1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "qpid/Url.h"
#include "qpid/Exception.h"
#include "qpid/Msg.h"
#include <limits.h> // NB: must be before boost/spirit headers.
#include <boost/spirit.hpp>
#include <boost/spirit/actor.hpp>
#include <sstream>
#include <sys/ioctl.h>
#include <net/if.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <errno.h>
using namespace boost::spirit;
using namespace std;
namespace qpid {
std::ostream& operator<<(std::ostream& os, const TcpAddress& a) {
return os << "tcp:" << a.host << ":" << a.port;
}
std::istream& operator>>(std::istream&, const TcpAddress&);
Url Url::getHostNameUrl(uint16_t port) {
char name[HOST_NAME_MAX];
if (::gethostname(name, sizeof(name)) != 0)
throw InvalidUrl(QPID_MSG("Cannot get host name: " << qpid::sys::strError(errno)));
return Url(TcpAddress(name, port));
}
static const string LOCALHOST("127.0.0.1");
Url Url::getIpAddressesUrl(uint16_t port) {
Url url;
int s = socket (PF_INET, SOCK_STREAM, 0);
for (int i=1;;i++) {
struct ifreq ifr;
ifr.ifr_ifindex = i;
if (::ioctl (s, SIOCGIFNAME, &ifr) < 0)
break;
/* now ifr.ifr_name is set */
if (::ioctl (s, SIOCGIFADDR, &ifr) < 0)
continue;
struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
string addr(inet_ntoa(sin->sin_addr));
if (addr != LOCALHOST)
url.push_back(TcpAddress(addr, port));
}
close (s);
return url;
}
string Url::str() const {
if (cache.empty() && !this->empty()) {
ostringstream os;
os << *this;
cache = os.str();
}
return cache;
}
ostream& operator<<(ostream& os, const Url& url) {
Url::const_iterator i = url.begin();
os << "amqp:";
if (i!=url.end()) {
os << *i++;
while (i != url.end())
os << "," << *i++;
}
return os;
}
// Addition to boost::spirit parsers: accept any character from a
// string. Vastly more compile-time-efficient than long rules of the
// form: ch_p('x') | ch_p('y') |...
//
struct ch_in : public char_parser<ch_in> {
ch_in(const string& chars_) : chars(chars_) {}
bool test(char ch_) const {
return chars.find(ch_) != string::npos;
}
string chars;
};
inline ch_in ch_in_p(const string& chars) {
return ch_in(chars);
}
/** Grammar for AMQP URLs. */
struct UrlGrammar : public grammar<UrlGrammar>
{
Url& addr;
UrlGrammar(Url& addr_) : addr(addr_) {}
template <class ScannerT>
struct definition {
TcpAddress tcp;
definition(const UrlGrammar& self)
{
first = eps_p[clear_a(self.addr)] >> amqp_url;
amqp_url = str_p("amqp:") >> prot_addr_list >>
!(str_p("/") >> !parameters);
prot_addr_list = prot_addr % ',';
prot_addr = tcp_prot_addr; // Extend for TLS etc.
// TCP addresses
tcp_prot_addr = tcp_id >> tcp_addr[push_back_a(self.addr, tcp)];
tcp_id = !str_p("tcp:");
tcp_addr = !(host[assign_a(tcp.host)] >> !(':' >> port));
// See http://www.apps.ietf.org/rfc/rfc3986.html#sec-A
// for real host grammar. Shortcut:
port = uint_parser<uint16_t>()[assign_a(tcp.port)];
host = *( unreserved | pct_encoded );
unreserved = alnum_p | ch_in_p("-._~");
pct_encoded = "%" >> xdigit_p >> xdigit_p;
parameters = *anychar_p >> end_p; // Ignore, not used yet.
}
const rule<ScannerT>& start() const { return first; }
rule<ScannerT> first, amqp_url, prot_addr_list, prot_addr,
tcp_prot_addr, tcp_id, tcp_addr, host, port,
unreserved, pct_encoded, parameters;
};
};
void Url::parse(const char* url) {
cache.clear();
if (!boost::spirit::parse(url, UrlGrammar(*this)).full)
throw InvalidUrl(string("Invalid AMQP url: ")+url);
}
void Url::parseNoThrow(const char* url) {
cache.clear();
if (!boost::spirit::parse(url, UrlGrammar(*this)).full)
clear();
}
void Url::throwIfEmpty() const {
if (empty())
throw InvalidUrl("URL contains no addresses");
}
std::istream& operator>>(std::istream& is, Url& url) {
std::string s;
is >> s;
url.parse(s);
return is;
}
} // namespace qpid
|
