diff options
Diffstat (limited to 'daemon/rfcnb')
| -rw-r--r-- | daemon/rfcnb/byteorder.h | 80 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-common.h | 36 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-error.h | 75 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-io.c | 407 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-io.h | 28 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-priv.h | 151 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-util.c | 532 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb-util.h | 50 | ||||
| -rw-r--r-- | daemon/rfcnb/rfcnb.h | 48 | ||||
| -rw-r--r-- | daemon/rfcnb/session.c | 364 | ||||
| -rw-r--r-- | daemon/rfcnb/std-includes.h | 45 | ||||
| -rw-r--r-- | daemon/rfcnb/x_Makefile | 38 |
12 files changed, 1854 insertions, 0 deletions
diff --git a/daemon/rfcnb/byteorder.h b/daemon/rfcnb/byteorder.h new file mode 100644 index 0000000..2dae575 --- /dev/null +++ b/daemon/rfcnb/byteorder.h @@ -0,0 +1,80 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + SMB Byte handling + Copyright (C) Andrew Tridgell 1992-1995 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* + This file implements macros for machine independent short and + int manipulation +*/ + +#undef CAREFUL_ALIGNMENT + +/* we know that the 386 can handle misalignment and has the "right" + byteorder */ +#ifdef __i386__ +#define CAREFUL_ALIGNMENT 0 +#endif + +#ifndef CAREFUL_ALIGNMENT +#define CAREFUL_ALIGNMENT 1 +#endif + +#define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) +#define PVAL(buf,pos) ((unsigned)CVAL(buf,pos)) +#define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val)) + + +#if CAREFUL_ALIGNMENT +#define SVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+1)<<8) +#define IVAL(buf,pos) (SVAL(buf,pos)|SVAL(buf,(pos)+2)<<16) +#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) +#define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16)) +#define SVALS(buf,pos) ((int16)SVAL(buf,pos)) +#define IVALS(buf,pos) ((int32)IVAL(buf,pos)) +#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((uint16)(val))) +#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val))) +#define SSVALS(buf,pos,val) SSVALX((buf),(pos),((int16)(val))) +#define SIVALS(buf,pos,val) SIVALX((buf),(pos),((int32)(val))) +#else +/* this handles things for architectures like the 386 that can handle + alignment errors */ +/* + WARNING: This section is dependent on the length of int16 and int32 + being correct +*/ +#define SVAL(buf,pos) (*(uint16 *)((char *)(buf) + (pos))) +#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos))) +#define SVALS(buf,pos) (*(int16 *)((char *)(buf) + (pos))) +#define IVALS(buf,pos) (*(int32 *)((char *)(buf) + (pos))) +#define SSVAL(buf,pos,val) SVAL(buf,pos)=((uint16)(val)) +#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val)) +#define SSVALS(buf,pos,val) SVALS(buf,pos)=((int16)(val)) +#define SIVALS(buf,pos,val) IVALS(buf,pos)=((int32)(val)) +#endif + + +/* now the reverse routines - these are used in nmb packets (mostly) */ +#define SREV(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF)) +#define IREV(x) ((SREV(x)<<16) | (SREV((x)>>16))) + +#define RSVAL(buf,pos) SREV(SVAL(buf,pos)) +#define RIVAL(buf,pos) IREV(IVAL(buf,pos)) +#define RSSVAL(buf,pos,val) SSVAL(buf,pos,SREV(val)) +#define RSIVAL(buf,pos,val) SIVAL(buf,pos,IREV(val)) diff --git a/daemon/rfcnb/rfcnb-common.h b/daemon/rfcnb/rfcnb-common.h new file mode 100644 index 0000000..0d7d5dd --- /dev/null +++ b/daemon/rfcnb/rfcnb-common.h @@ -0,0 +1,36 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB Common Structures etc Defines + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* A data structure we need */ + +typedef struct RFCNB_Pkt { + + char * data; /* The data in this portion */ + int len; + struct RFCNB_Pkt *next; + +} RFCNB_Pkt; + + diff --git a/daemon/rfcnb/rfcnb-error.h b/daemon/rfcnb/rfcnb-error.h new file mode 100644 index 0000000..bb49d68 --- /dev/null +++ b/daemon/rfcnb/rfcnb-error.h @@ -0,0 +1,75 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB Error Response Defines + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* Error responses */ + +#define RFCNBE_Bad -1 /* Bad response */ +#define RFCNBE_OK 0 + +/* these should follow the spec ... is there one ?*/ + +#define RFCNBE_NoSpace 1 /* Could not allocate space for a struct */ +#define RFCNBE_BadName 2 /* Could not translate a name */ +#define RFCNBE_BadRead 3 /* Read sys call failed */ +#define RFCNBE_BadWrite 4 /* Write Sys call failed */ +#define RFCNBE_ProtErr 5 /* Protocol Error */ +#define RFCNBE_ConGone 6 /* Connection dropped */ +#define RFCNBE_BadHandle 7 /* Handle passed was bad */ +#define RFCNBE_BadSocket 8 /* Problems creating socket */ +#define RFCNBE_ConnectFailed 9 /* Connect failed */ +#define RFCNBE_CallRejNLOCN 10 /* Call rejected, not listening on CN */ +#define RFCNBE_CallRejNLFCN 11 /* Call rejected, not listening for CN */ +#define RFCNBE_CallRejCNNP 12 /* Call rejected, called name not present */ +#define RFCNBE_CallRejInfRes 13/* Call rejetced, name ok, no resources */ +#define RFCNBE_CallRejUnSpec 14/* Call rejected, unspecified error */ +#define RFCNBE_BadParam 15/* Bad parameters passed ... */ +#define RFCNBE_Timeout 16/* IO Timed out */ + +/* Text strings for the error responses */ + +static char *RFCNB_Error_Strings[] = { + + "RFCNBE_OK: Routine completed successfully.", + "RFCNBE_NoSpace: No space available for a malloc call.", + "RFCNBE_BadName: NetBIOS name could not be translated to IP address.", + "RFCNBE_BadRead: Read system call returned an error. Check errno.", + "RFCNBE_BadWrite: Write system call returned an error. Check errno.", + "RFCNBE_ProtErr: A protocol error has occurred.", + "RFCNBE_ConGone: Connection dropped during a read or write system call.", + "RFCNBE_BadHandle: Bad connection handle passed.", + "RFCNBE_BadSocket: Problems creating socket.", + "RFCNBE_ConnectFailed: Connection failed. See errno.", + "RFCNBE_CallRejNLOCN: Call rejected. Not listening on called name.", + "RFCNBE_CallRejNLFCN: Call rejected. Not listening for called name.", + "RFCNBE_CallRejCNNP: Call rejected. Called name not present.", + "RFCNBE_CallRejInfRes: Call rejected. Name present, but insufficient resources.", + "RFCNBE_CallRejUnSpec: Call rejected. Unspecified error.", + "RFCNBE_BadParam: Bad parameters passed to a routine.", + "RFCNBE_Timeout: IO Operation timed out ..." + +}; + + + diff --git a/daemon/rfcnb/rfcnb-io.c b/daemon/rfcnb/rfcnb-io.c new file mode 100644 index 0000000..db2437f --- /dev/null +++ b/daemon/rfcnb/rfcnb-io.c @@ -0,0 +1,407 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NEtBIOS implementation + + Version 1.0 + RFCNB IO Routines ... + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "std-includes.h" +#include "rfcnb-priv.h" +#include "rfcnb-util.h" +#include "rfcnb-io.h" +#include <sys/uio.h> +#include <sys/signal.h> + +int RFCNB_Timeout = 0; /* Timeout in seconds ... */ + +void rfcnb_alarm(int sig) + +{ + + fprintf(stderr, "IO Timed out ...\n"); + +} + +/* Set timeout value and setup signal handling */ + +int RFCNB_Set_Timeout(int seconds) + +{ + /* If we are on a Bezerkeley system, use sigvec, else sigaction */ +#ifndef SA_RESTART + struct sigvec invec, outvec; +#else + struct sigaction inact, outact; +#endif + + RFCNB_Timeout = seconds; + + if (RFCNB_Timeout > 0) { /* Set up handler to ignore but not restart */ + +#ifndef SA_RESTART + invec.sv_handler = (void (*)())rfcnb_alarm; + invec.sv_mask = 0; + invec.sv_flags = SV_INTERRUPT; + + if (sigvec(SIGALRM, &invec, &outvec) < 0) + return(-1); +#else + inact.sa_handler = (void (*)())rfcnb_alarm; + memset(&(inact.sa_mask), 0, sizeof(inact.sa_mask)); + inact.sa_flags = 0; /* Don't restart */ + + if (sigaction(SIGALRM, &inact, &outact) < 0) + return(-1); + +#endif + + } + + return(0); + +} + +/* Discard the rest of an incoming packet as we do not have space for it + in the buffer we allocated or were passed ... */ + +int RFCNB_Discard_Rest(struct RFCNB_Con *con, int len) + +{ char temp[100]; /* Read into here */ + int rest, this_read, bytes_read; + + /* len is the amount we should read */ + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Discard_Rest called to discard: %i\n", len); +#endif + + rest = len; + + while (rest > 0) { + + this_read = (rest > sizeof(temp)?sizeof(temp):rest); + + bytes_read = read(con -> fd, temp, this_read); + + if (bytes_read <= 0) { /* Error so return */ + + if (bytes_read < 0) + RFCNB_errno = RFCNBE_BadRead; + else + RFCNB_errno = RFCNBE_ConGone; + + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + rest = rest - bytes_read; + + } + + return(0); + +} + + +/* Send an RFCNB packet to the connection. + + We just send each of the blocks linked together ... + + If we can, try to send it as one iovec ... + +*/ + +int RFCNB_Put_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len) + +{ int len_sent, tot_sent, this_len; + struct RFCNB_Pkt *pkt_ptr; + char *this_data; + int i; + struct iovec io_list[10]; /* We should never have more */ + /* If we do, this will blow up ...*/ + + /* Try to send the data ... We only send as many bytes as len claims */ + /* We should try to stuff it into an IOVEC and send as one write */ + + + pkt_ptr = pkt; + len_sent = tot_sent = 0; /* Nothing sent so far */ + i = 0; + + while ((pkt_ptr != NULL) & (i < 10)) { /* Watch that magic number! */ + + this_len = pkt_ptr -> len; + this_data = pkt_ptr -> data; + if ((tot_sent + this_len) > len) + this_len = len - tot_sent; /* Adjust so we don't send too much */ + + /* Now plug into the iovec ... */ + + io_list[i].iov_len = this_len; + io_list[i].iov_base = this_data; + i++; + + tot_sent += this_len; + + if (tot_sent == len) break; /* Let's not send too much */ + + pkt_ptr = pkt_ptr -> next; + + } + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Frags = %i, tot_sent = %i\n", i, tot_sent); +#endif + + /* Set up an alarm if timeouts are set ... */ + + if (RFCNB_Timeout > 0) + alarm(RFCNB_Timeout); + + if ((len_sent = writev(con -> fd, io_list, i)) < 0) { /* An error */ + + con -> err = errno; + if (errno == EINTR) /* We were interrupted ... */ + RFCNB_errno = RFCNBE_Timeout; + else + RFCNB_errno = RFCNBE_BadWrite; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + if (len_sent < tot_sent) { /* Less than we wanted */ + if (errno == EINTR) /* We were interrupted */ + RFCNB_errno = RFCNBE_Timeout; + else + RFCNB_errno = RFCNBE_BadWrite; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + } + + if (RFCNB_Timeout > 0) + alarm(0); /* Reset that sucker */ + +#ifdef RFCNB_DEBUG + + fprintf(stderr, "Len sent = %i ...\n", len_sent); + RFCNB_Print_Pkt(stderr, "sent", pkt, len_sent); /* Print what send ... */ + +#endif + + return(len_sent); + +} + +/* Read an RFCNB packet off the connection. + + We read the first 4 bytes, that tells us the length, then read the + rest. We should implement a timeout, but we don't just yet + +*/ + + +int RFCNB_Get_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len) + +{ int read_len, pkt_len; + char hdr[RFCNB_Pkt_Hdr_Len]; /* Local space for the header */ + struct RFCNB_Pkt *pkt_frag; + int more, this_time, offset, frag_len, this_len; + BOOL seen_keep_alive = TRUE; + + /* Read that header straight into the buffer */ + + if (len < RFCNB_Pkt_Hdr_Len) { /* What a bozo */ + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Trying to read less than a packet:"); + perror(""); +#endif + RFCNB_errno = RFCNBE_BadParam; + return(RFCNBE_Bad); + + } + + /* We discard keep alives here ... */ + + if (RFCNB_Timeout > 0) + alarm(RFCNB_Timeout); + + while (seen_keep_alive) { + + if ((read_len = read(con -> fd, hdr, sizeof(hdr))) < 0) { /* Problems */ +#ifdef RFCNB_DEBUG + fprintf(stderr, "Reading the packet, we got:"); + perror(""); +#endif + if (errno == EINTR) + RFCNB_errno = RFCNBE_Timeout; + else + RFCNB_errno = RFCNBE_BadRead; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + /* Now we check out what we got */ + + if (read_len == 0) { /* Connection closed, send back eof? */ + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Connection closed reading\n"); +#endif + + if (errno == EINTR) + RFCNB_errno = RFCNBE_Timeout; + else + RFCNB_errno = RFCNBE_ConGone; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + if (RFCNB_Pkt_Type(hdr) == RFCNB_SESSION_KEEP_ALIVE) { + +#ifdef RFCNB_DEBUG + fprintf(stderr, "RFCNB KEEP ALIVE received\n"); +#endif + + } + else { + seen_keep_alive = FALSE; + } + + } + + /* What if we got less than or equal to a hdr size in bytes? */ + + if (read_len < sizeof(hdr)) { /* We got a small packet */ + + /* Now we need to copy the hdr portion we got into the supplied packet */ + + memcpy(pkt -> data, hdr, read_len); /*Copy data */ + +#ifdef RFCNB_DEBUG + RFCNB_Print_Pkt(stderr, "rcvd", pkt, read_len); +#endif + + return(read_len); + + } + + /* Now, if we got at least a hdr size, alloc space for rest, if we need it */ + + pkt_len = RFCNB_Pkt_Len(hdr); + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Reading Pkt: Length = %i\n", pkt_len); +#endif + + /* Now copy in the hdr */ + + memcpy(pkt -> data, hdr, sizeof(hdr)); + + /* Get the rest of the packet ... first figure out how big our buf is? */ + /* And make sure that we handle the fragments properly ... Sure should */ + /* use an iovec ... */ + + if (len < pkt_len) /* Only get as much as we have space for */ + more = len - RFCNB_Pkt_Hdr_Len; + else + more = pkt_len; + + this_time = 0; + + /* We read for each fragment ... */ + + if (pkt -> len == read_len){ /* If this frag was exact size */ + pkt_frag = pkt -> next; /* Stick next lot in next frag */ + offset = 0; /* then we start at 0 in next */ + } + else { + pkt_frag = pkt; /* Otherwise use rest of this frag */ + offset = RFCNB_Pkt_Hdr_Len; /* Otherwise skip the header */ + } + + frag_len = pkt_frag -> len; + + if (more <= frag_len) /* If len left to get less than frag space */ + this_len = more; /* Get the rest ... */ + else + this_len = frag_len - offset; + + while (more > 0) { + + if ((this_time = read(con -> fd, (pkt_frag -> data) + offset, this_len)) <= 0) { /* Problems */ + + if (errno == EINTR) { + + RFCNB_errno = RFCNB_Timeout; + + } + else { + if (this_time < 0) + RFCNB_errno = RFCNBE_BadRead; + else + RFCNB_errno = RFCNBE_ConGone; + } + + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Frag_Len = %i, this_time = %i, this_len = %i, more = %i\n", frag_len, + this_time, this_len, more); +#endif + + read_len = read_len + this_time; /* How much have we read ... */ + + /* Now set up the next part */ + + if (pkt_frag -> next == NULL) break; /* That's it here */ + + pkt_frag = pkt_frag -> next; + this_len = pkt_frag -> len; + offset = 0; + + more = more - this_time; + + } + +#ifdef RFCNB_DEBUG + fprintf(stderr,"Pkt Len = %i, read_len = %i\n", pkt_len, read_len); + RFCNB_Print_Pkt(stderr, "rcvd", pkt, read_len + sizeof(hdr)); +#endif + + if (read_len < (pkt_len + sizeof(hdr))) { /* Discard the rest */ + + return(RFCNB_Discard_Rest(con, (pkt_len + sizeof(hdr)) - read_len)); + + } + + if (RFCNB_Timeout > 0) + alarm(0); /* Reset that sucker */ + + return(read_len + sizeof(RFCNB_Hdr)); +} diff --git a/daemon/rfcnb/rfcnb-io.h b/daemon/rfcnb/rfcnb-io.h new file mode 100644 index 0000000..9af8e90 --- /dev/null +++ b/daemon/rfcnb/rfcnb-io.h @@ -0,0 +1,28 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB IO Routines Defines + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +int RFCNB_Put_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len); + +int RFCNB_Get_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len); diff --git a/daemon/rfcnb/rfcnb-priv.h b/daemon/rfcnb/rfcnb-priv.h new file mode 100644 index 0000000..3541c0e --- /dev/null +++ b/daemon/rfcnb/rfcnb-priv.h @@ -0,0 +1,151 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB Defines + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* Defines we need */ + +typedef unsigned short uint16; + +#define GLOBAL extern + +#include "rfcnb-error.h" +#include "rfcnb-common.h" +#include "byteorder.h" + +#ifdef RFCNB_PORT +#define RFCNB_Default_Port RFCNB_PORT +#else +#define RFCNB_Default_Port 139 +#endif + +#define RFCNB_MAX_STATS 1 + +/* Protocol defines we need */ + +#define RFCNB_SESSION_MESSAGE 0 +#define RFCNB_SESSION_REQUEST 0x81 +#define RFCNB_SESSION_ACK 0x82 +#define RFCNB_SESSION_REJ 0x83 +#define RFCNB_SESSION_RETARGET 0x84 +#define RFCNB_SESSION_KEEP_ALIVE 0x85 + +/* Structures */ + +typedef struct redirect_addr * redirect_ptr; + +struct redirect_addr { + + struct in_addr ip_addr; + int port; + redirect_ptr next; + +}; + +typedef struct RFCNB_Con { + + int fd; /* File descripter for TCP/IP connection */ + int err; /* last error */ + int timeout; /* How many milli-secs before IO times out */ + int redirects; /* How many times we were redirected */ + struct redirect_addr *redirect_list; /* First is first address */ + struct redirect_addr *last_addr; + +} RFCNB_Con; + +typedef char RFCNB_Hdr[4]; /* The header is 4 bytes long with */ + /* char[0] as the type, char[1] the */ + /* flags, and char[2..3] the length */ + +/* Macros to extract things from the header. These are for portability + between architecture types where we are worried about byte order */ + +#define RFCNB_Pkt_Hdr_Len 4 +#define RFCNB_Pkt_Sess_Len 72 +#define RFCNB_Pkt_Retarg_Len 10 +#define RFCNB_Pkt_Nack_Len 5 +#define RFCNB_Pkt_Type_Offset 0 +#define RFCNB_Pkt_Flags_Offset 1 +#define RFCNB_Pkt_Len_Offset 2 /* Length is 2 bytes plus a flag bit */ +#define RFCNB_Pkt_N1Len_Offset 4 +#define RFCNB_Pkt_Called_Offset 5 +#define RFCNB_Pkt_N2Len_Offset 38 +#define RFCNB_Pkt_Calling_Offset 39 +#define RFCNB_Pkt_Error_Offset 4 +#define RFCNB_Pkt_IP_Offset 4 +#define RFCNB_Pkt_Port_Offset 8 + +/* The next macro isolates the length of a packet, including the bit in the + flags */ + +#define RFCNB_Pkt_Len(p) (PVAL(p, 3) | (PVAL(p, 2) << 8) | \ + ((PVAL(p, RFCNB_Pkt_Flags_Offset) & 0x01) << 16)) + +#define RFCNB_Put_Pkt_Len(p, v) (p[1] = ((v >> 16) & 1)); \ + (p[2] = ((v >> 8) & 0xFF)); \ + (p[3] = (v & 0xFF)); + +#define RFCNB_Pkt_Type(p) (CVAL(p, RFCNB_Pkt_Type_Offset)) + +/*typedef struct RFCNB_Hdr { + + unsigned char type; + unsigned char flags; + int16 len; + + } RFCNB_Hdr; + +typedef struct RFCNB_Sess_Pkt { + unsigned char type; + unsigned char flags; + int16 length; + unsigned char n1_len; + char called_name[33]; + unsigned char n2_len; + char calling_name[33]; + } RFCNB_Sess_Pkt; + + +typedef struct RFCNB_Nack_Pkt { + + struct RFCNB_Hdr hdr; + unsigned char error; + + } RFCNB_Nack_Pkt; + +typedef struct RFCNB_Retarget_Pkt { + + struct RFCNB_Hdr hdr; + int dest_ip; + unsigned char port; + + } RFCNB_Redir_Pkt; */ + +/* Static variables */ + +/* Only declare this if not defined */ + +#ifndef RFCNB_ERRNO +extern int RFCNB_errno; +extern int RFCNB_saved_errno; /* Save this from point of error */ +#endif diff --git a/daemon/rfcnb/rfcnb-util.c b/daemon/rfcnb/rfcnb-util.c new file mode 100644 index 0000000..adcc092 --- /dev/null +++ b/daemon/rfcnb/rfcnb-util.c @@ -0,0 +1,532 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB Utility Routines ... + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "std-includes.h" +#include "rfcnb-priv.h" +#include "rfcnb-util.h" +#include "rfcnb-io.h" + +extern void (*Prot_Print_Routine)(); /* Pointer to protocol print routine */ + +/* Convert name and pad to 16 chars as needed */ +/* Name 1 is a C string with null termination, name 2 may not be */ +/* If SysName is true, then put a <00> on end, else space> */ + +void RFCNB_CvtPad_Name(char *name1, char *name2) + +{ char c, c1, c2; + int i, len; + + len = strlen(name1); + + for (i = 0; i < 16; i++) { + + if (i >= len) { + + c1 = 'C'; c2 = 'A'; /* CA is a space */ + + } else { + + c = name1[i]; + c1 = (char)((int)c/16 + (int)'A'); + c2 = (char)((int)c%16 + (int)'A'); + } + + name2[i*2] = c1; + name2[i*2+1] = c2; + + } + + name2[32] = 0; /* Put in the nll ...*/ + +} + +/* Converts an Ascii NB Name (16 chars) to an RFCNB Name (32 chars) + Uses the encoding in RFC1001. Each nibble of byte is added to 'A' + to produce the next byte in the name. + + This routine assumes that AName is 16 bytes long and that NBName has + space for 32 chars, so be careful ... + +*/ + +void RFCNB_AName_To_NBName(char *AName, char *NBName) + +{ char c, c1, c2; + int i; + + for (i=0; i < 16; i++) { + + c = AName[i]; + + c1 = (char)((c >> 4) + 'A'); + c2 = (char)((c & 0xF) + 'A'); + + NBName[i*2] = c1; + NBName[i*2+1] = c2; + } + + NBName[32] = 0; /* Put in a null */ + +} + +/* Do the reverse of the above ... */ + +void RFCNB_NBName_To_AName(char *NBName, char *AName) + +{ char c, c1, c2; + int i; + + for (i=0; i < 16; i++) { + + c1 = NBName[i*2]; + c2 = NBName[i*2+1]; + + c = (char)(((int)c1 - (int)'A') * 16 + ((int)c2 - (int)'A')); + + AName[i] = c; + + } + + AName[i] = 0; /* Put a null on the end ... */ + +} + +/* Print a string of bytes in HEX etc */ + +void RFCNB_Print_Hex(FILE *fd, struct RFCNB_Pkt *pkt, int Offset, int Len) + +{ char c1, c2, outbuf1[33]; + unsigned char c; + int i, j; + struct RFCNB_Pkt *pkt_ptr = pkt; + static char Hex_List[17] = "0123456789ABCDEF"; + + j = 0; + + /* We only want to print as much as sepcified in Len */ + + while (pkt_ptr != NULL) { + + for (i = 0; + i < ((Len > (pkt_ptr -> len)?pkt_ptr -> len:Len) - Offset); + i++) { + + c = pkt_ptr -> data[i + Offset]; + c1 = Hex_List[c >> 4]; + c2 = Hex_List[c & 0xF]; + + outbuf1[j++] = c1; outbuf1[j++] = c2; + + if (j == 32){ /* Print and reset */ + outbuf1[j] = 0; + fprintf(fd, " %s\n", outbuf1); + j = 0; + } + + } + + Offset = 0; + Len = Len - pkt_ptr -> len; /* Reduce amount by this much */ + pkt_ptr = pkt_ptr -> next; + + } + + /* Print last lot in the buffer ... */ + + if (j > 0) { + + outbuf1[j] = 0; + fprintf(fd, " %s\n", outbuf1); + + } + + fprintf(fd, "\n"); + +} + +/* Get a packet of size n */ + +struct RFCNB_Pkt *RFCNB_Alloc_Pkt(int n) + +{ RFCNB_Pkt *pkt; + + if ((pkt = (struct RFCNB_Pkt *)malloc(sizeof(struct RFCNB_Pkt))) == NULL) { + + RFCNB_errno = RFCNBE_NoSpace; + RFCNB_saved_errno = errno; + return(NULL); + + } + + pkt -> next = NULL; + pkt -> len = n; + + if (n == 0) return(pkt); + + if ((pkt -> data = (char *)malloc(n)) == NULL) { + + RFCNB_errno = RFCNBE_NoSpace; + RFCNB_saved_errno = errno; + free(pkt); + return(NULL); + + } + + return(pkt); + +} + +/* Free up a packet */ + +int RFCNB_Free_Pkt(struct RFCNB_Pkt *pkt) + +{ struct RFCNB_Pkt *pkt_next; char *data_ptr; + + while (pkt != NULL) { + + pkt_next = pkt -> next; + + data_ptr = pkt -> data; + + if (data_ptr != NULL) + free(data_ptr); + + free(pkt); + + pkt = pkt_next; + + } + +} + +/* Print an RFCNB packet */ + +void RFCNB_Print_Pkt(FILE *fd, char *dirn, struct RFCNB_Pkt *pkt, int len) + +{ char lname[17]; + + /* We assume that the first fragment is the RFCNB Header */ + /* We should loop through the fragments printing them out */ + + fprintf(fd, "RFCNB Pkt %s:", dirn); + + switch (RFCNB_Pkt_Type(pkt -> data)) { + + case RFCNB_SESSION_MESSAGE: + + fprintf(fd, "SESSION MESSAGE: Length = %i\n", RFCNB_Pkt_Len(pkt -> data)); + RFCNB_Print_Hex(fd, pkt, RFCNB_Pkt_Hdr_Len, +#ifdef RFCNB_PRINT_DATA + RFCNB_Pkt_Len(pkt -> data) - RFCNB_Pkt_Hdr_Len); +#else + 40); +#endif + + if (Prot_Print_Routine != 0) { /* Print the rest of the packet */ + + Prot_Print_Routine(fd, strcmp(dirn, "sent"), pkt, RFCNB_Pkt_Hdr_Len, + RFCNB_Pkt_Len(pkt -> data) - RFCNB_Pkt_Hdr_Len); + + } + + break; + + case RFCNB_SESSION_REQUEST: + + fprintf(fd, "SESSION REQUEST: Length = %i\n", + RFCNB_Pkt_Len(pkt -> data)); + RFCNB_NBName_To_AName((char *)(pkt -> data + RFCNB_Pkt_Called_Offset), lname); + fprintf(fd, " Called Name: %s\n", lname); + RFCNB_NBName_To_AName((char *)(pkt -> data + RFCNB_Pkt_Calling_Offset), lname); + fprintf(fd, " Calling Name: %s\n", lname); + + break; + + case RFCNB_SESSION_ACK: + + fprintf(fd, "RFCNB SESSION ACK: Length = %i\n", + RFCNB_Pkt_Len(pkt -> data)); + + break; + + case RFCNB_SESSION_REJ: + fprintf(fd, "RFCNB SESSION REJECT: Length = %i\n", + RFCNB_Pkt_Len(pkt -> data)); + + if (RFCNB_Pkt_Len(pkt -> data) < 1) { + fprintf(fd, " Protocol Error, short Reject packet!\n"); + } + else { + fprintf(fd, " Error = %x\n", CVAL(pkt -> data, RFCNB_Pkt_Error_Offset)); + } + + break; + + case RFCNB_SESSION_RETARGET: + + fprintf(fd, "RFCNB SESSION RETARGET: Length = %i\n", + RFCNB_Pkt_Len(pkt -> data)); + + /* Print out the IP address etc and the port? */ + + break; + + case RFCNB_SESSION_KEEP_ALIVE: + + fprintf(fd, "RFCNB SESSION KEEP ALIVE: Length = %i\n", + RFCNB_Pkt_Len(pkt -> data)); + break; + + default: + + break; + } + +} + +/* Resolve a name into an address */ + +int RFCNB_Name_To_IP(char *host, struct in_addr *Dest_IP) + +{ int addr; /* Assumes IP4, 32 bit network addresses */ + struct hostent *hp; + + /* Use inet_addr to try to convert the address */ + + if ((addr = inet_addr(host)) == INADDR_NONE) { /* Oh well, a good try :-) */ + + /* Now try a name look up with gethostbyname */ + + if ((hp = gethostbyname(host)) == NULL) { /* Not in DNS */ + + /* Try NetBIOS name lookup, how the hell do we do that? */ + + RFCNB_errno = RFCNBE_BadName; /* Is this right? */ + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + else { /* We got a name */ + + memcpy((void *)Dest_IP, (void *)hp -> h_addr_list[0], sizeof(struct in_addr)); + + } + } + else { /* It was an IP address */ + + memcpy((void *)Dest_IP, (void *)&addr, sizeof(struct in_addr)); + + } + + return 0; + +} + +/* Disconnect the TCP connection to the server */ + +int RFCNB_Close(int socket) + +{ + + close(socket); + + /* If we want to do error recovery, here is where we put it */ + + return 0; + +} + +/* Connect to the server specified in the IP address. + Not sure how to handle socket options etc. */ + +int RFCNB_IP_Connect(struct in_addr Dest_IP, int port) + +{ struct sockaddr_in Socket; + int fd; + + /* Create a socket */ + + if ((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) { /* Handle the error */ + + RFCNB_errno = RFCNBE_BadSocket; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + } + + bzero((char *)&Socket, sizeof(Socket)); + memcpy((char *)&Socket.sin_addr, (char *)&Dest_IP, sizeof(Dest_IP)); + + Socket.sin_port = htons(port); + Socket.sin_family = PF_INET; + + /* Now connect to the destination */ + + if (connect(fd, (struct sockaddr *)&Socket, sizeof(Socket)) < 0) { /* Error */ + + close(fd); + RFCNB_errno = RFCNBE_ConnectFailed; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + } + + return(fd); + +} + +/* handle the details of establishing the RFCNB session with remote + end + +*/ + +int RFCNB_Session_Req(struct RFCNB_Con *con, + char *Called_Name, + char *Calling_Name, + BOOL *redirect, + struct in_addr *Dest_IP, + int * port) + +{ char *sess_pkt; + + /* Response packet should be no more than 9 bytes, make 16 jic */ + + char ln1[16], ln2[16], n1[32], n2[32], resp[16]; + int len; + struct RFCNB_Pkt *pkt, res_pkt; + + /* We build and send the session request, then read the response */ + + pkt = RFCNB_Alloc_Pkt(RFCNB_Pkt_Sess_Len); + + if (pkt == NULL) { + + return(RFCNBE_Bad); /* Leave the error that RFCNB_Alloc_Pkt gives) */ + + } + + sess_pkt = pkt -> data; /* Get pointer to packet proper */ + + sess_pkt[RFCNB_Pkt_Type_Offset] = RFCNB_SESSION_REQUEST; + RFCNB_Put_Pkt_Len(sess_pkt, RFCNB_Pkt_Sess_Len-RFCNB_Pkt_Hdr_Len); + sess_pkt[RFCNB_Pkt_N1Len_Offset] = 32; + sess_pkt[RFCNB_Pkt_N2Len_Offset] = 32; + + RFCNB_CvtPad_Name(Called_Name, (sess_pkt + RFCNB_Pkt_Called_Offset)); + RFCNB_CvtPad_Name(Calling_Name, (sess_pkt + RFCNB_Pkt_Calling_Offset)); + + /* Now send the packet */ + +#ifdef RFCNB_DEBUG + + fprintf(stderr, "Sending packet: "); + +#endif + + if ((len = RFCNB_Put_Pkt(con, pkt, RFCNB_Pkt_Sess_Len)) < 0) { + + return(RFCNBE_Bad); /* Should be able to write that lot ... */ + + } + +#ifdef RFCNB_DEBUG + + fprintf(stderr, "Getting packet.\n"); + +#endif + + res_pkt.data = resp; + res_pkt.len = sizeof(resp); + res_pkt.next = NULL; + + if ((len = RFCNB_Get_Pkt(con, &res_pkt, sizeof(resp))) < 0) { + + return(RFCNBE_Bad); + + } + + /* Now analyze the packet ... */ + + switch (RFCNB_Pkt_Type(resp)) { + + case RFCNB_SESSION_REJ: /* Didnt like us ... too bad */ + + /* Why did we get rejected ? */ + + switch (CVAL(resp,RFCNB_Pkt_Error_Offset)) { + + case 0x80: + RFCNB_errno = RFCNBE_CallRejNLOCN; + break; + case 0x81: + RFCNB_errno = RFCNBE_CallRejNLFCN; + break; + case 0x82: + RFCNB_errno = RFCNBE_CallRejCNNP; + break; + case 0x83: + RFCNB_errno = RFCNBE_CallRejInfRes; + break; + case 0x8F: + RFCNB_errno = RFCNBE_CallRejUnSpec; + break; + default: + RFCNB_errno = RFCNBE_ProtErr; + break; + } + + return(RFCNBE_Bad); + break; + + case RFCNB_SESSION_ACK: /* Got what we wanted ... */ + + return(0); + break; + + case RFCNB_SESSION_RETARGET: /* Go elsewhere */ + + *redirect = TRUE; /* Copy port and ip addr */ + + memcpy(Dest_IP, (resp + RFCNB_Pkt_IP_Offset), sizeof(struct in_addr)); + *port = SVAL(resp, RFCNB_Pkt_Port_Offset); + + return(0); + break; + + default: /* A protocol error */ + + RFCNB_errno = RFCNBE_ProtErr; + return(RFCNBE_Bad); + break; + } +} + + + + + + + + + diff --git a/daemon/rfcnb/rfcnb-util.h b/daemon/rfcnb/rfcnb-util.h new file mode 100644 index 0000000..b3f2315 --- /dev/null +++ b/daemon/rfcnb/rfcnb-util.h @@ -0,0 +1,50 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB Utility Defines + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +void RFCNB_CvtPad_Name(char *name1, char *name2); + +void RFCNB_AName_To_NBName(char *AName, char *NBName); + +void RFCNB_NBName_To_AName(char *NBName, char *AName); + +void RFCNB_Print_Hex(FILE *fd, struct RFCNB_Pkt *pkt, int Offset, int Len); + +struct RFCNB_Pkt *RFCNB_Alloc_Pkt(int n); + +void RFCNB_Print_Pkt(FILE *fd, char *dirn, struct RFCNB_Pkt *pkt, int len); + +int RFCNB_Name_To_IP(char *host, struct in_addr *Dest_IP); + +int RFCNB_Close(int socket); + +int RFCNB_IP_Connect(struct in_addr Dest_IP, int port); + +int RFCNB_Session_Req(struct RFCNB_Con *con, + char *Called_Name, + char *Calling_Name, + BOOL *redirect, + struct in_addr *Dest_IP, + int * port); + diff --git a/daemon/rfcnb/rfcnb.h b/daemon/rfcnb/rfcnb.h new file mode 100644 index 0000000..a7cfe1f --- /dev/null +++ b/daemon/rfcnb/rfcnb.h @@ -0,0 +1,48 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + RFCNB Defines + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* Error responses */ + +#include "rfcnb-error.h" +#include "rfcnb-common.h" + +/* Defines we need */ + +#define RFCNB_Default_Port 139 + +/* Definition of routines we define */ + +void *RFCNB_Call(char *Called_Name, char *Calling_Name, char *Called_Address, + int port); + +int RFCNB_Send(void *Con_Handle, struct RFCNB_Pkt *Data, int Length); + +int RFCNB_Recv(void *Con_Handle, struct RFCNB_Pkt *Data, int Length); + +int RFCNB_Hangup(void *con_Handle); + +void *RFCNB_Listen(); + +void RFCNB_Get_Error(char *buffer, int buf_len); diff --git a/daemon/rfcnb/session.c b/daemon/rfcnb/session.c new file mode 100644 index 0000000..981fda8 --- /dev/null +++ b/daemon/rfcnb/session.c @@ -0,0 +1,364 @@ +/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation + + Version 1.0 + Session Routines ... + + Copyright (C) Richard Sharpe 1996 + +*/ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +int RFCNB_errno = 0; +int RFCNB_saved_errno = 0; +#define RFCNB_ERRNO + +#include "std-includes.h" +#include <netinet/tcp.h> +#include "rfcnb-priv.h" +#include "rfcnb-util.h" + +int RFCNB_Stats[RFCNB_MAX_STATS]; + +void (*Prot_Print_Routine)() = NULL; /* Pointer to print routine */ + +/* Set up a session with a remote name. We are passed Called_Name as a + string which we convert to a NetBIOS name, ie space terminated, up to + 16 characters only if we need to. If Called_Address is not empty, then + we use it to connect to the remote end, but put in Called_Name ... Called + Address can be a DNS based name, or a TCP/IP address ... +*/ + +void *RFCNB_Call(char *Called_Name, char *Calling_Name, char *Called_Address, + int port) + +{ struct RFCNB_Con *con; + struct in_addr Dest_IP; + int Client; + BOOL redirect; struct redirect_addr *redir_addr; + char *Service_Address; + + /* Now, we really should look up the port in /etc/services ... */ + + if (port == 0) port = RFCNB_Default_Port; + + /* Create a connection structure first */ + + if ((con = (struct RFCNB_Con *)malloc(sizeof(struct RFCNB_Con))) == NULL) { /* Error in size */ + + RFCNB_errno = RFCNBE_NoSpace; + RFCNB_saved_errno = errno; + return(NULL); + + } + + con -> fd = -0; /* no descriptor yet */ + con -> err = 0; /* no error yet */ + con -> timeout = 0; /* no timeout */ + con -> redirects = 0; + + /* Resolve that name into an IP address */ + + Service_Address = Called_Name; + if (strcmp(Called_Address, "") != 0) { /* If the Called Address = "" */ + Service_Address = Called_Address; + } + + if ((errno = RFCNB_Name_To_IP(Service_Address, &Dest_IP)) < 0) { /* Error */ + + /* No need to modify RFCNB_errno as it was done by RFCNB_Name_To_IP */ + + return(NULL); + + } + + /* Now connect to the remote end */ + + redirect = TRUE; /* Fudge this one so we go once through */ + + while (redirect) { /* Connect and get session info etc */ + + redirect = FALSE; /* Assume all OK */ + + /* Build the redirect info. First one is first addr called */ + /* And tack it onto the list of addresses we called */ + + if ((redir_addr = (struct redirect_addr *)malloc(sizeof(struct redirect_addr))) == NULL) { /* Could not get space */ + + RFCNB_errno = RFCNBE_NoSpace; + RFCNB_saved_errno = errno; + return(NULL); + + } + + memcpy((char *)&(redir_addr -> ip_addr), (char *)&Dest_IP, sizeof(Dest_IP)); + redir_addr -> port = port; + redir_addr -> next = NULL; + + if (con -> redirect_list == NULL) { /* Stick on head */ + + con -> redirect_list = con -> last_addr = redir_addr; + + } else { + + con -> last_addr -> next = redir_addr; + con -> last_addr = redir_addr; + + } + + /* Now, make that connection */ + + if ((Client = RFCNB_IP_Connect(Dest_IP, port)) < 0) { /* Error */ + + /* No need to modify RFCNB_errno as it was done by RFCNB_IP_Connect */ + + return(NULL); + + } + + con -> fd = Client; + + /* Now send and handle the RFCNB session request */ + /* If we get a redirect, we will comeback with redirect true + and a new IP address in DEST_IP */ + + if ((errno = RFCNB_Session_Req(con, + Called_Name, + Calling_Name, + &redirect, &Dest_IP, &port)) < 0) { + + /* No need to modify RFCNB_errno as it was done by RFCNB_Session.. */ + + return(NULL); + + } + + if (redirect) { + + /* We have to close the connection, and then try again */ + + (con -> redirects)++; + + RFCNB_Close(con -> fd); /* Close it */ + + } + } + + return(con); + +} + +/* We send a packet to the other end ... for the moment, we treat the + data as a series of pointers to blocks of data ... we should check the + length ... */ + +int RFCNB_Send(struct RFCNB_Con *Con_Handle, struct RFCNB_Pkt *udata, int Length) + +{ struct RFCNB_Pkt *pkt; char *hdr; + int len; + + /* Plug in the header and send the data */ + + pkt = RFCNB_Alloc_Pkt(RFCNB_Pkt_Hdr_Len); + + if (pkt == NULL) { + + RFCNB_errno = RFCNBE_NoSpace; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + pkt -> next = udata; /* The user data we want to send */ + + hdr = pkt -> data; + + /* Following crap is for portability across multiple UNIX machines */ + + *(hdr + RFCNB_Pkt_Type_Offset) = RFCNB_SESSION_MESSAGE; + RFCNB_Put_Pkt_Len(hdr, Length); + +#ifdef RFCNB_DEBUG + + fprintf(stderr, "Sending packet: "); + +#endif + + if ((len = RFCNB_Put_Pkt(Con_Handle, pkt, Length + RFCNB_Pkt_Hdr_Len)) < 0) { + + /* No need to change RFCNB_errno as it was done by put_pkt ... */ + + return(RFCNBE_Bad); /* Should be able to write that lot ... */ + + } + + /* Now we have sent that lot, let's get rid of the RFCNB Header and return */ + + pkt -> next = NULL; + + RFCNB_Free_Pkt(pkt); + + return(len); + +} + +/* We pick up a message from the internet ... We have to worry about + non-message packets ... */ + +int RFCNB_Recv(void *con_Handle, struct RFCNB_Pkt *Data, int Length) + +{ struct RFCNB_Pkt *pkt; struct RFCNB_Hdr *hdr; + int ret_len; + + if (con_Handle == NULL){ + + RFCNB_errno = RFCNBE_BadHandle; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + /* Now get a packet from below. We allocate a header first */ + + /* Plug in the header and send the data */ + + pkt = RFCNB_Alloc_Pkt(RFCNB_Pkt_Hdr_Len); + + if (pkt == NULL) { + + RFCNB_errno = RFCNBE_NoSpace; + RFCNB_saved_errno = errno; + return(RFCNBE_Bad); + + } + + pkt -> next = Data; /* Plug in the data portion */ + + if ((ret_len = RFCNB_Get_Pkt(con_Handle, pkt, Length + RFCNB_Pkt_Hdr_Len)) < 0) { + +#ifdef RFCNB_DEBUG + fprintf(stderr, "Bad packet return in RFCNB_Recv... \n"); +#endif + + return(RFCNBE_Bad); + + } + + /* We should check that we go a message and not a keep alive */ + + pkt -> next = NULL; + + RFCNB_Free_Pkt(pkt); + + return(ret_len); + +} + +/* We just disconnect from the other end, as there is nothing in the RFCNB */ +/* protocol that specifies any exchange as far as I can see */ + +int RFCNB_Hangup(struct RFCNB_Con *con_Handle) + +{ + + if (con_Handle != NULL) { + RFCNB_Close(con_Handle -> fd); /* Could this fail? */ + free(con_Handle); + } + + return 0; + + +} + +/* Set TCP_NODELAY on the socket */ + +int RFCNB_Set_Sock_NoDelay(struct RFCNB_Con *con_Handle, BOOL yn) + +{ + + return(setsockopt(con_Handle -> fd, IPPROTO_TCP, TCP_NODELAY, + (char *)&yn, sizeof(yn))); + +} + + +/* Listen for a connection on a port???, when */ +/* the connection comes in, we return with the connection */ + +void *RFCNB_Listen() + +{ + +} + +/* Pick up the last error response as a string, hmmm, this routine should */ +/* have been different ... */ + +void RFCNB_Get_Error(char *buffer, int buf_len) + +{ + + if (RFCNB_saved_errno <= 0) { + sprintf(buffer, "%s", RFCNB_Error_Strings[RFCNB_errno]); + } + else { + sprintf(buffer, "%s\n\terrno:%s", RFCNB_Error_Strings[RFCNB_errno], + strerror(RFCNB_saved_errno)); + } + +} + +/* Pick up the last error response and returns as a code */ + +int RFCNB_Get_Last_Error() + +{ + + return(RFCNB_errno); + +} + +/* Pick up saved errno as well */ + +int RFCNB_Get_Last_Errno() + +{ + + return(RFCNB_saved_errno); + +} + +/* Pick up the last error response and return in string ... */ + +int RFCNB_Get_Error_Msg(int code, char *msg_buf, int len) + +{ + + strncpy(msg_buf, RFCNB_Error_Strings[abs(code)], len); + +} + +/* Register a higher level protocol print routine */ + +void RFCNB_Register_Print_Routine(void (*fn)()) + +{ + + Prot_Print_Routine = fn; + +} diff --git a/daemon/rfcnb/std-includes.h b/daemon/rfcnb/std-includes.h new file mode 100644 index 0000000..e90e60a --- /dev/null +++ b/daemon/rfcnb/std-includes.h @@ -0,0 +1,45 @@ +/* RFCNB Standard includes ... */ +/* + + RFCNB Standard Includes + + Copyright (C) 1996, Richard Sharpe + +/* One day we will conditionalize these on OS types ... */ + +/* + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#define BOOL int +typedef short int16; + +#include <netdb.h> +#include <sys/types.h> +#include <netinet/in.h> +#include <sys/socket.h> +#include <signal.h> +#include <errno.h> +#include <stdio.h> +#include <unistd.h> + +#define TRUE 1 +#define FALSE 0 + +/* Pick up define for INADDR_NONE */ + +#ifndef INADDR_NONE +#define INADDR_NONE -1 +#endif diff --git a/daemon/rfcnb/x_Makefile b/daemon/rfcnb/x_Makefile new file mode 100644 index 0000000..97a01be --- /dev/null +++ b/daemon/rfcnb/x_Makefile @@ -0,0 +1,38 @@ +# Find the LDFLAGS entry for your system type and uncomment it ... + +CC = gcc + +#CFLAGS = -g -DRFCNB_DEBUG +# Uncomment the above and recomment the below if you want debugging +CFLAGS = -g + +#CFLAGS = -g -DRFCNB_DEBUG -DRFCNB_PRINT_DATA +# Different LDFLAGS for different systems: +# ULTRIX and Digital UNIX (OSF/1) +# LDFALGS = +# +# Linux +# LDFLAGS = +# +# Solaris and maybe SunOS??? +# LDFLAGS = -lsocket -lnsl +# +# HP-UX ??? +# LDFLAGS = ??? + +INCLUDES = rfcnb.h rfcnb-priv.h rfcnb-util.h rfcnb-io.h + +.SUFFIXES: .c .o .h + +all: test_rfcnb + +.c.o: $(INCLUDES) + @echo Compiling $*.c + @$(CC) $(CFLAGS) -c $*.c + +test_rfcnb: test_rfcnb.o session.o rfcnb-util.o rfcnb-io.o + $(CC) $(CFLAGS) $(LDFLAGS) -o test_rfcnb test_rfcnb.o session.o rfcnb-util.o rfcnb-io.o + +clean: + rm *.o test_rfcnb + |