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isisd: Add CLI command to show SRv6 node info

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Add a CLI command to print SRv6 capabilities, algorithms and MSDs
supported by the IS-IS nodes.

Example:

r1# show isis segment-routing srv6 node
Area FOO:
 IS-IS L1 SRv6-Nodes:

 IS-IS L2 SRv6-Nodes:

 System ID       Algorithm  SRH Max SL  SRH Max End Pop  SRH Max H.encaps  SRH Max End D
 -----------------------------------------------------------------------------------------
 1111.1111.1111  SPF        16          0                1                 2
 2222.2222.2222  SPF        16          0                1                 2

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-02-02 11:29:09 +01:00
parent 00a05b79b6
commit fb9eb231f4
1 changed files with 86 additions and 0 deletions
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86
isisd/isis_srv6.c
View File

@ -9,9 +9,94 @@
#include <zebra.h>
#include "termtable.h"
#include "isisd/isisd.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_srv6.h"
/**
* Show Segment Routing over IPv6 (SRv6) Node.
*
* @param vty VTY output
* @param area IS-IS area
* @param level IS-IS level
*/
static void show_node(struct vty *vty, struct isis_area *area, int level)
{
struct isis_lsp *lsp;
struct ttable *tt;
vty_out(vty, " IS-IS %s SRv6-Nodes:\n\n", circuit_t2string(level));
/* Prepare table. */
tt = ttable_new(&ttable_styles[TTSTYLE_BLANK]);
ttable_add_row(
tt,
"System ID|Algorithm|SRH Max SL|SRH Max End Pop|SRH Max H.encaps|SRH Max End D");
tt->style.cell.rpad = 2;
tt->style.corner = '+';
ttable_restyle(tt);
ttable_rowseps(tt, 0, BOTTOM, true, '-');
frr_each (lspdb, &area->lspdb[level - 1], lsp) {
struct isis_router_cap *cap;
if (!lsp->tlvs)
continue;
cap = lsp->tlvs->router_cap;
if (!cap)
continue;
ttable_add_row(tt, "%pSY|%s|%u|%u|%u|%u", lsp->hdr.lsp_id,
cap->algo[0] == SR_ALGORITHM_SPF ? "SPF"
: "S-SPF",
cap->srv6_msd.max_seg_left_msd,
cap->srv6_msd.max_end_pop_msd,
cap->srv6_msd.max_h_encaps_msd,
cap->srv6_msd.max_end_d_msd);
}
/* Dump the generated table. */
if (tt->nrows > 1) {
char *table;
table = ttable_dump(tt, "\n");
vty_out(vty, "%s\n", table);
XFREE(MTYPE_TMP, table);
}
ttable_del(tt);
}
DEFUN(show_srv6_node, show_srv6_node_cmd,
"show " PROTO_NAME " segment-routing srv6 node",
SHOW_STR
PROTO_HELP
"Segment-Routing\n"
"Segment-Routing over IPv6 (SRv6)\n"
"SRv6 node\n")
{
struct listnode *node, *inode;
struct isis_area *area;
struct isis *isis;
for (ALL_LIST_ELEMENTS_RO(im->isis, inode, isis)) {
for (ALL_LIST_ELEMENTS_RO(isis->area_list, node, area)) {
vty_out(vty, "Area %s:\n",
area->area_tag ? area->area_tag : "null");
if (!area->srv6db.config.enabled) {
vty_out(vty, " SRv6 is disabled\n");
continue;
}
for (int level = ISIS_LEVEL1; level <= ISIS_LEVELS;
level++)
show_node(vty, area, level);
}
}
return CMD_SUCCESS;
}
/**
* IS-IS SRv6 initialization for given area.
*
@ -56,6 +141,7 @@ void isis_srv6_area_term(struct isis_area *area)
*/
void isis_srv6_init(void)
{
install_element(VIEW_NODE, &show_srv6_node_cmd);
}
/**