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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2012 Inktank | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "common/pick_address.h" | |
7c673cae FG |
16 | #include "include/ipaddr.h" |
17 | #include "include/str_list.h" | |
18 | #include "common/debug.h" | |
19 | #include "common/errno.h" | |
20 | ||
31f18b77 FG |
21 | #include <netdb.h> |
22 | ||
7c673cae FG |
23 | #define dout_subsys ceph_subsys_ |
24 | ||
3efd9988 FG |
25 | const struct sockaddr *find_ip_in_subnet_list( |
26 | CephContext *cct, | |
27 | const struct ifaddrs *ifa, | |
28 | const std::string &networks, | |
29 | const std::string &interfaces) | |
7c673cae FG |
30 | { |
31 | std::list<string> nets; | |
32 | get_str_list(networks, nets); | |
3efd9988 FG |
33 | std::list<string> ifs; |
34 | get_str_list(interfaces, ifs); | |
35 | ||
36 | // filter interfaces by name | |
37 | const struct ifaddrs *filtered = 0; | |
38 | if (ifs.empty()) { | |
39 | filtered = ifa; | |
40 | } else { | |
41 | if (nets.empty()) { | |
42 | lderr(cct) << "interface names specified but not network names" << dendl; | |
43 | exit(1); | |
44 | } | |
45 | const struct ifaddrs *t = ifa; | |
46 | struct ifaddrs *head = 0; | |
47 | while (t != NULL) { | |
48 | bool match = false; | |
49 | for (auto& i : ifs) { | |
50 | if (strcmp(i.c_str(), t->ifa_name) == 0) { | |
51 | match = true; | |
52 | break; | |
53 | } | |
54 | } | |
55 | if (match) { | |
56 | struct ifaddrs *n = new ifaddrs; | |
57 | memcpy(n, t, sizeof(*t)); | |
58 | n->ifa_next = head; | |
59 | head = n; | |
60 | } | |
61 | t = t->ifa_next; | |
62 | } | |
63 | if (head == NULL) { | |
64 | lderr(cct) << "no interfaces matching " << ifs << dendl; | |
65 | exit(1); | |
66 | } | |
67 | filtered = head; | |
68 | } | |
7c673cae | 69 | |
3efd9988 FG |
70 | struct sockaddr *r = NULL; |
71 | for (std::list<string>::iterator s = nets.begin(); s != nets.end(); ++s) { | |
72 | struct sockaddr_storage net; | |
73 | unsigned int prefix_len; | |
7c673cae | 74 | |
3efd9988 FG |
75 | if (!parse_network(s->c_str(), &net, &prefix_len)) { |
76 | lderr(cct) << "unable to parse network: " << *s << dendl; | |
77 | exit(1); | |
78 | } | |
79 | ||
80 | const struct ifaddrs *found = find_ip_in_subnet( | |
81 | filtered, | |
82 | (struct sockaddr *) &net, prefix_len); | |
83 | if (found) { | |
84 | r = found->ifa_addr; | |
85 | break; | |
86 | } | |
87 | } | |
7c673cae | 88 | |
3efd9988 FG |
89 | if (filtered != ifa) { |
90 | while (filtered) { | |
91 | struct ifaddrs *t = filtered->ifa_next; | |
92 | delete filtered; | |
93 | filtered = t; | |
7c673cae | 94 | } |
3efd9988 | 95 | } |
7c673cae | 96 | |
3efd9988 | 97 | return r; |
7c673cae FG |
98 | } |
99 | ||
100 | // observe this change | |
101 | struct Observer : public md_config_obs_t { | |
102 | const char *keys[2]; | |
103 | explicit Observer(const char *c) { | |
104 | keys[0] = c; | |
105 | keys[1] = NULL; | |
106 | } | |
107 | ||
108 | const char** get_tracked_conf_keys() const override { | |
109 | return (const char **)keys; | |
110 | } | |
111 | void handle_conf_change(const struct md_config_t *conf, | |
112 | const std::set <std::string> &changed) override { | |
113 | // do nothing. | |
114 | } | |
115 | }; | |
116 | ||
117 | static void fill_in_one_address(CephContext *cct, | |
118 | const struct ifaddrs *ifa, | |
119 | const string networks, | |
3efd9988 | 120 | const string interfaces, |
7c673cae FG |
121 | const char *conf_var) |
122 | { | |
3efd9988 FG |
123 | const struct sockaddr *found = find_ip_in_subnet_list(cct, ifa, networks, |
124 | interfaces); | |
7c673cae | 125 | if (!found) { |
3efd9988 FG |
126 | lderr(cct) << "unable to find any IP address in networks '" << networks |
127 | << "' interfaces '" << interfaces << "'" << dendl; | |
7c673cae FG |
128 | exit(1); |
129 | } | |
130 | ||
131 | char buf[INET6_ADDRSTRLEN]; | |
132 | int err; | |
133 | ||
134 | err = getnameinfo(found, | |
135 | (found->sa_family == AF_INET) | |
136 | ? sizeof(struct sockaddr_in) | |
137 | : sizeof(struct sockaddr_in6), | |
138 | ||
139 | buf, sizeof(buf), | |
140 | NULL, 0, | |
141 | NI_NUMERICHOST); | |
142 | if (err != 0) { | |
143 | lderr(cct) << "unable to convert chosen address to string: " << gai_strerror(err) << dendl; | |
144 | exit(1); | |
145 | } | |
146 | ||
147 | Observer obs(conf_var); | |
148 | ||
149 | cct->_conf->add_observer(&obs); | |
150 | ||
151 | cct->_conf->set_val_or_die(conf_var, buf); | |
152 | cct->_conf->apply_changes(NULL); | |
153 | ||
154 | cct->_conf->remove_observer(&obs); | |
155 | } | |
156 | ||
157 | void pick_addresses(CephContext *cct, int needs) | |
158 | { | |
159 | struct ifaddrs *ifa; | |
160 | int r = getifaddrs(&ifa); | |
161 | if (r<0) { | |
162 | string err = cpp_strerror(errno); | |
163 | lderr(cct) << "unable to fetch interfaces and addresses: " << err << dendl; | |
164 | exit(1); | |
165 | } | |
166 | ||
7c673cae FG |
167 | if ((needs & CEPH_PICK_ADDRESS_PUBLIC) |
168 | && cct->_conf->public_addr.is_blank_ip() | |
169 | && !cct->_conf->public_network.empty()) { | |
3efd9988 FG |
170 | fill_in_one_address(cct, ifa, cct->_conf->public_network, |
171 | cct->_conf->get_val<string>("public_network_interface"), | |
172 | "public_addr"); | |
7c673cae FG |
173 | } |
174 | ||
175 | if ((needs & CEPH_PICK_ADDRESS_CLUSTER) | |
176 | && cct->_conf->cluster_addr.is_blank_ip()) { | |
177 | if (!cct->_conf->cluster_network.empty()) { | |
3efd9988 FG |
178 | fill_in_one_address( |
179 | cct, ifa, cct->_conf->cluster_network, | |
180 | cct->_conf->get_val<string>("cluster_network_interface"), | |
181 | "cluster_addr"); | |
7c673cae FG |
182 | } else { |
183 | if (!cct->_conf->public_network.empty()) { | |
184 | lderr(cct) << "Public network was set, but cluster network was not set " << dendl; | |
185 | lderr(cct) << " Using public network also for cluster network" << dendl; | |
3efd9988 FG |
186 | fill_in_one_address( |
187 | cct, ifa, cct->_conf->public_network, | |
188 | cct->_conf->get_val<string>("public_network_interface"), | |
189 | "cluster_addr"); | |
7c673cae FG |
190 | } |
191 | } | |
192 | } | |
193 | ||
194 | freeifaddrs(ifa); | |
195 | } | |
196 | ||
b5b8bbf5 FG |
197 | |
198 | std::string pick_iface(CephContext *cct, const struct sockaddr_storage &network) | |
199 | { | |
200 | struct ifaddrs *ifa; | |
201 | int r = getifaddrs(&ifa); | |
202 | if (r < 0) { | |
203 | string err = cpp_strerror(errno); | |
204 | lderr(cct) << "unable to fetch interfaces and addresses: " << err << dendl; | |
205 | return {}; | |
206 | } | |
207 | ||
208 | unsigned int prefix_len = 0; | |
209 | const struct ifaddrs *found = find_ip_in_subnet(ifa, | |
210 | (const struct sockaddr *) &network, prefix_len); | |
211 | ||
212 | std::string result; | |
213 | if (found) { | |
214 | result = found->ifa_name; | |
215 | } | |
216 | ||
217 | freeifaddrs(ifa); | |
218 | ||
219 | return result; | |
220 | } | |
221 | ||
222 | ||
7c673cae FG |
223 | bool have_local_addr(CephContext *cct, const list<entity_addr_t>& ls, entity_addr_t *match) |
224 | { | |
225 | struct ifaddrs *ifa; | |
226 | int r = getifaddrs(&ifa); | |
227 | if (r < 0) { | |
228 | lderr(cct) << "unable to fetch interfaces and addresses: " << cpp_strerror(errno) << dendl; | |
229 | exit(1); | |
230 | } | |
231 | ||
232 | bool found = false; | |
233 | for (struct ifaddrs *addrs = ifa; addrs != NULL; addrs = addrs->ifa_next) { | |
234 | if (addrs->ifa_addr) { | |
235 | entity_addr_t a; | |
236 | a.set_sockaddr(addrs->ifa_addr); | |
237 | for (list<entity_addr_t>::const_iterator p = ls.begin(); p != ls.end(); ++p) { | |
238 | if (a.is_same_host(*p)) { | |
239 | *match = *p; | |
240 | found = true; | |
241 | goto out; | |
242 | } | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
247 | out: | |
248 | freeifaddrs(ifa); | |
249 | return found; | |
250 | } |