mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
18a47e6d8a
A buffer is incorrectly zeroed to the length of the pointer. If
cfg_payload_len < sizeof(void *) this can overwrites unrelated memory.
The buffer contents are never read, so no need to zero.
Fixes: 8fe2f761ca
("net-timestamp: expand documentation")
Reported-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
470 lines
11 KiB
C
470 lines
11 KiB
C
/*
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* Copyright 2014 Google Inc.
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* Author: willemb@google.com (Willem de Bruijn)
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*
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* Test software tx timestamping, including
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*
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* - SCHED, SND and ACK timestamps
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* - RAW, UDP and TCP
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* - IPv4 and IPv6
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* - various packet sizes (to test GSO and TSO)
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*
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* Consult the command line arguments for help on running
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* the various testcases.
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*
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* This test requires a dummy TCP server.
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* A simple `nc6 [-u] -l -p $DESTPORT` will do
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <arpa/inet.h>
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#include <asm/types.h>
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#include <error.h>
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#include <errno.h>
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#include <linux/errqueue.h>
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#include <linux/if_ether.h>
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#include <linux/net_tstamp.h>
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#include <netdb.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/udp.h>
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#include <netinet/tcp.h>
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#include <netpacket/packet.h>
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#include <poll.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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/* command line parameters */
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static int cfg_proto = SOCK_STREAM;
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static int cfg_ipproto = IPPROTO_TCP;
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static int cfg_num_pkts = 4;
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static int do_ipv4 = 1;
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static int do_ipv6 = 1;
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static int cfg_payload_len = 10;
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static uint16_t dest_port = 9000;
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static struct sockaddr_in daddr;
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static struct sockaddr_in6 daddr6;
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static struct timespec ts_prev;
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static void __print_timestamp(const char *name, struct timespec *cur,
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uint32_t key, int payload_len)
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{
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if (!(cur->tv_sec | cur->tv_nsec))
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return;
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fprintf(stderr, " %s: %lu s %lu us (seq=%u, len=%u)",
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name, cur->tv_sec, cur->tv_nsec / 1000,
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key, payload_len);
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if ((ts_prev.tv_sec | ts_prev.tv_nsec)) {
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int64_t cur_ms, prev_ms;
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cur_ms = (long) cur->tv_sec * 1000 * 1000;
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cur_ms += cur->tv_nsec / 1000;
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prev_ms = (long) ts_prev.tv_sec * 1000 * 1000;
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prev_ms += ts_prev.tv_nsec / 1000;
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fprintf(stderr, " (%+ld us)", cur_ms - prev_ms);
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}
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ts_prev = *cur;
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fprintf(stderr, "\n");
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}
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static void print_timestamp_usr(void)
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{
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struct timespec ts;
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struct timeval tv; /* avoid dependency on -lrt */
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gettimeofday(&tv, NULL);
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ts.tv_sec = tv.tv_sec;
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ts.tv_nsec = tv.tv_usec * 1000;
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__print_timestamp(" USR", &ts, 0, 0);
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}
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static void print_timestamp(struct scm_timestamping *tss, int tstype,
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int tskey, int payload_len)
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{
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const char *tsname;
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switch (tstype) {
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case SCM_TSTAMP_SCHED:
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tsname = " ENQ";
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break;
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case SCM_TSTAMP_SND:
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tsname = " SND";
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break;
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case SCM_TSTAMP_ACK:
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tsname = " ACK";
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break;
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default:
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error(1, 0, "unknown timestamp type: %u",
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tstype);
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}
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__print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
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}
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static void __poll(int fd)
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{
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struct pollfd pollfd;
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int ret;
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memset(&pollfd, 0, sizeof(pollfd));
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pollfd.fd = fd;
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ret = poll(&pollfd, 1, 100);
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if (ret != 1)
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error(1, errno, "poll");
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}
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static void __recv_errmsg_cmsg(struct msghdr *msg, int payload_len)
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{
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struct sock_extended_err *serr = NULL;
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struct scm_timestamping *tss = NULL;
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struct cmsghdr *cm;
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for (cm = CMSG_FIRSTHDR(msg);
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cm && cm->cmsg_len;
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cm = CMSG_NXTHDR(msg, cm)) {
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if (cm->cmsg_level == SOL_SOCKET &&
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cm->cmsg_type == SCM_TIMESTAMPING) {
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tss = (void *) CMSG_DATA(cm);
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} else if ((cm->cmsg_level == SOL_IP &&
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cm->cmsg_type == IP_RECVERR) ||
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(cm->cmsg_level == SOL_IPV6 &&
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cm->cmsg_type == IPV6_RECVERR)) {
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serr = (void *) CMSG_DATA(cm);
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if (serr->ee_errno != ENOMSG ||
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serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {
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fprintf(stderr, "unknown ip error %d %d\n",
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serr->ee_errno,
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serr->ee_origin);
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serr = NULL;
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}
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} else
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fprintf(stderr, "unknown cmsg %d,%d\n",
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cm->cmsg_level, cm->cmsg_type);
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}
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if (serr && tss)
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print_timestamp(tss, serr->ee_info, serr->ee_data, payload_len);
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}
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static int recv_errmsg(int fd)
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{
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static char ctrl[1024 /* overprovision*/];
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static struct msghdr msg;
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struct iovec entry;
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static char *data;
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int ret = 0;
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data = malloc(cfg_payload_len);
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if (!data)
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error(1, 0, "malloc");
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memset(&msg, 0, sizeof(msg));
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memset(&entry, 0, sizeof(entry));
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memset(ctrl, 0, sizeof(ctrl));
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entry.iov_base = data;
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entry.iov_len = cfg_payload_len;
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msg.msg_iov = &entry;
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msg.msg_iovlen = 1;
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msg.msg_name = NULL;
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msg.msg_namelen = 0;
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msg.msg_control = ctrl;
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msg.msg_controllen = sizeof(ctrl);
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ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
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if (ret == -1 && errno != EAGAIN)
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error(1, errno, "recvmsg");
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__recv_errmsg_cmsg(&msg, ret);
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free(data);
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return ret == -1;
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}
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static void do_test(int family, unsigned int opt)
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{
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char *buf;
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int fd, i, val, total_len;
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if (family == IPPROTO_IPV6 && cfg_proto != SOCK_STREAM) {
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/* due to lack of checksum generation code */
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fprintf(stderr, "test: skipping datagram over IPv6\n");
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return;
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}
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total_len = cfg_payload_len;
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if (cfg_proto == SOCK_RAW) {
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total_len += sizeof(struct udphdr);
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if (cfg_ipproto == IPPROTO_RAW)
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total_len += sizeof(struct iphdr);
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}
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buf = malloc(total_len);
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if (!buf)
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error(1, 0, "malloc");
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fd = socket(family, cfg_proto, cfg_ipproto);
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if (fd < 0)
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error(1, errno, "socket");
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if (cfg_proto == SOCK_STREAM) {
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val = 1;
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if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
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(char*) &val, sizeof(val)))
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error(1, 0, "setsockopt no nagle");
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if (family == PF_INET) {
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if (connect(fd, (void *) &daddr, sizeof(daddr)))
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error(1, errno, "connect ipv4");
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} else {
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if (connect(fd, (void *) &daddr6, sizeof(daddr6)))
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error(1, errno, "connect ipv6");
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}
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}
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opt |= SOF_TIMESTAMPING_SOFTWARE |
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SOF_TIMESTAMPING_OPT_ID;
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if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
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(char *) &opt, sizeof(opt)))
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error(1, 0, "setsockopt timestamping");
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for (i = 0; i < cfg_num_pkts; i++) {
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memset(&ts_prev, 0, sizeof(ts_prev));
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memset(buf, 'a' + i, total_len);
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buf[total_len - 2] = '\n';
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buf[total_len - 1] = '\0';
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if (cfg_proto == SOCK_RAW) {
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struct udphdr *udph;
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int off = 0;
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if (cfg_ipproto == IPPROTO_RAW) {
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struct iphdr *iph = (void *) buf;
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memset(iph, 0, sizeof(*iph));
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iph->ihl = 5;
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iph->version = 4;
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iph->ttl = 2;
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iph->daddr = daddr.sin_addr.s_addr;
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iph->protocol = IPPROTO_UDP;
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/* kernel writes saddr, csum, len */
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off = sizeof(*iph);
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}
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udph = (void *) buf + off;
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udph->source = ntohs(9000); /* random spoof */
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udph->dest = ntohs(dest_port);
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udph->len = ntohs(sizeof(*udph) + cfg_payload_len);
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udph->check = 0; /* not allowed for IPv6 */
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}
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print_timestamp_usr();
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if (cfg_proto != SOCK_STREAM) {
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if (family == PF_INET)
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val = sendto(fd, buf, total_len, 0, (void *) &daddr, sizeof(daddr));
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else
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val = sendto(fd, buf, total_len, 0, (void *) &daddr6, sizeof(daddr6));
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} else {
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val = send(fd, buf, cfg_payload_len, 0);
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}
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if (val != total_len)
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error(1, errno, "send");
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/* wait for all errors to be queued, else ACKs arrive OOO */
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usleep(50 * 1000);
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__poll(fd);
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while (!recv_errmsg(fd)) {}
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}
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if (close(fd))
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error(1, errno, "close");
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free(buf);
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usleep(400 * 1000);
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}
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static void __attribute__((noreturn)) usage(const char *filepath)
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{
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fprintf(stderr, "\nUsage: %s [options] hostname\n"
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"\nwhere options are:\n"
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" -4: only IPv4\n"
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" -6: only IPv6\n"
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" -h: show this message\n"
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" -l N: send N bytes at a time\n"
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" -r: use raw\n"
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" -R: use raw (IP_HDRINCL)\n"
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" -p N: connect to port N\n"
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" -u: use udp\n",
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filepath);
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exit(1);
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}
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static void parse_opt(int argc, char **argv)
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{
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int proto_count = 0;
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char c;
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while ((c = getopt(argc, argv, "46hl:p:rRu")) != -1) {
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switch (c) {
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case '4':
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do_ipv6 = 0;
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break;
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case '6':
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do_ipv4 = 0;
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break;
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case 'r':
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proto_count++;
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cfg_proto = SOCK_RAW;
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cfg_ipproto = IPPROTO_UDP;
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break;
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case 'R':
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proto_count++;
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cfg_proto = SOCK_RAW;
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cfg_ipproto = IPPROTO_RAW;
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break;
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case 'u':
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proto_count++;
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cfg_proto = SOCK_DGRAM;
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cfg_ipproto = IPPROTO_UDP;
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break;
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case 'l':
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cfg_payload_len = strtoul(optarg, NULL, 10);
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break;
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case 'p':
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dest_port = strtoul(optarg, NULL, 10);
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break;
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case 'h':
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default:
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usage(argv[0]);
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}
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}
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if (!cfg_payload_len)
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error(1, 0, "payload may not be nonzero");
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if (cfg_proto != SOCK_STREAM && cfg_payload_len > 1472)
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error(1, 0, "udp packet might exceed expected MTU");
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if (!do_ipv4 && !do_ipv6)
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error(1, 0, "pass -4 or -6, not both");
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if (proto_count > 1)
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error(1, 0, "pass -r, -R or -u, not multiple");
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if (optind != argc - 1)
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error(1, 0, "missing required hostname argument");
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}
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static void resolve_hostname(const char *hostname)
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{
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struct addrinfo *addrs, *cur;
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int have_ipv4 = 0, have_ipv6 = 0;
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if (getaddrinfo(hostname, NULL, NULL, &addrs))
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error(1, errno, "getaddrinfo");
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cur = addrs;
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while (cur && !have_ipv4 && !have_ipv6) {
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if (!have_ipv4 && cur->ai_family == AF_INET) {
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memcpy(&daddr, cur->ai_addr, sizeof(daddr));
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daddr.sin_port = htons(dest_port);
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have_ipv4 = 1;
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}
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else if (!have_ipv6 && cur->ai_family == AF_INET6) {
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memcpy(&daddr6, cur->ai_addr, sizeof(daddr6));
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daddr6.sin6_port = htons(dest_port);
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have_ipv6 = 1;
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}
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cur = cur->ai_next;
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}
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if (addrs)
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freeaddrinfo(addrs);
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do_ipv4 &= have_ipv4;
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do_ipv6 &= have_ipv6;
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}
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static void do_main(int family)
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{
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fprintf(stderr, "family: %s\n",
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family == PF_INET ? "INET" : "INET6");
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fprintf(stderr, "test SND\n");
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do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE);
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fprintf(stderr, "test ENQ\n");
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do_test(family, SOF_TIMESTAMPING_TX_SCHED);
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fprintf(stderr, "test ENQ + SND\n");
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do_test(family, SOF_TIMESTAMPING_TX_SCHED |
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SOF_TIMESTAMPING_TX_SOFTWARE);
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if (cfg_proto == SOCK_STREAM) {
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fprintf(stderr, "\ntest ACK\n");
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do_test(family, SOF_TIMESTAMPING_TX_ACK);
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fprintf(stderr, "\ntest SND + ACK\n");
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do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE |
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SOF_TIMESTAMPING_TX_ACK);
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fprintf(stderr, "\ntest ENQ + SND + ACK\n");
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do_test(family, SOF_TIMESTAMPING_TX_SCHED |
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SOF_TIMESTAMPING_TX_SOFTWARE |
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SOF_TIMESTAMPING_TX_ACK);
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}
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}
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const char *sock_names[] = { NULL, "TCP", "UDP", "RAW" };
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int main(int argc, char **argv)
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{
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if (argc == 1)
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usage(argv[0]);
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parse_opt(argc, argv);
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resolve_hostname(argv[argc - 1]);
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fprintf(stderr, "protocol: %s\n", sock_names[cfg_proto]);
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fprintf(stderr, "payload: %u\n", cfg_payload_len);
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fprintf(stderr, "server port: %u\n", dest_port);
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fprintf(stderr, "\n");
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if (do_ipv4)
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do_main(PF_INET);
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if (do_ipv6)
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do_main(PF_INET6);
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return 0;
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}
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