/* Copyright 2004 Linux Networx */ #ifdef PROTO_LACP #if 0 #include "etherboot.h" #include "nic.h" #include "timer.h" #endif #define LACP_DEBUG 0 /* Structure definitions originally taken from the linux bond_3ad driver */ #define SLOW_DST_MAC "\x01\x80\xc2\x00\x00\x02" static const char slow_dest[] = SLOW_DST_MAC; #define SLOW_SUBTYPE_LACP 1 #define SLOW_SUBTYPE_MARKER 2 struct slow_header { uint8_t subtype; }; struct lacp_info { uint16_t system_priority; uint8_t system[ETH_ALEN]; uint16_t key; uint16_t port_priority; uint16_t port; uint8_t state; uint8_t reserved[3]; } PACKED; #define LACP_CMP_LEN (2 + 6 + 2 + 2 + 2) #define LACP_CP_LEN (2 + 6 + 2 + 2 + 2 + 1) /* Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard) */ struct slow_lacp { uint8_t subtype; /* = LACP(= 0x01) */ uint8_t version_number; uint8_t tlv_type_actor_info; /* = actor information(type/length/value) */ #define LACP_TLV_TERMINATOR 0 #define LACP_TLV_ACTOR 1 #define LACP_TLV_PARTNER 2 #define LACP_TLV_COLLECTOR 3 uint8_t actor_information_length; /* = 20 */ struct lacp_info actor; uint8_t tlv_type_partner_info; /* = partner information */ uint8_t partner_information_length; /* = 20 */ struct lacp_info partner; uint8_t tlv_type_collector_info; /* = collector information */ uint8_t collector_information_length; /* = 16 */ uint16_t collector_max_delay; uint8_t reserved_12[12]; uint8_t tlv_type_terminator; /* = terminator */ uint8_t terminator_length; /* = 0 */ uint8_t reserved_50[50]; /* = 0 */ } PACKED; /* Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard) */ struct slow_marker { uint8_t subtype; /* = 0x02 (marker PDU) */ uint8_t version_number; /* = 0x01 */ uint8_t tlv_type; #define MARKER_TLV_TERMINATOR 0 /* marker terminator */ #define MARKER_TLV_INFO 1 /* marker information */ #define MARKER_TLV_RESPONSE 2 /* marker response information */ uint8_t marker_length; /* = 0x16 */ uint16_t requester_port; /* The number assigned to the port by the requester */ uint8_t requester_system[ETH_ALEN]; /* The requester's system id */ uint32_t requester_transaction_id; /* The transaction id allocated by the requester, */ uint16_t pad; /* = 0 */ uint8_t tlv_type_terminator; /* = 0x00 */ uint8_t terminator_length; /* = 0x00 */ uint8_t reserved_90[90]; /* = 0 */ } PACKED; union slow_union { struct slow_header header; struct slow_lacp lacp; struct slow_marker marker; }; #define FAST_PERIODIC_TIME (1*TICKS_PER_SEC) #define SLOW_PERIODIC_TIME (30*TICKS_PER_SEC) #define SHORT_TIMEOUT_TIME (3*FAST_PERIODIC_TIME) #define LONG_TIMEOUT_TIME (3*SLOW_PERIODIC_TIME) #define CHURN_DETECTION_TIME (60*TICKS_PER_SEC) #define AGGREGATE_WAIT_TIME (2*TICKS_PER_SEC) #define LACP_ACTIVITY (1 << 0) #define LACP_TIMEOUT (1 << 1) #define LACP_AGGREGATION (1 << 2) #define LACP_SYNCHRONIZATION (1 << 3) #define LACP_COLLECTING (1 << 4) #define LACP_DISTRIBUTING (1 << 5) #define LACP_DEFAULTED (1 << 6) #define LACP_EXPIRED (1 << 7) #define UNSELECTED 0 #define STANDBY 1 #define SELECTED 2 struct lacp_state { struct slow_lacp pkt; unsigned long current_while_timer; /* Time when the LACP information expires */ unsigned long periodic_timer; /* Time when I need to send my partner an update */ }; static struct lacp_state lacp; #if LACP_DEBUG > 0 static void print_lacp_state(uint8_t state) { printf("%hhx", state); if (state & LACP_ACTIVITY) { printf(" Activity"); } if (state & LACP_TIMEOUT) { printf(" Timeout"); } if (state & LACP_AGGREGATION) { printf(" Aggregation"); } if (state & LACP_SYNCHRONIZATION) { printf(" Syncronization"); } if (state & LACP_COLLECTING) { printf(" Collecting"); } if (state & LACP_DISTRIBUTING) { printf(" Distributing"); } if (state & LACP_DEFAULTED) { printf(" Defaulted"); } if (state & LACP_EXPIRED) { printf(" Expired"); } printf("\n"); } static inline void print_lacpdu(struct slow_lacp *pkt) { printf("subtype version: %hhx %hhx\n", pkt->subtype, pkt->version_number); printf("actor_tlv %hhx", pkt->tlv_type_actor_info); printf(" len: %hhx (\n", pkt->actor_information_length); printf(" sys_pri: %hx", ntohs(pkt->actor.system_priority)); printf(" mac: %!", pkt->actor.system); printf(" key: %hx", ntohs(pkt->actor.key)); printf(" port_pri: %hx", ntohs(pkt->actor.port_priority)); printf(" port: %hx\n", ntohs(pkt->actor.port)); printf(" state: "); print_lacp_state(pkt->actor.state); #if LACP_DEBUG > 1 printf(" reserved: %hhx %hhx %hhx\n", pkt->actor.reserved[0], pkt->actor.reserved[1], pkt->actor.reserved[2]); #endif printf(")\n"); printf("partner_tlv: %hhx", pkt->tlv_type_partner_info); printf(" len: %hhx (\n", pkt->partner_information_length); printf(" sys_pri: %hx", ntohs(pkt->partner.system_priority)); printf(" mac: %!", pkt->partner.system); printf(" key: %hx", ntohs(pkt->partner.key)); printf(" port_pri: %hx", ntohs(pkt->partner.port_priority)); printf(" port: %hx\n", ntohs(pkt->partner.port)); printf(" state: "); print_lacp_state(pkt->partner.state); #if LACP_DEBUG > 1 printf(" reserved: %hhx %hhx %hhx\n", pkt->partner.reserved[0], pkt->partner.reserved[1], pkt->partner.reserved[2]); #endif printf(")\n"); printf("collector_tlv: %hhx ", pkt->tlv_type_collector_info); printf(" len: %hhx (", pkt->collector_information_length); printf(" max_delay: %hx", ntohs(pkt->collector_max_delay)); #if LACP_DEBUG > 1 printf("reserved_12: %hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx\n", pkt->reserved_12[0], pkt->reserved_12[1], pkt->reserved_12[2], pkt->reserved_12[3], pkt->reserved_12[4], pkt->reserved_12[5], pkt->reserved_12[6], pkt->reserved_12[7], pkt->reserved_12[8], pkt->reserved_12[9], pkt->reserved_12[10], pkt->reserved_12[11]); #endif printf(" )\n"); printf("terminator_tlv: %hhx", pkt->tlv_type_terminator); printf(" len: %hhx ()\n", pkt->terminator_length); } static inline unsigned long lacp_timer_val(unsigned long now, unsigned long when) { return when?(when - now)/TICKS_PER_SEC : 0; } static void print_lacp(const char *which, struct slow_lacp *pkt, unsigned long now) { printf("%s\n", which); print_lacpdu(pkt); printf("timers: c %ds p %ds\n", lacp_timer_val(now, lacp.current_while_timer), lacp_timer_val(now, lacp.periodic_timer) ); printf("\n"); } #else /* LACP_DEBUG */ #define print_lacp(which, pkt, now) do {} while(0) #endif /* LACP_DEBUG */ static void lacp_init_state(const uint8_t *mac) { memset(&lacp, 0, sizeof(lacp)); /* Initialize the packet constants */ lacp.pkt.subtype = 1; lacp.pkt.version_number = 1; /* The default state of my interface */ lacp.pkt.tlv_type_actor_info = LACP_TLV_ACTOR; lacp.pkt.actor_information_length = 0x14; lacp.pkt.actor.system_priority = htons(1); memcpy(lacp.pkt.actor.system, mac, ETH_ALEN); lacp.pkt.actor.key = htons(1); lacp.pkt.actor.port = htons(1); lacp.pkt.actor.port_priority = htons(1); lacp.pkt.actor.state = LACP_SYNCHRONIZATION | LACP_COLLECTING | LACP_DISTRIBUTING | LACP_DEFAULTED; /* Set my partner defaults */ lacp.pkt.tlv_type_partner_info = LACP_TLV_PARTNER; lacp.pkt.partner_information_length = 0x14; lacp.pkt.partner.system_priority = htons(1); /* memset(lacp.pkt.parnter_system, 0, ETH_ALEN); */ lacp.pkt.partner.key = htons(1); lacp.pkt.partner.port = htons(1); lacp.pkt.partner.port_priority = htons(1); lacp.pkt.partner.state = LACP_ACTIVITY | LACP_SYNCHRONIZATION | LACP_COLLECTING | LACP_DISTRIBUTING | LACP_DEFAULTED; lacp.pkt.tlv_type_collector_info = LACP_TLV_COLLECTOR; lacp.pkt.collector_information_length = 0x10; lacp.pkt.collector_max_delay = htons(0x8000); /* ???? */ lacp.pkt.tlv_type_terminator = LACP_TLV_TERMINATOR; lacp.pkt.terminator_length = 0; } #define LACP_NTT_MASK (LACP_ACTIVITY | LACP_TIMEOUT | \ LACP_SYNCHRONIZATION | LACP_AGGREGATION) static inline int lacp_update_ntt(struct slow_lacp *pkt) { int ntt = 0; if ((memcmp(&pkt->partner, &lacp.pkt.actor, LACP_CMP_LEN) != 0) || ((pkt->partner.state & LACP_NTT_MASK) != (lacp.pkt.actor.state & LACP_NTT_MASK))) { ntt = 1; } return ntt; } static inline void lacp_record_pdu(struct slow_lacp *pkt) { memcpy(&lacp.pkt.partner, &pkt->actor, LACP_CP_LEN); lacp.pkt.actor.state &= ~LACP_DEFAULTED; lacp.pkt.partner.state &= ~LACP_SYNCHRONIZATION; if ((memcmp(&pkt->partner, &lacp.pkt.actor, LACP_CMP_LEN) == 0) && ((pkt->partner.state & LACP_AGGREGATION) == (lacp.pkt.actor.state & LACP_AGGREGATION))) { lacp.pkt.partner.state |= LACP_SYNCHRONIZATION; } if (!(pkt->actor.state & LACP_AGGREGATION)) { lacp.pkt.partner.state |= LACP_SYNCHRONIZATION; } /* ACTIVITY? */ } static inline int lacp_timer_expired(unsigned long now, unsigned long when) { return when && (now > when); } static inline void lacp_start_periodic_timer(unsigned long now) { if ((lacp.pkt.partner.state & LACP_ACTIVITY) || (lacp.pkt.actor.state & LACP_ACTIVITY)) { lacp.periodic_timer = now + (((lacp.pkt.partner.state & LACP_TIMEOUT)? FAST_PERIODIC_TIME : SLOW_PERIODIC_TIME)); } } static inline void lacp_start_current_while_timer(unsigned long now) { lacp.current_while_timer = now + ((lacp.pkt.actor.state & LACP_TIMEOUT) ? SHORT_TIMEOUT_TIME : LONG_TIMEOUT_TIME); lacp.pkt.actor.state &= ~LACP_EXPIRED; } static void send_lacp_reports(unsigned long now, int ntt) { if (memcmp(nic.node_addr, lacp.pkt.actor.system, ETH_ALEN) != 0) { lacp_init_state(nic.node_addr); } /* If the remote information has expired I need to take action */ if (lacp_timer_expired(now, lacp.current_while_timer)) { if (!(lacp.pkt.actor.state & LACP_EXPIRED)) { lacp.pkt.partner.state &= ~LACP_SYNCHRONIZATION; lacp.pkt.partner.state |= LACP_TIMEOUT; lacp.pkt.actor.state |= LACP_EXPIRED; lacp.current_while_timer = now + SHORT_TIMEOUT_TIME; ntt = 1; } else { lacp_init_state(nic.node_addr); } } /* If the periodic timer has expired I need to transmit */ if (lacp_timer_expired(now, lacp.periodic_timer)) { ntt = 1; /* Reset by lacp_start_periodic_timer */ } if (ntt) { eth_transmit(slow_dest, ETH_P_SLOW, sizeof(lacp.pkt), &lacp.pkt); /* Restart the periodic timer */ lacp_start_periodic_timer(now); print_lacp("Trasmitted", &lacp.pkt, now); } } static inline void send_eth_slow_reports(unsigned long now) { send_lacp_reports(now, 0); } static inline void process_eth_slow(unsigned short ptype, unsigned long now) { union slow_union *pkt; if ((ptype != ETH_P_SLOW) || (nic.packetlen < (ETH_HLEN + sizeof(pkt->header)))) { return; } pkt = (union slow_union *)&nic.packet[ETH_HLEN]; if ((pkt->header.subtype == SLOW_SUBTYPE_LACP) && (nic.packetlen >= ETH_HLEN + sizeof(pkt->lacp))) { int ntt; if (memcmp(nic.node_addr, lacp.pkt.actor.system, ETH_ALEN) != 0) { lacp_init_state(nic.node_addr); } /* As long as nic.packet is 2 byte aligned all is good */ print_lacp("Received", &pkt->lacp, now); /* I don't actually implement the MUX or SELECT * machines. * * What logically happens when the client and I * disagree about an aggregator is the current * aggregtator is unselected. The MUX machine places * me in DETACHED. The SELECT machine runs and * reslects the same aggregator. If I go through * these steps fast enough an outside observer can not * notice this. * * Since the process will not generate any noticeable * effect it does not need an implmenetation. This * keeps the code simple and the code and binary * size down. */ /* lacp_update_selected(&pkt->lacp); */ ntt = lacp_update_ntt(&pkt->lacp); lacp_record_pdu(&pkt->lacp); lacp_start_current_while_timer(now); send_lacp_reports(now, ntt); } /* If we receive a marker information packet return it */ else if ((pkt->header.subtype == SLOW_SUBTYPE_MARKER) && (nic.packetlen >= ETH_HLEN + sizeof(pkt->marker)) && (pkt->marker.tlv_type == MARKER_TLV_INFO) && (pkt->marker.marker_length == 0x16)) { pkt->marker.tlv_type = MARKER_TLV_RESPONSE; eth_transmit(slow_dest, ETH_P_SLOW, sizeof(pkt->marker), &pkt->marker); } } #else #define send_eth_slow_reports(now) do {} while(0) #define process_eth_slow(ptype, now) do {} while(0) #endif