src/win32/winsock.c

   1 /*****************************************************************************
   2  * winsock.c: POSIX replacements for Winsock
   3  *****************************************************************************
   4  * Copyright © 2006-2008 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_common.h>
  26 #include <errno.h>
  27 #include <vlc_network.h>
  28
  29 #ifndef WSA_QOS_EUNKNOWNPSOBJ
  30 # define WSA_QOS_EUNKNOWNPSOBJ 11024L
  31 #endif
  32
  33 typedef struct
  34 {
  35     int code;
  36     const char *msg;
  37 } wsaerrmsg_t;
  38
  39 static const wsaerrmsg_t wsaerrmsg[] =
  40 {
  41     { WSA_INVALID_HANDLE, "Specified event object handle is invalid" },
  42     { WSA_NOT_ENOUGH_MEMORY, "Insufficient memory available" },
  43     { WSA_INVALID_PARAMETER, "One or more parameters are invalid" },
  44     { WSA_OPERATION_ABORTED, "Overlapped operation aborted" },
  45     { WSA_IO_INCOMPLETE, "Overlapped I/O event object not in signaled state" },
  46     { WSA_IO_PENDING, "Overlapped operations will complete later" },
  47     { WSAEINTR, "Interrupted function call" },
  48     { WSAEBADF, "File handle is not valid" },
  49     { WSAEACCES, "Access denied" },
  50     { WSAEFAULT, "Invalid memory address" },
  51     { WSAEINVAL, "Invalid argument" },
  52     { WSAEMFILE, "Too many open sockets" },
  53     { WSAEWOULDBLOCK, "Resource temporarily unavailable" },
  54     { WSAEINPROGRESS, "Operation now in progress" },
  55     { WSAEALREADY, "Operation already in progress" },
  56     { WSAENOTSOCK, "Non-socket handle specified" },
  57     { WSAEDESTADDRREQ, "Missing destination address" },
  58     { WSAEMSGSIZE, "Message too long" },
  59     { WSAEPROTOTYPE, "Protocol wrong type for socket", },
  60     { WSAENOPROTOOPT, "Option not supported by protocol" },
  61     { WSAEPROTONOSUPPORT, "Protocol not supported" },
  62     { WSAESOCKTNOSUPPORT, "Socket type not supported" },
  63     { WSAEOPNOTSUPP, "Operation not supported" },
  64     { WSAEPFNOSUPPORT, "Protocol family not supported" },
  65     { WSAEAFNOSUPPORT, "Address family not supported by protocol family" },
  66     { WSAEADDRINUSE, "Address already in use" },
  67     { WSAEADDRNOTAVAIL, "Cannot assign requested address" },
  68     { WSAENETDOWN, "Network is down" },
  69     { WSAENETUNREACH, "Network unreachable" },
  70     { WSAENETRESET, "Network dropped connection on reset" },
  71     { WSAECONNABORTED, "Software caused connection abort" },
  72     { WSAECONNRESET, "Connection reset by peer" },
  73     { WSAENOBUFS, "No buffer space available (not enough memory)" },
  74     { WSAEISCONN, "Socket is already connected" },
  75     { WSAENOTCONN, "Socket is not connected" },
  76     { WSAESHUTDOWN, "Cannot send after socket shutdown" },
  77     { WSAETOOMANYREFS, "Too many references" },
  78     { WSAETIMEDOUT, "Connection timed out" },
  79     { WSAECONNREFUSED, "Connection refused by peer" },
  80     { WSAELOOP, "Cannot translate name" },
  81     { WSAENAMETOOLONG, "Name too long" },
  82     { WSAEHOSTDOWN, "Remote host is down" },
  83     { WSAEHOSTUNREACH, "No route to host (unreachable)" },
  84     { WSAENOTEMPTY, "Directory not empty" },
  85     { WSAEPROCLIM, "Too many processes" },
  86     { WSAEUSERS, "User quota exceeded" },
  87     { WSAEDQUOT, "Disk quota exceeded" },
  88     { WSAESTALE, "Stale file handle reference" },
  89     { WSAEREMOTE, "Item is remote", },
  90     { WSASYSNOTREADY, "Network subsystem is unavailable (network stack not ready)" },
  91     { WSAVERNOTSUPPORTED, "Winsock.dll version out of range (network stack version not supported" },
  92     { WSANOTINITIALISED, "Network not initialized" },
  93     { WSAEDISCON, "Graceful shutdown in progress" },
  94     { WSAENOMORE, "No more results" },
  95     { WSAECANCELLED, "Call has been cancelled" },
  96     { WSAEINVALIDPROCTABLE, "Procedure call table is invalid" },
  97     { WSAEINVALIDPROVIDER, "Service provider is invalid" },
  98     { WSAEPROVIDERFAILEDINIT, "Service provider failed to initialize" },
  99     { WSASYSCALLFAILURE, "System call failure" },
 100     { WSASERVICE_NOT_FOUND, "Service not found" },
 101     { WSATYPE_NOT_FOUND, "Class type not found" },
 102     { WSA_E_NO_MORE, "No more results" },
 103     { WSA_E_CANCELLED, "Call was cancelled" },
 104     { WSAEREFUSED, "Database query was refused" },
 105     { WSAHOST_NOT_FOUND, "Host not found" },
 106     { WSATRY_AGAIN, "Nonauthoritative host not found (temporary hostname error)" },
 107     { WSANO_RECOVERY, "Non-recoverable hostname error" },
 108     { WSANO_DATA, "Valid name, no data record of requested type" },
 109     { WSA_QOS_RECEIVERS, "QOS receivers" },
 110     { WSA_QOS_SENDERS, "QOS senders" },
 111     { WSA_QOS_NO_SENDERS, "No QOS senders" },
 112     { WSA_QOS_NO_RECEIVERS, "QOS no receivers" },
 113     { WSA_QOS_REQUEST_CONFIRMED, "QOS request confirmed" },
 114     { WSA_QOS_ADMISSION_FAILURE, "QOS admission error" },
 115     { WSA_QOS_POLICY_FAILURE, "QOS policy failure" },
 116     { WSA_QOS_BAD_STYLE, "QOS bad style" },
 117     { WSA_QOS_BAD_OBJECT, "QOS bad object" },
 118     { WSA_QOS_TRAFFIC_CTRL_ERROR, "QOS traffic control error" },
 119     { WSA_QOS_GENERIC_ERROR, "QOS generic error" },
 120     { WSA_QOS_ESERVICETYPE, "QOS service type error" },
 121     { WSA_QOS_EFLOWSPEC, "QOS flowspec error" },
 122     { WSA_QOS_EPROVSPECBUF, "Invalid QOS provider buffer" },
 123     { WSA_QOS_EFILTERSTYLE, "Invalid QOS filter style" },
 124     { WSA_QOS_EFILTERTYPE, "Invalid QOS filter type" },
 125     { WSA_QOS_EFILTERCOUNT, "Incorrect QOS filter count" },
 126     { WSA_QOS_EOBJLENGTH, "Invalid QOS object length" },
 127     { WSA_QOS_EFLOWCOUNT, "Incorrect QOS flow count" },
 128     { WSA_QOS_EUNKNOWNPSOBJ, "Unrecognized QOS object" },
 129     { WSA_QOS_EPOLICYOBJ, "Invalid QOS policy object" },
 130     { WSA_QOS_EFLOWDESC, "Invalid QOS flow descriptor" },
 131     { WSA_QOS_EPSFLOWSPEC, "Invalid QOS provider-specific flowspec" },
 132     { WSA_QOS_EPSFILTERSPEC, "Invalid QOS provider-specific filterspec" },
 133     { WSA_QOS_ESDMODEOBJ, "Invalid QOS shape discard mode object" },
 134     { WSA_QOS_ESHAPERATEOBJ, "Invalid QOS shaping rate object" },
 135     { WSA_QOS_RESERVED_PETYPE, "Reserved policy QOS element type" },
 136     { 0, NULL }
 137     /* Winsock2 error codes are missing, they "never" occur */
 138 };
 139
 140
 141 const char *net_strerror( int value )
 142 {
 143     /* There doesn't seem to be any portable error message generation for
 144      * Winsock errors. Some old versions had s_error, but it appears to be
 145      * gone, and is not documented.
 146      */
 147     for( const wsaerrmsg_t *e = wsaerrmsg; e->msg != NULL; e++ )
 148         if( e->code == value )
 149             return e->msg;
 150
 151     /* Remember to update src/misc/messages.c if you change this one */
 152     return "Unknown network stack error";
 153 }
 154
 155 #if 0
 156 ssize_t vlc_sendmsg (int s, struct msghdr *hdr, int flags)
 157 {
 158     /* WSASendMsg would be more straightforward, and would support ancilliary
 159      * data, but it's not yet in mingw32. */
 160     if ((hdr->msg_iovlen > 100) || (hdr->msg_controllen > 0))
 161     {
 162         errno = EINVAL;
 163         return -1;
 164     }
 165
 166     WSABUF buf[hdr->msg_iovlen];
 167     for (size_t i = 0; i < sizeof (buf) / sizeof (buf[0]); i++)
 168         buf[i].buf = hdr->msg_iov[i].iov_base,
 169         buf[i].len = hdr->msg_iov[i].iov_len;
 170
 171     DWORD sent;
 172     if (WSASendTo (s, buf, sizeof (buf) / sizeof (buf[0]), &sent, flags,
 173                    hdr->msg_name, hdr->msg_namelen, NULL, NULL) == 0)
 174         return sent;
 175     return -1;
 176 }
 177
 178 ssize_t vlc_recvmsg (int s, struct msghdr *hdr, int flags)
 179 {
 180     /* WSARecvMsg would be more straightforward, and would support ancilliary
 181      * data, but it's not yet in mingw32. */
 182     if (hdr->msg_iovlen > 100)
 183     {
 184         errno = EINVAL;
 185         return -1;
 186     }
 187
 188     WSABUF buf[hdr->msg_iovlen];
 189     for (size_t i = 0; i < sizeof (buf) / sizeof (buf[0]); i++)
 190         buf[i].buf = hdr->msg_iov[i].iov_base,
 191         buf[i].len = hdr->msg_iov[i].iov_len;
 192
 193     DWORD recvd, dwFlags = flags;
 194     INT fromlen = hdr->msg_namelen;
 195     hdr->msg_controllen = 0;
 196     hdr->msg_flags = 0;
 197
 198     int ret = WSARecvFrom (s, buf, sizeof (buf) / sizeof (buf[0]), &recvd,
 199                            &dwFlags, hdr->msg_name, &fromlen, NULL, NULL);
 200     hdr->msg_namelen = fromlen;
 201     hdr->msg_flags = dwFlags;
 202     if (ret == 0)
 203         return recvd;
 204
 205 #ifdef MSG_TRUNC
 206     if (WSAGetLastError() == WSAEMSGSIZE)
 207     {
 208         hdr->msg_flags |= MSG_TRUNC;
 209         return recvd;
 210     }
 211 #else
 212 # warning Out-of-date Winsock header files!
 213 #endif
 214     return -1;
 215 }
 216 #endif