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From 5a9b0f1ef83300f853e77ada03515c8542c1cfe0 Mon Sep 17 00:00:00 2001
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From: Eugene Syromyatnikov <evgsyr@gmail.com>
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Date: Thu, 29 Aug 2019 19:03:51 +0200
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Subject: [PATCH] sockaddr: properly decode sockaddr_hci addresses without
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hci_channel
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Before Linux commit v2.6.38-rc1~476^2~14^2~3^2~43^2~9,
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struct sockaddr_hci did not contain hci_channel field.
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* configure.ac (AC_CHECK_HEADERS([bluetooth/bluetooth.h])): Add check
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for struct sockaddr_hci.hci_channel.
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* sockaddr.c (print_sockaddr_data_bt): Decode struct sockaddr_hci
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without hci_channel field.
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* tests/net-sockaddr.c (check_hci): Add check for struct sockaddr_hci
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decoding without hci_channel field; guard hci_channel with #ifdef
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HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL.
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(check_raw): Remove "len++", as 4-byte AF_BLUETOOTH socket addresses are
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interpreted as struct sockaddr_hci without hci_channel field.
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---
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configure.ac | 3 +++
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sockaddr.c | 16 +++++++++++++---
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tests/net-sockaddr.c | 18 ++++++++++++++----
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3 files changed, 30 insertions(+), 7 deletions(-)
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Index: strace-4.24/configure.ac
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===================================================================
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--- strace-4.24.orig/configure.ac 2020-01-26 13:47:02.277446765 +0100
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+++ strace-4.24/configure.ac 2020-01-26 13:47:08.976575337 +0100
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@@ -458,6 +458,9 @@
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])
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AC_CHECK_HEADERS([bluetooth/bluetooth.h], [
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+ AC_CHECK_MEMBERS([struct sockaddr_hci.hci_channel],,,
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+ [#include <bluetooth/bluetooth.h>
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+ #include <bluetooth/hci.h>])
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AC_CHECK_MEMBERS([struct sockaddr_l2.l2_bdaddr_type],,,
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[#include <bluetooth/bluetooth.h>
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#include <bluetooth/l2cap.h>])
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Index: strace-4.24/sockaddr.c
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===================================================================
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--- strace-4.24.orig/sockaddr.c 2020-01-26 13:47:08.977575356 +0100
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+++ strace-4.24/sockaddr.c 2020-01-27 16:26:32.975222449 +0100
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@@ -355,12 +355,21 @@
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};
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switch (addrlen) {
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+ case offsetofend(struct sockaddr_hci, hci_dev):
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case sizeof(struct sockaddr_hci): {
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const struct sockaddr_hci *const hci = buf;
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- tprintf("hci_dev=htobs(%hu), hci_channel=",
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- btohs(hci->hci_dev));
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- printxval_index(hci_channels, hci->hci_channel,
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- "HCI_CHANNEL_???");
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+ tprintf("hci_dev=htobs(%hu)", btohs(hci->hci_dev));
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+
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+ /*
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+ * hci_channel field has been introduced
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+ * Linux commit in v2.6.38-rc1~476^2~14^2~3^2~43^2~9.
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+ */
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+ if (addrlen == sizeof(struct sockaddr_hci)) {
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+ tprints(", hci_channel=");
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+ printxval_index(hci_channels, hci->hci_channel,
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+ "HCI_CHANNEL_???");
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+ }
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+
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break;
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}
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case sizeof(struct sockaddr_sco): {
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Index: strace-4.24/tests/net-sockaddr.c
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===================================================================
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--- strace-4.24.orig/tests/net-sockaddr.c 2020-01-26 13:47:02.279446803 +0100
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+++ strace-4.24/tests/net-sockaddr.c 2020-01-26 13:47:08.979575395 +0100
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@@ -364,11 +364,22 @@
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TAIL_ALLOC_OBJECT_VAR_PTR(struct sockaddr_hci, hci);
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hci->hci_family = AF_BLUETOOTH;
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hci->hci_dev = htobs(h_port);
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+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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hci->hci_channel = HCI_CHANNEL_RAW;
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+# endif
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unsigned int len = sizeof(*hci);
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- int ret = connect(-1, (void *) hci, len);
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+
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+ int ret = connect(-1, (void *) hci, 4);
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+ printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
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+ "}, 4) = %d EBADF (%m)\n",
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+ h_port, ret);
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+
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+ ret = connect(-1, (void *) hci, len);
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printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
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- ", hci_channel=HCI_CHANNEL_RAW}, %u) = %d EBADF (%m)\n",
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+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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+ ", hci_channel=HCI_CHANNEL_RAW"
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+# endif
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+ "}, %u) = %d EBADF (%m)\n",
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h_port, len, ret);
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}
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@@ -521,9 +532,8 @@
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" = %d EBADF (%m)\n", len, ret);
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u.sa->sa_family = AF_BLUETOOTH;
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- ++len;
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ret = connect(-1, (void *) u.st, len);
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- printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"00\"}, %u)"
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+ printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"0\"}, %u)"
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" = %d EBADF (%m)\n", len, ret);
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}
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Index: strace-4.24/tests-m32/net-sockaddr.c
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===================================================================
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--- strace-4.24.orig/tests-m32/net-sockaddr.c 2020-01-26 13:47:02.282446861 +0100
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+++ strace-4.24/tests-m32/net-sockaddr.c 2020-01-26 13:47:08.979575395 +0100
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@@ -384,11 +384,22 @@
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TAIL_ALLOC_OBJECT_VAR_PTR(struct sockaddr_hci, hci);
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hci->hci_family = AF_BLUETOOTH;
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hci->hci_dev = htobs(h_port);
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+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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hci->hci_channel = HCI_CHANNEL_RAW;
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+# endif
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unsigned int len = sizeof(*hci);
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- int ret = connect(-1, (void *) hci, len);
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+
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+ int ret = connect(-1, (void *) hci, 4);
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+ printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
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+ "}, 4) = %d EBADF (%m)\n",
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+ h_port, ret);
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+
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+ ret = connect(-1, (void *) hci, len);
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printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
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- ", hci_channel=HCI_CHANNEL_RAW}, %u) = %d EBADF (%m)\n",
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+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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+ ", hci_channel=HCI_CHANNEL_RAW"
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+# endif
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+ "}, %u) = %d EBADF (%m)\n",
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h_port, len, ret);
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}
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@@ -541,9 +552,8 @@
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" = %d EBADF (%m)\n", len, ret);
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u.sa->sa_family = AF_BLUETOOTH;
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- ++len;
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ret = connect(-1, (void *) u.st, len);
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- printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"00\"}, %u)"
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+ printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"0\"}, %u)"
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" = %d EBADF (%m)\n", len, ret);
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}
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Index: strace-4.24/tests-mx32/net-sockaddr.c
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===================================================================
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--- strace-4.24.orig/tests-mx32/net-sockaddr.c 2020-01-26 13:47:02.282446861 +0100
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+++ strace-4.24/tests-mx32/net-sockaddr.c 2020-01-26 13:47:08.979575395 +0100
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@@ -384,11 +384,22 @@
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TAIL_ALLOC_OBJECT_VAR_PTR(struct sockaddr_hci, hci);
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hci->hci_family = AF_BLUETOOTH;
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hci->hci_dev = htobs(h_port);
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+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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hci->hci_channel = HCI_CHANNEL_RAW;
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+# endif
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unsigned int len = sizeof(*hci);
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- int ret = connect(-1, (void *) hci, len);
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+
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+ int ret = connect(-1, (void *) hci, 4);
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+ printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
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+ "}, 4) = %d EBADF (%m)\n",
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+ h_port, ret);
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+
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+ ret = connect(-1, (void *) hci, len);
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printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
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- ", hci_channel=HCI_CHANNEL_RAW}, %u) = %d EBADF (%m)\n",
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+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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+ ", hci_channel=HCI_CHANNEL_RAW"
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+# endif
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+ "}, %u) = %d EBADF (%m)\n",
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h_port, len, ret);
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}
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@@ -541,9 +552,8 @@
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" = %d EBADF (%m)\n", len, ret);
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u.sa->sa_family = AF_BLUETOOTH;
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- ++len;
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ret = connect(-1, (void *) u.st, len);
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- printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"00\"}, %u)"
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+ printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"0\"}, %u)"
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" = %d EBADF (%m)\n", len, ret);
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}
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Index: strace-4.24/configure
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===================================================================
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--- strace-4.24.orig/configure 2020-01-26 13:47:02.285446919 +0100
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+++ strace-4.24/configure 2020-01-26 13:47:08.981575433 +0100
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@@ -11240,6 +11240,18 @@
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#define HAVE_BLUETOOTH_BLUETOOTH_H 1
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_ACEOF
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+ ac_fn_c_check_member "$LINENO" "struct sockaddr_hci" "hci_channel" "ac_cv_member_struct_sockaddr_hci_hci_channel" "#include <bluetooth/bluetooth.h>
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+ #include <bluetooth/hci.h>
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+"
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+if test "x$ac_cv_member_struct_sockaddr_hci_hci_channel" = xyes; then :
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+
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+cat >>confdefs.h <<_ACEOF
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+#define HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL 1
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+_ACEOF
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+
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+
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+fi
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+
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ac_fn_c_check_member "$LINENO" "struct sockaddr_l2" "l2_bdaddr_type" "ac_cv_member_struct_sockaddr_l2_l2_bdaddr_type" "#include <bluetooth/bluetooth.h>
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#include <bluetooth/l2cap.h>
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"
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Index: strace-4.24/config.h.in
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===================================================================
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--- strace-4.24.orig/config.h.in 2020-01-26 13:47:02.287446957 +0100
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+++ strace-4.24/config.h.in 2020-01-26 13:47:08.982575452 +0100
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@@ -1315,6 +1315,9 @@
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/* Define to 1 if the system has the type `struct sigcontext'. */
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#undef HAVE_STRUCT_SIGCONTEXT
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+/* Define to 1 if `hci_channel' is a member of `struct sockaddr_hci'. */
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+#undef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
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+
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/* Define to 1 if `l2_bdaddr_type' is a member of `struct sockaddr_l2'. */
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#undef HAVE_STRUCT_SOCKADDR_L2_L2_BDADDR_TYPE
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