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author | David Sommerseth <davids@redhat.com> | 2010-07-30 19:30:30 +0200 |
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committer | David Sommerseth <davids@redhat.com> | 2010-07-30 19:30:30 +0200 |
commit | e9aa46ab32a45bd7fc0ad32573d1db84f5049554 (patch) | |
tree | a736740bf5c38a84cf0f7868d97bfc02fdf5aaed | |
parent | 1d4b0d894dd833cd9ac9e62cbdc400f24a11e32b (diff) | |
download | python-ethtool-e9aa46ab32a45bd7fc0ad32573d1db84f5049554.tar.gz python-ethtool-e9aa46ab32a45bd7fc0ad32573d1db84f5049554.tar.xz python-ethtool-e9aa46ab32a45bd7fc0ad32573d1db84f5049554.zip |
Improved IPv6 support
As the IPv6 protocol allows a single device to have more than one IPv6 address,
the previous implementation did not provide all IPv6 information. It would reject
all except the last parsed IPv6 address.
NOTE: This implementation will break the previous API.
This change removes the ethtool.etherinfo.ipv6_address and
ethtool.etherinfo.ipv6_netmask members. A new member is added,
ethtool.etherinfo.ipv6_addresses (in plural). This contains a tupple list
containing of ethtool.etherinfo_ipv6addr objects, one object for each configured
IPv6 address on the device. These objects have the following members available:
.address - The IPv6 address
.netmask - The IPv6 netmask (in bit notation)
.scope - A string with the IPv6 address scope
Example code:
import ethtool
devs = ethtool.get_interfaces_info('eth0')
for ip6 in devs[0].ipv6_addresses:
print "[%s] %s/%i" % (ip6.scope, ip6.address, ip6.netmask)
Signed-off-by: David Sommerseth <davids@redhat.com>
-rw-r--r-- | python-ethtool/etherinfo.c | 77 | ||||
-rw-r--r-- | python-ethtool/etherinfo.h | 2 | ||||
-rw-r--r-- | python-ethtool/etherinfo_ipv6_obj.c | 215 | ||||
-rw-r--r-- | python-ethtool/etherinfo_obj.c | 60 | ||||
-rw-r--r-- | python-ethtool/etherinfo_struct.h | 25 | ||||
-rw-r--r-- | python-ethtool/ethtool.c | 7 | ||||
-rw-r--r-- | setup.py | 3 |
7 files changed, 350 insertions, 39 deletions
diff --git a/python-ethtool/etherinfo.c b/python-ethtool/etherinfo.c index 7ae5798..68cc2e6 100644 --- a/python-ethtool/etherinfo.c +++ b/python-ethtool/etherinfo.c @@ -24,6 +24,7 @@ #include <stdlib.h> #include <asm/types.h> #include <sys/socket.h> +#include <netlink/route/rtnl.h> #include <assert.h> #include <errno.h> #include "etherinfo_struct.h" @@ -34,6 +35,30 @@ * Internal functions for working with struct etherinfo * */ +#define SET_STR_VALUE(dst, src) { \ + if( dst ) { \ + free(dst); \ + }; \ + dst = strdup(src); \ + } + + +void free_ipv6addresses(struct ipv6address *ptr) { + struct ipv6address *ipv6ptr = ptr; + + if( !ptr ) { + return; + } + + while( ipv6ptr ) { + struct ipv6address *tmp = ipv6ptr->next; + + free(ipv6ptr->address); + free(ipv6ptr); + ipv6ptr = tmp; + } +} + void free_etherinfo(struct etherinfo *ptr) { if( ptr == NULL ) { // Just for safety @@ -51,25 +76,35 @@ void free_etherinfo(struct etherinfo *ptr) if( ptr->ipv4_broadcast ) { free(ptr->ipv4_broadcast); } - if( ptr->ipv6_address ) { - free(ptr->ipv6_address); + if( ptr->ipv6_addresses ) { + free_ipv6addresses(ptr->ipv6_addresses); } free(ptr); } +struct ipv6address * etherinfo_add_ipv6(struct ipv6address *addrptr, const char *addr, int netmask, int scope) { + struct ipv6address *newaddr = NULL; + + newaddr = calloc(1, sizeof(struct ipv6address)+2); + if( !newaddr ) { + fprintf(stderr, "** ERROR ** Could not allocate memory for a new IPv6 address record (%s/%i [%i])", + addr, netmask, scope); + return addrptr; + } + + SET_STR_VALUE(newaddr->address, addr); + newaddr->netmask = netmask; + newaddr->scope = scope; + newaddr->next = addrptr; + return newaddr; +} + /* * libnl callback functions * */ -#define SET_STR_VALUE(dst, src) { \ - if( dst ) { \ - free(dst); \ - }; \ - dst = strdup(src); \ - } - static void callback_nl_link(struct nl_object *obj, void *arg) { struct etherinfo *ethi = (struct etherinfo *) arg; @@ -134,8 +169,10 @@ static void callback_nl_address(struct nl_object *obj, void *arg) SET_STR_VALUE(ethi->ipv4_broadcast, brdcst_str); } } else { - SET_STR_VALUE(ethi->ipv6_address, ip_str); - ethi->ipv6_netmask = rtnl_addr_get_prefixlen((struct rtnl_addr*) obj); + ethi->ipv6_addresses = etherinfo_add_ipv6(ethi->ipv6_addresses, + ip_str, + rtnl_addr_get_prefixlen((struct rtnl_addr*) obj), + rtnl_addr_get_scope((struct rtnl_addr*) obj)); } return; default: @@ -167,9 +204,17 @@ void dump_etherinfo(FILE *fp, struct etherinfo *ptr) } fprintf(fp, "\n"); } - if( ptr->ipv6_address ) { - fprintf(fp, "\tIPv6 address: %s/%i\n", - ptr->ipv6_address, ptr->ipv6_netmask); + if( ptr->ipv6_addresses ) { + struct ipv6address *ipv6 = ptr->ipv6_addresses; + + fprintf(fp, "\tIPv6 addresses:\n"); + for(; ipv6; ipv6 = ipv6->next) { + char scope[66]; + + rtnl_scope2str(ipv6->scope, scope, 64); + fprintf(fp, "\t [%s] %s/%i\n", + scope, ipv6->address, ipv6->netmask); + } } fprintf(fp, "\n"); } @@ -214,6 +259,10 @@ int get_etherinfo(struct etherinfo *ethinf, struct _nlconnection *nlc, nlQuery q break; case NLQRY_ADDR: + /* Remove old IPv6 information we might have */ + free_ipv6addresses(ethinf->ipv6_addresses); + ethinf->ipv6_addresses = NULL; + /* Extract IP address information */ addr_cache = rtnl_addr_alloc_cache(nlc->nlrt_handle); addr = rtnl_addr_alloc(); diff --git a/python-ethtool/etherinfo.h b/python-ethtool/etherinfo.h index 1b8c425..0d441a3 100644 --- a/python-ethtool/etherinfo.h +++ b/python-ethtool/etherinfo.h @@ -30,4 +30,6 @@ int get_etherinfo(struct etherinfo *ethinf, struct _nlconnection *nlc, nlQuery q void free_etherinfo(struct etherinfo *ptr); void dump_etherinfo(FILE *, struct etherinfo *); +void free_ipv6addresses(struct ipv6address *ptr); + #endif diff --git a/python-ethtool/etherinfo_ipv6_obj.c b/python-ethtool/etherinfo_ipv6_obj.c new file mode 100644 index 0000000..cec5248 --- /dev/null +++ b/python-ethtool/etherinfo_ipv6_obj.c @@ -0,0 +1,215 @@ +/** + * @file etherinfo_ipv6_obj.c + * @author David Sommerseth <davids@redhat.com> + * @date Thu Jul 29 17:51:28 2010 + * + * @brief Python ethtool.etherinfo class functions. + * + */ + +#include <Python.h> +#include "structmember.h" + +#include <netlink/route/rtnl.h> +#include "etherinfo_struct.h" +#include "etherinfo.h" + + +/** + * ethtool.etherinfo deallocator - cleans up when a object is deleted + * + * @param self etherinfo_ipv6_py object structure + */ +void _ethtool_etherinfo_ipv6_dealloc(etherinfo_ipv6_py *self) +{ + if( self->addrdata ) { + free_ipv6addresses(self->addrdata); + } + self->ob_type->tp_free((PyObject*)self); +} + + +/** + * ethtool.etherinfo function, creating a new etherinfo object + * + * @param type + * @param args + * @param kwds + * + * @return Returns in PyObject with the new object on success, otherwise NULL + */ +PyObject *_ethtool_etherinfo_ipv6_new(PyTypeObject *type, PyObject *args, PyObject *kwds) +{ + etherinfo_ipv6_py *self; + + self = (etherinfo_ipv6_py *)type->tp_alloc(type, 0); + return (PyObject *)self; +} + + +/** + * ethtool.etherinfo init (constructor) method. Makes sure the object is initialised correctly. + * + * @param self + * @param args + * @param kwds + * + * @return Returns 0 on success. + */ +int _ethtool_etherinfo_ipv6_init(etherinfo_ipv6_py *self, PyObject *args, PyObject *kwds) +{ + static char *etherinfo_kwlist[] = {"etherinfo_ipv6_ptr", NULL}; + PyObject *ethinf_ptr = NULL; + + if( !PyArg_ParseTupleAndKeywords(args, kwds, "O", etherinfo_kwlist, ðinf_ptr)) { + PyErr_SetString(PyExc_AttributeError, "Invalid data pointer to constructor"); + return -1; + } + self->addrdata = (struct ipv6address *) PyCObject_AsVoidPtr(ethinf_ptr); + return 0; +} + +/** + * ethtool.etherinfo function for retrieving data from a Python object. + * + * @param self + * @param attr_o contains the object member request (which element to return) + * + * @return Returns a PyObject with the value requested on success, otherwise NULL + */ +PyObject *_ethtool_etherinfo_ipv6_getter(etherinfo_ipv6_py *self, PyObject *attr_o) +{ + PyObject *ret; + char *attr = PyString_AsString(attr_o); + + if( !self || !self->addrdata ) { + PyErr_SetString(PyExc_AttributeError, "No data available"); + return NULL; + } + + if( strcmp(attr, "address") == 0 ) { + ret = RETURN_STRING(self->addrdata->address); + } else if( strcmp(attr, "netmask") == 0 ) { + ret = PyInt_FromLong(self->addrdata->netmask); + } else if( strcmp(attr, "scope") == 0 ) { + char scope[66]; + + rtnl_scope2str(self->addrdata->scope, scope, 66); + ret = PyString_FromString(scope); + } else { + ret = PyObject_GenericGetAttr((PyObject *)self, attr_o); + } + return ret; +} + + +/** + * ethtool.etherinfo function for setting a value to a object member. This feature is + * disabled by always returning -1, as the values are read-only by the user. + * + * @param self + * @param attr_o + * @param val_o + * + * @return Returns always -1 (failure). + */ +int _ethtool_etherinfo_ipv6_setter(etherinfo_ipv6_py *self, PyObject *attr_o, PyObject *val_o) +{ + PyErr_SetString(PyExc_AttributeError, "etherinfo_ipv6addr member values are read-only."); + return -1; +} + + +/** + * Creates a human readable format of the information when object is being treated as a string + * + * @param self + * + * @return Returns a PyObject with a string with all of the information + */ +PyObject *_ethtool_etherinfo_ipv6_str(etherinfo_ipv6_py *self) +{ + char scope[66]; + + if( !self || !self->addrdata ) { + PyErr_SetString(PyExc_AttributeError, "No data available"); + return NULL; + } + + rtnl_scope2str(self->addrdata->scope, scope, 64); + return PyString_FromFormat("[%s] %s/%i\n", + scope, + self->addrdata->address, + self->addrdata->netmask); +} + + +/** + * This is required by Python, which lists all accessible methods + * in the object. But no methods are provided. + * + */ +static PyMethodDef _ethtool_etherinfo_ipv6_methods[] = { + {NULL} /**< No methods defined */ +}; + +/** + * Defines all accessible object members + * + */ +static PyMemberDef _ethtool_etherinfo_ipv6_members[] = { + {"address", T_OBJECT_EX, offsetof(etherinfo_ipv6_py, addrdata), 0, + "IPv6 address"}, + {"netmask", T_OBJECT_EX, offsetof(etherinfo_ipv6_py, addrdata), 0, + "IPv6 netmask"}, + {"scope", T_OBJECT_EX, offsetof(etherinfo_ipv6_py, addrdata), 0, + "IPv6 IP address scope"}, + {NULL} /* End of member list */ +}; + +/** + * Definition of the functions a Python class/object requires. + * + */ +PyTypeObject ethtool_etherinfoIPv6Type = { + PyObject_HEAD_INIT(NULL) + 0, /*ob_size*/ + "ethtool.etherinfo_ipv6addr", /*tp_name*/ + sizeof(etherinfo_ipv6_py), /*tp_basicsize*/ + 0, /*tp_itemsize*/ + (destructor)_ethtool_etherinfo_ipv6_dealloc,/*tp_dealloc*/ + 0, /*tp_print*/ + 0, /*tp_getattr*/ + 0, /*tp_setattr*/ + 0, /*tp_compare*/ + 0, /*tp_repr*/ + 0, /*tp_as_number*/ + 0, /*tp_as_sequence*/ + 0, /*tp_as_mapping*/ + 0, /*tp_hash */ + 0, /*tp_call*/ + (reprfunc)_ethtool_etherinfo_ipv6_str, /*tp_str*/ + (getattrofunc)_ethtool_etherinfo_ipv6_getter, /*tp_getattro*/ + (setattrofunc)_ethtool_etherinfo_ipv6_setter, /*tp_setattro*/ + 0, /*tp_as_buffer*/ + Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ + "IPv6 address information", /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + 0, /* tp_iter */ + 0, /* tp_iternext */ + _ethtool_etherinfo_ipv6_methods, /* tp_methods */ + _ethtool_etherinfo_ipv6_members, /* tp_members */ + 0, /* tp_getset */ + 0, /* tp_base */ + 0, /* tp_dict */ + 0, /* tp_descr_get */ + 0, /* tp_descr_set */ + 0, /* tp_dictoffset */ + (initproc)_ethtool_etherinfo_ipv6_init, /* tp_init */ + 0, /* tp_alloc */ + _ethtool_etherinfo_ipv6_new, /* tp_new */ +}; + diff --git a/python-ethtool/etherinfo_obj.c b/python-ethtool/etherinfo_obj.c index 814da78..384e915 100644 --- a/python-ethtool/etherinfo_obj.c +++ b/python-ethtool/etherinfo_obj.c @@ -10,9 +10,11 @@ #include <Python.h> #include "structmember.h" +#include <netlink/route/rtnl.h> #include "etherinfo_struct.h" #include "etherinfo.h" +extern PyTypeObject ethtool_etherinfoIPv6Type; /** * ethtool.etherinfo deallocator - cleans up when a object is deleted @@ -72,15 +74,6 @@ int _ethtool_etherinfo_init(etherinfo_py *self, PyObject *args, PyObject *kwds) } /** - * NULL safe PyString_FromString() wrapper. If input string is NULL, None will be returned - * - * @param str Input C string (char *) - * - * @return Returns a PyObject with either the input string wrapped up, or a Python None value. - */ -#define RETURN_STRING(str) (str ? PyString_FromString(str) : Py_None); - -/** * ethtool.etherinfo function for retrieving data from a Python object. * * @param self @@ -112,12 +105,29 @@ PyObject *_ethtool_etherinfo_getter(etherinfo_py *self, PyObject *attr_o) } else if( strcmp(attr, "ipv4_broadcast") == 0 ) { get_etherinfo(self->data->ethinfo, self->data->nlc, NLQRY_ADDR); ret = RETURN_STRING(self->data->ethinfo->ipv4_broadcast); - } else if( strcmp(attr, "ipv6_address") == 0 ) { - get_etherinfo(self->data->ethinfo, self->data->nlc, NLQRY_ADDR); - ret = RETURN_STRING(self->data->ethinfo->ipv6_address); - } else if( strcmp(attr, "ipv6_netmask") == 0 ) { + } else if( strcmp(attr, "ipv6_addresses") == 0 ) { + struct ipv6address *ipv6 = NULL; + int i = 0; + ret = PyTuple_New(1); + get_etherinfo(self->data->ethinfo, self->data->nlc, NLQRY_ADDR); - ret = PyInt_FromLong(self->data->ethinfo->ipv6_netmask); + ipv6 = self->data->ethinfo->ipv6_addresses; + while( ipv6 ) { + PyObject *ipv6_pyobj = NULL, *ipv6_pydata = NULL, *args = NULL; + struct ipv6address *next = ipv6->next; + + ipv6->next = NULL; + ipv6_pydata = PyCObject_FromVoidPtr(ipv6, NULL); + args = PyTuple_New(1); + PyTuple_SetItem(args, 0, ipv6_pydata); + ipv6_pyobj = PyObject_CallObject((PyObject *)ðtool_etherinfoIPv6Type, args); + if( ipv6_pyobj ) { + PyTuple_SetItem(ret, i++, ipv6_pyobj); + _PyTuple_Resize(&ret, i+1); + } + ipv6 = next; + } + _PyTuple_Resize(&ret, i); } else { ret = PyObject_GenericGetAttr((PyObject *)self, attr_o); } @@ -180,11 +190,19 @@ PyObject *_ethtool_etherinfo_str(etherinfo_py *self) PyString_Concat(&ret, tmp); } - if( self->data->ethinfo->ipv6_address ) { - PyObject *tmp = PyString_FromFormat("\tIPv6 address: %s/%i\n", - self->data->ethinfo->ipv6_address, - self->data->ethinfo->ipv6_netmask); + if( self->data->ethinfo->ipv6_addresses ) { + struct ipv6address *ipv6 = self->data->ethinfo->ipv6_addresses; + PyObject *tmp = PyString_FromFormat("\tIPv6 addresses:\n"); PyString_Concat(&ret, tmp); + + for( ; ipv6; ipv6 = ipv6->next) { + char scope[66]; + + rtnl_scope2str(ipv6->scope, scope, 64); + PyObject *addr = PyString_FromFormat("\t [%s] %s/%i\n", + scope, ipv6->address, ipv6->netmask); + PyString_Concat(&ret, addr); + } } return ret; } @@ -214,10 +232,8 @@ static PyMemberDef _ethtool_etherinfo_members[] = { "IPv4 netmask in bits"}, {"ipv4_broadcast", T_OBJECT_EX, offsetof(etherinfo_py, data), 0, "IPv4 broadcast address"}, - {"ipv6_address", T_OBJECT_EX, offsetof(etherinfo_py, data), 0, - "IPv6 address"}, - {"ipv6_netmask", T_INT, offsetof(etherinfo_py, data), 0, - "IPv6 netmask in bits"}, + {"ipv6_addresses", T_OBJECT_EX, offsetof(etherinfo_py, data), 0, + "Returns a list of associated IPv6 addresses"}, {NULL} /* End of member list */ }; diff --git a/python-ethtool/etherinfo_struct.h b/python-ethtool/etherinfo_struct.h index b09b49c..8f9e2e5 100644 --- a/python-ethtool/etherinfo_struct.h +++ b/python-ethtool/etherinfo_struct.h @@ -18,8 +18,14 @@ struct etherinfo { char *ipv4_address; int ipv4_netmask; char *ipv4_broadcast; - char *ipv6_address; - int ipv6_netmask; + struct ipv6address *ipv6_addresses; +}; + +struct ipv6address { + char *address; + int netmask; + int scope; + struct ipv6address *next; }; /* @@ -45,4 +51,19 @@ typedef struct { struct etherinfo_obj_data *data; } etherinfo_py; + +typedef struct { + PyObject_HEAD + struct ipv6address *addrdata; +} etherinfo_ipv6_py; + +/** + * NULL safe PyString_FromString() wrapper. If input string is NULL, None will be returned + * + * @param str Input C string (char *) + * + * @return Returns a PyObject with either the input string wrapped up, or a Python None value. + */ +#define RETURN_STRING(str) (str ? PyString_FromString(str) : Py_None) + #endif diff --git a/python-ethtool/ethtool.c b/python-ethtool/ethtool.c index c6a9af4..7115fb0 100644 --- a/python-ethtool/ethtool.c +++ b/python-ethtool/ethtool.c @@ -32,6 +32,7 @@ static struct _nlconnection nlconnection; extern PyTypeObject ethtool_etherinfoType; +extern PyTypeObject ethtool_etherinfoIPv6Type; #ifndef IFF_DYNAMIC #define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses*/ @@ -1025,6 +1026,12 @@ PyMODINIT_FUNC initethtool(void) Py_INCREF(ðtool_etherinfoType); PyModule_AddObject(m, "etherinfo", (PyObject *)ðtool_etherinfoType); + // Prepare the ethtool.etherinfo_ipv6addr class + if (PyType_Ready(ðtool_etherinfoIPv6Type) < 0) + return; + Py_INCREF(ðtool_etherinfoIPv6Type); + PyModule_AddObject(m, "etherinfo_ipv6addr", (PyObject *)ðtool_etherinfoIPv6Type); + // Prepare an internal netlink connection object if( open_netlink(&nlconnection) ) { PyModule_AddObject(m, "__nlconnection", @@ -59,7 +59,8 @@ setup(name='ethtool', sources = [ 'python-ethtool/ethtool.c', 'python-ethtool/etherinfo.c', - 'python-ethtool/etherinfo_obj.c'], + 'python-ethtool/etherinfo_obj.c', + 'python-ethtool/etherinfo_ipv6_obj.c'], include_dirs = libnl['include'], library_dirs = libnl['libdirs'], libraries = libnl['libs'] |