diff options
Diffstat (limited to 'lib/nexthop.h')
| -rw-r--r-- | lib/nexthop.h | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/lib/nexthop.h b/lib/nexthop.h index eda88efc08..ed40cc7eed 100644 --- a/lib/nexthop.h +++ b/lib/nexthop.h @@ -65,6 +65,12 @@ enum nh_encap_type { NET_VXLAN = 100, /* value copied from FPM_NH_ENCAP_VXLAN. */ }; +/* Fixed limit on the number of backup nexthops per primary nexthop */ +#define NEXTHOP_MAX_BACKUPS 8 + +/* Backup index value is limited */ +#define NEXTHOP_BACKUP_IDX_MAX 255 + /* Nexthop structure. */ struct nexthop { struct nexthop *next; @@ -124,10 +130,11 @@ struct nexthop { /* Weight of the nexthop ( for unequal cost ECMP ) */ uint8_t weight; - /* Index of a corresponding backup nexthop in a backup list; + /* Count and index of corresponding backup nexthop(s) in a backup list; * only meaningful if the HAS_BACKUP flag is set. */ - uint8_t backup_idx; + uint8_t backup_num; + uint8_t backup_idx[NEXTHOP_MAX_BACKUPS]; /* Encapsulation information. */ enum nh_encap_type nh_encap_type; @@ -136,9 +143,6 @@ struct nexthop { } nh_encap; }; -/* Backup index value is limited */ -#define NEXTHOP_BACKUP_IDX_MAX 255 - /* Utility to append one nexthop to another. */ #define NEXTHOP_APPEND(to, new) \ do { \ @@ -216,7 +220,7 @@ extern const char *nexthop2str(const struct nexthop *nexthop, extern struct nexthop *nexthop_next(const struct nexthop *nexthop); extern struct nexthop * nexthop_next_active_resolved(const struct nexthop *nexthop); -extern unsigned int nexthop_level(struct nexthop *nexthop); +extern unsigned int nexthop_level(const struct nexthop *nexthop); /* Copies to an already allocated nexthop struct */ extern void nexthop_copy(struct nexthop *copy, const struct nexthop *nexthop, struct nexthop *rparent); @@ -231,6 +235,15 @@ extern struct nexthop *nexthop_dup(const struct nexthop *nexthop, extern struct nexthop *nexthop_dup_no_recurse(const struct nexthop *nexthop, struct nexthop *rparent); +/* + * Parse one or more backup index values, as comma-separated numbers, + * into caller's array of uint8_ts. The array must be NEXTHOP_MAX_BACKUPS + * in size. Mails back the number of values converted, and returns 0 on + * success, <0 if an error in parsing. + */ +int nexthop_str2backups(const char *str, int *num_backups, + uint8_t *backups); + #ifdef _FRR_ATTRIBUTE_PRINTFRR #pragma FRR printfrr_ext "%pNH" (struct nexthop *) #endif |