| Hugo Benichi | 7b314e1 | 2018-01-15 21:54:00 +0900 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "TcpSocketMonitor" |
| 18 | |
| 19 | #include "TcpSocketMonitor.h" |
| 20 | #include "DumpWriter.h" |
| 21 | |
| 22 | #include "SockDiag.h" |
| 23 | |
| 24 | #include <arpa/inet.h> |
| 25 | #include <netinet/tcp.h> |
| 26 | #include <linux/tcp.h> |
| 27 | |
| 28 | namespace android { |
| 29 | namespace net { |
| 30 | |
| 31 | constexpr const char* getTcpStateName(int t) { |
| 32 | switch (t) { |
| 33 | case TCP_ESTABLISHED: |
| 34 | return "ESTABLISHED"; |
| 35 | case TCP_SYN_SENT: |
| 36 | return "SYN-SENT"; |
| 37 | case TCP_SYN_RECV: |
| 38 | return "SYN-RECV"; |
| 39 | case TCP_FIN_WAIT1: |
| 40 | return "FIN-WAIT-1"; |
| 41 | case TCP_FIN_WAIT2: |
| 42 | return "FIN-WAIT-2"; |
| 43 | case TCP_TIME_WAIT: |
| 44 | return "TIME-WAIT"; |
| 45 | case TCP_CLOSE: |
| 46 | return "CLOSE"; |
| 47 | case TCP_CLOSE_WAIT: |
| 48 | return "CLOSE-WAIT"; |
| 49 | case TCP_LAST_ACK: |
| 50 | return "LAST-ACK"; |
| 51 | case TCP_LISTEN: |
| 52 | return "LISTEN"; |
| 53 | case TCP_CLOSING: |
| 54 | return "CLOSING"; |
| 55 | default: |
| 56 | return "UNKNOWN"; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static void tcpInfoPrint(DumpWriter &dw, const struct inet_diag_msg *sockinfo, |
| 61 | const struct tcp_info *tcpinfo) { |
| 62 | char saddr[INET6_ADDRSTRLEN] = {}; |
| 63 | char daddr[INET6_ADDRSTRLEN] = {}; |
| 64 | inet_ntop(sockinfo->idiag_family, &(sockinfo->id.idiag_src), saddr, sizeof(saddr)); |
| 65 | inet_ntop(sockinfo->idiag_family, &(sockinfo->id.idiag_dst), daddr, sizeof(daddr)); |
| 66 | |
| 67 | dw.println( |
| 68 | "uid=%u saddr=%s daddr=%s sport=%u dport=%u tcp_state=%s(%u) " |
| 69 | "rqueue=%u wqueue=%u rtt=%gms var_rtt=%gms rcv_rtt=%gms unacked=%u snd_cwnd=%u", |
| 70 | sockinfo->idiag_uid, |
| 71 | saddr, |
| 72 | daddr, |
| 73 | ntohs(sockinfo->id.idiag_sport), |
| 74 | ntohs(sockinfo->id.idiag_dport), |
| 75 | getTcpStateName(sockinfo->idiag_state), sockinfo->idiag_state, |
| 76 | sockinfo->idiag_rqueue, |
| 77 | sockinfo->idiag_wqueue, |
| 78 | tcpinfo != nullptr ? tcpinfo->tcpi_rtt/1000.0 : 0, |
| 79 | tcpinfo != nullptr ? tcpinfo->tcpi_rttvar/1000.0 : 0, |
| 80 | tcpinfo != nullptr ? tcpinfo->tcpi_rcv_rtt/1000.0 : 0, |
| 81 | tcpinfo != nullptr ? tcpinfo->tcpi_unacked : 0, |
| 82 | tcpinfo != nullptr ? tcpinfo->tcpi_snd_cwnd : 0); |
| 83 | } |
| 84 | |
| 85 | const String16 TcpSocketMonitor::DUMP_KEYWORD = String16("tcp_socket_info"); |
| 86 | |
| 87 | void TcpSocketMonitor::dump(DumpWriter& dw) { |
| 88 | dw.println("TcpSocketMonitor"); |
| 89 | dw.incIndent(); |
| 90 | |
| 91 | SockDiag sd; |
| 92 | if (!sd.open()) { |
| 93 | ALOGE("Error opening sock diag for dumping TCP socket info"); |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | const auto tcpInfoReader = [&dw](const struct inet_diag_msg *sockinfo, |
| 98 | const struct tcp_info *tcpinfo) { |
| 99 | tcpInfoPrint(dw, sockinfo, tcpinfo); |
| 100 | }; |
| 101 | |
| 102 | if (int ret = sd.getLiveTcpInfos(tcpInfoReader)) { |
| 103 | ALOGE("Failed to dump TCP socket info: %s", strerror(-ret)); |
| 104 | return; |
| 105 | } |
| 106 | |
| 107 | dw.decIndent(); |
| 108 | } |
| 109 | |
| 110 | } // namespace net |
| 111 | } // namespace android |