src/network/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
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 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 General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, 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 typedef struct
  30 {
  31     int code;
  32     const char *msg;
  33 } wsaerrmsg_t;
  34
  35 static const wsaerrmsg_t wsaerrmsg[] =
  36 {
  37     { WSA_INVALID_HANDLE, "Specified event object handle is invalid" },
  38     { WSA_NOT_ENOUGH_MEMORY, "Insufficient memory available" },
  39     { WSA_INVALID_PARAMETER, "One or more parameters are invalid" },
  40     { WSA_OPERATION_ABORTED, "Overlapped operation aborted" },
  41     { WSA_IO_INCOMPLETE, "Overlapped I/O event object not in signaled state" },
  42     { WSA_IO_PENDING, "Overlapped operations will complete later" },
  43     { WSAEINTR, "Interrupted function call" },
  44     { WSAEBADF, "File handle is not valid" },
  45     { WSAEACCES, "Access denied" },
  46     { WSAEFAULT, "Invalid memory address" },
  47     { WSAEINVAL, "Invalid argument" },
  48     { WSAEMFILE, "Too many open sockets" },
  49     { WSAEWOULDBLOCK, "Resource temporarily unavailable" },
  50     { WSAEINPROGRESS, "Operation now in progress" },
  51     { WSAEALREADY, "Operation already in progress" },
  52     { WSAENOTSOCK, "Non-socket handle specified" },
  53     { WSAEDESTADDRREQ, "Missing destination address" },
  54     { WSAEMSGSIZE, "Message too long" },
  55     { WSAEPROTOTYPE, "Protocol wrong type for socket", },
  56     { WSAENOPROTOOPT, "Option not supported by protocol" },
  57     { WSAEPROTONOSUPPORT, "Protocol not supported" },
  58     { WSAESOCKTNOSUPPORT, "Socket type not supported" },
  59     { WSAEOPNOTSUPP, "Operation not supported" },
  60     { WSAEPFNOSUPPORT, "Protocol family not supported" },
  61     { WSAEAFNOSUPPORT, "Address family not supported by protocol family" },
  62     { WSAEADDRINUSE, "Address already in use" },
  63     { WSAEADDRNOTAVAIL, "Cannot assign requested address" },
  64     { WSAENETDOWN, "Network is down" },
  65     { WSAENETUNREACH, "Network unreachable" },
  66     { WSAENETRESET, "Network dropped connection on reset" },
  67     { WSAECONNABORTED, "Software caused connection abort" },
  68     { WSAECONNRESET, "Connection reset by peer" },
  69     { WSAENOBUFS, "No buffer space available (not enough memory)" },
  70     { WSAEISCONN, "Socket is already connected" },
  71     { WSAENOTCONN, "Socket is not connected" },
  72     { WSAESHUTDOWN, "Cannot send after socket shutdown" },
  73     { WSAETOOMANYREFS, "Too many references" },
  74     { WSAETIMEDOUT, "Connection timed out" },
  75     { WSAECONNREFUSED, "Connection refused by peer" },
  76     { WSAELOOP, "Cannot translate name" },
  77     { WSAENAMETOOLONG, "Name too long" },
  78     { WSAEHOSTDOWN, "Remote host is down" },
  79     { WSAEHOSTUNREACH, "No route to host (unreachable)" },
  80     { WSAENOTEMPTY, "Directory not empty" },
  81     { WSAEPROCLIM, "Too many processes" },
  82     { WSAEUSERS, "User quota exceeded" },
  83     { WSAEDQUOT, "Disk quota exceeded" },
  84     { WSAESTALE, "Stale file handle reference" },
  85     { WSAEREMOTE, "Item is remote", },
  86     { WSASYSNOTREADY, "Network subsystem is unavailable (network stack not ready)" },
  87     { WSAVERNOTSUPPORTED, "Winsock.dll version out of range (network stack version not supported" },
  88     { WSANOTINITIALISED, "Network not initialized" },
  89     { WSAEDISCON, "Graceful shutdown in progress" },
  90     { WSAENOMORE, "No more results" },
  91     { WSAECANCELLED, "Call has been cancelled" },
  92     { WSAEINVALIDPROCTABLE, "Procedure call table is invalid" },
  93     { WSAEINVALIDPROVIDER, "Service provider is invalid" },
  94     { WSAEPROVIDERFAILEDINIT, "Service provider failed to initialize" },
  95     { WSASYSCALLFAILURE, "System call failure" },
  96     { WSASERVICE_NOT_FOUND, "Service not found" },
  97     { WSATYPE_NOT_FOUND, "Class type not found" },
  98     { WSA_E_NO_MORE, "No more results" },
  99     { WSA_E_CANCELLED, "Call was cancelled" },
 100     { WSAEREFUSED, "Database query was refused" },
 101     { WSAHOST_NOT_FOUND, "Host not found" },
 102     { WSATRY_AGAIN, "Nonauthoritative host not found (temporary hostname error)" },
 103     { WSANO_RECOVERY, "Non-recoverable hostname error" },
 104     { WSANO_DATA, "Valid name, no data record of requested type" },
 105     { WSA_QOS_RECEIVERS, "QOS receivers" },
 106     { WSA_QOS_SENDERS, "QOS senders" },
 107     { WSA_QOS_NO_SENDERS, "No QOS senders" },
 108     { WSA_QOS_NO_RECEIVERS, "QOS no receivers" },
 109     { WSA_QOS_REQUEST_CONFIRMED, "QOS request confirmed" },
 110     { WSA_QOS_ADMISSION_FAILURE, "QOS admission error" },
 111     { WSA_QOS_POLICY_FAILURE, "QOS policy failure" },
 112     { WSA_QOS_BAD_STYLE, "QOS bad style" },
 113     { WSA_QOS_BAD_OBJECT, "QOS bad object" },
 114     { WSA_QOS_TRAFFIC_CTRL_ERROR, "QOS traffic control error" },
 115     { WSA_QOS_GENERIC_ERROR, "QOS generic error" },
 116     { WSA_QOS_ESERVICETYPE, "QOS service type error" },
 117     { WSA_QOS_EFLOWSPEC, "QOS flowspec error" },
 118     { WSA_QOS_EPROVSPECBUF, "Invalid QOS provider buffer" },
 119     { WSA_QOS_EFILTERSTYLE, "Invalid QOS filter style" },
 120     { WSA_QOS_EFILTERTYPE, "Invalid QOS filter type" },
 121     { WSA_QOS_EFILTERCOUNT, "Incorrect QOS filter count" },
 122     { WSA_QOS_EOBJLENGTH, "Invalid QOS object length" },
 123     { WSA_QOS_EFLOWCOUNT, "Incorrect QOS flow count" },
 124     { WSA_QOS_EUNKNOWNPSOBJ, "Unrecognized QOS object" },
 125     { WSA_QOS_EPOLICYOBJ, "Invalid QOS policy object" },
 126     { WSA_QOS_EFLOWDESC, "Invalid QOS flow descriptor" },
 127     { WSA_QOS_EPSFLOWSPEC, "Invalid QOS provider-specific flowspec" },
 128     { WSA_QOS_EPSFILTERSPEC, "Invalid QOS provider-specific filterspec" },
 129     { WSA_QOS_ESDMODEOBJ, "Invalid QOS shape discard mode object" },
 130     { WSA_QOS_ESHAPERATEOBJ, "Invalid QOS shaping rate object" },
 131     { WSA_QOS_RESERVED_PETYPE, "Reserved policy QOS element type" },
 132     { 0, NULL }
 133     /* Winsock2 error codes are missing, they "never" occur */
 134 };
 135
 136
 137 const char *net_strerror( int value )
 138 {
 139     /* There doesn't seem to be any portable error message generation for
 140      * Winsock errors. Some old versions had s_error, but it appears to be
 141      * gone, and is not documented.
 142      */
 143     for( const wsaerrmsg_t *e = wsaerrmsg; e->msg != NULL; e++ )
 144         if( e->code == value )
 145             return e->msg;
 146
 147     /* Remember to update src/misc/messages.c if you change this one */
 148     return "Unknown network stack error";
 149 }
 150
 151 ssize_t vlc_sendmsg (int s, struct msghdr *hdr, int flags)
 152 {
 153     /* WSASendMsg would be more straightforward, and would support ancilliary
 154      * data, but it's not yet in mingw32. */
 155     if ((hdr->msg_iovlen > 100) || (hdr->msg_controllen > 0))
 156     {
 157         errno = EINVAL;
 158         return -1;
 159     }
 160
 161     WSABUF buf[hdr->msg_iovlen];
 162     for (size_t i = 0; i < sizeof (buf) / sizeof (buf[0]); i++)
 163         buf[i].buf = hdr->msg_iov[i].iov_base,
 164         buf[i].len = hdr->msg_iov[i].iov_len;
 165
 166     DWORD sent;
 167     if (WSASendTo (s, buf, sizeof (buf) / sizeof (buf[0]), &sent, flags,
 168                    hdr->msg_name, hdr->msg_namelen, NULL, NULL) == 0)
 169         return sent;
 170     return -1;
 171 }
 172
 173 ssize_t vlc_recvmsg (int s, struct msghdr *hdr, int flags)
 174 {
 175     /* WSARecvMsg would be more straightforward, and would support ancilliary
 176      * data, but it's not yet in mingw32. */
 177     if (hdr->msg_iovlen > 100)
 178     {
 179         errno = EINVAL;
 180         return -1;
 181     }
 182
 183     WSABUF buf[hdr->msg_iovlen];
 184     for (size_t i = 0; i < sizeof (buf) / sizeof (buf[0]); i++)
 185         buf[i].buf = hdr->msg_iov[i].iov_base,
 186         buf[i].len = hdr->msg_iov[i].iov_len;
 187
 188     DWORD recvd;
 189     hdr->msg_controllen = 0;
 190     hdr->msg_flags = 0;
 191
 192     if (WSARecvFrom (s, buf, sizeof (buf) / sizeof (buf[0]), &recvd, flags,
 193                      hdr->msg_name, hdr->msg_namelen, NULL, NULL) == 0)
 194         return recvd;
 195
 196 #ifdef MSG_TRUNC
 197     if (WSAGetLastError() == WSAEMSGSIZE)
 198     {
 199         hdr->msg_flags |= MSG_TRUNC;
 200         return recvd;
 201     }
 202 #else
 203 # warning Out-of-date Winsock header files!
 204 #endif
 205     return -1;
 206 }