diff options
| author | Ondrej Zajicek (work) <santiago@crfreenet.org> | 2022-01-09 02:40:58 +0100 |
|---|---|---|
| committer | Ondrej Zajicek (work) <santiago@crfreenet.org> | 2022-01-09 02:44:32 +0100 |
| commit | 60e9def9ef7b5d16f868b0fb4ab1192d59fd7541 (patch) | |
| tree | 101cc5b854d27a4ed72960712f5c9b0b0f38028f /proto | |
| parent | 87a02489f3880689a4e2ad72b0b981649dad2154 (diff) | |
BGP: Add option 'free bind'
The BGP 'free bind' option applies the IP_FREEBIND/IPV6_FREEBIND
socket option for the BGP listening socket.
Thanks to Alexander Zubkov for the idea.
Diffstat (limited to 'proto')
| -rw-r--r-- | proto/bgp/bgp.c | 11 | ||||
| -rw-r--r-- | proto/bgp/bgp.h | 1 | ||||
| -rw-r--r-- | proto/bgp/config.Y | 3 |
3 files changed, 11 insertions, 4 deletions
diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c index e4d754b1..b6f21bc6 100644 --- a/proto/bgp/bgp.c +++ b/proto/bgp/bgp.c @@ -157,6 +157,8 @@ bgp_open(struct bgp_proto *p) ip_addr addr = p->cf->strict_bind ? p->cf->local_ip : (p->ipv4 ? IPA_NONE4 : IPA_NONE6); uint port = p->cf->local_port; + uint flags = p->cf->free_bind ? SKF_FREEBIND : 0; + uint flag_mask = SKF_FREEBIND; /* FIXME: Add some global init? */ if (!bgp_linpool) @@ -165,8 +167,11 @@ bgp_open(struct bgp_proto *p) /* We assume that cf->iface is defined iff cf->local_ip is link-local */ WALK_LIST(bs, bgp_sockets) - if (ipa_equal(bs->sk->saddr, addr) && (bs->sk->sport == port) && - (bs->sk->iface == ifa) && (bs->sk->vrf == p->p.vrf)) + if (ipa_equal(bs->sk->saddr, addr) && + (bs->sk->sport == port) && + (bs->sk->iface == ifa) && + (bs->sk->vrf == p->p.vrf) && + ((bs->sk->flags & flag_mask) == flags)) { bs->uc++; p->sock = bs; @@ -180,7 +185,7 @@ bgp_open(struct bgp_proto *p) sk->sport = port; sk->iface = ifa; sk->vrf = p->p.vrf; - sk->flags = 0; + sk->flags = flags; sk->tos = IP_PREC_INTERNET_CONTROL; sk->rbsize = BGP_RX_BUFFER_SIZE; sk->tbsize = BGP_TX_BUFFER_SIZE; diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h index cca4b448..5e025ccd 100644 --- a/proto/bgp/bgp.h +++ b/proto/bgp/bgp.h @@ -86,6 +86,7 @@ struct bgp_config { int peer_type; /* Internal or external BGP (BGP_PT_*, optional) */ int multihop; /* Number of hops if multihop */ int strict_bind; /* Bind listening socket to local address */ + int free_bind; /* Bind listening socket with SKF_FREEBIND */ int ttl_security; /* Enable TTL security [RFC 5082] */ int compare_path_lengths; /* Use path lengths when selecting best route */ int med_metric; /* Compare MULTI_EXIT_DISC even between routes from differen ASes */ diff --git a/proto/bgp/config.Y b/proto/bgp/config.Y index 2dfbdca9..7cbc9985 100644 --- a/proto/bgp/config.Y +++ b/proto/bgp/config.Y @@ -31,7 +31,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE, STRICT, BIND, CONFEDERATION, MEMBER, MULTICAST, FLOW4, FLOW6, LONG, LIVED, STALE, IMPORT, IBGP, EBGP, MANDATORY, INTERNAL, EXTERNAL, SETS, DYNAMIC, RANGE, NAME, DIGITS, BGP_AIGP, AIGP, ORIGINATE, COST, ENFORCE, - FIRST) + FIRST, FREE) %type <i> bgp_nh %type <i32> bgp_afi @@ -155,6 +155,7 @@ bgp_proto: } | bgp_proto DYNAMIC NAME DIGITS expr ';' { BGP_CFG->dynamic_name_digits = $5; if ($5>10) cf_error("Dynamic name digits must be at most 10"); } | bgp_proto STRICT BIND bool ';' { BGP_CFG->strict_bind = $4; } + | bgp_proto FREE BIND bool ';' { BGP_CFG->free_bind = $4; } | bgp_proto PATH METRIC bool ';' { BGP_CFG->compare_path_lengths = $4; } | bgp_proto MED METRIC bool ';' { BGP_CFG->med_metric = $4; } | bgp_proto IGP METRIC bool ';' { BGP_CFG->igp_metric = $4; } |