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Add support for NLM_F_DUMP request in StructNLMsgHdr

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Test: atest NetworkStaticLibTests:com.android.net.moduletests.util.netlink.StructNlMsgHdrTest
Change-Id: I395560fb1edfb1c806b2ed4c74a7a3081c7b2515
This commit is contained in:
Yang Sun 2023-12-06 19:40:51 +08:00
commit 9ea3be13fc
3 changed files with 46 additions and 4 deletions
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1
staticlibs/device/com/android/net/module/util/netlink/NetlinkMessage.java
View file

@ -142,6 +142,7 @@ public class NetlinkMessage {
return (NetlinkMessage) RtNetlinkAddressMessage.parse(nlmsghdr, byteBuffer);
case NetlinkConstants.RTM_NEWROUTE:
case NetlinkConstants.RTM_DELROUTE:
case NetlinkConstants.RTM_GETROUTE:
return (NetlinkMessage) RtNetlinkRouteMessage.parse(nlmsghdr, byteBuffer);
case NetlinkConstants.RTM_NEWNEIGH:
case NetlinkConstants.RTM_DELNEIGH:

10
staticlibs/device/com/android/net/module/util/netlink/StructNlMsgHdr.java
View file

@ -71,13 +71,17 @@ public class StructNlMsgHdr {
}
sb.append("NLM_F_ECHO");
}
if ((flags & NLM_F_ROOT) != 0) {
if ((flags & NLM_F_DUMP) == NLM_F_DUMP) {
if (sb.length() > 0) {
sb.append("|");
}
sb.append("NLM_F_DUMP");
} else if ((flags & NLM_F_ROOT) != 0) { // NLM_F_DUMP = NLM_F_ROOT | NLM_F_MATCH
if (sb.length() > 0) {
sb.append("|");
}
sb.append("NLM_F_ROOT");
}
if ((flags & NLM_F_MATCH) != 0) {
} else if ((flags & NLM_F_MATCH) != 0) {
if (sb.length() > 0) {
sb.append("|");
}

39
staticlibs/tests/unit/src/com/android/net/module/util/netlink/StructNlMsgHdrTest.java
View file

@ -16,6 +16,7 @@
package com.android.net.module.util.netlink;
import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_DUMP;
import static org.junit.Assert.fail;
import android.system.OsConstants;
@ -48,10 +49,14 @@ public class StructNlMsgHdrTest {
public static final String TEST_NLMSG_PID_STR = "nlmsg_pid{5678}";
private StructNlMsgHdr makeStructNlMsgHdr(short type) {
return makeStructNlMsgHdr(type, TEST_NLMSG_FLAGS);
}
private StructNlMsgHdr makeStructNlMsgHdr(short type, short flags) {
final StructNlMsgHdr struct = new StructNlMsgHdr();
struct.nlmsg_len = TEST_NLMSG_LEN;
struct.nlmsg_type = type;
struct.nlmsg_flags = TEST_NLMSG_FLAGS;
struct.nlmsg_flags = flags;
struct.nlmsg_seq = TEST_NLMSG_SEQ;
struct.nlmsg_pid = TEST_NLMSG_PID;
return struct;
@ -62,6 +67,11 @@ public class StructNlMsgHdrTest {
fail("\"" + actualValue + "\" does not contain \"" + expectedSubstring + "\"");
}
private static void assertNotContains(String actualValue, String unexpectedSubstring) {
if (!actualValue.contains(unexpectedSubstring)) return;
fail("\"" + actualValue + "\" contains \"" + unexpectedSubstring + "\"");
}
@Test
public void testToString() {
StructNlMsgHdr struct = makeStructNlMsgHdr(NetlinkConstants.RTM_NEWADDR);
@ -99,4 +109,31 @@ public class StructNlMsgHdrTest {
assertContains(s, TEST_NLMSG_PID_STR);
assertContains(s, "nlmsg_type{20(SOCK_DIAG_BY_FAMILY)}");
}
@Test
public void testToString_flags_dumpRequest() {
final short flags = StructNlMsgHdr.NLM_F_REQUEST | StructNlMsgHdr.NLM_F_DUMP;
StructNlMsgHdr struct = makeStructNlMsgHdr(NetlinkConstants.RTM_GETROUTE, flags);
String s = struct.toString(OsConstants.NETLINK_ROUTE);
assertContains(s, "RTM_GETROUTE");
assertContains(s, "NLM_F_REQUEST");
assertContains(s, "NLM_F_DUMP");
// NLM_F_DUMP = NLM_F_ROOT | NLM_F_MATCH;
assertNotContains(s, "NLM_F_MATCH");
assertNotContains(s, "NLM_F_ROOT");
}
@Test
public void testToString_flags_root() {
final short flags = StructNlMsgHdr.NLM_F_ROOT;
StructNlMsgHdr struct = makeStructNlMsgHdr(NetlinkConstants.RTM_GETROUTE, flags);
String s = struct.toString(OsConstants.NETLINK_ROUTE);
assertContains(s, "NLM_F_ROOT");
// NLM_F_DUMP = NLM_F_ROOT | NLM_F_MATCH;
assertNotContains(s, "NLM_F_DUMP");
}
}