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socketmodule.c
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3859 lines (3440 loc) · 94.6 KB
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/* Socket module */
/* SSL support based on patches by Brian E Gallew and Laszlo Kovacs */
/*
This module provides an interface to Berkeley socket IPC.
Limitations:
- only AF_INET, AF_INET6 and AF_UNIX address families are supported in a
portable manner, though AF_PACKET is supported under Linux.
- no read/write operations (use sendall/recv or makefile instead)
- additional restrictions apply on Windows (compensated for by socket.py)
Module interface:
- socket.error: exception raised for socket specific errors
- socket.gaierror: exception raised for getaddrinfo/getnameinfo errors,
a subclass of socket.error
- socket.herror: exception raised for gethostby* errors,
a subclass of socket.error
- socket.gethostbyname(hostname) --> host IP address (string: 'dd.dd.dd.dd')
- socket.gethostbyaddr(IP address) --> (hostname, [alias, ...], [IP addr, ...])
- socket.gethostname() --> host name (string: 'spam' or 'spam.domain.com')
- socket.getprotobyname(protocolname) --> protocol number
- socket.getservbyname(servicename, protocolname) --> port number
- socket.socket(family, type [, proto]) --> new socket object
- socket.ntohs(16 bit value) --> new int object
- socket.ntohl(32 bit value) --> new int object
- socket.htons(16 bit value) --> new int object
- socket.htonl(32 bit value) --> new int object
- socket.getaddrinfo(host, port [, family, socktype, proto, flags])
--> List of (family, socktype, proto, canonname, sockaddr)
- socket.getnameinfo(sockaddr, flags) --> (host, port)
- socket.AF_INET, socket.SOCK_STREAM, etc.: constants from <socket.h>
- socket.inet_aton(IP address) -> 32-bit packed IP representation
- socket.inet_ntoa(packed IP) -> IP address string
- socket.ssl(socket, keyfile, certfile) -> new ssl object
- an Internet socket address is a pair (hostname, port)
where hostname can be anything recognized by gethostbyname()
(including the dd.dd.dd.dd notation) and port is in host byte order
- where a hostname is returned, the dd.dd.dd.dd notation is used
- a UNIX domain socket address is a string specifying the pathname
- an AF_PACKET socket address is a tuple containing a string
specifying the ethernet interface and an integer specifying
the Ethernet protocol number to be received. For example:
("eth0",0x1234). Optional 3rd,4th,5th elements in the tuple
specify packet-type and ha-type/addr -- these are ignored by
networking code, but accepted since they are returned by the
getsockname() method.
Socket methods:
- s.accept() --> new socket object, sockaddr
- s.bind(sockaddr) --> None
- s.close() --> None
- s.connect(sockaddr) --> None
- s.connect_ex(sockaddr) --> 0 or errno (handy for e.g. async connect)
- s.fileno() --> file descriptor
- s.dup() --> same as socket.fromfd(os.dup(s.fileno(), ...)
- s.getpeername() --> sockaddr
- s.getsockname() --> sockaddr
- s.getsockopt(level, optname[, buflen]) --> int or string
- s.listen(backlog) --> None
- s.makefile([mode[, bufsize]]) --> file object
- s.recv(buflen [,flags]) --> string
- s.recvfrom(buflen [,flags]) --> string, sockaddr
- s.send(string [,flags]) --> nbytes
- s.sendall(string [,flags]) # tries to send everything in a loop
- s.sendto(string, [flags,] sockaddr) --> nbytes
- s.setblocking(0 | 1) --> None
- s.setsockopt(level, optname, value) --> None
- s.shutdown(how) --> None
- repr(s) --> "<socket object, fd=%d, family=%d, type=%d, protocol=%d>"
*/
#include "Python.h"
/* XXX This is a terrible mess of of platform-dependent preprocessor hacks.
I hope some day someone can clean this up please... */
/* Hacks for gethostbyname_r(). On some non-Linux platforms, the configure
script doesn't get this right, so we hardcode some platform checks below.
On the other hand, not all Linux versions agree, so there the settings
computed by the configure script are needed! */
#ifndef linux
#undef HAVE_GETHOSTBYNAME_R_3_ARG
#undef HAVE_GETHOSTBYNAME_R_5_ARG
#undef HAVE_GETHOSTBYNAME_R_6_ARG
#endif
#ifndef WITH_THREAD
#undef HAVE_GETHOSTBYNAME_R
#endif
#ifdef HAVE_GETHOSTBYNAME_R
#if defined(_AIX) || defined(__osf__)
#define HAVE_GETHOSTBYNAME_R_3_ARG
#elif defined(__sun) || defined(__sgi)
#define HAVE_GETHOSTBYNAME_R_5_ARG
#elif defined(linux)
/* Rely on the configure script */
#else
#undef HAVE_GETHOSTBYNAME_R
#endif
#endif
#if !defined(HAVE_GETHOSTBYNAME_R) && defined(WITH_THREAD) && !defined(MS_WINDOWS)
#define USE_GETHOSTBYNAME_LOCK
#endif
#ifdef USE_GETHOSTBYNAME_LOCK
#include "pythread.h"
#endif
#if defined(PYCC_VACPP)
#include <types.h>
#include <io.h>
#include <sys/ioctl.h>
#include <utils.h>
#include <ctype.h>
#endif
#if defined(PYOS_OS2)
#define INCL_DOS
#define INCL_DOSERRORS
#define INCL_NOPMAPI
#include <os2.h>
#endif
#include <sys/types.h>
#include <signal.h>
#ifndef MS_WINDOWS
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#if !(defined(__BEOS__) || defined(__CYGWIN__) || (defined(PYOS_OS2) && defined(PYCC_VACPP)))
#include <netinet/tcp.h>
#endif
/* This declaration is required for HPUX 10 */
#if defined(__hpux) && !defined(h_errno)
extern int h_errno;
#endif
/* Headers needed for inet_ntoa() and inet_addr() */
#ifdef __BEOS__
#include <net/netdb.h>
#elif defined(PYOS_OS2) && defined(PYCC_VACPP)
#include <netdb.h>
typedef size_t socklen_t;
#else
#ifndef USE_GUSI1
#include <arpa/inet.h>
#endif
#endif
#ifndef RISCOS
#include <fcntl.h>
#else
#include <sys/fcntl.h>
#define NO_DUP
int h_errno; /* not used */
#endif
#else
#include <winsock.h>
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#else
#undef AF_UNIX
#endif
#ifdef HAVE_NETPACKET_PACKET_H
#include <sys/ioctl.h>
#include <net/if.h>
#include <netpacket/packet.h>
#endif
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
#ifndef O_NDELAY
#define O_NDELAY O_NONBLOCK /* For QNX only? */
#endif
#ifdef USE_GUSI1
/* fdopen() isn't declared in stdio.h (sigh) */
#include <GUSI.h>
#endif
#include "addrinfo.h"
#ifdef USE_SSL
#include "openssl/rsa.h"
#include "openssl/crypto.h"
#include "openssl/x509.h"
#include "openssl/pem.h"
#include "openssl/ssl.h"
#include "openssl/err.h"
#include "openssl/rand.h"
#endif /* USE_SSL */
#ifndef HAVE_INET_PTON
int inet_pton (int af, const char *src, void *dst);
const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
#endif
#ifdef __APPLE__
/* On OS X, getaddrinfo returns no error indication of lookup
failure, so we must use the emulation instead of the libinfo
implementation. Unfortunately, performing an autoconf test
for this bug would require DNS access for the machine performing
the configuration, which is not acceptable. Therefore, we
determine the bug just by checking for __APPLE__. If this bug
gets ever fixed, perhaps checking for sys/version.h would be
appropriate, which is 10/0 on the system with the bug. */
#ifndef HAVE_GETNAMEINFO
/* This bug seems to be fixed in Jaguar. Ths easiest way I could
Find to check for Jaguar is that it has getnameinfo(), which
older releases don't have */
#undef HAVE_GETADDRINFO
/* avoid clashes with the C library definition of the symbol. */
#define getaddrinfo fake_getaddrinfo
#endif
#endif
/* I know this is a bad practice, but it is the easiest... */
#if !defined(HAVE_GETADDRINFO)
#include "getaddrinfo.c"
#endif
#if !defined(HAVE_GETNAMEINFO)
#include "getnameinfo.c"
#endif
#if defined(MS_WINDOWS) || defined(__BEOS__)
/* BeOS suffers from the same socket dichotomy as Win32... - [cjh] */
/* seem to be a few differences in the API */
#define SOCKETCLOSE closesocket
#define NO_DUP /* Actually it exists on NT 3.5, but what the heck... */
#endif
/* abstract the socket file descriptor type */
#ifdef MS_WINDOWS
typedef SOCKET SOCKET_T;
# ifdef MS_WIN64
# define SIZEOF_SOCKET_T 8
# else
# define SIZEOF_SOCKET_T 4
# endif
#else
typedef int SOCKET_T;
# define SIZEOF_SOCKET_T SIZEOF_INT
#endif
#ifdef MS_WIN32
# define EAFNOSUPPORT WSAEAFNOSUPPORT
# define snprintf _snprintf
#endif
#if defined(PYOS_OS2)
#define SOCKETCLOSE soclose
#define NO_DUP /* Sockets are Not Actual File Handles under OS/2 */
#endif
#ifndef SOCKETCLOSE
#define SOCKETCLOSE close
#endif
/* XXX There's a problem here: *static* functions are not supposed to have
a Py prefix (or use CapitalizedWords). Later... */
/* Global variable holding the exception type for errors detected
by this module (but not argument type or memory errors, etc.). */
static PyObject *PySocket_Error;
static PyObject *PyH_Error;
static PyObject *PyGAI_Error;
#ifdef USE_SSL
static PyObject *PySSLErrorObject;
enum py_ssl_error {
/* these mirror ssl.h */
PY_SSL_ERROR_NONE,
PY_SSL_ERROR_SSL,
PY_SSL_ERROR_WANT_READ,
PY_SSL_ERROR_WANT_WRITE,
PY_SSL_ERROR_WANT_X509_LOOKUP,
PY_SSL_ERROR_SYSCALL, /* look at error stack/return value/errno */
PY_SSL_ERROR_ZERO_RETURN,
PY_SSL_ERROR_WANT_CONNECT,
/* start of non ssl.h errorcodes */
PY_SSL_ERROR_EOF, /* special case of SSL_ERROR_SYSCALL */
PY_SSL_ERROR_INVALID_ERROR_CODE
};
#endif /* USE_SSL */
#ifdef RISCOS
/* Global variable which is !=0 if Python is running in a RISC OS taskwindow */
static int taskwindow;
#endif
/* Convenience function to raise an error according to errno
and return a NULL pointer from a function. */
static PyObject *
PySocket_Err(void)
{
#ifdef MS_WINDOWS
int err_no = WSAGetLastError();
if (err_no) {
static struct { int no; const char *msg; } *msgp, msgs[] = {
{ WSAEINTR, "Interrupted system call" },
{ WSAEBADF, "Bad file descriptor" },
{ WSAEACCES, "Permission denied" },
{ WSAEFAULT, "Bad address" },
{ WSAEINVAL, "Invalid argument" },
{ WSAEMFILE, "Too many open files" },
{ WSAEWOULDBLOCK,
"The socket operation could not complete "
"without blocking" },
{ WSAEINPROGRESS, "Operation now in progress" },
{ WSAEALREADY, "Operation already in progress" },
{ WSAENOTSOCK, "Socket operation on non-socket" },
{ WSAEDESTADDRREQ, "Destination address required" },
{ WSAEMSGSIZE, "Message too long" },
{ WSAEPROTOTYPE, "Protocol wrong type for socket" },
{ WSAENOPROTOOPT, "Protocol not available" },
{ WSAEPROTONOSUPPORT, "Protocol not supported" },
{ WSAESOCKTNOSUPPORT, "Socket type not supported" },
{ WSAEOPNOTSUPP, "Operation not supported" },
{ WSAEPFNOSUPPORT, "Protocol family not supported" },
{ WSAEAFNOSUPPORT, "Address family not supported" },
{ WSAEADDRINUSE, "Address already in use" },
{ WSAEADDRNOTAVAIL,
"Can't assign requested address" },
{ WSAENETDOWN, "Network is down" },
{ WSAENETUNREACH, "Network is unreachable" },
{ WSAENETRESET,
"Network dropped connection on reset" },
{ WSAECONNABORTED,
"Software caused connection abort" },
{ WSAECONNRESET, "Connection reset by peer" },
{ WSAENOBUFS, "No buffer space available" },
{ WSAEISCONN, "Socket is already connected" },
{ WSAENOTCONN, "Socket is not connected" },
{ WSAESHUTDOWN, "Can't send after socket shutdown" },
{ WSAETOOMANYREFS,
"Too many references: can't splice" },
{ WSAETIMEDOUT, "Operation timed out" },
{ WSAECONNREFUSED, "Connection refused" },
{ WSAELOOP, "Too many levels of symbolic links" },
{ WSAENAMETOOLONG, "File name too long" },
{ WSAEHOSTDOWN, "Host is down" },
{ WSAEHOSTUNREACH, "No route to host" },
{ WSAENOTEMPTY, "Directory not empty" },
{ WSAEPROCLIM, "Too many processes" },
{ WSAEUSERS, "Too many users" },
{ WSAEDQUOT, "Disc quota exceeded" },
{ WSAESTALE, "Stale NFS file handle" },
{ WSAEREMOTE, "Too many levels of remote in path" },
{ WSASYSNOTREADY,
"Network subsystem is unvailable" },
{ WSAVERNOTSUPPORTED,
"WinSock version is not supported" },
{ WSANOTINITIALISED,
"Successful WSAStartup() not yet performed" },
{ WSAEDISCON, "Graceful shutdown in progress" },
/* Resolver errors */
{ WSAHOST_NOT_FOUND, "No such host is known" },
{ WSATRY_AGAIN, "Host not found, or server failed" },
{ WSANO_RECOVERY,
"Unexpected server error encountered" },
{ WSANO_DATA, "Valid name without requested data" },
{ WSANO_ADDRESS, "No address, look for MX record" },
{ 0, NULL }
};
PyObject *v;
const char *msg = "winsock error";
for (msgp = msgs; msgp->msg; msgp++) {
if (err_no == msgp->no) {
msg = msgp->msg;
break;
}
}
v = Py_BuildValue("(is)", err_no, msg);
if (v != NULL) {
PyErr_SetObject(PySocket_Error, v);
Py_DECREF(v);
}
return NULL;
}
else
#endif
#if defined(PYOS_OS2)
if (sock_errno() != NO_ERROR) {
APIRET rc;
ULONG msglen;
char outbuf[100];
int myerrorcode = sock_errno();
/* Retrieve Socket-Related Error Message from MPTN.MSG File */
rc = DosGetMessage(NULL, 0, outbuf, sizeof(outbuf),
myerrorcode - SOCBASEERR + 26, "mptn.msg", &msglen);
if (rc == NO_ERROR) {
PyObject *v;
outbuf[msglen] = '\0'; /* OS/2 Doesn't Guarantee a Terminator */
if (strlen(outbuf) > 0) { /* If Non-Empty Msg, Trim CRLF */
char *lastc = &outbuf[ strlen(outbuf)-1 ];
while (lastc > outbuf && isspace(*lastc))
*lastc-- = '\0'; /* Trim Trailing Whitespace (CRLF) */
}
v = Py_BuildValue("(is)", myerrorcode, outbuf);
if (v != NULL) {
PyErr_SetObject(PySocket_Error, v);
Py_DECREF(v);
}
return NULL;
}
}
#endif
return PyErr_SetFromErrno(PySocket_Error);
}
static PyObject *
PyH_Err(int h_error)
{
PyObject *v;
#ifdef HAVE_HSTRERROR
v = Py_BuildValue("(is)", h_error, (char *)hstrerror(h_error));
#else
v = Py_BuildValue("(is)", h_error, "host not found");
#endif
if (v != NULL) {
PyErr_SetObject(PyH_Error, v);
Py_DECREF(v);
}
return NULL;
}
static PyObject *
PyGAI_Err(int error)
{
PyObject *v;
if (error == EAI_SYSTEM)
return PySocket_Err();
#ifdef HAVE_GAI_STRERROR
v = Py_BuildValue("(is)", error, gai_strerror(error));
#else
v = Py_BuildValue("(is)", error, "getaddrinfo failed");
#endif
if (v != NULL) {
PyErr_SetObject(PyGAI_Error, v);
Py_DECREF(v);
}
return NULL;
}
/* The object holding a socket. It holds some extra information,
like the address family, which is used to decode socket address
arguments properly. */
typedef struct {
PyObject_HEAD
SOCKET_T sock_fd; /* Socket file descriptor */
int sock_family; /* Address family, e.g., AF_INET */
int sock_type; /* Socket type, e.g., SOCK_STREAM */
int sock_proto; /* Protocol type, usually 0 */
union sock_addr {
struct sockaddr_in in;
#ifdef AF_UNIX
struct sockaddr_un un;
#endif
#ifdef ENABLE_IPV6
struct sockaddr_in6 in6;
struct sockaddr_storage storage;
#endif
#ifdef HAVE_NETPACKET_PACKET_H
struct sockaddr_ll ll;
#endif
} sock_addr;
} PySocketSockObject;
#ifdef USE_SSL
#define X509_NAME_MAXLEN 256
typedef struct {
PyObject_HEAD
PySocketSockObject *Socket; /* Socket on which we're layered */
SSL_CTX* ctx;
SSL* ssl;
X509* server_cert;
BIO* sbio;
char server[X509_NAME_MAXLEN];
char issuer[X509_NAME_MAXLEN];
} PySSLObject;
staticforward PyTypeObject PySSL_Type;
staticforward PyObject *PySSL_SSLwrite(PySSLObject *self, PyObject *args);
staticforward PyObject *PySSL_SSLread(PySSLObject *self, PyObject *args);
#define PySSLObject_Check(v) ((v)->ob_type == &PySSL_Type)
#endif /* USE_SSL */
/* A forward reference to the Socktype type object.
The Socktype variable contains pointers to various functions,
some of which call newsockobject(), which uses Socktype, so
there has to be a circular reference. */
staticforward PyTypeObject PySocketSock_Type;
/* Initialize a new socket object. */
static void
init_sockobject(PySocketSockObject *s,
SOCKET_T fd, int family, int type, int proto)
{
#ifdef RISCOS
int block = 1;
#endif
s->sock_fd = fd;
s->sock_family = family;
s->sock_type = type;
s->sock_proto = proto;
#ifdef RISCOS
if(taskwindow) {
socketioctl(s->sock_fd, 0x80046679, (u_long*)&block);
}
#endif
}
/* Create a new socket object.
This just creates the object and initializes it.
If the creation fails, return NULL and set an exception (implicit
in NEWOBJ()). */
static PySocketSockObject *
PySocketSock_New(SOCKET_T fd, int family, int type, int proto)
{
PySocketSockObject *s;
s = (PySocketSockObject *)
PyType_GenericNew(&PySocketSock_Type, NULL, NULL);
if (s != NULL)
init_sockobject(s, fd, family, type, proto);
return s;
}
/* Lock to allow python interpreter to continue, but only allow one
thread to be in gethostbyname */
#ifdef USE_GETHOSTBYNAME_LOCK
PyThread_type_lock gethostbyname_lock;
#endif
/* Convert a string specifying a host name or one of a few symbolic
names to a numeric IP address. This usually calls gethostbyname()
to do the work; the names "" and "<broadcast>" are special.
Return the length (IPv4 should be 4 bytes), or negative if
an error occurred; then an exception is raised. */
static int
setipaddr(char* name, struct sockaddr * addr_ret, size_t addr_ret_size, int af)
{
struct addrinfo hints, *res;
int error;
memset((void *) addr_ret, '\0', sizeof(*addr_ret));
if (name[0] == '\0') {
int siz;
memset(&hints, 0, sizeof(hints));
hints.ai_family = af;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
hints.ai_flags = AI_PASSIVE;
error = getaddrinfo(NULL, "0", &hints, &res);
if (error) {
PyGAI_Err(error);
return -1;
}
switch (res->ai_family) {
case AF_INET:
siz = 4;
break;
#ifdef ENABLE_IPV6
case AF_INET6:
siz = 16;
break;
#endif
default:
freeaddrinfo(res);
PyErr_SetString(PySocket_Error,
"unsupported address family");
return -1;
}
if (res->ai_next) {
freeaddrinfo(res);
PyErr_SetString(PySocket_Error,
"wildcard resolved to multiple address");
return -1;
}
if (res->ai_addrlen < addr_ret_size)
addr_ret_size = res->ai_addrlen;
memcpy(addr_ret, res->ai_addr, addr_ret_size);
freeaddrinfo(res);
return siz;
}
if (name[0] == '<' && strcmp(name, "<broadcast>") == 0) {
struct sockaddr_in *sin;
if (af != PF_INET && af != PF_UNSPEC) {
PyErr_SetString(PySocket_Error,
"address family mismatched");
return -1;
}
sin = (struct sockaddr_in *)addr_ret;
memset((void *) sin, '\0', sizeof(*sin));
sin->sin_family = AF_INET;
#ifdef HAVE_SOCKADDR_SA_LEN
sin->sin_len = sizeof(*sin);
#endif
sin->sin_addr.s_addr = INADDR_BROADCAST;
return sizeof(sin->sin_addr);
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = af;
error = getaddrinfo(name, NULL, &hints, &res);
#if defined(__digital__) && defined(__unix__)
if (error == EAI_NONAME && af == AF_UNSPEC) {
/* On Tru64 V5.1, numeric-to-addr conversion
fails if no address family is given. Assume IPv4 for now.*/
hints.ai_family = AF_INET;
error = getaddrinfo(name, NULL, &hints, &res);
}
#endif
if (error) {
PyGAI_Err(error);
return -1;
}
if (res->ai_addrlen < addr_ret_size)
addr_ret_size = res->ai_addrlen;
memcpy((char *) addr_ret, res->ai_addr, addr_ret_size);
freeaddrinfo(res);
switch (addr_ret->sa_family) {
case AF_INET:
return 4;
#ifdef ENABLE_IPV6
case AF_INET6:
return 16;
#endif
default:
PyErr_SetString(PySocket_Error, "unknown address family");
return -1;
}
}
/* Create a string object representing an IP address.
This is always a string of the form 'dd.dd.dd.dd' (with variable
size numbers). */
static PyObject *
makeipaddr(struct sockaddr *addr, int addrlen)
{
char buf[NI_MAXHOST];
int error;
error = getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0,
NI_NUMERICHOST);
if (error) {
PyGAI_Err(error);
return NULL;
}
return PyString_FromString(buf);
}
/* Create an object representing the given socket address,
suitable for passing it back to bind(), connect() etc.
The family field of the sockaddr structure is inspected
to determine what kind of address it really is. */
/*ARGSUSED*/
static PyObject *
makesockaddr(int sockfd, struct sockaddr *addr, int addrlen)
{
if (addrlen == 0) {
/* No address -- may be recvfrom() from known socket */
Py_INCREF(Py_None);
return Py_None;
}
#ifdef __BEOS__
/* XXX: BeOS version of accept() doesn't set family correctly */
addr->sa_family = AF_INET;
#endif
switch (addr->sa_family) {
case AF_INET:
{
struct sockaddr_in *a;
PyObject *addrobj = makeipaddr(addr, sizeof(*a));
PyObject *ret = NULL;
if (addrobj) {
a = (struct sockaddr_in *)addr;
ret = Py_BuildValue("Oi", addrobj, ntohs(a->sin_port));
Py_DECREF(addrobj);
}
return ret;
}
#ifdef AF_UNIX
case AF_UNIX:
{
struct sockaddr_un *a = (struct sockaddr_un *) addr;
return PyString_FromString(a->sun_path);
}
#endif /* AF_UNIX */
#ifdef ENABLE_IPV6
case AF_INET6:
{
struct sockaddr_in6 *a;
PyObject *addrobj = makeipaddr(addr, sizeof(*a));
PyObject *ret = NULL;
if (addrobj) {
a = (struct sockaddr_in6 *)addr;
ret = Py_BuildValue("Oiii", addrobj, ntohs(a->sin6_port),
a->sin6_flowinfo, a->sin6_scope_id);
Py_DECREF(addrobj);
}
return ret;
}
#endif
#ifdef HAVE_NETPACKET_PACKET_H
case AF_PACKET:
{
struct sockaddr_ll *a = (struct sockaddr_ll *)addr;
char *ifname = "";
struct ifreq ifr;
/* need to look up interface name give index */
if (a->sll_ifindex) {
ifr.ifr_ifindex = a->sll_ifindex;
if (ioctl(sockfd, SIOCGIFNAME, &ifr) == 0)
ifname = ifr.ifr_name;
}
return Py_BuildValue("shbhs#", ifname, ntohs(a->sll_protocol),
a->sll_pkttype, a->sll_hatype,
a->sll_addr, a->sll_halen);
}
#endif
/* More cases here... */
default:
/* If we don't know the address family, don't raise an
exception -- return it as a tuple. */
return Py_BuildValue("is#",
addr->sa_family,
addr->sa_data,
sizeof(addr->sa_data));
}
}
/* Parse a socket address argument according to the socket object's
address family. Return 1 if the address was in the proper format,
0 of not. The address is returned through addr_ret, its length
through len_ret. */
static int
getsockaddrarg(PySocketSockObject *s, PyObject *args,
struct sockaddr **addr_ret, int *len_ret)
{
switch (s->sock_family) {
#ifdef AF_UNIX
case AF_UNIX:
{
struct sockaddr_un* addr;
char *path;
int len;
addr = (struct sockaddr_un* )&(s->sock_addr).un;
if (!PyArg_Parse(args, "t#", &path, &len))
return 0;
if (len > sizeof addr->sun_path) {
PyErr_SetString(PySocket_Error,
"AF_UNIX path too long");
return 0;
}
addr->sun_family = s->sock_family;
memcpy(addr->sun_path, path, len);
addr->sun_path[len] = 0;
*addr_ret = (struct sockaddr *) addr;
*len_ret = len + sizeof(*addr) - sizeof(addr->sun_path);
return 1;
}
#endif /* AF_UNIX */
case AF_INET:
{
struct sockaddr_in* addr;
char *host;
int port;
addr=(struct sockaddr_in*)&(s->sock_addr).in;
if (!PyTuple_Check(args)) {
PyErr_Format(PyExc_TypeError,
"getsockaddrarg: AF_INET address must be tuple, not %.500s",
args->ob_type->tp_name);
return 0;
}
if (!PyArg_ParseTuple(args, "si:getsockaddrarg", &host, &port))
return 0;
if (setipaddr(host, (struct sockaddr *)addr, sizeof(*addr), AF_INET) < 0)
return 0;
addr->sin_family = AF_INET;
addr->sin_port = htons((short)port);
*addr_ret = (struct sockaddr *) addr;
*len_ret = sizeof *addr;
return 1;
}
#ifdef ENABLE_IPV6
case AF_INET6:
{
struct sockaddr_in6* addr;
char *host;
int port, flowinfo, scope_id;
addr = (struct sockaddr_in6*)&(s->sock_addr).in6;
flowinfo = scope_id = 0;
if (!PyArg_ParseTuple(args, "si|ii", &host, &port, &flowinfo,
&scope_id)) {
return 0;
}
if (setipaddr(host, (struct sockaddr *)addr, sizeof(*addr), AF_INET6) < 0)
return 0;
addr->sin6_family = s->sock_family;
addr->sin6_port = htons((short)port);
addr->sin6_flowinfo = flowinfo;
addr->sin6_scope_id = scope_id;
*addr_ret = (struct sockaddr *) addr;
*len_ret = sizeof *addr;
return 1;
}
#endif
#ifdef HAVE_NETPACKET_PACKET_H
case AF_PACKET:
{
struct sockaddr_ll* addr;
struct ifreq ifr;
char *interfaceName;
int protoNumber;
int hatype = 0;
int pkttype = 0;
char *haddr;
if (!PyArg_ParseTuple(args, "si|iis", &interfaceName,
&protoNumber, &pkttype, &hatype, &haddr))
return 0;
strncpy(ifr.ifr_name, interfaceName, sizeof(ifr.ifr_name));
ifr.ifr_name[(sizeof(ifr.ifr_name))-1] = '\0';
if (ioctl(s->sock_fd, SIOCGIFINDEX, &ifr) < 0) {
PySocket_Err();
return 0;
}
addr = &(s->sock_addr.ll);
addr->sll_family = AF_PACKET;
addr->sll_protocol = htons((short)protoNumber);
addr->sll_ifindex = ifr.ifr_ifindex;
addr->sll_pkttype = pkttype;
addr->sll_hatype = hatype;
*addr_ret = (struct sockaddr *) addr;
*len_ret = sizeof *addr;
return 1;
}
#endif
/* More cases here... */
default:
PyErr_SetString(PySocket_Error, "getsockaddrarg: bad family");
return 0;
}
}
/* Get the address length according to the socket object's address family.
Return 1 if the family is known, 0 otherwise. The length is returned
through len_ret. */
static int
getsockaddrlen(PySocketSockObject *s, socklen_t *len_ret)
{
switch (s->sock_family) {
#ifdef AF_UNIX
case AF_UNIX:
{
*len_ret = sizeof (struct sockaddr_un);
return 1;
}
#endif /* AF_UNIX */
case AF_INET:
{
*len_ret = sizeof (struct sockaddr_in);
return 1;
}
#ifdef ENABLE_IPV6
case AF_INET6:
{
*len_ret = sizeof (struct sockaddr_in6);
return 1;
}
#endif
#ifdef HAVE_NETPACKET_PACKET_H
case AF_PACKET:
{
*len_ret = sizeof (struct sockaddr_ll);
return 1;
}
#endif
/* More cases here... */
default:
PyErr_SetString(PySocket_Error, "getsockaddrlen: bad family");
return 0;
}
}
/* s.accept() method */
static PyObject *
PySocketSock_accept(PySocketSockObject *s)
{
char addrbuf[256];
SOCKET_T newfd;
socklen_t addrlen;
PyObject *sock = NULL;
PyObject *addr = NULL;
PyObject *res = NULL;
if (!getsockaddrlen(s, &addrlen))
return NULL;
memset(addrbuf, 0, addrlen);
Py_BEGIN_ALLOW_THREADS
newfd = accept(s->sock_fd, (struct sockaddr *) addrbuf, &addrlen);
Py_END_ALLOW_THREADS
#ifdef MS_WINDOWS
if (newfd == INVALID_SOCKET)
#else
if (newfd < 0)
#endif
return PySocket_Err();
/* Create the new object with unspecified family,
to avoid calls to bind() etc. on it. */
sock = (PyObject *) PySocketSock_New(newfd,
s->sock_family,