--- /dev/null
+/*
+ * 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.
+ */
+/*
+ * ppp.c: ppp support
+ *
+ * Copyright (c) 2010 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/vnet.h>
+#include <vnet/ppp/ppp.h>
+
+/* Global main structure. */
+ppp_main_t ppp_main;
+
+u8 * format_ppp_protocol (u8 * s, va_list * args)
+{
+ ppp_protocol_t p = va_arg (*args, u32);
+ ppp_main_t * pm = &ppp_main;
+ ppp_protocol_info_t * pi = ppp_get_protocol_info (pm, p);
+
+ if (pi)
+ s = format (s, "%s", pi->name);
+ else
+ s = format (s, "0x%04x", p);
+
+ return s;
+}
+
+u8 * format_ppp_header_with_length (u8 * s, va_list * args)
+{
+ ppp_main_t * pm = &ppp_main;
+ ppp_header_t * h = va_arg (*args, ppp_header_t *);
+ u32 max_header_bytes = va_arg (*args, u32);
+ ppp_protocol_t p = clib_net_to_host_u16 (h->protocol);
+ uword indent, header_bytes;
+
+ header_bytes = sizeof (h[0]);
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ return format (s, "ppp header truncated");
+
+ indent = format_get_indent (s);
+
+ s = format (s, "PPP %U", format_ppp_protocol, p);
+
+ if (h->address != 0xff)
+ s = format (s, ", address 0x%02x", h->address);
+ if (h->control != 0x03)
+ s = format (s, ", control 0x%02x", h->control);
+
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ {
+ ppp_protocol_info_t * pi = ppp_get_protocol_info (pm, p);
+ vlib_node_t * node = vlib_get_node (pm->vlib_main, pi->node_index);
+ if (node->format_buffer)
+ s = format (s, "\n%U%U",
+ format_white_space, indent,
+ node->format_buffer, (void *) (h + 1),
+ max_header_bytes - header_bytes);
+ }
+
+ return s;
+}
+
+u8 * format_ppp_header (u8 * s, va_list * args)
+{
+ ppp_header_t * h = va_arg (*args, ppp_header_t *);
+ return format (s, "%U", format_ppp_header_with_length, h, 0);
+}
+
+/* Returns ppp protocol as an int in host byte order. */
+uword
+unformat_ppp_protocol_host_byte_order (unformat_input_t * input,
+ va_list * args)
+{
+ u16 * result = va_arg (*args, u16 *);
+ ppp_main_t * pm = &ppp_main;
+ int p, i;
+
+ /* Numeric type. */
+ if (unformat (input, "0x%x", &p)
+ || unformat (input, "%d", &p))
+ {
+ if (p >= (1 << 16))
+ return 0;
+ *result = p;
+ return 1;
+ }
+
+ /* Named type. */
+ if (unformat_user (input, unformat_vlib_number_by_name,
+ pm->protocol_info_by_name, &i))
+ {
+ ppp_protocol_info_t * pi = vec_elt_at_index (pm->protocol_infos, i);
+ *result = pi->protocol;
+ return 1;
+ }
+
+ return 0;
+}
+
+uword
+unformat_ppp_protocol_net_byte_order (unformat_input_t * input,
+ va_list * args)
+{
+ u16 * result = va_arg (*args, u16 *);
+ if (! unformat_user (input, unformat_ppp_protocol_host_byte_order, result))
+ return 0;
+ *result = clib_host_to_net_u16 ((u16) *result);
+ return 1;
+}
+
+uword
+unformat_ppp_header (unformat_input_t * input, va_list * args)
+{
+ u8 ** result = va_arg (*args, u8 **);
+ ppp_header_t _h, * h = &_h;
+ u16 p;
+
+ if (! unformat (input, "%U",
+ unformat_ppp_protocol_host_byte_order, &p))
+ return 0;
+
+ h->address = 0xff;
+ h->control = 0x03;
+ h->protocol = clib_host_to_net_u16 (p);
+
+ /* Add header to result. */
+ {
+ void * p;
+ u32 n_bytes = sizeof (h[0]);
+
+ vec_add2 (*result, p, n_bytes);
+ memcpy (p, h, n_bytes);
+ }
+
+ return 1;
+}
+
+static uword ppp_set_rewrite (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 l3_type,
+ void * dst_address,
+ void * rewrite,
+ uword max_rewrite_bytes)
+{
+ ppp_header_t * h = rewrite;
+ ppp_protocol_t protocol;
+
+ if (max_rewrite_bytes < sizeof (h[0]))
+ return 0;
+
+ switch (l3_type) {
+#define _(a,b) case VNET_L3_PACKET_TYPE_##a: protocol = PPP_PROTOCOL_##b; break
+ _ (IP4, ip4);
+ _ (IP6, ip6);
+ _ (MPLS_UNICAST, mpls_unicast);
+ _ (MPLS_MULTICAST, mpls_multicast);
+#undef _
+ default:
+ return 0;
+ }
+
+ h->address = 0xff;
+ h->control = 0x03;
+ h->protocol = clib_host_to_net_u16 (protocol);
+
+ return sizeof (h[0]);
+}
+
+VNET_HW_INTERFACE_CLASS (ppp_hw_interface_class) = {
+ .name = "PPP",
+ .format_header = format_ppp_header_with_length,
+ .unformat_header = unformat_ppp_header,
+ .set_rewrite = ppp_set_rewrite,
+};
+
+static void add_protocol (ppp_main_t * pm,
+ ppp_protocol_t protocol,
+ char * protocol_name)
+{
+ ppp_protocol_info_t * pi;
+ u32 i;
+
+ vec_add2 (pm->protocol_infos, pi, 1);
+ i = pi - pm->protocol_infos;
+
+ pi->name = protocol_name;
+ pi->protocol = protocol;
+ pi->next_index = pi->node_index = ~0;
+
+ hash_set (pm->protocol_info_by_protocol, protocol, i);
+ hash_set_mem (pm->protocol_info_by_name, pi->name, i);
+}
+
+static clib_error_t * ppp_init (vlib_main_t * vm)
+{
+ ppp_main_t * pm = &ppp_main;
+
+ memset (pm, 0, sizeof (pm[0]));
+ pm->vlib_main = vm;
+
+ pm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
+ pm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
+
+#define _(n,s) add_protocol (pm, PPP_PROTOCOL_##s, #s);
+ foreach_ppp_protocol;
+#undef _
+
+ return vlib_call_init_function (vm, ppp_input_init);
+}
+
+VLIB_INIT_FUNCTION (ppp_init);
+
+ppp_main_t * ppp_get_main (vlib_main_t * vm)
+{
+ vlib_call_init_function (vm, ppp_init);
+ return &ppp_main;
+}
+
Code Review / vpp.git / blobdiff