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1 | /* | |
2 | * IP MSDP for Quagga | |
3 | * Copyright (C) 2016 Cumulus Networks, Inc. | |
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 along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | #ifndef PIM_MSDP_H | |
20 | #define PIM_MSDP_H | |
21 | ||
22 | enum pim_msdp_peer_state { | |
23 | PIM_MSDP_DISABLED, | |
24 | PIM_MSDP_INACTIVE, | |
25 | PIM_MSDP_LISTEN, | |
26 | PIM_MSDP_CONNECTING, | |
27 | PIM_MSDP_ESTABLISHED | |
28 | }; | |
29 | ||
30 | /* SA and KA TLVs are processed; rest ignored */ | |
31 | enum pim_msdp_tlv { | |
32 | PIM_MSDP_V4_SOURCE_ACTIVE = 1, | |
33 | PIM_MSDP_V4_SOURCE_ACTIVE_REQUEST, | |
34 | PIM_MSDP_V4_SOURCE_ACTIVE_RESPONSE, | |
35 | PIM_MSDP_KEEPALIVE, | |
36 | PIM_MSDP_RESERVED, | |
37 | PIM_MSDP_TRACEROUTE_PROGRESS, | |
38 | PIM_MSDP_TRACEROUTE_REPLY, | |
39 | }; | |
40 | ||
41 | /* MSDP error codes */ | |
42 | enum pim_msdp_err { | |
43 | PIM_MSDP_ERR_NONE = 0, | |
44 | PIM_MSDP_ERR_OOM = -1, | |
45 | PIM_MSDP_ERR_PEER_EXISTS = -2, | |
46 | PIM_MSDP_ERR_MAX_MESH_GROUPS = -3, | |
47 | PIM_MSDP_ERR_NO_PEER = -4, | |
48 | PIM_MSDP_ERR_MG_MBR_EXISTS = -5, | |
49 | PIM_MSDP_ERR_NO_MG = -6, | |
50 | PIM_MSDP_ERR_NO_MG_MBR = -7, | |
51 | PIM_MSDP_ERR_SIP_EQ_DIP = -8, | |
52 | }; | |
53 | ||
54 | #define PIM_MSDP_STATE_STRLEN 16 | |
55 | #define PIM_MSDP_UPTIME_STRLEN 80 | |
56 | #define PIM_MSDP_TIMER_STRLEN 12 | |
57 | #define PIM_MSDP_TCP_PORT 639 | |
58 | #define PIM_MSDP_SOCKET_SNDBUF_SIZE 65536 | |
59 | ||
60 | enum pim_msdp_sa_flags { | |
61 | PIM_MSDP_SAF_NONE = 0, | |
62 | /* There are two cases where we can pickup an active source locally - | |
63 | * 1. We are RP and got a source-register from the FHR | |
64 | * 2. We are RP and FHR and learnt a new directly connected source on a | |
65 | * DR interface */ | |
66 | PIM_MSDP_SAF_LOCAL = (1 << 0), | |
67 | /* We got this in the MSDP SA TLV from a peer (and this passed peer-RPF | |
68 | * checks) */ | |
69 | PIM_MSDP_SAF_PEER = (1 << 1), | |
70 | PIM_MSDP_SAF_REF = (PIM_MSDP_SAF_LOCAL | PIM_MSDP_SAF_PEER), | |
71 | PIM_MSDP_SAF_STALE = (1 << 2), /* local entries can get kicked out on | |
72 | * misc pim events such as RP change */ | |
73 | PIM_MSDP_SAF_UP_DEL_IN_PROG = (1 << 3) | |
74 | }; | |
75 | ||
76 | struct pim_msdp_sa { | |
77 | struct pim_instance *pim; | |
78 | ||
79 | struct prefix_sg sg; | |
80 | char sg_str[PIM_SG_LEN]; | |
81 | struct in_addr rp; /* Last RP address associated with this SA */ | |
82 | struct in_addr peer; /* last peer from who we heard this SA */ | |
83 | enum pim_msdp_sa_flags flags; | |
84 | ||
85 | /* rfc-3618 is missing default value for SA-hold-down-Period. pulled | |
86 | * this number from industry-standards */ | |
87 | #define PIM_MSDP_SA_HOLD_TIME ((3*60)+30) | |
88 | struct thread *sa_state_timer; // 5.6 | |
89 | int64_t uptime; | |
90 | ||
91 | struct pim_upstream *up; | |
92 | }; | |
93 | ||
94 | enum pim_msdp_peer_flags { | |
95 | PIM_MSDP_PEERF_NONE = 0, | |
96 | PIM_MSDP_PEERF_LISTENER = (1 << 0), | |
97 | #define PIM_MSDP_PEER_IS_LISTENER(mp) (mp->flags & PIM_MSDP_PEERF_LISTENER) | |
98 | PIM_MSDP_PEERF_SA_JUST_SENT = (1 << 1) | |
99 | }; | |
100 | ||
101 | struct pim_msdp_peer { | |
102 | struct pim_instance *pim; | |
103 | ||
104 | /* configuration */ | |
105 | struct in_addr local; | |
106 | struct in_addr peer; | |
107 | char *mesh_group_name; | |
108 | char key_str[INET_ADDRSTRLEN]; | |
109 | ||
110 | /* state */ | |
111 | enum pim_msdp_peer_state state; | |
112 | enum pim_msdp_peer_flags flags; | |
113 | ||
114 | /* TCP socket info */ | |
115 | union sockunion su_local; | |
116 | union sockunion su_peer; | |
117 | int fd; | |
118 | ||
119 | /* protocol timers */ | |
120 | #define PIM_MSDP_PEER_HOLD_TIME 75 | |
121 | struct thread *hold_timer; // 5.4 | |
122 | #define PIM_MSDP_PEER_KA_TIME 60 | |
123 | struct thread *ka_timer; // 5.5 | |
124 | #define PIM_MSDP_PEER_CONNECT_RETRY_TIME 30 | |
125 | struct thread *cr_timer; // 5.6 | |
126 | ||
127 | /* packet thread and buffers */ | |
128 | uint32_t packet_size; | |
129 | struct stream *ibuf; | |
130 | struct stream_fifo *obuf; | |
131 | struct thread *t_read; | |
132 | struct thread *t_write; | |
133 | ||
134 | /* stats */ | |
135 | uint32_t conn_attempts; | |
136 | uint32_t est_flaps; | |
137 | uint32_t sa_cnt; /* number of SAs attributed to this peer */ | |
138 | #define PIM_MSDP_PEER_LAST_RESET_STR 20 | |
139 | char last_reset[PIM_MSDP_PEER_LAST_RESET_STR]; | |
140 | ||
141 | /* packet stats */ | |
142 | uint32_t ka_tx_cnt; | |
143 | uint32_t sa_tx_cnt; | |
144 | uint32_t ka_rx_cnt; | |
145 | uint32_t sa_rx_cnt; | |
146 | uint32_t unk_rx_cnt; | |
147 | ||
148 | /* timestamps */ | |
149 | int64_t uptime; | |
150 | }; | |
151 | ||
152 | struct pim_msdp_mg_mbr { | |
153 | struct in_addr mbr_ip; | |
154 | struct pim_msdp_peer *mp; | |
155 | }; | |
156 | ||
157 | /* PIM MSDP mesh-group */ | |
158 | struct pim_msdp_mg { | |
159 | char *mesh_group_name; | |
160 | struct in_addr src_ip; | |
161 | uint32_t mbr_cnt; | |
162 | struct list *mbr_list; | |
163 | }; | |
164 | ||
165 | enum pim_msdp_flags { | |
166 | PIM_MSDPF_NONE = 0, | |
167 | PIM_MSDPF_ENABLE = (1 << 0), | |
168 | PIM_MSDPF_LISTENER = (1 << 1) | |
169 | }; | |
170 | ||
171 | struct pim_msdp_listener { | |
172 | int fd; | |
173 | union sockunion su; | |
174 | struct thread *thread; | |
175 | }; | |
176 | ||
177 | struct pim_msdp { | |
178 | enum pim_msdp_flags flags; | |
179 | struct thread_master *master; | |
180 | struct pim_msdp_listener listener; | |
181 | uint32_t rejected_accepts; | |
182 | ||
183 | /* MSDP peer info */ | |
184 | struct hash *peer_hash; | |
185 | struct list *peer_list; | |
186 | ||
187 | /* MSDP active-source info */ | |
188 | #define PIM_MSDP_SA_ADVERTISMENT_TIME 60 | |
189 | struct thread *sa_adv_timer; // 5.6 | |
190 | struct hash *sa_hash; | |
191 | struct list *sa_list; | |
192 | uint32_t local_cnt; | |
193 | ||
194 | /* keep a scratch pad for building SA TLVs */ | |
195 | struct stream *work_obuf; | |
196 | ||
197 | struct in_addr originator_id; | |
198 | ||
199 | /* currently only one mesh-group is supported - so just stash it here */ | |
200 | struct pim_msdp_mg *mg; | |
201 | }; | |
202 | ||
203 | #define PIM_MSDP_PEER_READ_ON(mp) \ | |
204 | thread_add_read(mp->pim->msdp.master, pim_msdp_read, mp, mp->fd, \ | |
205 | &mp->t_read) | |
206 | ||
207 | #define PIM_MSDP_PEER_WRITE_ON(mp) \ | |
208 | thread_add_write(mp->pim->msdp.master, pim_msdp_write, mp, mp->fd, \ | |
209 | &mp->t_write) | |
210 | ||
211 | #define PIM_MSDP_PEER_READ_OFF(mp) THREAD_READ_OFF(mp->t_read) | |
212 | #define PIM_MSDP_PEER_WRITE_OFF(mp) THREAD_WRITE_OFF(mp->t_write) | |
213 | ||
214 | // struct pim_msdp *msdp; | |
215 | struct pim_instance; | |
216 | void pim_msdp_init(struct pim_instance *pim, struct thread_master *master); | |
217 | void pim_msdp_exit(struct pim_instance *pim); | |
218 | enum pim_msdp_err pim_msdp_peer_add(struct pim_instance *pim, | |
219 | struct in_addr peer, struct in_addr local, | |
220 | const char *mesh_group_name, | |
221 | struct pim_msdp_peer **mp_p); | |
222 | enum pim_msdp_err pim_msdp_peer_del(struct pim_instance *pim, | |
223 | struct in_addr peer_addr); | |
224 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, | |
225 | int buf_size); | |
226 | struct pim_msdp_peer *pim_msdp_peer_find(struct pim_instance *pim, | |
227 | struct in_addr peer_addr); | |
228 | void pim_msdp_peer_established(struct pim_msdp_peer *mp); | |
229 | void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer *mp); | |
230 | void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state); | |
231 | void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str); | |
232 | int pim_msdp_write(struct thread *thread); | |
233 | char *pim_msdp_peer_key_dump(struct pim_msdp_peer *mp, char *buf, int buf_size, | |
234 | bool long_format); | |
235 | int pim_msdp_config_write(struct vty *vty); | |
236 | int pim_msdp_config_write_helper(struct pim_instance *pim, struct vty *vty, | |
237 | const char *spaces); | |
238 | void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp); | |
239 | void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp, | |
240 | struct prefix_sg *sg, struct in_addr rp); | |
241 | void pim_msdp_sa_local_update(struct pim_upstream *up); | |
242 | void pim_msdp_sa_local_del(struct pim_instance *pim, struct prefix_sg *sg); | |
243 | void pim_msdp_i_am_rp_changed(struct pim_instance *pim); | |
244 | bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp); | |
245 | void pim_msdp_up_join_state_changed(struct pim_instance *pim, | |
246 | struct pim_upstream *xg_up); | |
247 | void pim_msdp_up_del(struct pim_instance *pim, struct prefix_sg *sg); | |
248 | enum pim_msdp_err pim_msdp_mg_mbr_add(struct pim_instance *pim, | |
249 | const char *mesh_group_name, | |
250 | struct in_addr mbr_ip); | |
251 | enum pim_msdp_err pim_msdp_mg_mbr_del(struct pim_instance *pim, | |
252 | const char *mesh_group_name, | |
253 | struct in_addr mbr_ip); | |
254 | enum pim_msdp_err pim_msdp_mg_src_del(struct pim_instance *pim, | |
255 | const char *mesh_group_name); | |
256 | enum pim_msdp_err pim_msdp_mg_src_add(struct pim_instance *pim, | |
257 | const char *mesh_group_name, | |
258 | struct in_addr src_ip); | |
259 | enum pim_msdp_err pim_msdp_mg_del(struct pim_instance *pim, | |
260 | const char *mesh_group_name); | |
261 | #endif |