ext/Socket/Socket.xs

   1 #define PERL_NO_GET_CONTEXT
   2 #include "EXTERN.h"
   3 #include "perl.h"
   4 #include "XSUB.h"
   5
   6 #ifndef VMS
   7 # ifdef I_SYS_TYPES
   8 #  include <sys/types.h>
   9 # endif
  10 # include <sys/socket.h>
  11 # if defined(USE_SOCKS) && defined(I_SOCKS)
  12 #   include <socks.h>
  13 # endif
  14 # ifdef MPE
  15 #  define PF_INET AF_INET
  16 #  define PF_UNIX AF_UNIX
  17 #  define SOCK_RAW 3
  18 # endif
  19 # ifdef I_SYS_UN
  20 #  include <sys/un.h>
  21 # endif
  22 /* XXX Configure test for <netinet/in_systm.h needed XXX */
  23 # if defined(NeXT) || defined(__NeXT__)
  24 #  include <netinet/in_systm.h>
  25 # endif
  26 # ifdef I_NETINET_IN
  27 #  include <netinet/in.h>
  28 # endif
  29 # ifdef I_NETDB
  30 #  include <netdb.h>
  31 # endif
  32 # ifdef I_ARPA_INET
  33 #  include <arpa/inet.h>
  34 # endif
  35 # ifdef I_NETINET_TCP
  36 #  include <netinet/tcp.h>
  37 # endif
  38 #else
  39 # include "sockadapt.h"
  40 #endif
  41
  42 #ifdef NETWARE
  43 NETDB_DEFINE_CONTEXT
  44 NETINET_DEFINE_CONTEXT
  45 #endif
  46
  47 #ifdef I_SYSUIO
  48 # include <sys/uio.h>
  49 #endif
  50
  51 #ifndef AF_NBS
  52 # undef PF_NBS
  53 #endif
  54
  55 #ifndef AF_X25
  56 # undef PF_X25
  57 #endif
  58
  59 #ifndef INADDR_NONE
  60 # define INADDR_NONE    0xffffffff
  61 #endif /* INADDR_NONE */
  62 #ifndef INADDR_BROADCAST
  63 # define INADDR_BROADCAST       0xffffffff
  64 #endif /* INADDR_BROADCAST */
  65 #ifndef INADDR_LOOPBACK
  66 # define INADDR_LOOPBACK         0x7F000001
  67 #endif /* INADDR_LOOPBACK */
  68
  69 #ifndef HAS_INET_ATON
  70
  71 /*
  72  * Check whether "cp" is a valid ascii representation
  73  * of an Internet address and convert to a binary address.
  74  * Returns 1 if the address is valid, 0 if not.
  75  * This replaces inet_addr, the return value from which
  76  * cannot distinguish between failure and a local broadcast address.
  77  */
  78 static int
  79 my_inet_aton(register const char *cp, struct in_addr *addr)
  80 {
  81         dTHX;
  82         register U32 val;
  83         register int base;
  84         register char c;
  85         int nparts;
  86         const char *s;
  87         unsigned int parts[4];
  88         register unsigned int *pp = parts;
  89
  90         if (!cp)
  91                 return 0;
  92         for (;;) {
  93                 /*
  94                  * Collect number up to ``.''.
  95                  * Values are specified as for C:
  96                  * 0x=hex, 0=octal, other=decimal.
  97                  */
  98                 val = 0; base = 10;
  99                 if (*cp == '0') {
 100                         if (*++cp == 'x' || *cp == 'X')
 101                                 base = 16, cp++;
 102                         else
 103                                 base = 8;
 104                 }
 105                 while ((c = *cp) != '\0') {
 106                         if (isDIGIT(c)) {
 107                                 val = (val * base) + (c - '0');
 108                                 cp++;
 109                                 continue;
 110                         }
 111                         if (base == 16 && (s=strchr(PL_hexdigit,c))) {
 112                                 val = (val << 4) +
 113                                         ((s - PL_hexdigit) & 15);
 114                                 cp++;
 115                                 continue;
 116                         }
 117                         break;
 118                 }
 119                 if (*cp == '.') {
 120                         /*
 121                          * Internet format:
 122                          *      a.b.c.d
 123                          *      a.b.c   (with c treated as 16-bits)
 124                          *      a.b     (with b treated as 24 bits)
 125                          */
 126                         if (pp >= parts + 3 || val > 0xff)
 127                                 return 0;
 128                         *pp++ = val, cp++;
 129                 } else
 130                         break;
 131         }
 132         /*
 133          * Check for trailing characters.
 134          */
 135         if (*cp && !isSPACE(*cp))
 136                 return 0;
 137         /*
 138          * Concoct the address according to
 139          * the number of parts specified.
 140          */
 141         nparts = pp - parts + 1;        /* force to an int for switch() */
 142         switch (nparts) {
 143
 144         case 1:                         /* a -- 32 bits */
 145                 break;
 146
 147         case 2:                         /* a.b -- 8.24 bits */
 148                 if (val > 0xffffff)
 149                         return 0;
 150                 val |= parts[0] << 24;
 151                 break;
 152
 153         case 3:                         /* a.b.c -- 8.8.16 bits */
 154                 if (val > 0xffff)
 155                         return 0;
 156                 val |= (parts[0] << 24) | (parts[1] << 16);
 157                 break;
 158
 159         case 4:                         /* a.b.c.d -- 8.8.8.8 bits */
 160                 if (val > 0xff)
 161                         return 0;
 162                 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
 163                 break;
 164         }
 165         addr->s_addr = htonl(val);
 166         return 1;
 167 }
 168
 169 #undef inet_aton
 170 #define inet_aton my_inet_aton
 171
 172 #endif /* ! HAS_INET_ATON */
 173
 174
 175 static int
 176 not_here(char *s)
 177 {
 178     croak("Socket::%s not implemented on this architecture", s);
 179     return -1;
 180 }
 181
 182 #include "constants.c"
 183
 184 MODULE = Socket         PACKAGE = Socket
 185
 186 INCLUDE: constants.xs
 187
 188 void
 189 inet_aton(host)
 190         char *  host
 191         CODE:
 192         {
 193         struct in_addr ip_address;
 194         struct hostent * phe;
 195         int ok = inet_aton(host, &ip_address);
 196
 197         if (!ok && (phe = gethostbyname(host))) {
 198                 Copy( phe->h_addr, &ip_address, phe->h_length, char );
 199                 ok = 1;
 200         }
 201
 202         ST(0) = sv_newmortal();
 203         if (ok) {
 204                 sv_setpvn( ST(0), (char *)&ip_address, sizeof ip_address );
 205         }
 206         }
 207
 208 void
 209 inet_ntoa(ip_address_sv)
 210         SV *    ip_address_sv
 211         CODE:
 212         {
 213         STRLEN addrlen;
 214         struct in_addr addr;
 215         char * addr_str;
 216         char * ip_address;
 217         if (DO_UTF8(ip_address_sv) && !sv_utf8_downgrade(ip_address_sv, 1))
 218              croak("Wide character in Socket::inet_ntoa");
 219         ip_address = SvPV(ip_address_sv,addrlen);
 220         if (addrlen != sizeof(addr)) {
 221             croak("Bad arg length for %s, length is %d, should be %d",
 222                         "Socket::inet_ntoa",
 223                         addrlen, sizeof(addr));
 224         }
 225         Copy( ip_address, &addr, sizeof addr, char );
 226 #if defined(__hpux) && defined(__GNUC__) && defined(USE_64_BIT_INT)
 227         /* GCC on HP_UX breaks the call to inet_ntoa --sky */
 228         New(1138, addr_str, 4 * 3 + 3 + 1, char);
 229         sprintf(addr_str, "%d.%d.%d.%d",
 230                 ((addr.s_addr >> 24) & 0xFF),
 231                 ((addr.s_addr >> 16) & 0xFF),
 232                 ((addr.s_addr >>  8) & 0xFF),
 233                 ( addr.s_addr        & 0xFF));
 234         ST(0) = sv_2mortal(newSVpvn(addr_str, strlen(addr_str)));
 235         Safefree(addr_str);
 236 #else
 237         addr_str = inet_ntoa(addr);
 238         ST(0) = sv_2mortal(newSVpvn(addr_str, strlen(addr_str)));
 239 #endif
 240         }
 241
 242 void
 243 pack_sockaddr_un(pathname)
 244         char *  pathname
 245         CODE:
 246         {
 247 #ifdef I_SYS_UN
 248         struct sockaddr_un sun_ad; /* fear using sun */
 249         STRLEN len;
 250
 251         Zero( &sun_ad, sizeof sun_ad, char );
 252         sun_ad.sun_family = AF_UNIX;
 253         len = strlen(pathname);
 254         if (len > sizeof(sun_ad.sun_path))
 255             len = sizeof(sun_ad.sun_path);
 256 #  ifdef OS2    /* Name should start with \socket\ and contain backslashes! */
 257         {
 258             int off;
 259             char *s, *e;
 260
 261             if (pathname[0] != '/' && pathname[0] != '\\')
 262                 croak("Relative UNIX domain socket name '%s' unsupported", pathname);
 263             else if (len < 8
 264                      || pathname[7] != '/' && pathname[7] != '\\'
 265                      || !strnicmp(pathname + 1, "socket", 6))
 266                 off = 7;
 267             else
 268                 off = 0;                /* Preserve names starting with \socket\ */
 269             Copy( "\\socket", sun_ad.sun_path, off, char);
 270             Copy( pathname, sun_ad.sun_path + off, len, char );
 271
 272             s = sun_ad.sun_path + off - 1;
 273             e = s + len + 1;
 274             while (++s < e)
 275                 if (*s = '/')
 276                     *s = '\\';
 277         }
 278 #  else /* !( defined OS2 ) */
 279         Copy( pathname, sun_ad.sun_path, len, char );
 280 #  endif
 281         if (0) not_here("dummy");
 282         ST(0) = sv_2mortal(newSVpvn((char *)&sun_ad, sizeof sun_ad));
 283 #else
 284         ST(0) = (SV *) not_here("pack_sockaddr_un");
 285 #endif
 286
 287         }
 288
 289 void
 290 unpack_sockaddr_un(sun_sv)
 291         SV *    sun_sv
 292         CODE:
 293         {
 294 #ifdef I_SYS_UN
 295         struct sockaddr_un addr;
 296         STRLEN sockaddrlen;
 297         char * sun_ad = SvPV(sun_sv,sockaddrlen);
 298         char * e;
 299 #   ifndef __linux__
 300         /* On Linux sockaddrlen on sockets returned by accept, recvfrom,
 301            getpeername and getsockname is not equal to sizeof(addr). */
 302         if (sockaddrlen != sizeof(addr)) {
 303             croak("Bad arg length for %s, length is %d, should be %d",
 304                         "Socket::unpack_sockaddr_un",
 305                         sockaddrlen, sizeof(addr));
 306         }
 307 #   endif
 308
 309         Copy( sun_ad, &addr, sizeof addr, char );
 310
 311         if ( addr.sun_family != AF_UNIX ) {
 312             croak("Bad address family for %s, got %d, should be %d",
 313                         "Socket::unpack_sockaddr_un",
 314                         addr.sun_family,
 315                         AF_UNIX);
 316         }
 317         e = addr.sun_path;
 318         while (*e && e < addr.sun_path + sizeof addr.sun_path)
 319             ++e;
 320         ST(0) = sv_2mortal(newSVpvn(addr.sun_path, e - addr.sun_path));
 321 #else
 322         ST(0) = (SV *) not_here("unpack_sockaddr_un");
 323 #endif
 324         }
 325
 326 void
 327 pack_sockaddr_in(port,ip_address)
 328         unsigned short  port
 329         char *  ip_address
 330         CODE:
 331         {
 332         struct sockaddr_in sin;
 333
 334         Zero( &sin, sizeof sin, char );
 335         sin.sin_family = AF_INET;
 336         sin.sin_port = htons(port);
 337         Copy( ip_address, &sin.sin_addr, sizeof sin.sin_addr, char );
 338
 339         ST(0) = sv_2mortal(newSVpvn((char *)&sin, sizeof sin));
 340         }
 341
 342 void
 343 unpack_sockaddr_in(sin_sv)
 344         SV *    sin_sv
 345         PPCODE:
 346         {
 347         STRLEN sockaddrlen;
 348         struct sockaddr_in addr;
 349         unsigned short  port;
 350         struct in_addr  ip_address;
 351         char *  sin = SvPV(sin_sv,sockaddrlen);
 352         if (sockaddrlen != sizeof(addr)) {
 353             croak("Bad arg length for %s, length is %d, should be %d",
 354                         "Socket::unpack_sockaddr_in",
 355                         sockaddrlen, sizeof(addr));
 356         }
 357         Copy( sin, &addr,sizeof addr, char );
 358         if ( addr.sin_family != AF_INET ) {
 359             croak("Bad address family for %s, got %d, should be %d",
 360                         "Socket::unpack_sockaddr_in",
 361                         addr.sin_family,
 362                         AF_INET);
 363         }
 364         port = ntohs(addr.sin_port);
 365         ip_address = addr.sin_addr;
 366
 367         EXTEND(SP, 2);
 368         PUSHs(sv_2mortal(newSViv((IV) port)));
 369         PUSHs(sv_2mortal(newSVpvn((char *)&ip_address,sizeof ip_address)));
 370         }