/*
- * Copyright 2015 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <folly/SocketAddress.h>
+#include <folly/CppAttributes.h>
+#include <folly/Exception.h>
#include <folly/Hash.h>
#include <boost/functional/hash.hpp>
-#include <boost/static_assert.hpp>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sstream>
#include <string>
+#include <system_error>
namespace {
* A structure to free a struct addrinfo when it goes out of scope.
*/
struct ScopedAddrInfo {
- explicit ScopedAddrInfo(struct addrinfo* info) : info(info) {}
+ explicit ScopedAddrInfo(struct addrinfo* addrinfo) : info(addrinfo) {}
~ScopedAddrInfo() {
freeaddrinfo(info);
}
setFromAddrInfo(results.info);
}
-void SocketAddress::setFromPath(const char* path, size_t len) {
+int SocketAddress::getPortFrom(const struct sockaddr* address) {
+ switch (address->sa_family) {
+ case AF_INET:
+ return ntohs(((sockaddr_in*)address)->sin_port);
+
+ case AF_INET6:
+ return ntohs(((sockaddr_in6*)address)->sin6_port);
+
+ default:
+ return -1;
+ }
+}
+
+const char* SocketAddress::getFamilyNameFrom(
+ const struct sockaddr* address,
+ const char* defaultResult) {
+#define GETFAMILYNAMEFROM_IMPL(Family) \
+ case Family: \
+ return #Family
+
+ switch (address->sa_family) {
+ GETFAMILYNAMEFROM_IMPL(AF_INET);
+ GETFAMILYNAMEFROM_IMPL(AF_INET6);
+ GETFAMILYNAMEFROM_IMPL(AF_UNIX);
+ GETFAMILYNAMEFROM_IMPL(AF_UNSPEC);
+
+ default:
+ return defaultResult;
+ }
+
+#undef GETFAMILYNAMEFROM_IMPL
+}
+
+void SocketAddress::setFromPath(StringPiece path) {
+ // Before we touch storage_, check to see if the length is too big.
+ // Note that "storage_.un.addr->sun_path" may not be safe to evaluate here,
+ // but sizeof() just uses its type, and does't evaluate it.
+ if (path.size() > sizeof(storage_.un.addr->sun_path)) {
+ throw std::invalid_argument(
+ "socket path too large to fit into sockaddr_un");
+ }
+
if (!external_) {
storage_.un.init();
external_ = true;
}
- storage_.un.len = offsetof(struct sockaddr_un, sun_path) + len;
- if (len > sizeof(storage_.un.addr->sun_path)) {
- throw std::invalid_argument(
- "socket path too large to fit into sockaddr_un");
- } else if (len == sizeof(storage_.un.addr->sun_path)) {
- // Note that there will be no terminating NUL in this case.
- // We allow this since getsockname() and getpeername() may return
- // Unix socket addresses with paths that fit exactly in sun_path with no
- // terminating NUL.
- memcpy(storage_.un.addr->sun_path, path, len);
- } else {
- memcpy(storage_.un.addr->sun_path, path, len + 1);
+ size_t len = path.size();
+ storage_.un.len = socklen_t(offsetof(struct sockaddr_un, sun_path) + len);
+ memcpy(storage_.un.addr->sun_path, path.data(), len);
+ // If there is room, put a terminating NUL byte in sun_path. In general the
+ // path should be NUL terminated, although getsockname() and getpeername()
+ // may return Unix socket addresses with paths that fit exactly in sun_path
+ // with no terminating NUL.
+ if (len < sizeof(storage_.un.addr->sun_path)) {
+ storage_.un.addr->sun_path[len] = '\0';
}
}
"with length too long for a sockaddr_un");
}
- prepFamilyChange(AF_UNIX);
- memcpy(storage_.un.addr, address, addrlen);
+ if (!external_) {
+ storage_.un.init();
+ }
+ external_ = true;
+ memcpy(storage_.un.addr, address, size_t(addrlen));
updateUnixAddressLength(addrlen);
// Fill the rest with 0s, just for safety
}
std::string SocketAddress::getFullyQualified() const {
- auto family = getFamily();
- if (family != AF_INET && family != AF_INET6) {
+ if (!isFamilyInet()) {
throw std::invalid_argument("Can't get address str for non ip address");
}
return storage_.addr.toFullyQualified();
}
std::string SocketAddress::getAddressStr() const {
- char buf[INET6_ADDRSTRLEN];
- getAddressStr(buf, sizeof(buf));
- return buf;
+ if (!isFamilyInet()) {
+ throw std::invalid_argument("Can't get address str for non ip address");
+ }
+ return storage_.addr.str();
}
-void SocketAddress::getAddressStr(char* buf, size_t buflen) const {
+bool SocketAddress::isFamilyInet() const {
auto family = getFamily();
- if (family != AF_INET && family != AF_INET6) {
- throw std::invalid_argument("Can't get address str for non ip address");
- }
- std::string ret = storage_.addr.str();
- size_t len = std::min(buflen, ret.size());
+ return family == AF_INET || family == AF_INET6;
+}
+
+void SocketAddress::getAddressStr(char* buf, size_t buflen) const {
+ auto ret = getAddressStr();
+ size_t len = std::min(buflen - 1, ret.size());
memcpy(buf, ret.data(), len);
buf[len] = '\0';
}
}
if (storage_.un.addr->sun_path[0] == '\0') {
// abstract namespace
- return std::string(storage_.un.addr->sun_path, storage_.un.pathLength());
+ return std::string(
+ storage_.un.addr->sun_path, size_t(storage_.un.pathLength()));
}
- return std::string(storage_.un.addr->sun_path,
- strnlen(storage_.un.addr->sun_path,
- storage_.un.pathLength()));
+ return std::string(
+ storage_.un.addr->sun_path,
+ strnlen(storage_.un.addr->sun_path, size_t(storage_.un.pathLength())));
}
std::string SocketAddress::describe() const {
return "<abstract unix address>";
}
- return std::string(storage_.un.addr->sun_path,
- strnlen(storage_.un.addr->sun_path,
- storage_.un.pathLength()));
+ return std::string(
+ storage_.un.addr->sun_path,
+ strnlen(storage_.un.addr->sun_path, size_t(storage_.un.pathLength())));
}
switch (getFamily()) {
case AF_UNSPEC:
if (storage_.un.len != other.storage_.un.len) {
return false;
}
- int cmp = memcmp(storage_.un.addr->sun_path,
- other.storage_.un.addr->sun_path,
- storage_.un.pathLength());
+ int cmp = memcmp(
+ storage_.un.addr->sun_path,
+ other.storage_.un.addr->sun_path,
+ size_t(storage_.un.pathLength()));
return cmp == 0;
}
if (other.getFamily() != getFamily()) {
return false;
}
- int mask_length = 128;
+ uint8_t mask_length = 128;
switch (getFamily()) {
case AF_INET:
mask_length = 32;
- // fallthrough
+ FOLLY_FALLTHROUGH;
case AF_INET6:
{
auto prefix = folly::IPAddress::longestCommonPrefix(
if (external_) {
enum { kUnixPathMax = sizeof(storage_.un.addr->sun_path) };
const char *path = storage_.un.addr->sun_path;
- size_t pathLength = storage_.un.pathLength();
+ auto pathLength = storage_.un.pathLength();
// TODO: this probably could be made more efficient
- for (unsigned int n = 0; n < pathLength; ++n) {
- boost::hash_combine(seed, folly::hash::twang_mix64(path[n]));
+ for (off_t n = 0; n < pathLength; ++n) {
+ boost::hash_combine(seed, folly::hash::twang_mix64(uint64_t(path[n])));
}
}
}
void SocketAddress::setFromAddrInfo(const struct addrinfo* info) {
- setFromSockaddr(info->ai_addr, info->ai_addrlen);
+ setFromSockaddr(info->ai_addr, socklen_t(info->ai_addrlen));
}
void SocketAddress::setFromLocalAddr(const struct addrinfo* info) {
// can be mapped into IPv6 space.
for (const struct addrinfo* ai = info; ai != nullptr; ai = ai->ai_next) {
if (ai->ai_family == AF_INET6) {
- setFromSockaddr(ai->ai_addr, ai->ai_addrlen);
+ setFromSockaddr(ai->ai_addr, socklen_t(ai->ai_addrlen));
return;
}
}
// Otherwise, just use the first address in the list.
- setFromSockaddr(info->ai_addr, info->ai_addrlen);
+ setFromSockaddr(info->ai_addr, socklen_t(info->ai_addrlen));
}
-void SocketAddress::setFromSocket(int socket,
- int (*fn)(int, sockaddr*, socklen_t*)) {
+void SocketAddress::setFromSocket(
+ int socket,
+ int (*fn)(int, struct sockaddr*, socklen_t*)) {
// Try to put the address into a local storage buffer.
sockaddr_storage tmp_sock;
socklen_t addrLen = sizeof(tmp_sock);
// abstract namespace. honor the specified length
} else {
// Call strnlen(), just in case the length was overspecified.
- socklen_t maxLength = addrlen - offsetof(struct sockaddr_un, sun_path);
+ size_t maxLength = addrlen - offsetof(struct sockaddr_un, sun_path);
size_t pathLength = strnlen(storage_.un.addr->sun_path, maxLength);
- storage_.un.len = offsetof(struct sockaddr_un, sun_path) + pathLength;
+ storage_.un.len =
+ socklen_t(offsetof(struct sockaddr_un, sun_path) + pathLength);
}
}
//
// Note that this still meets the requirements for a strict weak
// ordering, so we can use this operator<() with standard C++ containers.
- size_t thisPathLength = storage_.un.pathLength();
+ auto thisPathLength = storage_.un.pathLength();
if (thisPathLength == 0) {
return false;
}
- size_t otherPathLength = other.storage_.un.pathLength();
+ auto otherPathLength = other.storage_.un.pathLength();
if (otherPathLength == 0) {
return true;
}
if (thisPathLength != otherPathLength) {
return thisPathLength < otherPathLength;
}
- int cmp = memcmp(storage_.un.addr->sun_path,
- other.storage_.un.addr->sun_path,
- thisPathLength);
+ int cmp = memcmp(
+ storage_.un.addr->sun_path,
+ other.storage_.un.addr->sun_path,
+ size_t(thisPathLength));
return cmp < 0;
}
switch (getFamily()) {
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