summaryrefslogtreecommitdiffstats
path: root/src/vnet/tcp/tcp_format.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/vnet/tcp/tcp_format.c')
-rw-r--r--src/vnet/tcp/tcp_format.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp_format.c b/src/vnet/tcp/tcp_format.c
new file mode 100644
index 00000000000..7136741d212
--- /dev/null
+++ b/src/vnet/tcp/tcp_format.c
@@ -0,0 +1,136 @@
+/*
+ * 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.
+ */
+/*
+ * 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>
+
+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;
+ 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:
+ */