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/* UNIX RFCNB (RFC1001/RFC1002) NEtBIOS implementation
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* RFCNB IO Routines ...
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* Copyright (C) Richard Sharpe 1996
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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/* #include <features.h> */
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#include "std-includes.h"
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#include "rfcnb-priv.h"
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#include "rfcnb-util.h"
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#include <sys/signal.h>
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void rfcnb_alarm(int sig);
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int RFCNB_Set_Timeout(int seconds);
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int RFCNB_Discard_Rest(struct RFCNB_Con *con, int len);
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int RFCNB_Timeout = 0; /**< Timeout in seconds ... */
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fprintf(stderr, "IO Timed out ...\n");
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/** Set timeout value and setup signal handling */
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RFCNB_Set_Timeout(int seconds)
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/* If we are on a Bezerkeley system, use sigvec, else sigaction */
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struct sigaction inact, outact;
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struct sigvec invec, outvec;
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RFCNB_Timeout = seconds;
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if (RFCNB_Timeout > 0) { /* Set up handler to ignore but not restart */
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inact.sa_handler = (void (*)()) rfcnb_alarm;
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sigemptyset(&inact.sa_mask);
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inact.sa_flags = 0; /* Don't restart */
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if (sigaction(SIGALRM, &inact, &outact) < 0)
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invec.sv_handler = (void (*)()) rfcnb_alarm;
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invec.sv_flags = SV_INTERRUPT;
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if (sigvec(SIGALRM, &invec, &outvec) < 0)
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/** Discard the rest of an incoming packet as we do not have space for it
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* in the buffer we allocated or were passed ...
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RFCNB_Discard_Rest(struct RFCNB_Con *con, int len)
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char temp[100]; /* Read into here */
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int rest, this_read, bytes_read;
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/* len is the amount we should read */
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fprintf(stderr, "Discard_Rest called to discard: %i\n", len);
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this_read = (rest > sizeof(temp) ? sizeof(temp) : rest);
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bytes_read = read(con->fd, temp, this_read);
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if (bytes_read <= 0) { /* Error so return */
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RFCNB_errno = RFCNBE_BadRead;
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RFCNB_errno = RFCNBE_ConGone;
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RFCNB_saved_errno = errno;
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rest = rest - bytes_read;
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/** Send an RFCNB packet to the connection.
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* We just send each of the blocks linked together ...
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* If we can, try to send it as one iovec ...
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RFCNB_Put_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len)
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int len_sent, tot_sent, this_len;
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struct RFCNB_Pkt *pkt_ptr;
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struct iovec io_list[10]; /* We should never have more */
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/* If we do, this will blow up ... */
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/* Try to send the data ... We only send as many bytes as len claims */
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/* We should try to stuff it into an IOVEC and send as one write */
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len_sent = tot_sent = 0; /* Nothing sent so far */
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while ((pkt_ptr != NULL) & (i < 10)) { /* Watch that magic number! */
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this_len = pkt_ptr->len;
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this_data = pkt_ptr->data;
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if ((tot_sent + this_len) > len)
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this_len = len - tot_sent; /* Adjust so we don't send too much */
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/* Now plug into the iovec ... */
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io_list[i].iov_len = this_len;
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io_list[i].iov_base = this_data;
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tot_sent += this_len;
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break; /* Let's not send too much */
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pkt_ptr = pkt_ptr->next;
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fprintf(stderr, "Frags = %i, tot_sent = %i\n", i, tot_sent);
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/* Set up an alarm if timeouts are set ... */
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if (RFCNB_Timeout > 0)
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alarm(RFCNB_Timeout);
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if ((len_sent = writev(con->fd, io_list, i)) < 0) { /* An error */
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con->rfc_errno = errno;
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if (errno == EINTR) /* We were interrupted ... */
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RFCNB_errno = RFCNBE_Timeout;
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RFCNB_errno = RFCNBE_BadWrite;
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RFCNB_saved_errno = errno;
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if (len_sent < tot_sent) { /* Less than we wanted */
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if (errno == EINTR) /* We were interrupted */
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RFCNB_errno = RFCNBE_Timeout;
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RFCNB_errno = RFCNBE_BadWrite;
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RFCNB_saved_errno = errno;
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if (RFCNB_Timeout > 0)
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alarm(0); /* Reset that sucker */
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fprintf(stderr, "Len sent = %i ...\n", len_sent);
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RFCNB_Print_Pkt(stderr, "sent", pkt, len_sent); /* Print what send ... */
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/** Read an RFCNB packet off the connection.
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* We read the first 4 bytes, that tells us the length, then read the
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* rest. We should implement a timeout, but we don't just yet
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RFCNB_Get_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len)
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int read_len, pkt_len;
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char hdr[RFCNB_Pkt_Hdr_Len]; /* Local space for the header */
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struct RFCNB_Pkt *pkt_frag;
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int more, this_time, offset, frag_len, this_len;
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BOOL seen_keep_alive = TRUE;
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/* Read that header straight into the buffer */
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if (len < RFCNB_Pkt_Hdr_Len) { /* What a bozo */
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fprintf(stderr, "Trying to read less than a packet:");
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RFCNB_errno = RFCNBE_BadParam;
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/* We discard keep alives here ... */
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if (RFCNB_Timeout > 0)
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alarm(RFCNB_Timeout);
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while (seen_keep_alive) {
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if ((read_len = read(con->fd, hdr, sizeof(hdr))) < 0) { /* Problems */
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fprintf(stderr, "Reading the packet, we got:");
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RFCNB_errno = RFCNBE_Timeout;
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RFCNB_errno = RFCNBE_BadRead;
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RFCNB_saved_errno = errno;
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/* Now we check out what we got */
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if (read_len == 0) { /* Connection closed, send back eof? */
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fprintf(stderr, "Connection closed reading\n");
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RFCNB_errno = RFCNBE_Timeout;
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RFCNB_errno = RFCNBE_ConGone;
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RFCNB_saved_errno = errno;
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if (RFCNB_Pkt_Type(hdr) == RFCNB_SESSION_KEEP_ALIVE) {
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fprintf(stderr, "RFCNB KEEP ALIVE received\n");
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seen_keep_alive = FALSE;
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/* What if we got less than or equal to a hdr size in bytes? */
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if (read_len < sizeof(hdr)) { /* We got a small packet */
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/* Now we need to copy the hdr portion we got into the supplied packet */
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memcpy(pkt->data, hdr, read_len); /*Copy data */
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RFCNB_Print_Pkt(stderr, "rcvd", pkt, read_len);
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/* Now, if we got at least a hdr size, alloc space for rest, if we need it */
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pkt_len = RFCNB_Pkt_Len(hdr);
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fprintf(stderr, "Reading Pkt: Length = %i\n", pkt_len);
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/* Now copy in the hdr */
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memcpy(pkt->data, hdr, sizeof(hdr));
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/* Get the rest of the packet ... first figure out how big our buf is? */
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/* And make sure that we handle the fragments properly ... Sure should */
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/* use an iovec ... */
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if (len < pkt_len) /* Only get as much as we have space for */
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more = len - RFCNB_Pkt_Hdr_Len;
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/* We read for each fragment ... */
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if (pkt->len == read_len) { /* If this frag was exact size */
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pkt_frag = pkt->next; /* Stick next lot in next frag */
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offset = 0; /* then we start at 0 in next */
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pkt_frag = pkt; /* Otherwise use rest of this frag */
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offset = RFCNB_Pkt_Hdr_Len; /* Otherwise skip the header */
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frag_len = pkt_frag->len;
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if (more <= frag_len) /* If len left to get less than frag space */
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this_len = more; /* Get the rest ... */
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this_len = frag_len - offset;
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if ((this_time = read(con->fd, (pkt_frag->data) + offset, this_len)) <= 0) { /* Problems */
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if (errno == EINTR) {
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RFCNB_errno = RFCNB_Timeout;
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RFCNB_errno = RFCNBE_BadRead;
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RFCNB_errno = RFCNBE_ConGone;
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RFCNB_saved_errno = errno;
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fprintf(stderr, "Frag_Len = %i, this_time = %i, this_len = %i, more = %i\n", frag_len,
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this_time, this_len, more);
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read_len = read_len + this_time; /* How much have we read ... */
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/* Now set up the next part */
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if (pkt_frag->next == NULL)
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break; /* That's it here */
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pkt_frag = pkt_frag->next;
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this_len = pkt_frag->len;
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more = more - this_time;
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fprintf(stderr, "Pkt Len = %i, read_len = %i\n", pkt_len, read_len);
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RFCNB_Print_Pkt(stderr, "rcvd", pkt, read_len + sizeof(hdr));
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if (read_len < (pkt_len + sizeof(hdr))) { /* Discard the rest */
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return (RFCNB_Discard_Rest(con, (pkt_len + sizeof(hdr)) - read_len));
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if (RFCNB_Timeout > 0)
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alarm(0); /* Reset that sucker */
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return (read_len + sizeof(RFCNB_Hdr));
added
removed
helpers/ntlm_auth/smb_lm/smbval/rfcnb-io.c
