From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vnet/ip/ip4_format.c | 256 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 src/vnet/ip/ip4_format.c (limited to 'src/vnet/ip/ip4_format.c') diff --git a/src/vnet/ip/ip4_format.c b/src/vnet/ip/ip4_format.c new file mode 100644 index 00000000..c803e065 --- /dev/null +++ b/src/vnet/ip/ip4_format.c @@ -0,0 +1,256 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * 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. + */ +/* + * ip/ip4_format.c: ip4 formatting + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include + +/* Format an IP4 address. */ +u8 * +format_ip4_address (u8 * s, va_list * args) +{ + u8 *a = va_arg (*args, u8 *); + return format (s, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]); +} + +/* Format an IP4 route destination and length. */ +u8 * +format_ip4_address_and_length (u8 * s, va_list * args) +{ + u8 *a = va_arg (*args, u8 *); + u8 l = va_arg (*args, u32); + return format (s, "%U/%d", format_ip4_address, a, l); +} + +/* Parse an IP4 address %d.%d.%d.%d. */ +uword +unformat_ip4_address (unformat_input_t * input, va_list * args) +{ + u8 *result = va_arg (*args, u8 *); + unsigned a[4]; + + if (!unformat (input, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3])) + return 0; + + if (a[0] >= 256 || a[1] >= 256 || a[2] >= 256 || a[3] >= 256) + return 0; + + result[0] = a[0]; + result[1] = a[1]; + result[2] = a[2]; + result[3] = a[3]; + + return 1; +} + +/* Format an IP4 header. */ +u8 * +format_ip4_header (u8 * s, va_list * args) +{ + ip4_header_t *ip = va_arg (*args, ip4_header_t *); + u32 max_header_bytes = va_arg (*args, u32); + u32 ip_version, header_bytes; + uword indent; + + /* Nothing to do. */ + if (max_header_bytes < sizeof (ip[0])) + return format (s, "IP header truncated"); + + indent = format_get_indent (s); + indent += 2; + + ip_version = (ip->ip_version_and_header_length >> 4); + header_bytes = (ip->ip_version_and_header_length & 0xf) * sizeof (u32); + + s = format (s, "%U: %U -> %U", + format_ip_protocol, ip->protocol, + format_ip4_address, ip->src_address.data, + format_ip4_address, ip->dst_address.data); + + /* Show IP version and header length only with unexpected values. */ + if (ip_version != 4 || header_bytes != sizeof (ip4_header_t)) + s = format (s, "\n%Uversion %d, header length %d", + format_white_space, indent, ip_version, header_bytes); + + s = format (s, "\n%Utos 0x%02x, ttl %d, length %d, checksum 0x%04x", + format_white_space, indent, + ip->tos, ip->ttl, + clib_net_to_host_u16 (ip->length), + clib_net_to_host_u16 (ip->checksum)); + + /* Check and report invalid checksums. */ + { + u16 c = ip4_header_checksum (ip); + if (c != ip->checksum) + s = format (s, " (should be 0x%04x)", clib_net_to_host_u16 (c)); + } + + { + u32 f = clib_net_to_host_u16 (ip->flags_and_fragment_offset); + u32 o; + + s = format (s, "\n%Ufragment id 0x%04x", + format_white_space, indent, + clib_net_to_host_u16 (ip->fragment_id)); + + /* Fragment offset. */ + o = 8 * (f & 0x1fff); + f ^= o; + if (o != 0) + s = format (s, " offset %d", o); + + if (f != 0) + { + s = format (s, ", flags "); +#define _(l) if (f & IP4_HEADER_FLAG_##l) s = format (s, #l); + _(MORE_FRAGMENTS); + _(DONT_FRAGMENT); + _(CONGESTION); +#undef _ + } + } + + /* Recurse into next protocol layer. */ + if (max_header_bytes != 0 && header_bytes < max_header_bytes) + { + ip_main_t *im = &ip_main; + ip_protocol_info_t *pi = ip_get_protocol_info (im, ip->protocol); + + if (pi && pi->format_header) + s = format (s, "\n%U%U", + format_white_space, indent - 2, pi->format_header, + /* next protocol header */ (void *) ip + header_bytes, + max_header_bytes - header_bytes); + } + + return s; +} + +/* Parse an IP4 header. */ +uword +unformat_ip4_header (unformat_input_t * input, va_list * args) +{ + u8 **result = va_arg (*args, u8 **); + ip4_header_t *ip; + int old_length; + + /* Allocate space for IP header. */ + { + void *p; + + old_length = vec_len (*result); + vec_add2 (*result, p, sizeof (ip4_header_t)); + ip = p; + } + + memset (ip, 0, sizeof (ip[0])); + ip->ip_version_and_header_length = IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; + + if (!unformat (input, "%U: %U -> %U", + unformat_ip_protocol, &ip->protocol, + unformat_ip4_address, &ip->src_address, + unformat_ip4_address, &ip->dst_address)) + return 0; + + /* Parse options. */ + while (1) + { + int i, j; + + if (unformat (input, "tos %U", unformat_vlib_number, &i)) + ip->tos = i; + + else if (unformat (input, "ttl %U", unformat_vlib_number, &i)) + ip->ttl = i; + + else if (unformat (input, "fragment id %U offset %U", + unformat_vlib_number, &i, unformat_vlib_number, &j)) + { + ip->fragment_id = clib_host_to_net_u16 (i); + ip->flags_and_fragment_offset |= + clib_host_to_net_u16 ((i / 8) & 0x1fff); + } + + /* Flags. */ + else if (unformat (input, "mf") || unformat (input, "MF")) + ip->flags_and_fragment_offset |= + clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); + + else if (unformat (input, "df") || unformat (input, "DF")) + ip->flags_and_fragment_offset |= + clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT); + + else if (unformat (input, "ce") || unformat (input, "CE")) + ip->flags_and_fragment_offset |= + clib_host_to_net_u16 (IP4_HEADER_FLAG_CONGESTION); + + /* Can't parse input: try next protocol level. */ + else + break; + } + + /* Fill in checksum. */ + ip->checksum = ip4_header_checksum (ip); + + /* Recurse into next protocol layer. */ + { + ip_main_t *im = &ip_main; + ip_protocol_info_t *pi = ip_get_protocol_info (im, ip->protocol); + + if (pi && pi->unformat_header) + { + if (!unformat_user (input, pi->unformat_header, result)) + return 0; + + /* Result may have moved. */ + ip = (void *) *result + old_length; + } + } + + /* Fill in IP length. */ + ip->length = clib_host_to_net_u16 (vec_len (*result) - old_length); + + return 1; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg