From 5a9b0f1ef83300f853e77ada03515c8542c1cfe0 Mon Sep 17 00:00:00 2001
From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Thu, 29 Aug 2019 19:03:51 +0200
Subject: [PATCH] sockaddr: properly decode sockaddr_hci addresses without
hci_channel
Before Linux commit v2.6.38-rc1~476^2~14^2~3^2~43^2~9,
struct sockaddr_hci did not contain hci_channel field.
* configure.ac (AC_CHECK_HEADERS([bluetooth/bluetooth.h])): Add check
for struct sockaddr_hci.hci_channel.
* sockaddr.c (print_sockaddr_data_bt): Decode struct sockaddr_hci
without hci_channel field.
* tests/net-sockaddr.c (check_hci): Add check for struct sockaddr_hci
decoding without hci_channel field; guard hci_channel with #ifdef
HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL.
(check_raw): Remove "len++", as 4-byte AF_BLUETOOTH socket addresses are
interpreted as struct sockaddr_hci without hci_channel field.
---
configure.ac | 3 +++
sockaddr.c | 16 +++++++++++++---
tests/net-sockaddr.c | 18 ++++++++++++++----
3 files changed, 30 insertions(+), 7 deletions(-)
Index: strace-5.1/configure.ac
===================================================================
--- strace-5.1.orig/configure.ac 2019-08-29 19:10:22.380362280 +0200
+++ strace-5.1/configure.ac 2019-08-29 19:11:11.240744864 +0200
@@ -465,6 +465,9 @@
])
AC_CHECK_HEADERS([bluetooth/bluetooth.h], [
+ AC_CHECK_MEMBERS([struct sockaddr_hci.hci_channel],,,
+ [#include <bluetooth/bluetooth.h>
+ #include <bluetooth/hci.h>])
AC_CHECK_MEMBERS([struct sockaddr_l2.l2_bdaddr_type],,,
[#include <bluetooth/bluetooth.h>
#include <bluetooth/l2cap.h>])
Index: strace-5.1/sockaddr.c
===================================================================
--- strace-5.1.orig/sockaddr.c 2019-08-29 19:11:11.240744864 +0200
+++ strace-5.1/sockaddr.c 2019-08-29 19:13:01.275354429 +0200
@@ -599,12 +599,21 @@
};
switch (addrlen) {
+ case offsetofend(struct sockaddr_hci, hci_dev):
case sizeof(struct sockaddr_hci): {
const struct sockaddr_hci *const hci = buf;
- tprintf("hci_dev=htobs(%hu), hci_channel=",
- btohs(hci->hci_dev));
- printxval_index(hci_channels, hci->hci_channel,
- "HCI_CHANNEL_???");
+ tprintf("hci_dev=htobs(%hu)", btohs(hci->hci_dev));
+
+ /*
+ * hci_channel field has been introduced
+ * Linux commit in v2.6.38-rc1~476^2~14^2~3^2~43^2~9.
+ */
+ if (addrlen == sizeof(struct sockaddr_hci)) {
+ tprints(", hci_channel=");
+ printxval_index(hci_channels, hci->hci_channel,
+ "HCI_CHANNEL_???");
+ }
+
break;
}
case sizeof(struct sockaddr_sco): {
Index: strace-5.1/tests/net-sockaddr.c
===================================================================
--- strace-5.1.orig/tests/net-sockaddr.c 2019-08-29 19:10:22.380362280 +0200
+++ strace-5.1/tests/net-sockaddr.c 2019-08-29 19:11:11.240744864 +0200
@@ -543,11 +543,22 @@
TAIL_ALLOC_OBJECT_VAR_PTR(struct sockaddr_hci, hci);
hci->hci_family = AF_BLUETOOTH;
hci->hci_dev = htobs(h_port);
+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
hci->hci_channel = HCI_CHANNEL_RAW;
+# endif
unsigned int len = sizeof(*hci);
- int ret = connect(-1, (void *) hci, len);
+
+ int ret = connect(-1, (void *) hci, 4);
+ printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
+ "}, 4) = %d EBADF (%m)\n",
+ h_port, ret);
+
+ ret = connect(-1, (void *) hci, len);
printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
- ", hci_channel=HCI_CHANNEL_RAW}, %u) = %d EBADF (%m)\n",
+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
+ ", hci_channel=HCI_CHANNEL_RAW"
+# endif
+ "}, %u) = %d EBADF (%m)\n",
h_port, len, ret);
}
@@ -700,9 +711,8 @@
" = %d EBADF (%m)\n", len, ret);
u.sa->sa_family = AF_BLUETOOTH;
- ++len;
ret = connect(-1, (void *) u.st, len);
- printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"00\"}, %u)"
+ printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"0\"}, %u)"
" = %d EBADF (%m)\n", len, ret);
}
Index: strace-5.1/tests-m32/net-sockaddr.c
===================================================================
--- strace-5.1.orig/tests-m32/net-sockaddr.c 2019-03-18 03:40:16.000000000 +0100
+++ strace-5.1/tests-m32/net-sockaddr.c 2019-08-29 19:16:28.327738043 +0200
@@ -543,11 +543,22 @@
TAIL_ALLOC_OBJECT_VAR_PTR(struct sockaddr_hci, hci);
hci->hci_family = AF_BLUETOOTH;
hci->hci_dev = htobs(h_port);
+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
hci->hci_channel = HCI_CHANNEL_RAW;
+# endif
unsigned int len = sizeof(*hci);
- int ret = connect(-1, (void *) hci, len);
+
+ int ret = connect(-1, (void *) hci, 4);
+ printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
+ "}, 4) = %d EBADF (%m)\n",
+ h_port, ret);
+
+ ret = connect(-1, (void *) hci, len);
printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
- ", hci_channel=HCI_CHANNEL_RAW}, %u) = %d EBADF (%m)\n",
+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
+ ", hci_channel=HCI_CHANNEL_RAW"
+# endif
+ "}, %u) = %d EBADF (%m)\n",
h_port, len, ret);
}
@@ -700,9 +711,8 @@
" = %d EBADF (%m)\n", len, ret);
u.sa->sa_family = AF_BLUETOOTH;
- ++len;
ret = connect(-1, (void *) u.st, len);
- printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"00\"}, %u)"
+ printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"0\"}, %u)"
" = %d EBADF (%m)\n", len, ret);
}
Index: strace-5.1/tests-mx32/net-sockaddr.c
===================================================================
--- strace-5.1.orig/tests-mx32/net-sockaddr.c 2019-03-18 03:40:16.000000000 +0100
+++ strace-5.1/tests-mx32/net-sockaddr.c 2019-08-29 19:16:30.805706731 +0200
@@ -543,11 +543,22 @@
TAIL_ALLOC_OBJECT_VAR_PTR(struct sockaddr_hci, hci);
hci->hci_family = AF_BLUETOOTH;
hci->hci_dev = htobs(h_port);
+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
hci->hci_channel = HCI_CHANNEL_RAW;
+# endif
unsigned int len = sizeof(*hci);
- int ret = connect(-1, (void *) hci, len);
+
+ int ret = connect(-1, (void *) hci, 4);
+ printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
+ "}, 4) = %d EBADF (%m)\n",
+ h_port, ret);
+
+ ret = connect(-1, (void *) hci, len);
printf("connect(-1, {sa_family=AF_BLUETOOTH, hci_dev=htobs(%hu)"
- ", hci_channel=HCI_CHANNEL_RAW}, %u) = %d EBADF (%m)\n",
+# ifdef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
+ ", hci_channel=HCI_CHANNEL_RAW"
+# endif
+ "}, %u) = %d EBADF (%m)\n",
h_port, len, ret);
}
@@ -700,9 +711,8 @@
" = %d EBADF (%m)\n", len, ret);
u.sa->sa_family = AF_BLUETOOTH;
- ++len;
ret = connect(-1, (void *) u.st, len);
- printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"00\"}, %u)"
+ printf("connect(-1, {sa_family=AF_BLUETOOTH, sa_data=\"0\"}, %u)"
" = %d EBADF (%m)\n", len, ret);
}
Index: strace-5.1/configure
===================================================================
--- strace-5.1.orig/configure 2019-08-30 17:41:22.748513960 +0200
+++ strace-5.1/configure 2019-08-30 17:41:43.118251704 +0200
@@ -12037,6 +12037,18 @@
#define HAVE_BLUETOOTH_BLUETOOTH_H 1
_ACEOF
+ ac_fn_c_check_member "$LINENO" "struct sockaddr_hci" "hci_channel" "ac_cv_member_struct_sockaddr_hci_hci_channel" "#include <bluetooth/bluetooth.h>
+ #include <bluetooth/hci.h>
+"
+if test "x$ac_cv_member_struct_sockaddr_hci_hci_channel" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL 1
+_ACEOF
+
+
+fi
+
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>
#include <bluetooth/l2cap.h>
"
Index: strace-5.1/config.h.in
===================================================================
--- strace-5.1.orig/config.h.in 2019-05-22 15:08:39.000000000 +0200
+++ strace-5.1/config.h.in 2019-08-30 18:32:25.431500194 +0200
@@ -1391,6 +1391,9 @@
/* Define to 1 if the system has the type `struct sigcontext'. */
#undef HAVE_STRUCT_SIGCONTEXT
+/* Define to 1 if `hci_channel' is a member of `struct sockaddr_hci'. */
+#undef HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL
+
/* Define to 1 if `l2_bdaddr_type' is a member of `struct sockaddr_l2'. */
#undef HAVE_STRUCT_SOCKADDR_L2_L2_BDADDR_TYPE