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ofproto-dpif: Add SCTP support

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Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Joe Stringer
2013-08-22 20:24:44 +12:00
committed by Ben Pfaff
parent 10f72e3da9
commit c6bcb68592
7 changed files with 159 additions and 5 deletions
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22
lib/packets.c
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@@ -23,6 +23,7 @@
#include <stdlib.h>
#include "byte-order.h"
#include "csum.h"
#include "crc32c.h"
#include "flow.h"
#include "hmap.h"
#include "dynamic-string.h"
@@ -885,6 +886,27 @@ packet_set_udp_port(struct ofpbuf *packet, ovs_be16 src, ovs_be16 dst)
}
}
/* Sets the SCTP source and destination port ('src' and 'dst' respectively) of
* the SCTP header contained in 'packet'. 'packet' must be a valid SCTP packet
* with its l4 marker properly populated. */
void
packet_set_sctp_port(struct ofpbuf *packet, ovs_be16 src, ovs_be16 dst)
{
struct sctp_header *sh = packet->l4;
ovs_be32 old_csum, old_correct_csum, new_csum;
uint16_t tp_len = packet->size - ((uint8_t*)sh - (uint8_t*)packet->data);
old_csum = sh->sctp_csum;
sh->sctp_csum = 0;
old_correct_csum = crc32c(packet->l4, tp_len);
sh->sctp_src = src;
sh->sctp_dst = dst;
new_csum = crc32c(packet->l4, tp_len);
sh->sctp_csum = old_csum ^ old_correct_csum ^ new_csum;
}
/* If 'packet' is a TCP packet, returns the TCP flags. Otherwise, returns 0.
*
* 'flow' must be the flow corresponding to 'packet' and 'packet''s header