Move libipchecksum to frameworks/libs/net.
Test: m
Change-Id: I7dfaef630a3415c30025e572a8981fadd44ee5e3
diff --git a/libnetutils/Android.bp b/libnetutils/Android.bp
index 2864ad0..02bd2e3 100644
--- a/libnetutils/Android.bp
+++ b/libnetutils/Android.bp
@@ -23,7 +23,6 @@
},
srcs: [
- "checksum.c",
"dhcpclient.c",
"dhcpmsg.c",
"ifc_utils.c",
@@ -35,6 +34,10 @@
"liblog",
],
+ static_libs: [
+ "libip_checksum",
+ ],
+
cflags: ["-Werror"],
export_include_dirs: ["include"],
@@ -45,21 +48,6 @@
],
}
-cc_library_static {
- name: "libipchecksum",
-
- srcs: [
- "checksum.c",
- ],
-
- cflags: [
- "-Wall",
- "-Werror",
- ],
-
- export_include_dirs: ["include"],
-}
-
cc_binary {
name: "dhcpdbg",
diff --git a/libnetutils/checksum.c b/libnetutils/checksum.c
deleted file mode 100644
index 74b5fdd..0000000
--- a/libnetutils/checksum.c
+++ /dev/null
@@ -1,145 +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 "netutils/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) {
- uint32_t checksum = current;
- int left = len;
- const uint16_t* data_16 = data;
-
- while (left > 1) {
- checksum += *data_16;
- data_16++;
- left -= 2;
- }
- if (left) {
- checksum += *(uint8_t*)data_16;
- }
-
- return checksum;
-}
-
-/* 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) {
- while (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) {
- // TODO: consider starting from 0xffff so the checksum of a buffer entirely consisting of zeros
- // is correctly calculated as 0.
- uint32_t temp_sum;
-
- temp_sum = ip_checksum_add(0, data, len);
- return ip_checksum_finish(temp_sum);
-}
-
-/* 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, temp_length;
-
- temp_protocol = htons(ip->protocol);
- 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(checksum + new_hdr_sum);
- 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
- }
-}
diff --git a/libnetutils/include/netutils/checksum.h b/libnetutils/include/netutils/checksum.h
deleted file mode 100644
index 868217c..0000000
--- a/libnetutils/include/netutils/checksum.h
+++ /dev/null
@@ -1,34 +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.h - checksum functions
- */
-#ifndef __CHECKSUM_H__
-#define __CHECKSUM_H__
-
-#include <netinet/ip.h>
-#include <netinet/ip6.h>
-#include <stdint.h>
-
-uint32_t ip_checksum_add(uint32_t current, const void* data, int len);
-uint16_t ip_checksum_finish(uint32_t temp_sum);
-uint16_t ip_checksum(const void* data, int len);
-
-uint32_t ipv6_pseudo_header_checksum(const struct ip6_hdr* ip6, uint32_t len, uint8_t protocol);
-uint32_t ipv4_pseudo_header_checksum(const struct iphdr* ip, uint16_t len);
-
-uint16_t ip_checksum_adjust(uint16_t checksum, uint32_t old_hdr_sum, uint32_t new_hdr_sum);
-
-#endif /* __CHECKSUM_H__ */