP code. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Diffstat (limited to 'net/dccp/ackvec.c')
-rw-r--r--net/dccp/ackvec.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
index 66b8a51300c0..41819848bdda 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -343,6 +343,34 @@ free_records:
}
}
+/*
+ * Routines to keep track of Ack Vectors received in an skb
+ */
+int dccp_ackvec_parsed_add(struct list_head *head, u8 *vec, u8 len, u8 nonce)
+{
+ struct dccp_ackvec_parsed *new = kmalloc(sizeof(*new), GFP_ATOMIC);
+
+ if (new == NULL)
+ return -ENOBUFS;
+ new->vec = vec;
+ new->len = len;
+ new->nonce = nonce;
+
+ list_add_tail(&new->node, head);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dccp_ackvec_parsed_add);
+
+void dccp_ackvec_parsed_cleanup(struct list_head *parsed_chunks)
+{
+ struct dccp_ackvec_parsed *cur, *next;
+
+ list_for_each_entry_safe(cur, next, parsed_chunks, node)
+ kfree(cur);
+ INIT_LIST_HEAD(parsed_chunks);
+}
+EXPORT_SYMBOL_GPL(dccp_ackvec_parsed_cleanup);
+
int __init dccp_ackvec_init(void)
{
dccp_ackvec_slab = kmem_cache_create("dccp_ackvec",