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/* $Id: xioread.c,v 1.24 2005/09/04 09:40:45 gerhard Exp $ */
/* Copyright Gerhard Rieger 2001-2005 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this is the source of the extended read function */
#include "xiosysincludes.h"
#include "xioopen.h"
#include "xio-termios.h"
#include "xio-readline.h"
#include "xio-openssl.h"
/* xioread() performs read() or recvfrom()
If result is < 0, errno is valid */
ssize_t xioread(xiofile_t *file, void *buff, size_t bufsiz) {
ssize_t bytes;
#if WITH_IP6 && 0
int nexthead;
#endif
struct single *pipe;
int _errno;
if (file->tag == XIO_TAG_INVALID) {
Error("xioread(): invalid file descriptor");
errno = EINVAL;
return -1;
}
if (file->tag == XIO_TAG_DUAL) {
pipe = &file->dual.stream[0]->stream;
if (pipe->tag == XIO_TAG_INVALID) {
Error("xioread(): invalid file descriptor");
errno = EINVAL;
return -1;
}
} else {
pipe = &file->stream;
}
if (pipe->readbytes) {
if (pipe->actbytes == 0) {
return 0; /* EOF by count */
}
if (pipe->actbytes < bufsiz) {
bufsiz = pipe->actbytes;
}
}
if (pipe->dtype == DATA_STREAM || pipe->dtype == DATA_PIPE ||
pipe->dtype == DATA_2PIPE) {
do {
bytes = Read(pipe->fd, buff, bufsiz);
} while (bytes < 0 && errno == EINTR);
if (bytes < 0) {
_errno = errno;
switch (_errno) {
#if 1
case EPIPE: case ECONNRESET:
Warn4("read(%d, %p, "F_Zu"): %s",
pipe->fd, buff, bufsiz, strerror(_errno));
break;
#endif
default:
Error4("read(%d, %p, "F_Zu"): %s",
pipe->fd, buff, bufsiz, strerror(_errno));
}
errno = _errno;
return -1;
}
} else if (pipe->dtype == DATA_PTY) {
do {
bytes = Read(pipe->fd, buff, bufsiz);
} while (bytes < 0 && errno == EINTR);
if (bytes < 0) {
_errno = errno;
if (_errno == EIO) {
Notice4("read(%d, %p, "F_Zu"): %s (probably PTY closed)",
pipe->fd, buff, bufsiz, strerror(_errno));
return 0;
} else {
Error4("read(%d, %p, "F_Zu"): %s",
pipe->fd, buff, bufsiz, strerror(_errno));
}
errno = _errno;
return -1;
}
#if WITH_READLINE
} else if (pipe->dtype == DATA_READLINE) {
if ((bytes = xioread_readline(pipe, buff, bufsiz)) < 0) {
return -1;
}
#endif /* WITH_READLINE */
#if WITH_OPENSSL
} else if (pipe->dtype == DATA_OPENSSL) {
/* this function prints its error messages */
if ((bytes = xioread_openssl(pipe, buff, bufsiz)) < 0) {
return -1;
}
#endif /* WITH_OPENSSL */
} else {
#if WITH_RAWIP
union sockaddr_union from;
socklen_t fromlen = sizeof(from);
do {
bytes =
Recvfrom(pipe->fd, buff, bufsiz, 0, &from.soa, &fromlen);
} while (bytes < 0 && errno == EINTR);
if (bytes < 0) {
char infobuff[256];
_errno = errno;
Error6("recvfrom(%d, %p, "F_Zu", 0, %s, "F_socklen"): %s",
pipe->fd, buff, bufsiz,
sockaddr_info(&from.soa, infobuff, sizeof(infobuff)),
&fromlen, strerror(errno));
errno = _errno;
return -1;
}
switch(from.soa.sa_family) {
int headlen;
#if WITH_IP4
case AF_INET:
headlen = 4*((struct ip *)buff)->ip_hl;
if (headlen > bytes) {
Warn1("xioread(%d, ...)/IP4: short packet", pipe->fd);
bytes = 0;
} else {
memmove(buff, ((char *)buff)+headlen, bytes-headlen);
bytes -= headlen;
}
break;
#endif
#if WITH_IP6
case AF_INET6: /* does not seem to include header... */
break;
#endif
default:
/* do nothing, for now */
break;
}
#if 0
if (fromlen != pipe->fd[0].salen) {
Debug("recvfrom(): wrong peer address length, ignoring packet");
continue;
}
if (memcmp(&from, &pipe->fd[0].peersa.sa, fromlen)) {
Debug("recvfrom(): other peer address, ignoring packet");
Debug16("peer: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
pipe->fd[0].peersa.space[0],
pipe->fd[0].peersa.space[1],
pipe->fd[0].peersa.space[2],
pipe->fd[0].peersa.space[3],
pipe->fd[0].peersa.space[4],
pipe->fd[0].peersa.space[5],
pipe->fd[0].peersa.space[6],
pipe->fd[0].peersa.space[7],
pipe->fd[0].peersa.space[8],
pipe->fd[0].peersa.space[9],
pipe->fd[0].peersa.space[10],
pipe->fd[0].peersa.space[11],
pipe->fd[0].peersa.space[12],
pipe->fd[0].peersa.space[13],
pipe->fd[0].peersa.space[14],
pipe->fd[0].peersa.space[15]);
Debug16("from: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
from.space[0], from.space[1],
from.space[2], from.space[3],
from.space[4], from.space[5],
from.space[6], from.space[7],
from.space[8], from.space[9],
from.space[10], from.space[11],
from.space[12], from.space[13],
from.space[14], from.space[15]);
continue;
}
#endif
#else /* !WITH_RAWIP */
Fatal("address requires raw sockets, but they are not compiled in");
return -1;
#endif /* !WITH_RAWIP */
}
pipe->actbytes -= bytes;
return bytes;
}
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