Merge pull request #11903 from sri-mohan1/sri-bfd-dbg1

[mirror_frr.git] / bgpd / bgp_ecommunity.c

diff --git a/bgpd/bgp_ecommunity.c b/bgpd/bgp_ecommunity.c
index bd3383b753e7623eb5153dedbd6802b2b59774fa..3f627521e7d74dd4804d9bc1fb3bad231b9d1f45 100644 (file)
--- a/bgpd/bgp_ecommunity.c
+++ b/bgpd/bgp_ecommunity.c
@@ -63,7 +63,7 @@ void ecommunity_strfree(char **s)
        XFREE(MTYPE_ECOMMUNITY_STR, *s);
 }
 
-/* Allocate ecommunities.  */
+/* Free ecommunities.  */
 void ecommunity_free(struct ecommunity **ecom)
 {
        if (!(*ecom))
@@ -201,6 +201,7 @@ ecommunity_uniq_sort_internal(struct ecommunity *ecom,
 
        new = ecommunity_new();
        new->unit_size = ecom_size;
+       new->disable_ieee_floating = ecom->disable_ieee_floating;
 
        for (i = 0; i < ecom->size; i++) {
                eval = (void *)(ecom->val + (i * ecom_size));
@@ -209,7 +210,7 @@ ecommunity_uniq_sort_internal(struct ecommunity *ecom,
        return new;
 }
 
-/* This function takes pointer to Extended Communites strucutre then
+/* This function takes pointer to Extended Communites structure then
  * create a new Extended Communities structure by uniq and sort each
  * Extended Communities value.
  */
@@ -220,8 +221,9 @@ struct ecommunity *ecommunity_uniq_sort(struct ecommunity *ecom)
 
 /* Parse Extended Communites Attribute in BGP packet.  */
 static struct ecommunity *ecommunity_parse_internal(uint8_t *pnt,
-                                       unsigned short length,
-                                       unsigned short size_ecom)
+                                                   unsigned short length,
+                                                   unsigned short size_ecom,
+                                                   bool disable_ieee_floating)
 {
        struct ecommunity tmp;
        struct ecommunity *new;
@@ -234,6 +236,7 @@ static struct ecommunity *ecommunity_parse_internal(uint8_t *pnt,
           Attribute.  */
        tmp.size = length / size_ecom;
        tmp.val = pnt;
+       tmp.disable_ieee_floating = disable_ieee_floating;
 
        /* Create a new Extended Communities Attribute by uniq and sort each
           Extended Communities value  */
@@ -242,17 +245,18 @@ static struct ecommunity *ecommunity_parse_internal(uint8_t *pnt,
        return ecommunity_intern(new);
 }
 
-struct ecommunity *ecommunity_parse(uint8_t *pnt,
-                                   unsigned short length)
+struct ecommunity *ecommunity_parse(uint8_t *pnt, unsigned short length,
+                                   bool disable_ieee_floating)
 {
-       return ecommunity_parse_internal(pnt, length, ECOMMUNITY_SIZE);
+       return ecommunity_parse_internal(pnt, length, ECOMMUNITY_SIZE,
+                                        disable_ieee_floating);
 }
 
-struct ecommunity *ecommunity_parse_ipv6(uint8_t *pnt,
-                                        unsigned short length)
+struct ecommunity *ecommunity_parse_ipv6(uint8_t *pnt, unsigned short length,
+                                        bool disable_ieee_floating)
 {
-       return ecommunity_parse_internal(pnt, length,
-                                        IPV6_ECOMMUNITY_SIZE);
+       return ecommunity_parse_internal(pnt, length, IPV6_ECOMMUNITY_SIZE,
+                                        disable_ieee_floating);
 }
 
 /* Duplicate the Extended Communities Attribute structure.  */
@@ -836,11 +840,23 @@ static int ecommunity_rt_soo_str(char *buf, size_t bufsz, const uint8_t *pnt,
                                              ECOMMUNITY_SIZE);
 }
 
-static int ecommunity_lb_str(char *buf, size_t bufsz, const uint8_t *pnt)
+/* Helper function to convert IEEE-754 Floating Point to uint32 */
+static uint32_t ieee_float_uint32_to_uint32(uint32_t u)
+{
+       union {
+               float r;
+               uint32_t d;
+       } f = {.d = u};
+
+       return (uint32_t)f.r;
+}
+
+static int ecommunity_lb_str(char *buf, size_t bufsz, const uint8_t *pnt,
+                            bool disable_ieee_floating)
 {
        int len = 0;
        as_t as;
-       uint32_t bw;
+       uint32_t bw_tmp, bw;
        char bps_buf[20] = {0};
 
 #define ONE_GBPS_BYTES (1000 * 1000 * 1000 / 8)
@@ -849,7 +865,11 @@ static int ecommunity_lb_str(char *buf, size_t bufsz, const uint8_t *pnt)
 
        as = (*pnt++ << 8);
        as |= (*pnt++);
-       (void)ptr_get_be32(pnt, &bw);
+       (void)ptr_get_be32(pnt, &bw_tmp);
+
+       bw = disable_ieee_floating ? bw_tmp
+                                  : ieee_float_uint32_to_uint32(bw_tmp);
+
        if (bw >= ONE_GBPS_BYTES)
                snprintf(bps_buf, sizeof(bps_buf), "%.3f Gbps",
                         (float)(bw / ONE_GBPS_BYTES));
@@ -914,7 +934,7 @@ char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
                        strlcat(str_buf, " ", str_size);
 
                /* Retrieve value field */
-               pnt = ecom->val + (i * 8);
+               pnt = ecom->val + (i * ecom->unit_size);
 
                /* High-order octet is the type */
                type = *pnt++;
@@ -940,8 +960,9 @@ char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
                                } else if (sub_type ==
                                           ECOMMUNITY_LINK_BANDWIDTH &&
                                           type == ECOMMUNITY_ENCODE_AS) {
-                                       ecommunity_lb_str(encbuf,
-                                               sizeof(encbuf), pnt);
+                                       ecommunity_lb_str(
+                                               encbuf, sizeof(encbuf), pnt,
+                                               ecom->disable_ieee_floating);
                                } else
                                        unk_ecom = 1;
                        } else {
@@ -1147,7 +1168,8 @@ char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
                } else if (type == ECOMMUNITY_ENCODE_AS_NON_TRANS) {
                        sub_type = *pnt++;
                        if (sub_type == ECOMMUNITY_LINK_BANDWIDTH)
-                               ecommunity_lb_str(encbuf, sizeof(encbuf), pnt);
+                               ecommunity_lb_str(encbuf, sizeof(encbuf), pnt,
+                                                 ecom->disable_ieee_floating);
                        else
                                unk_ecom = 1;
                } else {
@@ -1166,6 +1188,23 @@ char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
        return str_buf;
 }
 
+bool ecommunity_include(struct ecommunity *e1, struct ecommunity *e2)
+{
+       uint32_t i, j;
+
+       if (!e1 || !e2)
+               return false;
+       for (i = 0; i < e1->size; ++i) {
+               for (j = 0; j < e2->size; ++j) {
+                       if (!memcmp(e1->val + (i * e1->unit_size),
+                                   e2->val + (j * e2->unit_size),
+                                   e1->unit_size))
+                               return true;
+               }
+       }
+       return false;
+}
+
 bool ecommunity_match(const struct ecommunity *ecom1,
                      const struct ecommunity *ecom2)
 {
@@ -1533,7 +1572,10 @@ const uint8_t *ecommunity_linkbw_present(struct ecommunity *ecom, uint32_t *bw)
                        pnt = ptr_get_be32(pnt, &bwval);
                        (void)pnt; /* consume value */
                        if (bw)
-                               *bw = bwval;
+                               *bw = ecom->disable_ieee_floating
+                                             ? bwval
+                                             : ieee_float_uint32_to_uint32(
+                                                       bwval);
                        return eval;
                }
        }
@@ -1542,9 +1584,9 @@ const uint8_t *ecommunity_linkbw_present(struct ecommunity *ecom, uint32_t *bw)
 }
 
 
-struct ecommunity *ecommunity_replace_linkbw(as_t as,
-                                            struct ecommunity *ecom,
-                                            uint64_t cum_bw)
+struct ecommunity *ecommunity_replace_linkbw(as_t as, struct ecommunity *ecom,
+                                            uint64_t cum_bw,
+                                            bool disable_ieee_floating)
 {
        struct ecommunity *new;
        struct ecommunity_val lb_eval;
@@ -1574,8 +1616,8 @@ struct ecommunity *ecommunity_replace_linkbw(as_t as,
         */
        if (cum_bw > 0xFFFFFFFF)
                cum_bw = 0xFFFFFFFF;
-       encode_lb_extcomm(as > BGP_AS_MAX ? BGP_AS_TRANS : as, cum_bw,
-                         false, &lb_eval);
+       encode_lb_extcomm(as > BGP_AS_MAX ? BGP_AS_TRANS : as, cum_bw, false,
+                         &lb_eval, disable_ieee_floating);
        new = ecommunity_dup(ecom);
        ecommunity_add_val(new, &lb_eval, true, true);