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RIP: Demand circuit support (RFC 2091)
This commit is contained in:
Ondrej Zajicek (work)
parent
3343088a71
commit
22c3cf955d
@ -84,6 +84,8 @@ void fit_init(struct fib_iterator *, struct fib *); /* Internal functions, don't
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struct fib_node *fit_get(struct fib *, struct fib_iterator *);
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void fit_put(struct fib_iterator *, struct fib_node *);
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void fit_put_next(struct fib *f, struct fib_iterator *i, struct fib_node *n, uint hpos);
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void fit_put_end(struct fib_iterator *i);
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void fit_copy(struct fib *f, struct fib_iterator *dst, struct fib_iterator *src);
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#define FIB_WALK(fib, type, z) do { \
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@ -118,8 +120,12 @@ void fit_put_next(struct fib *f, struct fib_iterator *i, struct fib_node *n, uin
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#define FIB_ITERATE_PUT_NEXT(it, fib) fit_put_next(fib, it, fn_, hpos_)
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#define FIB_ITERATE_PUT_END(it) fit_put_end(it)
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#define FIB_ITERATE_UNLINK(it, fib) fit_get(fib, it)
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#define FIB_ITERATE_COPY(dst, src, fib) fit_copy(fib, dst, src)
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/*
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* Master Routing Tables. Generally speaking, each of them contains a FIB
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@ -584,6 +584,40 @@ found:
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fit_put(i, n);
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}
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void
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fit_put_end(struct fib_iterator *i)
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{
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i->prev = i->next = NULL;
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i->node = NULL;
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i->hash = ~0 - 1;
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}
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void
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fit_copy(struct fib *f, struct fib_iterator *dst, struct fib_iterator *src)
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{
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struct fib_iterator *nxt = src->next;
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fit_get(f, dst);
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if (!src->prev)
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{
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/* We are at the end */
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fit_put_end(dst);
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return;
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}
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src->next = dst;
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dst->prev = src;
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dst->next = nxt;
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if (nxt)
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nxt->prev = dst;
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dst->node = src->node;
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dst->hash = src->hash;
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}
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#ifdef DEBUGGING
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/**
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@ -36,7 +36,8 @@ CF_KEYWORDS(RIP, NG, ECMP, LIMIT, WEIGHT, INFINITY, METRIC, UPDATE, TIMEOUT,
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GARBAGE, PORT, ADDRESS, MODE, BROADCAST, MULTICAST, PASSIVE,
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VERSION, SPLIT, HORIZON, POISON, REVERSE, CHECK, ZERO, TIME, BFD,
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AUTHENTICATION, NONE, PLAINTEXT, CRYPTOGRAPHIC, MD5, TTL, SECURITY,
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RX, TX, BUFFER, LENGTH, PRIORITY, ONLY, LINK, RIP_METRIC, RIP_TAG)
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RX, TX, BUFFER, LENGTH, PRIORITY, ONLY, LINK, DEMAND, CIRCUIT,
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RIP_METRIC, RIP_TAG)
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%type <i> rip_variant rip_auth
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@ -102,6 +103,7 @@ rip_iface_start:
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RIP_IFACE->update_time = RIP_DEFAULT_UPDATE_TIME;
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RIP_IFACE->timeout_time = RIP_DEFAULT_TIMEOUT_TIME;
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RIP_IFACE->garbage_time = RIP_DEFAULT_GARBAGE_TIME;
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RIP_IFACE->rxmt_time = RIP_DEFAULT_RXMT_TIME;
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};
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rip_iface_finish:
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@ -149,9 +151,11 @@ rip_iface_item:
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| SPLIT HORIZON bool { RIP_IFACE->split_horizon = $3; }
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| POISON REVERSE bool { RIP_IFACE->poison_reverse = $3; }
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| CHECK ZERO bool { RIP_IFACE->check_zero = $3; }
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| DEMAND CIRCUIT bool { RIP_IFACE->demand_circuit = $3; }
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| UPDATE TIME expr { RIP_IFACE->update_time = $3 S_; if ($3<=0) cf_error("Update time must be positive"); }
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| TIMEOUT TIME expr { RIP_IFACE->timeout_time = $3 S_; if ($3<=0) cf_error("Timeout time must be positive"); }
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| GARBAGE TIME expr { RIP_IFACE->garbage_time = $3 S_; if ($3<=0) cf_error("Garbage time must be positive"); }
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| RETRANSMIT TIME expr_us { RIP_IFACE->rxmt_time = $3; if ($3<=0) cf_error("Retransmit time must be positive"); }
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| ECMP WEIGHT expr { RIP_IFACE->ecmp_weight = $3 - 1; if (($3<1) || ($3>256)) cf_error("ECMP weight must be in range 1-256"); }
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| RX BUFFER expr { RIP_IFACE->rx_buffer = $3; if (($3<256) || ($3>65535)) cf_error("RX length must be in range 256-65535"); }
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| TX LENGTH expr { RIP_IFACE->tx_length = $3; if (($3<256) || ($3>65535)) cf_error("TX length must be in range 256-65535"); }
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@ -18,12 +18,18 @@
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#define RIP_CMD_REQUEST 1 /* want info */
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#define RIP_CMD_RESPONSE 2 /* responding to request */
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#define RIP_CMD_UPDATE_REQUEST 9
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#define RIP_CMD_UPDATE_RESPONSE 10
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#define RIP_CMD_UPDATE_ACK 11
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#define RIP_BLOCK_LENGTH 20
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#define RIP_PASSWD_LENGTH 16
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#define RIP_AF_IPV4 2
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#define RIP_AF_AUTH 0xffff
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#define RIP_UPDATE_VERSION 1
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/* RIP packet header */
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struct rip_packet
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@ -33,6 +39,14 @@ struct rip_packet
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u16 unused;
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};
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/* Triggered RIP update header (RFC 2091) */
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struct rip_update_hdr
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{
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u8 version;
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u8 flush;
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u16 seqnum;
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};
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/* RTE block for RIPv2 */
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struct rip_block_v2
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{
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@ -89,6 +103,8 @@ struct rip_block
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ip_addr next_hop;
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};
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static int
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rip_send_ack(struct rip_proto *p, struct rip_iface *ifa, uint flush, uint seqnum);
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#define DROP(DSC,VAL) do { err_dsc = DSC; err_val = VAL; goto drop; } while(0)
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#define DROP1(DSC) do { err_dsc = DSC; goto drop; } while(0)
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@ -107,8 +123,27 @@ struct rip_block
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static inline void * rip_tx_buffer(struct rip_iface *ifa)
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{ return ifa->sk->tbuf; }
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static inline uint rip_pkt_hdrlen(struct rip_iface *ifa)
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{ return sizeof(struct rip_packet) + (ifa->cf->auth_type ? RIP_BLOCK_LENGTH : 0); }
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static inline uint
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rip_pkt_hdrlen(struct rip_iface *ifa)
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{
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return sizeof(struct rip_packet) +
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(ifa->cf->demand_circuit ? sizeof(struct rip_update_hdr) : 0) +
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(ifa->cf->auth_type ? RIP_BLOCK_LENGTH : 0);
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}
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static inline struct rip_update_hdr *
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rip_get_update_hdr(struct rip_packet *pkt)
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{
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return (void *) ((byte *) pkt + sizeof(struct rip_packet));
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}
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static inline struct rip_block_auth *
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rip_get_auth_block(struct rip_iface *ifa, struct rip_packet *pkt)
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{
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return (void *) ((byte *) pkt + sizeof(struct rip_packet) +
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(ifa->cf->demand_circuit ? sizeof(struct rip_update_hdr) : 0));
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}
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static inline void
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rip_put_block(struct rip_proto *p, byte *pos, struct rip_block *rte)
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@ -199,10 +234,31 @@ rip_update_csn(struct rip_proto *p UNUSED, struct rip_iface *ifa)
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}
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}
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static inline void
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rip_fill_header(struct rip_iface *ifa, struct rip_packet *pkt, uint cmd)
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{
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*pkt = (struct rip_packet) {
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.command = cmd,
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.version = ifa->cf->version
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};
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}
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static inline void
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rip_fill_update_hdr(struct rip_packet *pkt, uint flush, uint seqnum)
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{
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struct rip_update_hdr *hdr = rip_get_update_hdr(pkt);
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*hdr = (struct rip_update_hdr) {
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.version = RIP_UPDATE_VERSION,
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.flush = flush,
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.seqnum = htons(seqnum)
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};
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}
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static void
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rip_fill_authentication(struct rip_proto *p, struct rip_iface *ifa, struct rip_packet *pkt, uint *plen)
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{
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struct rip_block_auth *auth = (void *) (pkt + 1);
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struct rip_block_auth *auth = rip_get_auth_block(ifa, pkt);
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struct password_item *pass = password_find(ifa->cf->passwords, 0);
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if (!pass)
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@ -271,16 +327,16 @@ rip_fill_authentication(struct rip_proto *p, struct rip_iface *ifa, struct rip_p
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}
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static int
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rip_check_authentication(struct rip_proto *p, struct rip_iface *ifa, struct rip_packet *pkt, uint *plen, struct rip_neighbor *n)
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rip_check_authentication(struct rip_proto *p, struct rip_iface *ifa, struct rip_packet *pkt, uint *plen, uint hdr_len, struct rip_neighbor *n)
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{
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struct rip_block_auth *auth = (void *) (pkt + 1);
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struct rip_block_auth *auth = (void *) ((byte *) pkt + hdr_len);
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struct password_item *pass = NULL;
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const char *err_dsc = NULL;
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uint err_val = 0;
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uint auth_type = 0;
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/* Check for authentication entry */
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if ((*plen >= (sizeof(struct rip_packet) + sizeof(struct rip_block_auth))) &&
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if ((*plen >= (hdr_len + sizeof(struct rip_block_auth))) &&
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(auth->must_be_ffff == htons(0xffff)))
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auth_type = ntohs(auth->auth_type);
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@ -376,17 +432,31 @@ rip_send_to(struct rip_proto *p, struct rip_iface *ifa, struct rip_packet *pkt,
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return sk_send_to(ifa->sk, plen, dst, 0);
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}
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static inline void
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rip_kick_rxmt_timer(struct rip_iface *ifa)
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{
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if (! tm_active(ifa->rxmt_timer))
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tm_start(ifa->rxmt_timer, ifa->cf->rxmt_time);
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}
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void
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rip_send_request(struct rip_proto *p, struct rip_iface *ifa)
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{
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byte *pos = rip_tx_buffer(ifa);
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struct rip_packet *pkt = rip_tx_buffer(ifa);
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byte *pos = (byte *) pkt + rip_pkt_hdrlen(ifa);
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struct rip_packet *pkt = (void *) pos;
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pkt->command = RIP_CMD_REQUEST;
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pkt->version = ifa->cf->version;
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pkt->unused = 0;
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pos += rip_pkt_hdrlen(ifa);
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rip_fill_header(ifa, pkt, RIP_CMD_REQUEST);
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if (ifa->cf->demand_circuit)
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{
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pkt->command = RIP_CMD_UPDATE_REQUEST;
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rip_fill_update_hdr(pkt, 0, 0);
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/* Must be acknowledged by update response */
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ifa->req_pending = 1;
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rip_kick_rxmt_timer(ifa);
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}
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struct rip_block b = { .no_af = 1, .metric = p->infinity };
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rip_put_block(p, pos, &b);
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@ -437,18 +507,25 @@ rip_send_response(struct rip_proto *p, struct rip_iface *ifa)
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if (! ifa->tx_active)
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return 0;
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byte *pos = rip_tx_buffer(ifa);
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byte *max = rip_tx_buffer(ifa) + ifa->tx_plen -
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/* In demand circuit mode, we may wait for ACK */
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if (ifa->tx_pending)
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return 0;
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struct rip_packet *pkt = rip_tx_buffer(ifa);
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byte *pos = (byte *) pkt + rip_pkt_hdrlen(ifa);
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byte *max = (byte *) pkt + ifa->tx_plen -
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(rip_is_v2(p) ? RIP_BLOCK_LENGTH : 2*RIP_BLOCK_LENGTH);
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ip_addr last_next_hop = IPA_NONE;
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btime now_ = current_time();
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int send = 0;
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struct rip_packet *pkt = (void *) pos;
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pkt->command = RIP_CMD_RESPONSE;
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pkt->version = ifa->cf->version;
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pkt->unused = 0;
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pos += rip_pkt_hdrlen(ifa);
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rip_fill_header(ifa, pkt, RIP_CMD_RESPONSE);
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if (ifa->cf->demand_circuit)
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{
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pkt->command = RIP_CMD_UPDATE_RESPONSE;
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rip_fill_update_hdr(pkt, ifa->tx_flush, ifa->tx_seqnum);
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}
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FIB_ITERATE_START(&p->rtable, &ifa->tx_fit, struct rip_entry, en)
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{
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@ -469,7 +546,7 @@ rip_send_response(struct rip_proto *p, struct rip_iface *ifa)
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if (pos > max)
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{
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FIB_ITERATE_PUT(&ifa->tx_fit);
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goto break_loop;
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goto send_pkt;
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}
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struct rip_block rte = {
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@ -522,13 +599,31 @@ rip_send_response(struct rip_proto *p, struct rip_iface *ifa)
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next_entry: ;
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}
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FIB_ITERATE_END;
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ifa->tx_active = 0;
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if (send)
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{
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FIB_ITERATE_PUT_END(&ifa->tx_fit);
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goto send_pkt;
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}
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/* Do not send empty packet */
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if (!send)
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return 0;
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break_loop:
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ifa->tx_active = 0;
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/* Unlink second iterator */
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FIB_ITERATE_UNLINK(&ifa->tx_done, &p->rtable);
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return 0;
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send_pkt:
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/* Waiting for ack or timeout */
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if (ifa->cf->demand_circuit)
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{
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ifa->tx_pending = 1;
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rip_kick_rxmt_timer(ifa);
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}
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TRACE(D_PACKETS, "Sending response via %s", ifa->iface->name);
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return rip_send_to(p, ifa, pkt, pos - (byte *) pkt, ifa->tx_addr);
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}
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@ -558,6 +653,10 @@ rip_send_table(struct rip_proto *p, struct rip_iface *ifa, ip_addr addr, btime c
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ifa->tx_addr = addr;
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ifa->tx_changed = changed;
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FIB_ITERATE_INIT(&ifa->tx_fit, &p->rtable);
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FIB_ITERATE_INIT(&ifa->tx_done, &p->rtable);
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if (ifa->cf->demand_circuit)
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ifa->tx_flush = ! changed;
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rip_update_csn(p, ifa);
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@ -597,9 +696,27 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
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TRACE(D_PACKETS, "Response received from %I on %s", from->nbr->addr, ifa->iface->name);
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byte *pos = (byte *) pkt + sizeof(struct rip_packet);
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byte *pos = (byte *) pkt + rip_pkt_hdrlen(ifa);
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byte *end = (byte *) pkt + plen;
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btime now_ = current_time();
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btime expires = current_time() + ifa->cf->timeout_time;
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if (pkt->command == RIP_CMD_UPDATE_RESPONSE)
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{
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struct rip_update_hdr *hdr = rip_get_update_hdr(pkt);
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rip_send_ack(p, ifa, hdr->flush, ntohs(hdr->seqnum));
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expires = TIME_INFINITY;
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/* Handle flush bit */
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if (hdr->flush)
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{
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/* Flush old routes */
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rip_flush_table(p, from);
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/* Acknowledge pending request */
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ifa->req_pending = 0;
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}
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}
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for (; pos < end; pos += RIP_BLOCK_LENGTH)
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{
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@ -647,7 +764,7 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
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.next_hop = ipa_nonzero(rte.next_hop) ? rte.next_hop : from->nbr->addr,
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.metric = rte.metric,
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.tag = rte.tag,
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.expires = now_ + ifa->cf->timeout_time
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.expires = expires
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};
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rip_update_rte(p, &rte.net, &new);
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@ -663,6 +780,85 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
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}
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}
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static int
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rip_send_ack(struct rip_proto *p, struct rip_iface *ifa, uint flush, uint seqnum)
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{
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struct rip_packet *pkt = rip_tx_buffer(ifa);
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rip_fill_header(ifa, pkt, RIP_CMD_UPDATE_ACK);
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rip_fill_update_hdr(pkt, flush, seqnum);
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TRACE(D_PACKETS, "Sending acknowledge via %s", ifa->iface->name);
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return rip_send_to(p, ifa, pkt, rip_pkt_hdrlen(ifa), ifa->tx_addr);
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}
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static void
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rip_receive_ack(struct rip_proto *p, struct rip_iface *ifa, struct rip_packet *pkt, uint plen UNUSED, struct rip_neighbor *from)
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{
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TRACE(D_PACKETS, "Acknowledge received from %I on %s", from->nbr->addr, ifa->iface->name);
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struct rip_update_hdr *hdr = rip_get_update_hdr(pkt);
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uint seqnum = ntohs(hdr->seqnum);
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if (! ifa->tx_active || ! ifa->tx_pending)
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{
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LOG_PKT("Bad acknowledge packet from %I via %s - no pending response",
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from->nbr->addr, ifa->iface->name);
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return;
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}
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if (seqnum != ifa->tx_seqnum)
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{
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LOG_PKT("Bad acknowledge packet from %I via %s - "
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"mismatched sequence number (rcv %u, old %u)",
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from->nbr->addr, ifa->iface->name, seqnum, (uint) ifa->tx_seqnum);
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return;
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}
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/* Move acked position */
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FIB_ITERATE_COPY(&ifa->tx_done, &ifa->tx_fit, &p->rtable);
|
||||
|
||||
/* Packet is no longer pending */
|
||||
ifa->tx_pending = 0;
|
||||
ifa->tx_seqnum++;
|
||||
|
||||
/* Next one does not have flush bit */
|
||||
ifa->tx_flush = 0;
|
||||
|
||||
rip_send_response(p, ifa);
|
||||
}
|
||||
|
||||
/**
|
||||
* rip_rxmt_timeout - RIP retransmission timer hook
|
||||
* @t: timer
|
||||
*
|
||||
* In Demand Circuit mode, update packets must be acknowledged to ensure
|
||||
* reliability. If they are not acknowledged, we need to retransmit them.
|
||||
*/
|
||||
void
|
||||
rip_rxmt_timeout(timer *t)
|
||||
{
|
||||
struct rip_iface *ifa = t->data;
|
||||
struct rip_proto *p = ifa->rip;
|
||||
|
||||
if (ifa->req_pending)
|
||||
rip_send_request(p, ifa);
|
||||
|
||||
if (ifa->tx_pending)
|
||||
{
|
||||
/* Revert to acked position */
|
||||
FIB_ITERATE_COPY(&ifa->tx_fit, &ifa->tx_done, &p->rtable);
|
||||
|
||||
/* Packet is no longer pending */
|
||||
ifa->tx_pending = 0;
|
||||
ifa->tx_seqnum++;
|
||||
|
||||
rip_send_response(p, ifa);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
rip_rx_hook(sock *sk, uint len)
|
||||
{
|
||||
@ -702,17 +898,43 @@ rip_rx_hook(sock *sk, uint len)
|
||||
DROP("truncated", len);
|
||||
|
||||
struct rip_packet *pkt = (struct rip_packet *) sk->rbuf;
|
||||
uint plen = len;
|
||||
uint pkt_len = len;
|
||||
uint hdr_len = sizeof(struct rip_packet);
|
||||
uint update_msg = 0;
|
||||
|
||||
if (!pkt->version || (ifa->cf->version_only && (pkt->version != ifa->cf->version)))
|
||||
DROP("wrong version", pkt->version);
|
||||
|
||||
/* Update packets (RFC 2091) have additional header even before auth data */
|
||||
if ((pkt->command == RIP_CMD_UPDATE_REQUEST) ||
|
||||
(pkt->command == RIP_CMD_UPDATE_RESPONSE) ||
|
||||
(pkt->command == RIP_CMD_UPDATE_ACK))
|
||||
{
|
||||
hdr_len += sizeof(struct rip_update_hdr);
|
||||
|
||||
if (len < hdr_len)
|
||||
DROP("too short", len);
|
||||
|
||||
struct rip_update_hdr *hdr = rip_get_update_hdr(pkt);
|
||||
|
||||
if (hdr->version != RIP_UPDATE_VERSION)
|
||||
DROP("wrong update header version", hdr->version);
|
||||
|
||||
if (hdr->flush > 1)
|
||||
DROP("wrong flush value", hdr->flush);
|
||||
|
||||
update_msg = 1;
|
||||
}
|
||||
|
||||
/* rip_check_authentication() has its own error logging */
|
||||
if (rip_is_v2(p) && !rip_check_authentication(p, ifa, pkt, &plen, n))
|
||||
if (rip_is_v2(p) && !rip_check_authentication(p, ifa, pkt, &pkt_len, hdr_len, n))
|
||||
return 1;
|
||||
|
||||
if ((plen - sizeof(struct rip_packet)) % RIP_BLOCK_LENGTH)
|
||||
DROP("invalid length", plen);
|
||||
if ((pkt_len - hdr_len) % RIP_BLOCK_LENGTH)
|
||||
DROP("invalid length", pkt_len);
|
||||
|
||||
if (update_msg != ifa->cf->demand_circuit)
|
||||
DROP("demand circuit mode mismatch", update_msg);
|
||||
|
||||
n->last_seen = current_time();
|
||||
rip_update_bfd(p, n);
|
||||
@ -720,11 +942,17 @@ rip_rx_hook(sock *sk, uint len)
|
||||
switch (pkt->command)
|
||||
{
|
||||
case RIP_CMD_REQUEST:
|
||||
rip_receive_request(p, ifa, pkt, plen, n);
|
||||
case RIP_CMD_UPDATE_REQUEST:
|
||||
rip_receive_request(p, ifa, pkt, pkt_len, n);
|
||||
break;
|
||||
|
||||
case RIP_CMD_RESPONSE:
|
||||
rip_receive_response(p, ifa, pkt, plen, n);
|
||||
case RIP_CMD_UPDATE_RESPONSE:
|
||||
rip_receive_response(p, ifa, pkt, pkt_len, n);
|
||||
break;
|
||||
|
||||
case RIP_CMD_UPDATE_ACK:
|
||||
rip_receive_ack(p, ifa, pkt, pkt_len, n);
|
||||
break;
|
||||
|
||||
default:
|
||||
|
||||
@ -368,6 +368,20 @@ rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, s
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
rip_flush_table(struct rip_proto *p, struct rip_neighbor *n)
|
||||
{
|
||||
btime expires = current_time() + n->ifa->cf->timeout_time;
|
||||
|
||||
FIB_WALK(&p->rtable, struct rip_entry, en)
|
||||
{
|
||||
for (struct rip_rte *e = en->routes; e; e = e->next)
|
||||
if ((e->from == n) && (e->expires == TIME_INFINITY))
|
||||
e->expires = expires;
|
||||
}
|
||||
FIB_WALK_END;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* RIP neighbors
|
||||
@ -506,14 +520,20 @@ rip_iface_start(struct rip_iface *ifa)
|
||||
|
||||
TRACE(D_EVENTS, "Starting interface %s", ifa->iface->name);
|
||||
|
||||
ifa->next_regular = current_time() + (random() % ifa->cf->update_time) + 100 MS;
|
||||
ifa->next_triggered = current_time(); /* Available immediately */
|
||||
ifa->want_triggered = 1; /* All routes in triggered update */
|
||||
tm_start(ifa->timer, 100 MS);
|
||||
if (! ifa->cf->demand_circuit)
|
||||
{
|
||||
ifa->next_regular = current_time() + (random() % ifa->cf->update_time) + 100 MS;
|
||||
tm_set(ifa->timer, ifa->next_regular);
|
||||
}
|
||||
else
|
||||
{
|
||||
ifa->next_regular = TIME_INFINITY;
|
||||
}
|
||||
|
||||
ifa->up = 1;
|
||||
|
||||
if (!ifa->cf->passive)
|
||||
rip_send_request(ifa->rip, ifa);
|
||||
rip_send_request(p, ifa);
|
||||
rip_send_table(p, ifa, ifa->addr, 0);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -526,10 +546,18 @@ rip_iface_stop(struct rip_iface *ifa)
|
||||
|
||||
rip_reset_tx_session(p, ifa);
|
||||
|
||||
ifa->next_regular = 0;
|
||||
ifa->next_triggered = 0;
|
||||
ifa->want_triggered = 0;
|
||||
|
||||
ifa->tx_pending = 0;
|
||||
ifa->req_pending = 0;
|
||||
|
||||
WALK_LIST_FIRST(n, ifa->neigh_list)
|
||||
rip_remove_neighbor(p, n);
|
||||
|
||||
tm_stop(ifa->timer);
|
||||
tm_stop(ifa->rxmt_timer);
|
||||
ifa->up = 0;
|
||||
}
|
||||
|
||||
@ -643,6 +671,7 @@ rip_add_iface(struct rip_proto *p, struct iface *iface, struct rip_iface_config
|
||||
add_tail(&p->iface_list, NODE ifa);
|
||||
|
||||
ifa->timer = tm_new_init(p->p.pool, rip_iface_timer, ifa, 0, 0);
|
||||
ifa->rxmt_timer = tm_new_init(p->p.pool, rip_rxmt_timeout, ifa, 0, 0);
|
||||
|
||||
struct object_lock *lock = olock_new(p->p.pool);
|
||||
lock->type = OBJLOCK_UDP;
|
||||
@ -885,6 +914,11 @@ rip_timer(timer *t)
|
||||
|
||||
/* Handling neighbor expiration */
|
||||
WALK_LIST(ifa, p->iface_list)
|
||||
{
|
||||
/* No expiration for demand circuit ifaces */
|
||||
if (ifa->cf->demand_circuit)
|
||||
continue;
|
||||
|
||||
WALK_LIST_DELSAFE(n, nn, ifa->neigh_list)
|
||||
if (n->last_seen)
|
||||
{
|
||||
@ -895,6 +929,7 @@ rip_timer(timer *t)
|
||||
else
|
||||
next = MIN(next, expires);
|
||||
}
|
||||
}
|
||||
|
||||
tm_start(p->timer, MAX(next - now_, 100 MS));
|
||||
}
|
||||
@ -902,7 +937,7 @@ rip_timer(timer *t)
|
||||
static inline void
|
||||
rip_kick_timer(struct rip_proto *p)
|
||||
{
|
||||
if (p->timer->expires > (current_time() + 100 MS))
|
||||
if ((p->timer->expires > (current_time() + 100 MS)))
|
||||
tm_start(p->timer, 100 MS);
|
||||
}
|
||||
|
||||
@ -931,11 +966,8 @@ rip_iface_timer(timer *t)
|
||||
|
||||
if (ifa->tx_active)
|
||||
{
|
||||
if (now_ < (ifa->next_regular + period))
|
||||
{ tm_start(ifa->timer, 100 MS); return; }
|
||||
|
||||
/* We are too late, reset is done by rip_send_table() */
|
||||
log(L_WARN "%s: Too slow update on %s, resetting", p->p.name, ifa->iface->name);
|
||||
tm_start(ifa->timer, 100 MS);
|
||||
return;
|
||||
}
|
||||
|
||||
if (now_ >= ifa->next_regular)
|
||||
@ -957,13 +989,17 @@ rip_iface_timer(timer *t)
|
||||
p->triggered = 0;
|
||||
}
|
||||
|
||||
tm_start(ifa->timer, ifa->want_triggered ? (1 S) : (ifa->next_regular - now_));
|
||||
if (ifa->want_triggered && (ifa->next_triggered < ifa->next_regular))
|
||||
tm_set(ifa->timer, ifa->next_triggered);
|
||||
else if (ifa->next_regular != TIME_INFINITY)
|
||||
tm_set(ifa->timer, ifa->next_regular);
|
||||
}
|
||||
|
||||
|
||||
static inline void
|
||||
rip_iface_kick_timer(struct rip_iface *ifa)
|
||||
{
|
||||
if (ifa->timer->expires > (current_time() + 100 MS))
|
||||
if ((! tm_active(ifa->timer)) || (ifa->timer->expires > (current_time() + 100 MS)))
|
||||
tm_start(ifa->timer, 100 MS);
|
||||
}
|
||||
|
||||
@ -987,9 +1023,8 @@ rip_trigger_update(struct rip_proto *p)
|
||||
TRACE(D_EVENTS, "Scheduling triggered updates for %s", ifa->iface->name);
|
||||
ifa->want_triggered = current_time();
|
||||
rip_iface_kick_timer(ifa);
|
||||
p->triggered = 1;
|
||||
}
|
||||
|
||||
p->triggered = 1;
|
||||
}
|
||||
|
||||
|
||||
@ -1179,7 +1214,8 @@ rip_show_interfaces(struct proto *P, char *iff)
|
||||
nbrs++;
|
||||
|
||||
btime now_ = current_time();
|
||||
btime timer = (ifa->next_regular > now_) ? (ifa->next_regular - now_) : 0;
|
||||
btime timer = ((ifa->next_regular < TIME_INFINITY) && (ifa->next_regular > now_)) ?
|
||||
(ifa->next_regular - now_) : 0;
|
||||
cli_msg(-1021, "%-10s %-6s %6u %6u %7t",
|
||||
ifa->iface->name, (ifa->up ? "Up" : "Down"), ifa->cf->metric, nbrs, timer);
|
||||
}
|
||||
|
||||
@ -41,6 +41,7 @@
|
||||
#define RIP_DEFAULT_UPDATE_TIME (30 S_)
|
||||
#define RIP_DEFAULT_TIMEOUT_TIME (180 S_)
|
||||
#define RIP_DEFAULT_GARBAGE_TIME (120 S_)
|
||||
#define RIP_DEFAULT_RXMT_TIME (1 S_)
|
||||
|
||||
|
||||
struct rip_config
|
||||
@ -73,6 +74,7 @@ struct rip_iface_config
|
||||
u8 auth_type; /* Authentication type (RIP_AUTH_*) */
|
||||
u8 ttl_security; /* bool + 2 for TX only (send, but do not check on RX) */
|
||||
u8 check_link; /* Whether iface link change is used */
|
||||
u8 demand_circuit; /* Use demand circuit extensions (RFC 2091) */
|
||||
u8 bfd; /* Use BFD on iface */
|
||||
u16 rx_buffer; /* RX buffer size, 0 for MTU */
|
||||
u16 tx_length; /* TX packet length limit (including headers), 0 for MTU */
|
||||
@ -81,6 +83,7 @@ struct rip_iface_config
|
||||
btime update_time; /* Periodic update interval */
|
||||
btime timeout_time; /* Route expiration timeout */
|
||||
btime garbage_time; /* Unreachable entry GC timeout */
|
||||
btime rxmt_time; /* Retransmit timeout for demand circuit */
|
||||
list *passwords; /* Passwords for authentication */
|
||||
};
|
||||
|
||||
@ -110,6 +113,7 @@ struct rip_iface
|
||||
struct rip_iface_config *cf; /* Related config, must be updated in reconfigure */
|
||||
struct object_lock *lock; /* Interface lock */
|
||||
timer *timer; /* Interface timer */
|
||||
timer *rxmt_timer; /* Retransmission timer */
|
||||
sock *sk; /* UDP socket */
|
||||
|
||||
u8 up; /* Interface is active */
|
||||
@ -126,9 +130,18 @@ struct rip_iface
|
||||
|
||||
/* Active update */
|
||||
int tx_active; /* Update session is active */
|
||||
int tx_waiting;
|
||||
ip_addr tx_addr; /* Update session destination address */
|
||||
btime tx_changed; /* Minimal changed time for triggered update */
|
||||
struct fib_iterator tx_fit; /* FIB iterator in RIP routing table (p.rtable) */
|
||||
struct fib_iterator tx_done; /* FIB iterator for acked routes (p.rtable) */
|
||||
|
||||
/* Update message */
|
||||
u8 tx_pending;
|
||||
u8 tx_flush;
|
||||
u16 tx_seqnum;
|
||||
|
||||
u8 req_pending;
|
||||
};
|
||||
|
||||
struct rip_neighbor
|
||||
@ -197,6 +210,7 @@ rip_reset_tx_session(struct rip_proto *p, struct rip_iface *ifa)
|
||||
if (ifa->tx_active)
|
||||
{
|
||||
FIB_ITERATE_UNLINK(&ifa->tx_fit, &p->rtable);
|
||||
FIB_ITERATE_UNLINK(&ifa->tx_done, &p->rtable);
|
||||
ifa->tx_active = 0;
|
||||
}
|
||||
}
|
||||
@ -204,6 +218,7 @@ rip_reset_tx_session(struct rip_proto *p, struct rip_iface *ifa)
|
||||
/* rip.c */
|
||||
void rip_update_rte(struct rip_proto *p, net_addr *n, struct rip_rte *new);
|
||||
void rip_withdraw_rte(struct rip_proto *p, net_addr *n, struct rip_neighbor *from);
|
||||
void rip_flush_table(struct rip_proto *p, struct rip_neighbor *n);
|
||||
struct rip_neighbor * rip_get_neighbor(struct rip_proto *p, ip_addr *a, struct rip_iface *ifa);
|
||||
void rip_update_bfd(struct rip_proto *p, struct rip_neighbor *n);
|
||||
void rip_show_interfaces(struct proto *P, char *iff);
|
||||
@ -212,6 +227,7 @@ void rip_show_neighbors(struct proto *P, char *iff);
|
||||
/* packets.c */
|
||||
void rip_send_request(struct rip_proto *p, struct rip_iface *ifa);
|
||||
void rip_send_table(struct rip_proto *p, struct rip_iface *ifa, ip_addr addr, btime changed);
|
||||
void rip_rxmt_timeout(timer *t);
|
||||
int rip_open_socket(struct rip_iface *ifa);
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user