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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 | * | |
896014f4 DL |
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 | |
11128587 DS |
18 | */ |
19 | #ifndef PIM_MSDP_H | |
20 | #define PIM_MSDP_H | |
21 | ||
2a333e0f | 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 | }; | |
11128587 | 29 | |
2a333e0f | 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, | |
977d71cc | 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, | |
2a333e0f | 52 | }; |
53 | ||
54 | #define PIM_MSDP_STATE_STRLEN 16 | |
2a333e0f | 55 | #define PIM_MSDP_UPTIME_STRLEN 80 |
977d71cc | 56 | #define PIM_MSDP_TIMER_STRLEN 12 |
2a333e0f | 57 | #define PIM_MSDP_TCP_PORT 639 |
58 | #define PIM_MSDP_SOCKET_SNDBUF_SIZE 65536 | |
59 | ||
3c72d654 | 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), | |
36e466fe | 71 | PIM_MSDP_SAF_STALE = (1 << 2), /* local entries can get kicked out on |
3c72d654 | 72 | * misc pim events such as RP change */ |
36e466fe | 73 | PIM_MSDP_SAF_UP_DEL_IN_PROG = (1 << 3) |
3c72d654 | 74 | }; |
75 | ||
76 | struct pim_msdp_sa { | |
77 | struct prefix_sg sg; | |
8bfb8b67 | 78 | char sg_str[PIM_SG_LEN]; |
3c72d654 | 79 | struct in_addr rp; /* Last RP address associated with this SA */ |
80 | struct in_addr peer; /* last peer from who we heard this SA */ | |
81 | enum pim_msdp_sa_flags flags; | |
82 | ||
83 | /* rfc-3618 is missing default value for SA-hold-down-Period. pulled | |
84 | * this number from industry-standards */ | |
85 | #define PIM_MSDP_SA_HOLD_TIME ((3*60)+30) | |
86 | struct thread *sa_state_timer; // 5.6 | |
87 | int64_t uptime; | |
7667c556 | 88 | |
89 | struct pim_upstream *up; | |
3c72d654 | 90 | }; |
91 | ||
2a333e0f | 92 | enum pim_msdp_peer_flags { |
93 | PIM_MSDP_PEERF_NONE = 0, | |
3c72d654 | 94 | PIM_MSDP_PEERF_LISTENER = (1 << 0), |
95 | #define PIM_MSDP_PEER_IS_LISTENER(mp) (mp->flags & PIM_MSDP_PEERF_LISTENER) | |
96 | PIM_MSDP_PEERF_SA_JUST_SENT = (1 << 1) | |
2a333e0f | 97 | }; |
98 | ||
99 | struct pim_msdp_peer { | |
100 | /* configuration */ | |
101 | struct in_addr local; | |
102 | struct in_addr peer; | |
103 | char *mesh_group_name; | |
15ad0c71 | 104 | char key_str[INET_ADDRSTRLEN]; |
2a333e0f | 105 | |
106 | /* state */ | |
107 | enum pim_msdp_peer_state state; | |
108 | enum pim_msdp_peer_flags flags; | |
109 | ||
110 | /* TCP socket info */ | |
111 | union sockunion su_local; | |
112 | union sockunion su_peer; | |
113 | int fd; | |
114 | ||
115 | /* protocol timers */ | |
116 | #define PIM_MSDP_PEER_HOLD_TIME 75 | |
117 | struct thread *hold_timer; // 5.4 | |
118 | #define PIM_MSDP_PEER_KA_TIME 60 | |
11128587 | 119 | struct thread *ka_timer; // 5.5 |
2a333e0f | 120 | #define PIM_MSDP_PEER_CONNECT_RETRY_TIME 30 |
121 | struct thread *cr_timer; // 5.6 | |
122 | ||
123 | /* packet thread and buffers */ | |
3c72d654 | 124 | uint32_t packet_size; |
2a333e0f | 125 | struct stream *ibuf; |
126 | struct stream_fifo *obuf; | |
127 | struct thread *t_read; | |
128 | struct thread *t_write; | |
129 | ||
130 | /* stats */ | |
977d71cc | 131 | uint32_t conn_attempts; |
132 | uint32_t est_flaps; | |
15ad0c71 | 133 | uint32_t sa_cnt; /* number of SAs attributed to this peer */ |
977d71cc | 134 | #define PIM_MSDP_PEER_LAST_RESET_STR 20 |
135 | char last_reset[PIM_MSDP_PEER_LAST_RESET_STR]; | |
136 | ||
137 | /* packet stats */ | |
2a333e0f | 138 | uint32_t ka_tx_cnt; |
139 | uint32_t sa_tx_cnt; | |
140 | uint32_t ka_rx_cnt; | |
141 | uint32_t sa_rx_cnt; | |
142 | uint32_t unk_rx_cnt; | |
143 | ||
144 | /* timestamps */ | |
145 | int64_t uptime; | |
146 | }; | |
147 | ||
977d71cc | 148 | struct pim_msdp_mg_mbr { |
149 | struct in_addr mbr_ip; | |
150 | struct pim_msdp_peer *mp; | |
151 | }; | |
152 | ||
153 | /* PIM MSDP mesh-group */ | |
154 | struct pim_msdp_mg { | |
155 | char *mesh_group_name; | |
156 | struct in_addr src_ip; | |
157 | uint32_t mbr_cnt; | |
158 | struct list *mbr_list; | |
159 | }; | |
160 | ||
2a333e0f | 161 | enum pim_msdp_flags { |
162 | PIM_MSDPF_NONE = 0, | |
3c72d654 | 163 | PIM_MSDPF_ENABLE = (1 << 0), |
164 | PIM_MSDPF_LISTENER = (1 << 1) | |
2a333e0f | 165 | }; |
166 | ||
167 | struct pim_msdp_listener { | |
168 | int fd; | |
169 | union sockunion su; | |
170 | struct thread *thread; | |
171 | }; | |
11128587 | 172 | |
2a333e0f | 173 | struct pim_msdp { |
174 | enum pim_msdp_flags flags; | |
2a333e0f | 175 | struct thread_master *master; |
3c72d654 | 176 | struct pim_msdp_listener listener; |
2a333e0f | 177 | uint32_t rejected_accepts; |
3c72d654 | 178 | |
179 | /* MSDP peer info */ | |
180 | struct hash *peer_hash; | |
181 | struct list *peer_list; | |
182 | ||
183 | /* MSDP active-source info */ | |
184 | #define PIM_MSDP_SA_ADVERTISMENT_TIME 60 | |
185 | struct thread *sa_adv_timer; // 5.6 | |
186 | struct hash *sa_hash; | |
187 | struct list *sa_list; | |
188 | uint32_t local_cnt; | |
189 | ||
190 | /* keep a scratch pad for building SA TLVs */ | |
191 | struct stream *work_obuf; | |
192 | ||
193 | struct in_addr originator_id; | |
977d71cc | 194 | |
195 | /* currently only one mesh-group is supported - so just stash it here */ | |
196 | struct pim_msdp_mg *mg; | |
11128587 DS |
197 | }; |
198 | ||
ffa2c898 QY |
199 | #define PIM_MSDP_PEER_READ_ON(mp) \ |
200 | thread_add_read (msdp->master, pim_msdp_read, mp, mp->fd, &mp->t_read) | |
201 | ||
202 | #define PIM_MSDP_PEER_WRITE_ON(mp) \ | |
203 | thread_add_write (msdp->master, pim_msdp_write, mp, mp->fd, &mp->t_write) | |
2a333e0f | 204 | |
205 | #define PIM_MSDP_PEER_READ_OFF(mp) THREAD_READ_OFF(mp->t_read) | |
206 | #define PIM_MSDP_PEER_WRITE_OFF(mp) THREAD_WRITE_OFF(mp->t_write) | |
207 | ||
208 | extern struct pim_msdp *msdp; | |
209 | void pim_msdp_init(struct thread_master *master); | |
210 | void pim_msdp_exit(void); | |
977d71cc | 211 | 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 | 212 | enum pim_msdp_err pim_msdp_peer_del(struct in_addr peer_addr); |
213 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, int buf_size); | |
214 | struct pim_msdp_peer *pim_msdp_peer_find(struct in_addr peer_addr); | |
215 | void pim_msdp_peer_established(struct pim_msdp_peer *mp); | |
216 | void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer *mp); | |
217 | void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state); | |
218 | void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str); | |
219 | int pim_msdp_write(struct thread *thread); | |
220 | char *pim_msdp_peer_key_dump(struct pim_msdp_peer *mp, char *buf, int buf_size, bool long_format); | |
3c72d654 | 221 | int pim_msdp_config_write(struct vty *vty); |
222 | void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp); | |
3c72d654 | 223 | void pim_msdp_sa_ref(struct pim_msdp_peer *mp, struct prefix_sg *sg, struct in_addr rp); |
1bf16443 | 224 | void pim_msdp_sa_local_update(struct pim_upstream *up); |
3c72d654 | 225 | void pim_msdp_sa_local_del(struct prefix_sg *sg); |
226 | void pim_msdp_i_am_rp_changed(void); | |
227 | bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp); | |
7667c556 | 228 | void pim_msdp_up_join_state_changed(struct pim_upstream *xg_up); |
36e466fe | 229 | void pim_msdp_up_del(struct prefix_sg *sg); |
977d71cc | 230 | enum pim_msdp_err pim_msdp_mg_mbr_add(const char *mesh_group_name, struct in_addr mbr_ip); |
231 | enum pim_msdp_err pim_msdp_mg_mbr_del(const char *mesh_group_name, struct in_addr mbr_ip); | |
232 | enum pim_msdp_err pim_msdp_mg_src_del(const char *mesh_group_name); | |
233 | enum pim_msdp_err pim_msdp_mg_src_add(const char *mesh_group_name, struct in_addr src_ip); | |
234 | enum pim_msdp_err pim_msdp_mg_del(const char *mesh_group_name); | |
11128587 | 235 | #endif |