diff options
Diffstat (limited to 'vnet/vnet/ip/tcp_format.c')
| -rw-r--r-- | vnet/vnet/ip/tcp_format.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/vnet/vnet/ip/tcp_format.c b/vnet/vnet/ip/tcp_format.c new file mode 100644 index 00000000000..afc3dd20c49 --- /dev/null +++ b/vnet/vnet/ip/tcp_format.c @@ -0,0 +1,132 @@ +/* + * 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/tcp_format.c: tcp 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 <vnet/ip/ip.h> + +static u8 * format_tcp_flags (u8 * s, va_list * args) +{ + int flags = va_arg (*args, int); + +#define _(f) if (flags & TCP_FLAG_##f) s = format (s, "%s, ", #f); + foreach_tcp_flag +#undef _ + + return s; +} + +/* Format TCP header. */ +u8 * format_tcp_header (u8 * s, va_list * args) +{ + tcp_header_t * tcp = va_arg (*args, tcp_header_t *); + u32 max_header_bytes = va_arg (*args, u32); + u32 header_bytes; + uword indent; + + /* Nothing to do. */ + if (max_header_bytes < sizeof (tcp[0])) + return format (s, "TCP header truncated"); + + indent = format_get_indent (s); + indent += 2; + + s = format (s, "TCP: %d -> %d", + clib_net_to_host_u16 (tcp->ports.src), + clib_net_to_host_u16 (tcp->ports.dst)); + + s = format (s, "\n%Useq. tx 0x%08x rx 0x%08x", + format_white_space, indent, + clib_net_to_host_u32 (tcp->seq_number), + clib_net_to_host_u32 (tcp->ack_number)); + + s = format (s, "\n%Uflags %U, tcp header: %d bytes", + format_white_space, indent, + format_tcp_flags, tcp->flags, + (tcp->tcp_header_u32s_and_reserved >> 4) * sizeof (u32)); + + s = format (s, "\n%Uwindow %d, checksum 0x%04x", + format_white_space, indent, + clib_net_to_host_u16 (tcp->window), + clib_net_to_host_u16 (tcp->checksum)); + + header_bytes = tcp_header_bytes (tcp); + + /* Format TCP options. */ +#if 0 + { + u8 * o; + u8 * option_start = (void *) (tcp + 1); + u8 * option_end = (void *) tcp + header_bytes; + + for (o = option_start; o < option_end; ) + { + u32 length = o[1]; + switch (o[0]) + { + case TCP_OPTION_END: + length = 1; + o = option_end; + break; + + case TCP_OPTION_NOP: + length = 1; + break; + + } + } + } +#endif + + /* Recurse into next protocol layer. */ + if (max_header_bytes != 0 && header_bytes < max_header_bytes) + { + ip_main_t * im = &ip_main; + tcp_udp_port_info_t * pi; + + pi = ip_get_tcp_udp_port_info (im, tcp->ports.dst); + + if (pi && pi->format_header) + s = format (s, "\n%U%U", + format_white_space, indent - 2, + pi->format_header, + /* next protocol header */ (void*) tcp + header_bytes, + max_header_bytes - header_bytes); + } + + return s; +} |