1 //===-- SocketAddress.cpp ---------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #if defined(_MSC_VER)
11 #define _WINSOCK_DEPRECATED_NO_WARNINGS
12 #endif
13 
14 #include "lldb/Host/SocketAddress.h"
15 #include <stddef.h>
16 #include <stdio.h>
17 
18 // C Includes
19 #if !defined(_WIN32)
20 #include <arpa/inet.h>
21 #endif
22 
23 #include <assert.h>
24 #include <string.h>
25 
26 // C++ Includes
27 // Other libraries and framework includes
28 // Project includes
29 #include "lldb/Host/PosixApi.h"
30 
31 // WindowsXP needs an inet_ntop implementation
32 #ifdef _WIN32
33 
34 #ifndef INET6_ADDRSTRLEN // might not be defined in older Windows SDKs
35 #define INET6_ADDRSTRLEN 46
36 #endif
37 
38 // TODO: implement shortened form "::" for runs of zeros
39 const char *inet_ntop(int af, const void *src, char *dst, socklen_t size) {
40   if (size == 0) {
41     return nullptr;
42   }
43 
44   switch (af) {
45   case AF_INET: {
46     {
47       const char *formatted = inet_ntoa(*static_cast<const in_addr *>(src));
48       if (formatted && strlen(formatted) < static_cast<size_t>(size)) {
49         return ::strcpy(dst, formatted);
50       }
51     }
52     return nullptr;
53   case AF_INET6: {
54     char tmp[INET6_ADDRSTRLEN] = {0};
55     const uint16_t *src16 = static_cast<const uint16_t *>(src);
56     int full_size = ::snprintf(
57         tmp, sizeof(tmp), "%x:%x:%x:%x:%x:%x:%x:%x", ntohs(src16[0]),
58         ntohs(src16[1]), ntohs(src16[2]), ntohs(src16[3]), ntohs(src16[4]),
59         ntohs(src16[5]), ntohs(src16[6]), ntohs(src16[7]));
60     if (full_size < static_cast<int>(size)) {
61       return ::strcpy(dst, tmp);
62     }
63     return nullptr;
64   }
65   }
66   }
67   return nullptr;
68 }
69 #endif
70 
71 using namespace lldb_private;
72 
73 //----------------------------------------------------------------------
74 // SocketAddress constructor
75 //----------------------------------------------------------------------
76 SocketAddress::SocketAddress() { Clear(); }
77 
78 SocketAddress::SocketAddress(const struct sockaddr &s) { m_socket_addr.sa = s; }
79 
80 SocketAddress::SocketAddress(const struct sockaddr_in &s) {
81   m_socket_addr.sa_ipv4 = s;
82 }
83 
84 SocketAddress::SocketAddress(const struct sockaddr_in6 &s) {
85   m_socket_addr.sa_ipv6 = s;
86 }
87 
88 SocketAddress::SocketAddress(const struct sockaddr_storage &s) {
89   m_socket_addr.sa_storage = s;
90 }
91 
92 SocketAddress::SocketAddress(const struct addrinfo *addr_info) {
93   *this = addr_info;
94 }
95 
96 //----------------------------------------------------------------------
97 // SocketAddress copy constructor
98 //----------------------------------------------------------------------
99 SocketAddress::SocketAddress(const SocketAddress &rhs)
100     : m_socket_addr(rhs.m_socket_addr) {}
101 
102 //----------------------------------------------------------------------
103 // Destructor
104 //----------------------------------------------------------------------
105 SocketAddress::~SocketAddress() {}
106 
107 void SocketAddress::Clear() {
108   memset(&m_socket_addr, 0, sizeof(m_socket_addr));
109 }
110 
111 bool SocketAddress::IsValid() const { return GetLength() != 0; }
112 
113 static socklen_t GetFamilyLength(sa_family_t family) {
114   switch (family) {
115   case AF_INET:
116     return sizeof(struct sockaddr_in);
117   case AF_INET6:
118     return sizeof(struct sockaddr_in6);
119   }
120   assert(0 && "Unsupported address family");
121   return 0;
122 }
123 
124 socklen_t SocketAddress::GetLength() const {
125 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
126   return m_socket_addr.sa.sa_len;
127 #else
128   return GetFamilyLength(GetFamily());
129 #endif
130 }
131 
132 socklen_t SocketAddress::GetMaxLength() { return sizeof(sockaddr_t); }
133 
134 sa_family_t SocketAddress::GetFamily() const {
135   return m_socket_addr.sa.sa_family;
136 }
137 
138 void SocketAddress::SetFamily(sa_family_t family) {
139   m_socket_addr.sa.sa_family = family;
140 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
141   m_socket_addr.sa.sa_len = GetFamilyLength(family);
142 #endif
143 }
144 
145 std::string SocketAddress::GetIPAddress() const {
146   char str[INET6_ADDRSTRLEN] = {0};
147   switch (GetFamily()) {
148   case AF_INET:
149     if (inet_ntop(GetFamily(), &m_socket_addr.sa_ipv4.sin_addr, str,
150                   sizeof(str)))
151       return str;
152     break;
153   case AF_INET6:
154     if (inet_ntop(GetFamily(), &m_socket_addr.sa_ipv6.sin6_addr, str,
155                   sizeof(str)))
156       return str;
157     break;
158   }
159   return "";
160 }
161 
162 uint16_t SocketAddress::GetPort() const {
163   switch (GetFamily()) {
164   case AF_INET:
165     return ntohs(m_socket_addr.sa_ipv4.sin_port);
166   case AF_INET6:
167     return ntohs(m_socket_addr.sa_ipv6.sin6_port);
168   }
169   return 0;
170 }
171 
172 bool SocketAddress::SetPort(uint16_t port) {
173   switch (GetFamily()) {
174   case AF_INET:
175     m_socket_addr.sa_ipv4.sin_port = htons(port);
176     return true;
177 
178   case AF_INET6:
179     m_socket_addr.sa_ipv6.sin6_port = htons(port);
180     return true;
181   }
182   return false;
183 }
184 
185 //----------------------------------------------------------------------
186 // SocketAddress assignment operator
187 //----------------------------------------------------------------------
188 const SocketAddress &SocketAddress::operator=(const SocketAddress &rhs) {
189   if (this != &rhs)
190     m_socket_addr = rhs.m_socket_addr;
191   return *this;
192 }
193 
194 const SocketAddress &SocketAddress::
195 operator=(const struct addrinfo *addr_info) {
196   Clear();
197   if (addr_info && addr_info->ai_addr && addr_info->ai_addrlen > 0 &&
198       addr_info->ai_addrlen <= sizeof m_socket_addr) {
199     ::memcpy(&m_socket_addr, addr_info->ai_addr, addr_info->ai_addrlen);
200   }
201   return *this;
202 }
203 
204 const SocketAddress &SocketAddress::operator=(const struct sockaddr &s) {
205   m_socket_addr.sa = s;
206   return *this;
207 }
208 
209 const SocketAddress &SocketAddress::operator=(const struct sockaddr_in &s) {
210   m_socket_addr.sa_ipv4 = s;
211   return *this;
212 }
213 
214 const SocketAddress &SocketAddress::operator=(const struct sockaddr_in6 &s) {
215   m_socket_addr.sa_ipv6 = s;
216   return *this;
217 }
218 
219 const SocketAddress &SocketAddress::
220 operator=(const struct sockaddr_storage &s) {
221   m_socket_addr.sa_storage = s;
222   return *this;
223 }
224 
225 bool SocketAddress::getaddrinfo(const char *host, const char *service,
226                                 int ai_family, int ai_socktype, int ai_protocol,
227                                 int ai_flags) {
228   Clear();
229 
230   auto addresses = GetAddressInfo(host, service, ai_family, ai_socktype,
231                                   ai_protocol, ai_flags);
232   if (!addresses.empty())
233     *this = addresses[0];
234   return IsValid();
235 }
236 
237 std::vector<SocketAddress>
238 SocketAddress::GetAddressInfo(const char *hostname, const char *servname,
239                               int ai_family, int ai_socktype, int ai_protocol,
240                               int ai_flags) {
241   std::vector<SocketAddress> addr_list;
242 
243   struct addrinfo hints;
244   memset(&hints, 0, sizeof(hints));
245   hints.ai_family = ai_family;
246   hints.ai_socktype = ai_socktype;
247   hints.ai_protocol = ai_protocol;
248   hints.ai_flags = ai_flags;
249 
250   struct addrinfo *service_info_list = NULL;
251   int err = ::getaddrinfo(hostname, servname, &hints, &service_info_list);
252   if (err == 0 && service_info_list) {
253     for (struct addrinfo *service_ptr = service_info_list; service_ptr != NULL;
254          service_ptr = service_ptr->ai_next) {
255       addr_list.emplace_back(SocketAddress(service_ptr));
256     }
257   }
258 
259   if (service_info_list)
260     ::freeaddrinfo(service_info_list);
261   return addr_list;
262 }
263 
264 bool SocketAddress::SetToLocalhost(sa_family_t family, uint16_t port) {
265   switch (family) {
266   case AF_INET:
267     SetFamily(AF_INET);
268     if (SetPort(port)) {
269       m_socket_addr.sa_ipv4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
270       return true;
271     }
272     break;
273 
274   case AF_INET6:
275     SetFamily(AF_INET6);
276     if (SetPort(port)) {
277       m_socket_addr.sa_ipv6.sin6_addr = in6addr_loopback;
278       return true;
279     }
280     break;
281   }
282   Clear();
283   return false;
284 }
285 
286 bool SocketAddress::SetToAnyAddress(sa_family_t family, uint16_t port) {
287   switch (family) {
288   case AF_INET:
289     SetFamily(AF_INET);
290     if (SetPort(port)) {
291       m_socket_addr.sa_ipv4.sin_addr.s_addr = htonl(INADDR_ANY);
292       return true;
293     }
294     break;
295 
296   case AF_INET6:
297     SetFamily(AF_INET6);
298     if (SetPort(port)) {
299       m_socket_addr.sa_ipv6.sin6_addr = in6addr_any;
300       return true;
301     }
302     break;
303   }
304   Clear();
305   return false;
306 }
307 
308 bool SocketAddress::IsAnyAddr() const {
309   return (GetFamily() == AF_INET)
310              ? m_socket_addr.sa_ipv4.sin_addr.s_addr == htonl(INADDR_ANY)
311              : 0 == memcmp(&m_socket_addr.sa_ipv6.sin6_addr, &in6addr_any, 16);
312 }
313 
314 bool SocketAddress::operator==(const SocketAddress &rhs) const {
315   if (GetFamily() != rhs.GetFamily())
316     return false;
317   if (GetLength() != rhs.GetLength())
318     return false;
319   switch (GetFamily()) {
320   case AF_INET:
321     return m_socket_addr.sa_ipv4.sin_addr.s_addr ==
322            rhs.m_socket_addr.sa_ipv4.sin_addr.s_addr;
323   case AF_INET6:
324     return 0 == memcmp(&m_socket_addr.sa_ipv6.sin6_addr,
325                        &rhs.m_socket_addr.sa_ipv6.sin6_addr, 16);
326   }
327   return false;
328 }
329 
330 bool SocketAddress::operator!=(const SocketAddress &rhs) const {
331   return !(*this == rhs);
332 }
333