Add support for NetBSD's socketcan implementation.

Tested with the example from
http://www.bencz.com/hacks/2016/07/10/python-and-socketcan/
Needs <netcan/can.h> rev 1.3 or newer.

1 files changed, 71 insertions, 0 deletions

diff --git a/lang/python36/patches/patch-Modules_socketmodule.c b/lang/python36/patches/patch-Modules_socketmodule.c
new file mode 100644
index 00000000000..bdbf9d4e4e2
--- /dev/null
+++ b/lang/python36/patches/patch-Modules_socketmodule.c
@@ -0,0 +1,71 @@
+$NetBSD: patch-Modules_socketmodule.c,v 1.1 2017/05/30 13:36:39 bouyer Exp $
+
+Support NetBSD's socketcan implementation
+
+--- Modules/socketmodule.c.orig	2017-05-30 13:31:59.096006411 +0200
++++ Modules/socketmodule.c	2017-05-30 13:37:39.696032387 +0200
+@@ -1405,8 +1405,13 @@
+         /* need to look up interface name given index */
+         if (a->can_ifindex) {
+             ifr.ifr_ifindex = a->can_ifindex;
++#ifdef __NetBSD__
++            if (if_indextoname(a->can_ifindex, ifr.ifr_name) != NULL)
++                ifname = ifr.ifr_name;
++#else
+             if (ioctl(sockfd, SIOCGIFNAME, &ifr) == 0)
+                 ifname = ifr.ifr_name;
++#endif /* __NetBSD__ */
+         }
+ 
+         return Py_BuildValue("O&h", PyUnicode_DecodeFSDefault,
+@@ -1905,12 +1910,14 @@
+     }
+ #endif
+ 
+-#if defined(AF_CAN) && defined(CAN_RAW) && defined(CAN_BCM)
++#if defined(AF_CAN) && defined(CAN_RAW)
+     case AF_CAN:
+         switch (s->sock_proto) {
+         case CAN_RAW:
++#ifdef CAN_BCM
+         /* fall-through */
+         case CAN_BCM:
++#endif
+         {
+             struct sockaddr_can *addr;
+             PyObject *interfaceName;
+@@ -1930,7 +1937,12 @@
+             } else if ((size_t)len < sizeof(ifr.ifr_name)) {
+                 strncpy(ifr.ifr_name, PyBytes_AS_STRING(interfaceName), sizeof(ifr.ifr_name));
+                 ifr.ifr_name[(sizeof(ifr.ifr_name))-1] = '\0';
+-                if (ioctl(s->sock_fd, SIOCGIFINDEX, &ifr) < 0) {
++#ifdef __NetBSD__
++                if ((ifr.ifr_ifindex = if_nametoindex(ifr.ifr_name)) == 0)
++#else
++                if (ioctl(s->sock_fd, SIOCGIFINDEX, &ifr) < 0)
++#endif
++		{
+                     s->errorhandler();
+                     Py_DECREF(interfaceName);
+                     return 0;
+@@ -7136,6 +7148,20 @@
+     PyModule_AddIntConstant(m, "CAN_BCM_RX_TIMEOUT", RX_TIMEOUT);
+     PyModule_AddIntConstant(m, "CAN_BCM_RX_CHANGED", RX_CHANGED);
+ #endif
++#ifdef HAVE_NETCAN_CAN_H
++    PyModule_AddIntMacro(m, CAN_EFF_FLAG);
++    PyModule_AddIntMacro(m, CAN_RTR_FLAG);
++    PyModule_AddIntMacro(m, CAN_ERR_FLAG);
++
++    PyModule_AddIntMacro(m, CAN_SFF_MASK);
++    PyModule_AddIntMacro(m, CAN_EFF_MASK);
++    PyModule_AddIntMacro(m, CAN_ERR_MASK);
++
++    PyModule_AddIntMacro(m, CAN_RAW_FILTER);
++    /* PyModule_AddIntMacro(m, CAN_RAW_ERR_FILTER); */
++    PyModule_AddIntMacro(m, CAN_RAW_LOOPBACK);
++    PyModule_AddIntMacro(m, CAN_RAW_RECV_OWN_MSGS);
++#endif
+ #ifdef SOL_RDS
+     PyModule_AddIntMacro(m, SOL_RDS);
+ #endif