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-rw-r--r--isisd/isis_misc.c528
1 files changed, 528 insertions, 0 deletions
diff --git a/isisd/isis_misc.c b/isisd/isis_misc.c
new file mode 100644
index 0000000..e4ef6c8
--- /dev/null
+++ b/isisd/isis_misc.c
@@ -0,0 +1,528 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * IS-IS Rout(e)ing protocol - isis_misc.h
+ * Miscellanous routines
+ *
+ * Copyright (C) 2001,2002 Sampo Saaristo
+ * Tampere University of Technology
+ * Institute of Communications Engineering
+ */
+
+#include <zebra.h>
+
+#include "printfrr.h"
+#include "stream.h"
+#include "vty.h"
+#include "hash.h"
+#include "if.h"
+#include "command.h"
+#include "network.h"
+
+#include "isisd/isis_constants.h"
+#include "isisd/isis_common.h"
+#include "isisd/isis_flags.h"
+#include "isisd/isis_circuit.h"
+#include "isisd/isis_csm.h"
+#include "isisd/isisd.h"
+#include "isisd/isis_misc.h"
+
+#include "isisd/isis_lsp.h"
+#include "isisd/isis_constants.h"
+#include "isisd/isis_adjacency.h"
+#include "isisd/isis_dynhn.h"
+
+/* staticly assigned vars for printing purposes */
+static char sys_hostname[ISO_SYSID_STRLEN];
+struct in_addr new_prefix;
+/* len of xxYxxMxWxdxxhxxmxxs + place for #0 termination */
+char datestring[20];
+char nlpidstring[30];
+
+/*
+ * Returns 0 on error, length of buff on ok
+ * extract dot from the dotted str, and insert all the number in a buff
+ */
+int dotformat2buff(uint8_t *buff, const char *dotted)
+{
+ int dotlen, len = 0;
+ const char *pos = dotted;
+ uint8_t number[3];
+ int nextdotpos = 2;
+
+ number[2] = '\0';
+ dotlen = strlen(dotted);
+ if (dotlen > 50) {
+ /* this can't be an iso net, its too long */
+ return 0;
+ }
+
+ while ((pos - dotted) < dotlen && len < 20) {
+ if (*pos == '.') {
+ /* we expect the . at 2, and than every 5 */
+ if ((pos - dotted) != nextdotpos) {
+ len = 0;
+ break;
+ }
+ nextdotpos += 5;
+ pos++;
+ continue;
+ }
+ /* we must have at least two chars left here */
+ if (dotlen - (pos - dotted) < 2) {
+ len = 0;
+ break;
+ }
+
+ if ((isxdigit((unsigned char)*pos)) &&
+ (isxdigit((unsigned char)*(pos + 1)))) {
+ memcpy(number, pos, 2);
+ pos += 2;
+ } else {
+ len = 0;
+ break;
+ }
+
+ *(buff + len) = (char)strtol((char *)number, NULL, 16);
+ len++;
+ }
+
+ return len;
+}
+
+/*
+ * conversion of XXXX.XXXX.XXXX to memory
+ */
+int sysid2buff(uint8_t *buff, const char *dotted)
+{
+ int len = 0;
+ const char *pos = dotted;
+ uint8_t number[3];
+
+ number[2] = '\0';
+ // surely not a sysid_string if not 14 length
+ if (strlen(dotted) != 14) {
+ return 0;
+ }
+
+ while (len < ISIS_SYS_ID_LEN) {
+ if (*pos == '.') {
+ /* the . is not positioned correctly */
+ if (((pos - dotted) != 4) && ((pos - dotted) != 9)) {
+ len = 0;
+ break;
+ }
+ pos++;
+ continue;
+ }
+ if ((isxdigit((unsigned char)*pos)) &&
+ (isxdigit((unsigned char)*(pos + 1)))) {
+ memcpy(number, pos, 2);
+ pos += 2;
+ } else {
+ len = 0;
+ break;
+ }
+
+ *(buff + len) = (char)strtol((char *)number, NULL, 16);
+ len++;
+ }
+
+ return len;
+}
+
+const char *nlpid2str(uint8_t nlpid)
+{
+ static char buf[4];
+ switch (nlpid) {
+ case NLPID_IP:
+ return "IPv4";
+ case NLPID_IPV6:
+ return "IPv6";
+ case NLPID_SNAP:
+ return "SNAP";
+ case NLPID_CLNP:
+ return "CLNP";
+ case NLPID_ESIS:
+ return "ES-IS";
+ default:
+ snprintf(buf, sizeof(buf), "%hhu", nlpid);
+ return buf;
+ }
+}
+
+/*
+ * converts the nlpids struct (filled by TLV #129)
+ * into a string
+ */
+
+char *nlpid2string(struct nlpids *nlpids)
+{
+ int i;
+ char tbuf[256];
+ nlpidstring[0] = '\0';
+
+ for (i = 0; i < nlpids->count; i++) {
+ snprintf(tbuf, sizeof(tbuf), "%s",
+ nlpid2str(nlpids->nlpids[i]));
+ strlcat(nlpidstring, tbuf, sizeof(nlpidstring));
+ if (nlpids->count - i > 1)
+ strlcat(nlpidstring, ", ", sizeof(nlpidstring));
+ }
+
+ return nlpidstring;
+}
+
+/*
+ * Returns 0 on error, IS-IS Circuit Type on ok
+ */
+int string2circuit_t(const char *str)
+{
+
+ if (!str)
+ return 0;
+
+ if (!strcmp(str, "level-1"))
+ return IS_LEVEL_1;
+
+ if (!strcmp(str, "level-2-only") || !strcmp(str, "level-2"))
+ return IS_LEVEL_2;
+
+ if (!strcmp(str, "level-1-2"))
+ return IS_LEVEL_1_AND_2;
+
+ return 0;
+}
+
+const char *circuit_state2string(int state)
+{
+
+ switch (state) {
+ case C_STATE_INIT:
+ return "Init";
+ case C_STATE_CONF:
+ return "Config";
+ case C_STATE_UP:
+ return "Up";
+ default:
+ return "Unknown";
+ }
+ return NULL;
+}
+
+const char *circuit_type2string(int type)
+{
+
+ switch (type) {
+ case CIRCUIT_T_P2P:
+ return "p2p";
+ case CIRCUIT_T_BROADCAST:
+ return "lan";
+ case CIRCUIT_T_LOOPBACK:
+ return "loopback";
+ default:
+ return "Unknown";
+ }
+ return NULL;
+}
+
+const char *circuit_t2string(int circuit_t)
+{
+ switch (circuit_t) {
+ case IS_LEVEL_1:
+ return "L1";
+ case IS_LEVEL_2:
+ return "L2";
+ case IS_LEVEL_1_AND_2:
+ return "L1L2";
+ default:
+ return "??";
+ }
+
+ return NULL; /* not reached */
+}
+
+const char *syst2string(int type)
+{
+ switch (type) {
+ case ISIS_SYSTYPE_ES:
+ return "ES";
+ case ISIS_SYSTYPE_IS:
+ return "IS";
+ case ISIS_SYSTYPE_L1_IS:
+ return "1";
+ case ISIS_SYSTYPE_L2_IS:
+ return "2";
+ default:
+ return "??";
+ }
+
+ return NULL; /* not reached */
+}
+
+const char *isis_hello_padding2string(int hello_padding_type)
+{
+ switch (hello_padding_type) {
+ case ISIS_HELLO_PADDING_DISABLED:
+ return "no";
+ case ISIS_HELLO_PADDING_DURING_ADJACENCY_FORMATION:
+ return "during-adjacency-formation";
+ case ISIS_HELLO_PADDING_ALWAYS:
+ return "yes";
+ }
+ return NULL; /* not reached */
+}
+
+const char *time2string(uint32_t time)
+{
+ uint32_t rest;
+ char tbuf[32];
+ datestring[0] = '\0';
+
+ if (time == 0)
+ return "-";
+
+ if (time / SECS_PER_YEAR) {
+ snprintf(tbuf, sizeof(tbuf), "%uY", time / SECS_PER_YEAR);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+ rest = time % SECS_PER_YEAR;
+ if (rest / SECS_PER_MONTH) {
+ snprintf(tbuf, sizeof(tbuf), "%uM", rest / SECS_PER_MONTH);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+ rest = rest % SECS_PER_MONTH;
+ if (rest / SECS_PER_WEEK) {
+ snprintf(tbuf, sizeof(tbuf), "%uw", rest / SECS_PER_WEEK);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+ rest = rest % SECS_PER_WEEK;
+ if (rest / SECS_PER_DAY) {
+ snprintf(tbuf, sizeof(tbuf), "%ud", rest / SECS_PER_DAY);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+ rest = rest % SECS_PER_DAY;
+ if (rest / SECS_PER_HOUR) {
+ snprintf(tbuf, sizeof(tbuf), "%uh", rest / SECS_PER_HOUR);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+ rest = rest % SECS_PER_HOUR;
+ if (rest / SECS_PER_MINUTE) {
+ snprintf(tbuf, sizeof(tbuf), "%um", rest / SECS_PER_MINUTE);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+ rest = rest % SECS_PER_MINUTE;
+ if (rest) {
+ snprintf(tbuf, sizeof(tbuf), "%us", rest);
+ strlcat(datestring, tbuf, sizeof(datestring));
+ }
+
+ return datestring;
+}
+
+/*
+ * routine to decrement a timer by a random
+ * number
+ *
+ * first argument is the timer and the second is
+ * the jitter
+ */
+unsigned long isis_jitter(unsigned long timer, unsigned long jitter)
+{
+ int j, k;
+
+ if (jitter >= 100)
+ return timer;
+
+ if (timer == 1)
+ return timer;
+ /*
+ * randomizing just the percent value provides
+ * no good random numbers - hence the spread
+ * to RANDOM_SPREAD (100000), which is ok as
+ * most IS-IS timers are no longer than 16 bit
+ */
+
+ j = 1 + (int)((RANDOM_SPREAD * frr_weak_random()) / (RAND_MAX + 1.0));
+
+ k = timer - (timer * (100 - jitter)) / 100;
+
+ timer = timer - (k * j / RANDOM_SPREAD);
+
+ return timer;
+}
+
+struct in_addr newprefix2inaddr(uint8_t *prefix_start, uint8_t prefix_masklen)
+{
+ memset(&new_prefix, 0, sizeof(new_prefix));
+ memcpy(&new_prefix, prefix_start,
+ (prefix_masklen & 0x3F)
+ ? ((((prefix_masklen & 0x3F) - 1) >> 3) + 1)
+ : 0);
+ return new_prefix;
+}
+
+/*
+ * Returns the dynamic hostname associated with the passed system ID.
+ * If no dynamic hostname found then returns formatted system ID.
+ */
+const char *print_sys_hostname(const uint8_t *sysid)
+{
+ struct isis_dynhn *dyn;
+ struct isis *isis = NULL;
+ struct listnode *node;
+
+ if (!sysid)
+ return "nullsysid";
+
+ /* For our system ID return our host name */
+ isis = isis_lookup_by_sysid(sysid);
+ if (isis && !CHECK_FLAG(im->options, F_ISIS_UNIT_TEST))
+ return cmd_hostname_get();
+
+ for (ALL_LIST_ELEMENTS_RO(im->isis, node, isis)) {
+ dyn = dynhn_find_by_id(isis, sysid);
+ if (dyn)
+ return dyn->hostname;
+ }
+
+ snprintfrr(sys_hostname, ISO_SYSID_STRLEN, "%pSY", sysid);
+ return sys_hostname;
+}
+
+/*
+ * This function is a generic utility that logs data of given length.
+ * Move this to a shared lib so that any protocol can use it.
+ */
+void zlog_dump_data(void *data, int len)
+{
+ int i;
+ unsigned char *p;
+ unsigned char c;
+ char bytestr[4];
+ char addrstr[10];
+ char hexstr[16 * 3 + 5];
+ char charstr[16 * 1 + 5];
+
+ p = data;
+ memset(bytestr, 0, sizeof(bytestr));
+ memset(addrstr, 0, sizeof(addrstr));
+ memset(hexstr, 0, sizeof(hexstr));
+ memset(charstr, 0, sizeof(charstr));
+
+ for (i = 1; i <= len; i++) {
+ c = *p;
+ if (isalnum(c) == 0)
+ c = '.';
+
+ /* store address for this line */
+ if ((i % 16) == 1)
+ snprintf(addrstr, sizeof(addrstr), "%p", p);
+
+ /* store hex str (for left side) */
+ snprintf(bytestr, sizeof(bytestr), "%02X ", *p);
+ strlcat(hexstr, bytestr, sizeof(hexstr) - strlen(hexstr) - 1);
+
+ /* store char str (for right side) */
+ snprintf(bytestr, sizeof(bytestr), "%c", c);
+ strlcat(charstr, bytestr,
+ sizeof(charstr) - strlen(charstr) - 1);
+
+ if ((i % 16) == 0) {
+ /* line completed */
+ zlog_debug("[%8.8s] %-50.50s %s", addrstr, hexstr,
+ charstr);
+ hexstr[0] = 0;
+ charstr[0] = 0;
+ } else if ((i % 8) == 0) {
+ /* half line: add whitespaces */
+ strlcat(hexstr, " ",
+ sizeof(hexstr) - strlen(hexstr) - 1);
+ strlcat(charstr, " ",
+ sizeof(charstr) - strlen(charstr) - 1);
+ }
+ p++; /* next byte */
+ }
+
+ /* print rest of buffer if not empty */
+ if (strlen(hexstr) > 0)
+ zlog_debug("[%8.8s] %-50.50s %s", addrstr, hexstr, charstr);
+ return;
+}
+
+void log_multiline(int priority, const char *prefix, const char *format, ...)
+{
+ char shortbuf[256];
+ va_list ap;
+ char *p;
+
+ va_start(ap, format);
+ p = vasnprintfrr(MTYPE_TMP, shortbuf, sizeof(shortbuf), format, ap);
+ va_end(ap);
+
+ if (!p)
+ return;
+
+ char *saveptr = NULL;
+ for (char *line = strtok_r(p, "\n", &saveptr); line;
+ line = strtok_r(NULL, "\n", &saveptr)) {
+ zlog(priority, "%s%s", prefix, line);
+ }
+
+ if (p != shortbuf)
+ XFREE(MTYPE_TMP, p);
+}
+
+char *log_uptime(time_t uptime, char *buf, size_t nbuf)
+{
+ struct tm tm;
+ time_t difftime = time(NULL);
+ difftime -= uptime;
+ gmtime_r(&difftime, &tm);
+
+ if (difftime < ONE_DAY_SECOND)
+ snprintf(buf, nbuf, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
+ tm.tm_sec);
+ else if (difftime < ONE_WEEK_SECOND)
+ snprintf(buf, nbuf, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
+ tm.tm_min);
+ else
+ snprintf(buf, nbuf, "%02dw%dd%02dh", tm.tm_yday / 7,
+ tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
+
+ return buf;
+}
+
+void vty_multiline(struct vty *vty, const char *prefix, const char *format, ...)
+{
+ char shortbuf[256];
+ va_list ap;
+ char *p;
+
+ va_start(ap, format);
+ p = vasnprintfrr(MTYPE_TMP, shortbuf, sizeof(shortbuf), format, ap);
+ va_end(ap);
+
+ if (!p)
+ return;
+
+ char *saveptr = NULL;
+ for (char *line = strtok_r(p, "\n", &saveptr); line;
+ line = strtok_r(NULL, "\n", &saveptr)) {
+ vty_out(vty, "%s%s\n", prefix, line);
+ }
+
+ if (p != shortbuf)
+ XFREE(MTYPE_TMP, p);
+}
+
+void vty_out_timestr(struct vty *vty, time_t uptime)
+{
+ time_t difftime = time(NULL);
+ char buf[MONOTIME_STRLEN];
+
+ difftime -= uptime;
+
+ frrtime_to_interval(difftime, buf, sizeof(buf));
+
+ vty_out(vty, "%s ago", buf);
+}
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