/* * Copyright (c) 2015-2019 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. */ /* * tcp/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> #include <vnet/tcp/tcp.h> u8 * format_tcp_flags (u8 * s, va_list * args) { int flags = va_arg (*args, int); s = format (s, "0x%02x", flags); #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; u32 indent; /* Nothing to do. */ if (max_header_bytes < sizeof (tcp[0])) return format (s, "TCP header truncated"); indent = format_get_indent (s); indent += 2; header_bytes = tcp_header_bytes (tcp); s = format (s, "TCP: %d -> %d", clib_net_to_host_u16 (tcp->src), clib_net_to_host_u16 (tcp->dst)); s = format (s, "\n%Useq. 0x%08x ack 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, header_bytes); 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)); #if 0 /* Format TCP options. */ { 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_NOOP: 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->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; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */