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-rw-r--r--luni/src/main/native/ifaddrs-android.h186
1 files changed, 7 insertions, 179 deletions
diff --git a/luni/src/main/native/ifaddrs-android.h b/luni/src/main/native/ifaddrs-android.h
index 446d8d2..c89d08a 100644
--- a/luni/src/main/native/ifaddrs-android.h
+++ b/luni/src/main/native/ifaddrs-android.h
@@ -17,25 +17,11 @@
#ifndef IFADDRS_ANDROID_H_included
#define IFADDRS_ANDROID_H_included
-#include <arpa/inet.h>
-#include <cstring>
-#include <errno.h>
-#include <net/if.h>
-#include <netinet/in.h>
-#include <new>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <stdio.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-
-#include "LocalArray.h"
-#include "ScopedFd.h"
+struct sockaddr;
// Android (bionic) doesn't have getifaddrs(3)/freeifaddrs(3).
-// We fake it here, so java_net_NetworkInterface.cpp can use that API
-// with all the non-portable code being in this file.
+// We fake it here, so java_net_NetworkInterface.cpp can use that API.
+// This code should move into bionic, though.
// Source-compatible subset of the BSD struct.
struct ifaddrs {
@@ -54,88 +40,9 @@ struct ifaddrs {
// Interface netmask.
sockaddr* ifa_netmask;
- ifaddrs(ifaddrs* next)
- : ifa_next(next), ifa_name(NULL), ifa_flags(0), ifa_addr(NULL), ifa_netmask(NULL)
- {
- }
-
- ~ifaddrs() {
- delete ifa_next;
- delete[] ifa_name;
- delete ifa_addr;
- delete ifa_netmask;
- }
-
- // Sadly, we can't keep the interface index for portability with BSD.
- // We'll have to keep the name instead, and re-query the index when
- // we need it later.
- bool setNameAndFlagsByIndex(int interfaceIndex) {
- // Get the name.
- char buf[IFNAMSIZ];
- char* name = if_indextoname(interfaceIndex, buf);
- if (name == NULL) {
- return false;
- }
- ifa_name = new char[strlen(name) + 1];
- strcpy(ifa_name, name);
-
- // Get the flags.
- ScopedFd fd(socket(AF_INET, SOCK_DGRAM, 0));
- if (fd.get() == -1) {
- return false;
- }
- ifreq ifr;
- memset(&ifr, 0, sizeof(ifr));
- strcpy(ifr.ifr_name, name);
- int rc = ioctl(fd.get(), SIOCGIFFLAGS, &ifr);
- if (rc == -1) {
- return false;
- }
- ifa_flags = ifr.ifr_flags;
- return true;
- }
+ ifaddrs(ifaddrs* next, sockaddr* ifa_addr, sockaddr* ifa_netmask);
- // Netlink gives us the address family in the header, and the
- // sockaddr_in or sockaddr_in6 bytes as the payload. We need to
- // stitch the two bits together into the sockaddr that's part of
- // our portable interface.
- void setAddress(int family, void* data, size_t byteCount) {
- // Set the address proper...
- sockaddr_storage* ss = new sockaddr_storage;
- memset(ss, 0, sizeof(*ss));
- ifa_addr = reinterpret_cast<sockaddr*>(ss);
- ss->ss_family = family;
- uint8_t* dst = sockaddrBytes(family, ss);
- memcpy(dst, data, byteCount);
- }
-
- // Netlink gives us the prefix length as a bit count. We need to turn
- // that into a BSD-compatible netmask represented by a sockaddr*.
- void setNetmask(int family, size_t prefixLength) {
- // ...and work out the netmask from the prefix length.
- sockaddr_storage* ss = new sockaddr_storage;
- memset(ss, 0, sizeof(*ss));
- ifa_netmask = reinterpret_cast<sockaddr*>(ss);
- ss->ss_family = family;
- uint8_t* dst = sockaddrBytes(family, ss);
- memset(dst, 0xff, prefixLength / 8);
- if ((prefixLength % 8) != 0) {
- dst[prefixLength/8] = (0xff << (8 - (prefixLength % 8)));
- }
- }
-
- // Returns a pointer to the first byte in the address data (which is
- // stored in network byte order).
- uint8_t* sockaddrBytes(int family, sockaddr_storage* ss) {
- if (family == AF_INET) {
- sockaddr_in* ss4 = reinterpret_cast<sockaddr_in*>(ss);
- return reinterpret_cast<uint8_t*>(&ss4->sin_addr);
- } else if (family == AF_INET6) {
- sockaddr_in6* ss6 = reinterpret_cast<sockaddr_in6*>(ss);
- return reinterpret_cast<uint8_t*>(&ss6->sin6_addr);
- }
- return NULL;
- }
+ ~ifaddrs();
private:
// Disallow copy and assignment.
@@ -143,86 +50,7 @@ private:
void operator=(const ifaddrs&);
};
-// FIXME: use iovec instead.
-struct addrReq_struct {
- nlmsghdr netlinkHeader;
- ifaddrmsg msg;
-};
-
-inline bool sendNetlinkMessage(int fd, const void* data, size_t byteCount) {
- ssize_t sentByteCount = TEMP_FAILURE_RETRY(send(fd, data, byteCount, 0));
- return (sentByteCount == static_cast<ssize_t>(byteCount));
-}
-
-inline ssize_t recvNetlinkMessage(int fd, char* buf, size_t byteCount) {
- return TEMP_FAILURE_RETRY(recv(fd, buf, byteCount, 0));
-}
-
-// Source-compatible with the BSD function.
-inline int getifaddrs(ifaddrs** result) {
- // Simplify cleanup for callers.
- *result = NULL;
-
- // Create a netlink socket.
- ScopedFd fd(socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE));
- if (fd.get() < 0) {
- return -1;
- }
-
- // Ask for the address information.
- addrReq_struct addrRequest;
- memset(&addrRequest, 0, sizeof(addrRequest));
- addrRequest.netlinkHeader.nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH;
- addrRequest.netlinkHeader.nlmsg_type = RTM_GETADDR;
- addrRequest.netlinkHeader.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(addrRequest)));
- addrRequest.msg.ifa_family = AF_UNSPEC; // All families.
- addrRequest.msg.ifa_index = 0; // All interfaces.
- if (!sendNetlinkMessage(fd.get(), &addrRequest, addrRequest.netlinkHeader.nlmsg_len)) {
- return -1;
- }
-
- // Read the responses.
- LocalArray<0> buf(65536); // We don't necessarily have std::vector.
- ssize_t bytesRead;
- while ((bytesRead = recvNetlinkMessage(fd.get(), &buf[0], buf.size())) > 0) {
- nlmsghdr* hdr = reinterpret_cast<nlmsghdr*>(&buf[0]);
- for (; NLMSG_OK(hdr, (size_t)bytesRead); hdr = NLMSG_NEXT(hdr, bytesRead)) {
- switch (hdr->nlmsg_type) {
- case NLMSG_DONE:
- return 0;
- case NLMSG_ERROR:
- return -1;
- case RTM_NEWADDR:
- {
- ifaddrmsg* address = reinterpret_cast<ifaddrmsg*>(NLMSG_DATA(hdr));
- rtattr* rta = IFA_RTA(address);
- size_t ifaPayloadLength = IFA_PAYLOAD(hdr);
- while (RTA_OK(rta, ifaPayloadLength)) {
- if (rta->rta_type == IFA_LOCAL) {
- int family = address->ifa_family;
- if (family == AF_INET || family == AF_INET6) {
- *result = new ifaddrs(*result);
- if (!(*result)->setNameAndFlagsByIndex(address->ifa_index)) {
- return -1;
- }
- (*result)->setAddress(family, RTA_DATA(rta), RTA_PAYLOAD(rta));
- (*result)->setNetmask(family, address->ifa_prefixlen);
- }
- }
- rta = RTA_NEXT(rta, ifaPayloadLength);
- }
- }
- break;
- }
- }
- }
- // We only get here if recv fails before we see a NLMSG_DONE.
- return -1;
-}
-
-// Source-compatible with the BSD function.
-inline void freeifaddrs(ifaddrs* addresses) {
- delete addresses;
-}
+int getifaddrs(ifaddrs** result);
+void freeifaddrs(ifaddrs* addresses);
#endif // IFADDRS_ANDROID_H_included
generated by cgit v1.1 at 2025-08-21 18:02:37 +0000