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11128587 | 1 | /* |
2a333e0f | 2 | * IP MSDP for Quagga |
11128587 | 3 | * Copyright (C) 2016 Cumulus Networks, Inc. |
11128587 DS |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; see the file COPYING; if not, write to the | |
17 | * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | * MA 02110-1301 USA | |
19 | */ | |
20 | #ifndef PIM_MSDP_H | |
21 | #define PIM_MSDP_H | |
22 | ||
2a333e0f | 23 | enum pim_msdp_peer_state { |
24 | PIM_MSDP_DISABLED, | |
25 | PIM_MSDP_INACTIVE, | |
26 | PIM_MSDP_LISTEN, | |
27 | PIM_MSDP_CONNECTING, | |
28 | PIM_MSDP_ESTABLISHED | |
29 | }; | |
11128587 | 30 | |
2a333e0f | 31 | /* SA and KA TLVs are processed; rest ignored */ |
32 | enum pim_msdp_tlv { | |
33 | PIM_MSDP_V4_SOURCE_ACTIVE = 1, | |
34 | PIM_MSDP_V4_SOURCE_ACTIVE_REQUEST, | |
35 | PIM_MSDP_V4_SOURCE_ACTIVE_RESPONSE, | |
36 | PIM_MSDP_KEEPALIVE, | |
37 | PIM_MSDP_RESERVED, | |
38 | PIM_MSDP_TRACEROUTE_PROGRESS, | |
39 | PIM_MSDP_TRACEROUTE_REPLY, | |
40 | }; | |
41 | ||
42 | /* MSDP error codes */ | |
43 | enum pim_msdp_err { | |
44 | PIM_MSDP_ERR_NONE = 0, | |
45 | PIM_MSDP_ERR_OOM = -1, | |
46 | PIM_MSDP_ERR_PEER_EXISTS = -2, | |
47 | PIM_MSDP_ERR_MAX_MESH_GROUPS = -3, | |
48 | PIM_MSDP_ERR_NO_PEER = -4, | |
977d71cc | 49 | PIM_MSDP_ERR_MG_MBR_EXISTS = -5, |
50 | PIM_MSDP_ERR_NO_MG = -6, | |
51 | PIM_MSDP_ERR_NO_MG_MBR = -7, | |
52 | PIM_MSDP_ERR_SIP_EQ_DIP = -8, | |
2a333e0f | 53 | }; |
54 | ||
55 | #define PIM_MSDP_STATE_STRLEN 16 | |
2a333e0f | 56 | #define PIM_MSDP_UPTIME_STRLEN 80 |
977d71cc | 57 | #define PIM_MSDP_TIMER_STRLEN 12 |
2a333e0f | 58 | #define PIM_MSDP_TCP_PORT 639 |
59 | #define PIM_MSDP_SOCKET_SNDBUF_SIZE 65536 | |
60 | ||
3c72d654 | 61 | enum pim_msdp_sa_flags { |
62 | PIM_MSDP_SAF_NONE = 0, | |
63 | /* There are two cases where we can pickup an active source locally - | |
64 | * 1. We are RP and got a source-register from the FHR | |
65 | * 2. We are RP and FHR and learnt a new directly connected source on a | |
66 | * DR interface */ | |
67 | PIM_MSDP_SAF_LOCAL = (1 << 0), | |
68 | /* We got this in the MSDP SA TLV from a peer (and this passed peer-RPF | |
69 | * checks) */ | |
70 | PIM_MSDP_SAF_PEER = (1 << 1), | |
71 | PIM_MSDP_SAF_REF = (PIM_MSDP_SAF_LOCAL | PIM_MSDP_SAF_PEER), | |
36e466fe | 72 | PIM_MSDP_SAF_STALE = (1 << 2), /* local entries can get kicked out on |
3c72d654 | 73 | * misc pim events such as RP change */ |
36e466fe | 74 | PIM_MSDP_SAF_UP_DEL_IN_PROG = (1 << 3) |
3c72d654 | 75 | }; |
76 | ||
77 | struct pim_msdp_sa { | |
78 | struct prefix_sg sg; | |
8bfb8b67 | 79 | char sg_str[PIM_SG_LEN]; |
3c72d654 | 80 | struct in_addr rp; /* Last RP address associated with this SA */ |
81 | struct in_addr peer; /* last peer from who we heard this SA */ | |
82 | enum pim_msdp_sa_flags flags; | |
83 | ||
84 | /* rfc-3618 is missing default value for SA-hold-down-Period. pulled | |
85 | * this number from industry-standards */ | |
86 | #define PIM_MSDP_SA_HOLD_TIME ((3*60)+30) | |
87 | struct thread *sa_state_timer; // 5.6 | |
88 | int64_t uptime; | |
7667c556 | 89 | |
90 | struct pim_upstream *up; | |
3c72d654 | 91 | }; |
92 | ||
2a333e0f | 93 | enum pim_msdp_peer_flags { |
94 | PIM_MSDP_PEERF_NONE = 0, | |
3c72d654 | 95 | PIM_MSDP_PEERF_LISTENER = (1 << 0), |
96 | #define PIM_MSDP_PEER_IS_LISTENER(mp) (mp->flags & PIM_MSDP_PEERF_LISTENER) | |
97 | PIM_MSDP_PEERF_SA_JUST_SENT = (1 << 1) | |
2a333e0f | 98 | }; |
99 | ||
100 | struct pim_msdp_peer { | |
101 | /* configuration */ | |
102 | struct in_addr local; | |
103 | struct in_addr peer; | |
104 | char *mesh_group_name; | |
15ad0c71 | 105 | char key_str[INET_ADDRSTRLEN]; |
2a333e0f | 106 | |
107 | /* state */ | |
108 | enum pim_msdp_peer_state state; | |
109 | enum pim_msdp_peer_flags flags; | |
110 | ||
111 | /* TCP socket info */ | |
112 | union sockunion su_local; | |
113 | union sockunion su_peer; | |
114 | int fd; | |
115 | ||
116 | /* protocol timers */ | |
117 | #define PIM_MSDP_PEER_HOLD_TIME 75 | |
118 | struct thread *hold_timer; // 5.4 | |
119 | #define PIM_MSDP_PEER_KA_TIME 60 | |
11128587 | 120 | struct thread *ka_timer; // 5.5 |
2a333e0f | 121 | #define PIM_MSDP_PEER_CONNECT_RETRY_TIME 30 |
122 | struct thread *cr_timer; // 5.6 | |
123 | ||
124 | /* packet thread and buffers */ | |
3c72d654 | 125 | uint32_t packet_size; |
2a333e0f | 126 | struct stream *ibuf; |
127 | struct stream_fifo *obuf; | |
128 | struct thread *t_read; | |
129 | struct thread *t_write; | |
130 | ||
131 | /* stats */ | |
977d71cc | 132 | uint32_t conn_attempts; |
133 | uint32_t est_flaps; | |
15ad0c71 | 134 | uint32_t sa_cnt; /* number of SAs attributed to this peer */ |
977d71cc | 135 | #define PIM_MSDP_PEER_LAST_RESET_STR 20 |
136 | char last_reset[PIM_MSDP_PEER_LAST_RESET_STR]; | |
137 | ||
138 | /* packet stats */ | |
2a333e0f | 139 | uint32_t ka_tx_cnt; |
140 | uint32_t sa_tx_cnt; | |
141 | uint32_t ka_rx_cnt; | |
142 | uint32_t sa_rx_cnt; | |
143 | uint32_t unk_rx_cnt; | |
144 | ||
145 | /* timestamps */ | |
146 | int64_t uptime; | |
147 | }; | |
148 | ||
977d71cc | 149 | struct pim_msdp_mg_mbr { |
150 | struct in_addr mbr_ip; | |
151 | struct pim_msdp_peer *mp; | |
152 | }; | |
153 | ||
154 | /* PIM MSDP mesh-group */ | |
155 | struct pim_msdp_mg { | |
156 | char *mesh_group_name; | |
157 | struct in_addr src_ip; | |
158 | uint32_t mbr_cnt; | |
159 | struct list *mbr_list; | |
160 | }; | |
161 | ||
2a333e0f | 162 | enum pim_msdp_flags { |
163 | PIM_MSDPF_NONE = 0, | |
3c72d654 | 164 | PIM_MSDPF_ENABLE = (1 << 0), |
165 | PIM_MSDPF_LISTENER = (1 << 1) | |
2a333e0f | 166 | }; |
167 | ||
168 | struct pim_msdp_listener { | |
169 | int fd; | |
170 | union sockunion su; | |
171 | struct thread *thread; | |
172 | }; | |
11128587 | 173 | |
2a333e0f | 174 | struct pim_msdp { |
175 | enum pim_msdp_flags flags; | |
2a333e0f | 176 | struct thread_master *master; |
3c72d654 | 177 | struct pim_msdp_listener listener; |
2a333e0f | 178 | uint32_t rejected_accepts; |
3c72d654 | 179 | |
180 | /* MSDP peer info */ | |
181 | struct hash *peer_hash; | |
182 | struct list *peer_list; | |
183 | ||
184 | /* MSDP active-source info */ | |
185 | #define PIM_MSDP_SA_ADVERTISMENT_TIME 60 | |
186 | struct thread *sa_adv_timer; // 5.6 | |
187 | struct hash *sa_hash; | |
188 | struct list *sa_list; | |
189 | uint32_t local_cnt; | |
190 | ||
191 | /* keep a scratch pad for building SA TLVs */ | |
192 | struct stream *work_obuf; | |
193 | ||
194 | struct in_addr originator_id; | |
977d71cc | 195 | |
196 | /* currently only one mesh-group is supported - so just stash it here */ | |
197 | struct pim_msdp_mg *mg; | |
11128587 DS |
198 | }; |
199 | ||
2a333e0f | 200 | #define PIM_MSDP_PEER_READ_ON(mp) THREAD_READ_ON(msdp->master, mp->t_read, pim_msdp_read, mp, mp->fd); |
201 | #define PIM_MSDP_PEER_WRITE_ON(mp) THREAD_WRITE_ON(msdp->master, mp->t_write, pim_msdp_write, mp, mp->fd); | |
202 | ||
203 | #define PIM_MSDP_PEER_READ_OFF(mp) THREAD_READ_OFF(mp->t_read) | |
204 | #define PIM_MSDP_PEER_WRITE_OFF(mp) THREAD_WRITE_OFF(mp->t_write) | |
205 | ||
206 | extern struct pim_msdp *msdp; | |
207 | void pim_msdp_init(struct thread_master *master); | |
208 | void pim_msdp_exit(void); | |
977d71cc | 209 | enum pim_msdp_err pim_msdp_peer_add(struct in_addr peer, struct in_addr local, const char *mesh_group_name, struct pim_msdp_peer **mp_p); |
2a333e0f | 210 | enum pim_msdp_err pim_msdp_peer_del(struct in_addr peer_addr); |
211 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, int buf_size); | |
212 | struct pim_msdp_peer *pim_msdp_peer_find(struct in_addr peer_addr); | |
213 | void pim_msdp_peer_established(struct pim_msdp_peer *mp); | |
214 | void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer *mp); | |
215 | void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state); | |
216 | void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str); | |
217 | int pim_msdp_write(struct thread *thread); | |
218 | char *pim_msdp_peer_key_dump(struct pim_msdp_peer *mp, char *buf, int buf_size, bool long_format); | |
3c72d654 | 219 | int pim_msdp_config_write(struct vty *vty); |
220 | void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp); | |
3c72d654 | 221 | void pim_msdp_sa_ref(struct pim_msdp_peer *mp, struct prefix_sg *sg, struct in_addr rp); |
1bf16443 | 222 | void pim_msdp_sa_local_update(struct pim_upstream *up); |
3c72d654 | 223 | void pim_msdp_sa_local_del(struct prefix_sg *sg); |
224 | void pim_msdp_i_am_rp_changed(void); | |
225 | bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp); | |
7667c556 | 226 | void pim_msdp_up_join_state_changed(struct pim_upstream *xg_up); |
36e466fe | 227 | void pim_msdp_up_del(struct prefix_sg *sg); |
977d71cc | 228 | enum pim_msdp_err pim_msdp_mg_mbr_add(const char *mesh_group_name, struct in_addr mbr_ip); |
229 | enum pim_msdp_err pim_msdp_mg_mbr_del(const char *mesh_group_name, struct in_addr mbr_ip); | |
230 | enum pim_msdp_err pim_msdp_mg_src_del(const char *mesh_group_name); | |
231 | enum pim_msdp_err pim_msdp_mg_src_add(const char *mesh_group_name, struct in_addr src_ip); | |
232 | enum pim_msdp_err pim_msdp_mg_del(const char *mesh_group_name); | |
11128587 | 233 | #endif |