diff options
author | RajithaY <rajithax.yerrumsetty@intel.com> | 2017-04-25 03:31:15 -0700 |
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committer | Rajitha Yerrumchetty <rajithax.yerrumsetty@intel.com> | 2017-05-22 06:48:08 +0000 |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/net/checksum.c | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/net/checksum.c')
-rw-r--r-- | qemu/net/checksum.c | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/qemu/net/checksum.c b/qemu/net/checksum.c deleted file mode 100644 index d0fa424cc..000000000 --- a/qemu/net/checksum.c +++ /dev/null @@ -1,122 +0,0 @@ -/* - * IP checksumming functions. - * (c) 2008 Gerd Hoffmann <kraxel@redhat.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; under version 2 or later of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "qemu/osdep.h" -#include "qemu-common.h" -#include "net/checksum.h" - -#define PROTO_TCP 6 -#define PROTO_UDP 17 - -uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq) -{ - uint32_t sum = 0; - int i; - - for (i = seq; i < seq + len; i++) { - if (i & 1) { - sum += (uint32_t)buf[i - seq]; - } else { - sum += (uint32_t)buf[i - seq] << 8; - } - } - return sum; -} - -uint16_t net_checksum_finish(uint32_t sum) -{ - while (sum>>16) - sum = (sum & 0xFFFF)+(sum >> 16); - return ~sum; -} - -uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto, - uint8_t *addrs, uint8_t *buf) -{ - uint32_t sum = 0; - - sum += net_checksum_add(length, buf); // payload - sum += net_checksum_add(8, addrs); // src + dst address - sum += proto + length; // protocol & length - return net_checksum_finish(sum); -} - -void net_checksum_calculate(uint8_t *data, int length) -{ - int hlen, plen, proto, csum_offset; - uint16_t csum; - - /* Ensure data has complete L2 & L3 headers. */ - if (length < 14 + 20) { - return; - } - - if ((data[14] & 0xf0) != 0x40) - return; /* not IPv4 */ - hlen = (data[14] & 0x0f) * 4; - plen = (data[16] << 8 | data[17]) - hlen; - proto = data[23]; - - switch (proto) { - case PROTO_TCP: - csum_offset = 16; - break; - case PROTO_UDP: - csum_offset = 6; - break; - default: - return; - } - - if (plen < csum_offset + 2 || 14 + hlen + plen > length) { - return; - } - - data[14+hlen+csum_offset] = 0; - data[14+hlen+csum_offset+1] = 0; - csum = net_checksum_tcpudp(plen, proto, data+14+12, data+14+hlen); - data[14+hlen+csum_offset] = csum >> 8; - data[14+hlen+csum_offset+1] = csum & 0xff; -} - -uint32_t -net_checksum_add_iov(const struct iovec *iov, const unsigned int iov_cnt, - uint32_t iov_off, uint32_t size) -{ - size_t iovec_off, buf_off; - unsigned int i; - uint32_t res = 0; - uint32_t seq = 0; - - iovec_off = 0; - buf_off = 0; - for (i = 0; i < iov_cnt && size; i++) { - if (iov_off < (iovec_off + iov[i].iov_len)) { - size_t len = MIN((iovec_off + iov[i].iov_len) - iov_off , size); - void *chunk_buf = iov[i].iov_base + (iov_off - iovec_off); - - res += net_checksum_add_cont(len, chunk_buf, seq); - seq += len; - - buf_off += len; - iov_off += len; - size -= len; - } - iovec_off += iov[i].iov_len; - } - return res; -} |