1 files changed, 0 insertions, 131 deletions
diff --git a/common/native/ip_checksum/checksum.c b/common/native/ip_checksum/checksum.c
deleted file mode 100644
index 5641fad4..00000000
--- a/common/native/ip_checksum/checksum.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright 2011 Daniel Drown
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * checksum.c - ipv4/ipv6 checksum calculation
- */
-#include <netinet/icmp6.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <netinet/ip6.h>
-#include <netinet/ip_icmp.h>
-#include <netinet/tcp.h>
-#include <netinet/udp.h>
-
-#include "checksum.h"
-
-/* function: ip_checksum_add
- * adds data to a checksum. only known to work on little-endian hosts
- * current - the current checksum (or 0 to start a new checksum)
- *   data        - the data to add to the checksum
- *   len         - length of data
- */
-uint32_t ip_checksum_add(uint32_t current, const void* data, int len) {
-    const uint16_t* data_16 = data;
-
-    while (len >= 2) {
-        current += *data_16;
-        data_16++;
-        len -= 2;
-    }
-    if (len) current += *(uint8_t*)data_16;  // assumes little endian!
-
-    return current;
-}
-
-/* function: ip_checksum_fold
- * folds a 32-bit partial checksum into 16 bits
- *   temp_sum - sum from ip_checksum_add
- *   returns: the folded checksum in network byte order
- */
-uint16_t ip_checksum_fold(uint32_t temp_sum) {
-    temp_sum = (temp_sum >> 16) + (temp_sum & 0xFFFF);
-    temp_sum = (temp_sum >> 16) + (temp_sum & 0xFFFF);
-    return temp_sum;
-}
-
-/* function: ip_checksum_finish
- * folds and closes the checksum
- *   temp_sum - sum from ip_checksum_add
- *   returns: a header checksum value in network byte order
- */
-uint16_t ip_checksum_finish(uint32_t temp_sum) {
-    return ~ip_checksum_fold(temp_sum);
-}
-
-/* function: ip_checksum
- * combined ip_checksum_add and ip_checksum_finish
- *   data - data to checksum
- *   len  - length of data
- */
-uint16_t ip_checksum(const void* data, int len) {
-    return ip_checksum_finish(ip_checksum_add(0xFFFF, data, len));
-}
-
-/* function: ipv6_pseudo_header_checksum
- * calculate the pseudo header checksum for use in tcp/udp/icmp headers
- *   ip6      - the ipv6 header
- *   len      - the transport length (transport header + payload)
- *   protocol - the transport layer protocol, can be different from ip6->ip6_nxt for fragments
- */
-uint32_t ipv6_pseudo_header_checksum(const struct ip6_hdr* ip6, uint32_t len, uint8_t protocol) {
-    uint32_t checksum_len = htonl(len);
-    uint32_t checksum_next = htonl(protocol);
-    uint32_t current = 0;
-
-    current = ip_checksum_add(current, &(ip6->ip6_src), sizeof(struct in6_addr));
-    current = ip_checksum_add(current, &(ip6->ip6_dst), sizeof(struct in6_addr));
-    current = ip_checksum_add(current, &checksum_len, sizeof(checksum_len));
-    current = ip_checksum_add(current, &checksum_next, sizeof(checksum_next));
-
-    return current;
-}
-
-/* function: ipv4_pseudo_header_checksum
- * calculate the pseudo header checksum for use in tcp/udp headers
- *   ip      - the ipv4 header
- *   len     - the transport length (transport header + payload)
- */
-uint32_t ipv4_pseudo_header_checksum(const struct iphdr* ip, uint16_t len) {
-    uint16_t temp_protocol = htons(ip->protocol);
-    uint16_t temp_length = htons(len);
-    uint32_t current = 0;
-
-    current = ip_checksum_add(current, &(ip->saddr), sizeof(uint32_t));
-    current = ip_checksum_add(current, &(ip->daddr), sizeof(uint32_t));
-    current = ip_checksum_add(current, &temp_protocol, sizeof(uint16_t));
-    current = ip_checksum_add(current, &temp_length, sizeof(uint16_t));
-
-    return current;
-}
-
-/* function: ip_checksum_adjust
- * calculates a new checksum given a previous checksum and the old and new pseudo-header checksums
- *   checksum    - the header checksum in the original packet in network byte order
- *   old_hdr_sum - the pseudo-header checksum of the original packet
- *   new_hdr_sum - the pseudo-header checksum of the translated packet
- *   returns: the new header checksum in network byte order
- */
-uint16_t ip_checksum_adjust(uint16_t checksum, uint32_t old_hdr_sum, uint32_t new_hdr_sum) {
-    // Algorithm suggested in RFC 1624.
-    // http://tools.ietf.org/html/rfc1624#section-3
-    checksum = ~checksum;
-    uint16_t folded_sum = ip_checksum_fold(new_hdr_sum + checksum);
-    uint16_t folded_old = ip_checksum_fold(old_hdr_sum);
-    if (folded_sum > folded_old) {
-        return ~(folded_sum - folded_old);
-    } else {
-        return ~(folded_sum - folded_old - 1);  // end-around borrow
-    }
-}