cdp_main_t cdp_main;
-#define DEBUG_TLV_DUMP 0 /* 1=> dump TLV's to stdout while processing them */
+#define DEBUG_TLV_DUMP 0 /* 1=> dump TLV's to stdout while processing them */
/* Reliable multicast messages we use to keep peers updated */
mc_serialize_msg_t serialize_cdp_neighbor_msg;
* ported from an unspecified Cisco cdp implementation.
* Compute / return in HOST byte order. 0 => good checksum.
*/
-u16 cdp_checksum (void *p, int count)
+u16
+cdp_checksum (void *p, int count)
{
- u32 sum;
- u16 i, *data;
-
- data = p;
- sum = 0;
- while (count > 1) {
- sum += ntohs(*data);
- data++;
- count -= 2;
+ u32 sum;
+ u16 i, *data;
+
+ data = p;
+ sum = 0;
+ while (count > 1)
+ {
+ sum += ntohs (*data);
+ data++;
+ count -= 2;
}
- if (count > 0)
- sum += *(char *)data;
+ if (count > 0)
+ sum += *(char *) data;
- while (sum >> 16) {
- sum = (sum & 0xFFFF) + (sum >> 16);
+ while (sum >> 16)
+ {
+ sum = (sum & 0xFFFF) + (sum >> 16);
}
- i = (i16) sum;
- return (~i);
+ i = (i16) sum;
+ return (~i);
}
/* TLV handler table */
-typedef struct {
- char *name;
- u32 tlv_id;
- void *format;
- void *process;
+typedef struct
+{
+ char *name;
+ u32 tlv_id;
+ void *format;
+ void *process;
} tlv_handler_t;
-static tlv_handler_t tlv_handlers [];
+static tlv_handler_t tlv_handlers[];
/* Display a generic TLV as a set of hex bytes */
-static u8 * format_generic_tlv (u8 * s, va_list * va)
+static u8 *
+format_generic_tlv (u8 * s, va_list * va)
{
- cdp_tlv_t *t = va_arg (*va, cdp_tlv_t *);
- tlv_handler_t *h = &tlv_handlers[t->t];
+ cdp_tlv_t *t = va_arg (*va, cdp_tlv_t *);
+ tlv_handler_t *h = &tlv_handlers[t->t];
- s = format (s, "%s(%d): %U\n", h->name,
- t->t, format_hex_bytes, t->v, t->l - sizeof (*t));
- return s;
+ s = format (s, "%s(%d): %U\n", h->name,
+ t->t, format_hex_bytes, t->v, t->l - sizeof (*t));
+ return s;
}
/* Ignore / skip a TLV we don't support */
-static cdp_error_t process_generic_tlv (cdp_main_t *cm, cdp_neighbor_t *n,
- cdp_tlv_t *t)
+static cdp_error_t
+process_generic_tlv (cdp_main_t * cm, cdp_neighbor_t * n, cdp_tlv_t * t)
{
#if DEBUG_TLV_DUMP > 0
- fformat(stdout, "%U", format_generic_tlv, t);
+ fformat (stdout, "%U", format_generic_tlv, t);
#endif
- return CDP_ERROR_NONE;
+ return CDP_ERROR_NONE;
}
/* print a text tlv */
-static u8 * format_text_tlv (u8 * s, va_list * va)
+static u8 *
+format_text_tlv (u8 * s, va_list * va)
{
- cdp_tlv_t *t = va_arg (*va, cdp_tlv_t *);
- tlv_handler_t *h = &tlv_handlers[t->t];
- int i;
-
- s = format (s, "%s(%d): ", h->name, t->t);
+ cdp_tlv_t *t = va_arg (*va, cdp_tlv_t *);
+ tlv_handler_t *h = &tlv_handlers[t->t];
+ int i;
+
+ s = format (s, "%s(%d): ", h->name, t->t);
- for (i = 0; i < (t->l - sizeof (*t)); i++)
- vec_add1(s, t->v[i]);
+ for (i = 0; i < (t->l - sizeof (*t)); i++)
+ vec_add1 (s, t->v[i]);
- vec_add1(s, '\n');
- return s;
+ vec_add1 (s, '\n');
+ return s;
}
#if DEBUG_TLV_DUMP == 0
/* gcc warning be gone */
-CLIB_UNUSED (static cdp_error_t
- process_text_tlv (cdp_main_t *cm, cdp_neighbor_t *n,
- cdp_tlv_t *t));
+CLIB_UNUSED (static cdp_error_t
+ process_text_tlv (cdp_main_t * cm, cdp_neighbor_t * n,
+ cdp_tlv_t * t));
#endif
/* process / skip a generic text TLV that we don't support */
-static cdp_error_t process_text_tlv (cdp_main_t *cm, cdp_neighbor_t *n,
- cdp_tlv_t *t)
+static cdp_error_t
+process_text_tlv (cdp_main_t * cm, cdp_neighbor_t * n, cdp_tlv_t * t)
{
#if DEBUG_TLV_DUMP > 0
- fformat(stdout, "%U\n", format_text_tlv, t);
+ fformat (stdout, "%U\n", format_text_tlv, t);
#endif
- return CDP_ERROR_NONE;
+ return CDP_ERROR_NONE;
}
/* per-TLV format function definitions */
#define format_spare_poe_tlv format_generic_tlv
/* tlv ID=0 is a mistake */
-static cdp_error_t process_unused_tlv (cdp_main_t *cm, cdp_neighbor_t *n,
- cdp_tlv_t *t)
+static cdp_error_t
+process_unused_tlv (cdp_main_t * cm, cdp_neighbor_t * n, cdp_tlv_t * t)
{
- return CDP_ERROR_BAD_TLV;
+ return CDP_ERROR_BAD_TLV;
}
/* list of text TLV's that we snapshoot */
if (dbg) \
fformat(stdout, "%U\n", format_text_tlv, t); \
\
- if (n->z) \
- _vec_len(n->z) = 0; \
+ if (n->z) \
+ _vec_len(n->z) = 0; \
\
for (i = 0; i < (t->l - sizeof (*t)); i++) \
- vec_add1(n->z, t->v[i]); \
+ vec_add1(n->z, t->v[i]); \
\
- vec_add1(n->z, 0); \
+ vec_add1(n->z, 0); \
\
return CDP_ERROR_NONE; \
}
foreach_text_to_struct_tlv
#undef _
-
#define process_address_tlv process_generic_tlv
#define process_capabilities_tlv process_generic_tlv
#define process_ipprefix_tlv process_generic_tlv
#define process_energywise_tlv process_generic_tlv
#define process_unknown_30_tlv process_generic_tlv
#define process_spare_poe_tlv process_generic_tlv
-
-static tlv_handler_t tlv_handlers [] =
-{
+static tlv_handler_t tlv_handlers[] = {
#define _(a) {#a, CDP_TLV_##a, format_##a##_tlv, process_##a##_tlv},
- foreach_cdp_tlv_type
+ foreach_cdp_tlv_type
#undef _
};
#if DEBUG_TLV_DUMP == 0
-CLIB_UNUSED(static u8 * format_cdp_hdr (u8 * s, va_list * va));
+CLIB_UNUSED (static u8 * format_cdp_hdr (u8 * s, va_list * va));
#endif
-static u8 * format_cdp_hdr (u8 * s, va_list * va)
+static u8 *
+format_cdp_hdr (u8 * s, va_list * va)
{
- cdp_hdr_t *h = va_arg (*va, cdp_hdr_t *);
+ cdp_hdr_t *h = va_arg (*va, cdp_hdr_t *);
- s = format (s, "version %d, ttl %d(secs), cksum 0x%04x\n",
- h->version, h->ttl, h->checksum);
- return s;
+ s = format (s, "version %d, ttl %d(secs), cksum 0x%04x\n",
+ h->version, h->ttl, h->checksum);
+ return s;
}
-static cdp_error_t process_cdp_hdr (cdp_main_t *cm, cdp_neighbor_t *n,
- cdp_hdr_t *h)
+static cdp_error_t
+process_cdp_hdr (cdp_main_t * cm, cdp_neighbor_t * n, cdp_hdr_t * h)
{
#if DEBUG_TLV_DUMP > 0
- fformat(stdout, "%U", format_cdp_hdr, h);
+ fformat (stdout, "%U", format_cdp_hdr, h);
#endif
- if (h->version != 1 && h->version != 2)
- return CDP_ERROR_PROTOCOL_VERSION;
+ if (h->version != 1 && h->version != 2)
+ return CDP_ERROR_PROTOCOL_VERSION;
- n->ttl_in_seconds = h->ttl;
+ n->ttl_in_seconds = h->ttl;
- return CDP_ERROR_NONE;
+ return CDP_ERROR_NONE;
}
/* scan a cdp packet; header, then tlv's */
-static int cdp_packet_scan (cdp_main_t *cm, cdp_neighbor_t *n)
+static int
+cdp_packet_scan (cdp_main_t * cm, cdp_neighbor_t * n)
{
- u8 *cur = n->last_rx_pkt;
- cdp_hdr_t *h;
- cdp_tlv_t *tlv;
- cdp_error_t e = CDP_ERROR_NONE;
- tlv_handler_t *handler;
- cdp_error_t (*fp)(cdp_main_t *, cdp_neighbor_t *, cdp_tlv_t *);
- u16 computed_checksum;
+ u8 *cur = n->last_rx_pkt;
+ cdp_hdr_t *h;
+ cdp_tlv_t *tlv;
+ cdp_error_t e = CDP_ERROR_NONE;
+ tlv_handler_t *handler;
+ cdp_error_t (*fp) (cdp_main_t *, cdp_neighbor_t *, cdp_tlv_t *);
+ u16 computed_checksum;
- computed_checksum = cdp_checksum (cur, vec_len(cur));
+ computed_checksum = cdp_checksum (cur, vec_len (cur));
- if (computed_checksum)
- return CDP_ERROR_CHECKSUM;
+ if (computed_checksum)
+ return CDP_ERROR_CHECKSUM;
- h = (cdp_hdr_t *)cur;
+ h = (cdp_hdr_t *) cur;
- e = process_cdp_hdr (cm, n, h);
- if (e)
- return e;
+ e = process_cdp_hdr (cm, n, h);
+ if (e)
+ return e;
- cur = (u8 *)(h+1);
-
- while (cur < n->last_rx_pkt + vec_len (n->last_rx_pkt) - 1) {
- tlv = (cdp_tlv_t *)cur;
- tlv->t = ntohs(tlv->t);
- tlv->l = ntohs(tlv->l);
- if (tlv->t >= ARRAY_LEN(tlv_handlers))
- return CDP_ERROR_BAD_TLV;
- handler = &tlv_handlers[tlv->t];
- fp = handler->process;
- e = (*fp)(cm, n, tlv);
- if (e)
- return e;
- /* tlv length includes (t, l) */
- cur += tlv->l;
+ cur = (u8 *) (h + 1);
+
+ while (cur < n->last_rx_pkt + vec_len (n->last_rx_pkt) - 1)
+ {
+ tlv = (cdp_tlv_t *) cur;
+ tlv->t = ntohs (tlv->t);
+ tlv->l = ntohs (tlv->l);
+ if (tlv->t >= ARRAY_LEN (tlv_handlers))
+ return CDP_ERROR_BAD_TLV;
+ handler = &tlv_handlers[tlv->t];
+ fp = handler->process;
+ e = (*fp) (cm, n, tlv);
+ if (e)
+ return e;
+ /* tlv length includes (t, l) */
+ cur += tlv->l;
}
-
- return CDP_ERROR_NONE;
+
+ return CDP_ERROR_NONE;
}
/*
* cdp input routine
*/
-cdp_error_t cdp_input (vlib_main_t *vm, vlib_buffer_t * b0, u32 bi0)
+cdp_error_t
+cdp_input (vlib_main_t * vm, vlib_buffer_t * b0, u32 bi0)
{
- cdp_main_t * cm = &cdp_main;
- cdp_neighbor_t *n;
- uword *p, nbytes;
- cdp_error_t e;
- uword last_packet_signature;
-
- /* find or create a neighbor pool entry for the (sw) interface
- upon which we received this pkt */
- p = hash_get (cm->neighbor_by_sw_if_index,
- vnet_buffer(b0)->sw_if_index[VLIB_RX]);
-
- if (p == 0) {
- pool_get (cm->neighbors, n);
- memset (n, 0, sizeof (*n));
- n->sw_if_index = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- n->packet_template_index = (u8)~0;
- hash_set (cm->neighbor_by_sw_if_index, n->sw_if_index,
- n - cm->neighbors);
- } else {
- n = pool_elt_at_index (cm->neighbors, p[0]);
+ cdp_main_t *cm = &cdp_main;
+ cdp_neighbor_t *n;
+ uword *p, nbytes;
+ cdp_error_t e;
+ uword last_packet_signature;
+
+ /* find or create a neighbor pool entry for the (sw) interface
+ upon which we received this pkt */
+ p = hash_get (cm->neighbor_by_sw_if_index,
+ vnet_buffer (b0)->sw_if_index[VLIB_RX]);
+
+ if (p == 0)
+ {
+ pool_get (cm->neighbors, n);
+ memset (n, 0, sizeof (*n));
+ n->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ n->packet_template_index = (u8) ~ 0;
+ hash_set (cm->neighbor_by_sw_if_index, n->sw_if_index,
+ n - cm->neighbors);
+ }
+ else
+ {
+ n = pool_elt_at_index (cm->neighbors, p[0]);
}
- /*
- * typical clib idiom. Don't repeatedly allocate and free
- * the per-neighbor rx buffer. Reset its apparent length to zero
- * and reuse it.
- */
-
- if (n->last_rx_pkt)
- _vec_len (n->last_rx_pkt) = 0;
-
- /* cdp disabled on this interface, we're done */
- if (n->disabled)
- return CDP_ERROR_DISABLED;
-
- /*
- * Make sure the per-neighbor rx buffer is big enough to hold
- * the data we're about to copy
- */
- vec_validate (n->last_rx_pkt, vlib_buffer_length_in_chain (vm, b0)-1);
-
- /*
- * Coalesce / copy e the buffer chain into the per-neighbor
- * rx buffer
- */
- nbytes = vlib_buffer_contents (vm, bi0, n->last_rx_pkt);
- ASSERT(nbytes <= vec_len (n->last_rx_pkt));
-
- /*
- * Compute Jenkins hash of the new packet, decide if we need to
- * actually parse through the TLV's. CDP packets are all identical,
- * so unless we time out the peer, we don't need to process the packet.
- */
- last_packet_signature =
- hash_memory (n->last_rx_pkt, vec_len (n->last_rx_pkt), 0xd00b);
-
- if (n->last_packet_signature_valid &&
- n->last_packet_signature == last_packet_signature) {
- e = CDP_ERROR_CACHE_HIT;
- } else {
- /* Actually scan the packet */
- e = cdp_packet_scan (cm, n);
- n->last_packet_signature_valid = 1;
- n->last_packet_signature = last_packet_signature;
+ /*
+ * typical clib idiom. Don't repeatedly allocate and free
+ * the per-neighbor rx buffer. Reset its apparent length to zero
+ * and reuse it.
+ */
+
+ if (n->last_rx_pkt)
+ _vec_len (n->last_rx_pkt) = 0;
+
+ /* cdp disabled on this interface, we're done */
+ if (n->disabled)
+ return CDP_ERROR_DISABLED;
+
+ /*
+ * Make sure the per-neighbor rx buffer is big enough to hold
+ * the data we're about to copy
+ */
+ vec_validate (n->last_rx_pkt, vlib_buffer_length_in_chain (vm, b0) - 1);
+
+ /*
+ * Coalesce / copy e the buffer chain into the per-neighbor
+ * rx buffer
+ */
+ nbytes = vlib_buffer_contents (vm, bi0, n->last_rx_pkt);
+ ASSERT (nbytes <= vec_len (n->last_rx_pkt));
+
+ /*
+ * Compute Jenkins hash of the new packet, decide if we need to
+ * actually parse through the TLV's. CDP packets are all identical,
+ * so unless we time out the peer, we don't need to process the packet.
+ */
+ last_packet_signature =
+ hash_memory (n->last_rx_pkt, vec_len (n->last_rx_pkt), 0xd00b);
+
+ if (n->last_packet_signature_valid &&
+ n->last_packet_signature == last_packet_signature)
+ {
+ e = CDP_ERROR_CACHE_HIT;
+ }
+ else
+ {
+ /* Actually scan the packet */
+ e = cdp_packet_scan (cm, n);
+ n->last_packet_signature_valid = 1;
+ n->last_packet_signature = last_packet_signature;
}
- if (e == CDP_ERROR_NONE) {
- n->last_heard = vlib_time_now (vm);
+ if (e == CDP_ERROR_NONE)
+ {
+ n->last_heard = vlib_time_now (vm);
}
- return e;
+ return e;
}
/*
* setup neighbor hash table
*/
-static clib_error_t *cdp_init (vlib_main_t *vm)
+static clib_error_t *
+cdp_init (vlib_main_t * vm)
{
- clib_error_t * error;
- cdp_main_t *cm = &cdp_main;
- void vnet_cdp_node_reference(void);
+ clib_error_t *error;
+ cdp_main_t *cm = &cdp_main;
+ void vnet_cdp_node_reference (void);
- vnet_cdp_node_reference();
+ vnet_cdp_node_reference ();
- if ((error = vlib_call_init_function (vm, cdp_periodic_init)))
- return error;
+ if ((error = vlib_call_init_function (vm, cdp_periodic_init)))
+ return error;
- cm->vlib_main = vm;
- cm->vnet_main = vnet_get_main();
- cm->neighbor_by_sw_if_index = hash_create (0, sizeof (uword));
+ cm->vlib_main = vm;
+ cm->vnet_main = vnet_get_main ();
+ cm->neighbor_by_sw_if_index = hash_create (0, sizeof (uword));
- return 0;
+ return 0;
}
VLIB_INIT_FUNCTION (cdp_init);
-static u8 * format_cdp_neighbors (u8 * s, va_list * va)
+static u8 *
+format_cdp_neighbors (u8 * s, va_list * va)
{
- CLIB_UNUSED(vlib_main_t *vm) = va_arg (*va, vlib_main_t *);
- cdp_main_t *cm = va_arg (*va, cdp_main_t *);
- vnet_main_t * vnm = & vnet_main;
- cdp_neighbor_t *n;
- vnet_hw_interface_t *hw;
-
- s = format (s,
- "%=25s %=15s %=25s %=10s\n",
- "Our Port", "Peer System", "Peer Port", "Last Heard");
-
- pool_foreach (n, cm->neighbors,
- ({
- hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index);
-
- if (n->disabled == 0)
- s = format (s, "%=25s %=15s %=25s %=10.1f\n",
- hw->name, n->device_name, n->port_id,
- n->last_heard);
- }));
- return s;
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ cdp_main_t *cm = va_arg (*va, cdp_main_t *);
+ vnet_main_t *vnm = &vnet_main;
+ cdp_neighbor_t *n;
+ vnet_hw_interface_t *hw;
+
+ s = format (s,
+ "%=25s %=15s %=25s %=10s\n",
+ "Our Port", "Peer System", "Peer Port", "Last Heard");
+
+ /* *INDENT-OFF* */
+ pool_foreach (n, cm->neighbors,
+ ({
+ hw = vnet_get_sup_hw_interface (vnm, n->sw_if_index);
+
+ if (n->disabled == 0)
+ s = format (s, "%=25s %=15s %=25s %=10.1f\n",
+ hw->name, n->device_name, n->port_id,
+ n->last_heard);
+ }));
+ /* *INDENT-ON* */
+ return s;
}
static clib_error_t *
show_cdp (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
+ unformat_input_t * input, vlib_cli_command_t * cmd)
{
- cdp_main_t *cm = &cdp_main;
-
- vlib_cli_output (vm, "%U\n", format_cdp_neighbors, vm, cm);
+ cdp_main_t *cm = &cdp_main;
- return 0;
+ vlib_cli_output (vm, "%U\n", format_cdp_neighbors, vm, cm);
+
+ return 0;
}
+/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_cdp_command, static) = {
- .path = "show cdp",
- .short_help = "Show cdp command",
- .function = show_cdp,
+ .path = "show cdp",
+ .short_help = "Show cdp command",
+ .function = show_cdp,
};
+/* *INDENT-ON* */
/*
* cdp_packet_scan except that we call the per TLV format
* functions instead of the per TLV processing functions
*/
-u8 * cdp_input_format_trace (u8 * s, va_list * args)
+u8 *
+cdp_input_format_trace (u8 * s, va_list * args)
{
- CLIB_UNUSED(vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- cdp_input_trace_t * t = va_arg (*args, cdp_input_trace_t *);
- u8 *cur;
- cdp_hdr_t *h;
- cdp_tlv_t *tlv;
- tlv_handler_t *handler;
- u8 * (*fp)(cdp_tlv_t *);
-
- cur = t->data;
-
- h = (cdp_hdr_t *)cur;
- s = format (s, "%U", format_cdp_hdr, h);
-
- cur = (u8 *)(h+1);
-
- while (cur < t->data + t->len) {
- tlv = (cdp_tlv_t *)cur;
- tlv->t = ntohs(tlv->t);
- tlv->l = ntohs(tlv->l);
- if (tlv->t >= ARRAY_LEN(tlv_handlers)) {
- s = format (s, "BAD_TLV\n");
- break;
- }
- handler = &tlv_handlers[tlv->t];
- fp = handler->format;
- s = format (s, " %U", fp, tlv);
- /* tlv length includes (t, l) */
- cur += tlv->l;
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ cdp_input_trace_t *t = va_arg (*args, cdp_input_trace_t *);
+ u8 *cur;
+ cdp_hdr_t *h;
+ cdp_tlv_t *tlv;
+ tlv_handler_t *handler;
+ u8 *(*fp) (cdp_tlv_t *);
+
+ cur = t->data;
+
+ h = (cdp_hdr_t *) cur;
+ s = format (s, "%U", format_cdp_hdr, h);
+
+ cur = (u8 *) (h + 1);
+
+ while (cur < t->data + t->len)
+ {
+ tlv = (cdp_tlv_t *) cur;
+ tlv->t = ntohs (tlv->t);
+ tlv->l = ntohs (tlv->l);
+ if (tlv->t >= ARRAY_LEN (tlv_handlers))
+ {
+ s = format (s, "BAD_TLV\n");
+ break;
+ }
+ handler = &tlv_handlers[tlv->t];
+ fp = handler->format;
+ s = format (s, " %U", fp, tlv);
+ /* tlv length includes (t, l) */
+ cur += tlv->l;
}
- return s;
+ return s;
}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff