29ad26f932
Use mchain API to work with mbuf chains. Do not depend on INET and IPX options. Allocate ncp_rq structure dynamically to prevent possible stack overflows. Let ncp_request() dispose control structure if request failed. Move all NCP wrappers to ncp_ncp.c file and all NCP request processing functions to ncp_rq.c file. Improve reconnection logic. Misc style fixes.
393 lines
9.9 KiB
C
393 lines
9.9 KiB
C
/*
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* Copyright (c) 1999, 2000, 2001 Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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* Core of NCP protocol
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*/
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/signalvar.h>
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#include <sys/mbuf.h>
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#include <sys/uio.h>
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#include <netipx/ipx.h>
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#include <netipx/ipx_var.h>
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#include <netncp/ncp.h>
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#include <netncp/ncp_conn.h>
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#include <netncp/ncp_sock.h>
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#include <netncp/ncp_subr.h>
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#include <netncp/ncp_ncp.h>
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#include <netncp/ncp_rq.h>
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#include <netncp/nwerror.h>
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#ifdef NCP_DATA_DEBUG
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static
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void m_dumpm(struct mbuf *m) {
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char *p;
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int len;
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printf("d=");
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while(m) {
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p=mtod(m,char *);
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len=m->m_len;
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printf("(%d)",len);
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while(len--){
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printf("%02x ",((int)*(p++)) & 0xff);
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}
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m=m->m_next;
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};
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printf("\n");
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}
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#endif /* NCP_DATA_DEBUG */
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int
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ncp_chkintr(struct ncp_conn *conn, struct proc *p)
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{
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sigset_t tmpset;
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if (p == NULL)
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return 0;
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tmpset = p->p_siglist;
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SIGSETNAND(tmpset, p->p_sigmask);
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SIGSETNAND(tmpset, p->p_sigignore);
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if (SIGNOTEMPTY(p->p_siglist) && NCP_SIGMASK(tmpset))
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return EINTR;
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return 0;
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}
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/*
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* Process initial NCP handshake (attach)
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* NOTE: Since all functions below may change conn attributes, they
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* should be called with LOCKED connection, also they use procp & ucred
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*/
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int
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ncp_ncp_connect(struct ncp_conn *conn)
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{
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struct ncp_rq *rqp;
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struct ncp_rphdr *rp;
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int error;
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error = ncp_rq_alloc_any(NCP_ALLOC_SLOT, 0, conn, conn->procp, conn->ucred, &rqp);
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if (error)
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return error;
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conn->flags &= ~(NCPFL_INVALID | NCPFL_SIGNACTIVE | NCPFL_SIGNWANTED
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| NCPFL_ATTACHED);
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conn->seq = 0;
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error = ncp_request_int(rqp);
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if (!error) {
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rp = mtod(rqp->rp.md_top, struct ncp_rphdr*);
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conn->connid = rp->conn_low + (rp->conn_high << 8);
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}
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ncp_rq_done(rqp);
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if (error)
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return error;
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conn->flags |= NCPFL_ATTACHED | NCPFL_WASATTACHED;
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return 0;
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}
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int
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ncp_ncp_disconnect(struct ncp_conn *conn)
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{
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struct ncp_rq *rqp;
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int error;
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NCPSDEBUG("for connid=%d\n",conn->nc_id);
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#ifdef NCPBURST
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ncp_burst_disconnect(conn);
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#endif
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if (conn->flags & NCPFL_ATTACHED) {
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error = ncp_rq_alloc_any(NCP_FREE_SLOT, 0, conn, conn->procp, conn->ucred, &rqp);
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if (!error) {
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ncp_request_int(rqp);
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ncp_rq_done(rqp);
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}
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}
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conn->flags |= NCPFL_INVALID;
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ncp_sock_disconnect(conn);
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return 0;
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}
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/*
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* All negotiation functions expect a locked connection
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*/
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int
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ncp_negotiate_buffersize(struct ncp_conn *conn, int size, int *target)
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{
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struct ncp_rq *rqp;
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u_int16_t bsize;
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int error;
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error = ncp_rq_alloc(0x21, conn, conn->procp, conn->ucred, &rqp);
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if (error)
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return error;
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mb_put_uint16be(&rqp->rq, size);
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error = ncp_request(rqp);
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if (error)
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return error;
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md_get_uint16be(&rqp->rp, &bsize);
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*target = min(bsize, size);
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ncp_rq_done(rqp);
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return error;
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}
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static int
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ncp_negotiate_size_and_options(struct ncp_conn *conn, int size, int options,
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int *ret_size, u_int8_t *ret_options)
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{
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struct ncp_rq *rqp;
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u_int16_t rs;
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int error;
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error = ncp_rq_alloc(0x61, conn, conn->procp, conn->ucred, &rqp);
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if (error)
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return error;
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mb_put_uint16be(&rqp->rq, size);
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mb_put_uint8(&rqp->rq, options);
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rqp->nr_minrplen = 2 + 2 + 1;
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error = ncp_request(rqp);
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if (error)
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return error;
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md_get_uint16be(&rqp->rp, &rs);
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*ret_size = (rs == 0) ? size : min(rs, size);
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md_get_uint16be(&rqp->rp, &rs); /* skip echo socket */
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md_get_uint8(&rqp->rp, ret_options);
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ncp_rq_done(rqp);
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return error;
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}
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int
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ncp_renegotiate_connparam(struct ncp_conn *conn, int buffsize, u_int8_t in_options)
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{
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u_int8_t options;
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int neg_buffsize, error, sl, ckslevel, ilen;
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sl = conn->li.sig_level;
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if (sl >= 2)
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in_options |= NCP_SECURITY_LEVEL_SIGN_HEADERS;
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if (conn->li.saddr.sa_family == AF_IPX) {
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ilen = sizeof(ckslevel);
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error = ncp_sysctlbyname("net.ipx.ipx.checksum", &ckslevel, &ilen,
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NULL, 0, NULL);
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if (error)
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return error;
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if (ckslevel == 2)
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in_options |= NCP_IPX_CHECKSUM;
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}
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error = ncp_negotiate_size_and_options(conn, buffsize, in_options,
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&neg_buffsize, &options);
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if (!error) {
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if (conn->li.saddr.sa_family == AF_IPX &&
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((options ^ in_options) & NCP_IPX_CHECKSUM)) {
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if (ckslevel == 2) {
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printf("Server refuses to support IPX checksums\n");
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return NWE_REQUESTER_FAILURE;
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}
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in_options |= NCP_IPX_CHECKSUM;
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error = 1;
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}
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if ((options ^ in_options) & 2) {
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if (sl == 0 || sl == 3)
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return NWE_SIGNATURE_LEVEL_CONFLICT;
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if (sl == 1) {
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in_options |= NCP_SECURITY_LEVEL_SIGN_HEADERS;
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error = 1;
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}
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}
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if (error) {
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error = ncp_negotiate_size_and_options(conn,
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buffsize, in_options, &neg_buffsize, &options);
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if ((options ^ in_options) & 3) {
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return NWE_SIGNATURE_LEVEL_CONFLICT;
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}
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}
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} else {
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in_options &= ~NCP_SECURITY_LEVEL_SIGN_HEADERS;
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error = ncp_negotiate_buffersize(conn, NCP_DEFAULT_BUFSIZE,
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&neg_buffsize);
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}
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if (error) return error;
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if ((neg_buffsize < 512) || (neg_buffsize > NCP_MAX_BUFSIZE))
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return EINVAL;
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conn->buffer_size = neg_buffsize;
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if (in_options & NCP_SECURITY_LEVEL_SIGN_HEADERS)
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conn->flags |= NCPFL_SIGNWANTED;
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if (conn->li.saddr.sa_family == AF_IPX)
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ncp_sock_checksum(conn, in_options & NCP_IPX_CHECKSUM);
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return 0;
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}
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void
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ncp_check_rq(struct ncp_conn *conn){
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return;
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if (conn->flags & NCPFL_INTR) return;
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/* first, check for signals */
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if (ncp_chkintr(conn,conn->procp)) {
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conn->flags |= NCPFL_INTR;
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}
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return;
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}
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int
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ncp_get_bindery_object_id(struct ncp_conn *conn,
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u_int16_t object_type, char *object_name,
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struct ncp_bindery_object *target,
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struct proc *p,struct ucred *cred)
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{
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struct ncp_rq *rqp;
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int error;
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error = ncp_rq_alloc_subfn(23, 53, conn, conn->procp, conn->ucred, &rqp);
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mb_put_uint16be(&rqp->rq, object_type);
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ncp_rq_pstring(rqp, object_name);
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rqp->nr_minrplen = 54;
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error = ncp_request(rqp);
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if (error)
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return error;
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md_get_uint32be(&rqp->rp, &target->object_id);
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md_get_uint16be(&rqp->rp, &target->object_type);
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md_get_mem(&rqp->rp, (caddr_t)target->object_name, 48, MB_MSYSTEM);
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ncp_rq_done(rqp);
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return 0;
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}
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int
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ncp_read(struct ncp_conn *conn, ncp_fh *file, struct uio *uiop, struct ucred *cred)
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{
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struct ncp_rq *rqp;
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struct mbchain *mbp;
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u_int16_t retlen = 0 ;
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int error = 0, len = 0, tsiz, burstio;
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tsiz = uiop->uio_resid;
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#ifdef NCPBURST
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burstio = (ncp_burst_enabled && tsiz > conn->buffer_size);
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#else
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burstio = 0;
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#endif
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while (tsiz > 0) {
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if (!burstio) {
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len = min(4096 - (uiop->uio_offset % 4096), tsiz);
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len = min(len, conn->buffer_size);
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error = ncp_rq_alloc(72, conn, uiop->uio_procp, cred, &rqp);
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if (error)
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break;
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mbp = &rqp->rq;
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mb_put_uint8(mbp, 0);
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mb_put_mem(mbp, (caddr_t)file, 6, MB_MSYSTEM);
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mb_put_uint32be(mbp, uiop->uio_offset);
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mb_put_uint16be(mbp, len);
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rqp->nr_minrplen = 2;
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error = ncp_request(rqp);
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if (error)
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break;
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md_get_uint16be(&rqp->rp, &retlen);
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if (uiop->uio_offset & 1)
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md_get_mem(&rqp->rp, NULL, 1, MB_MSYSTEM);
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error = md_get_uio(&rqp->rp, uiop, retlen);
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ncp_rq_done(rqp);
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} else {
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#ifdef NCPBURST
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error = ncp_burst_read(conn, file, tsiz, &len, &retlen, uiop, cred);
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#endif
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}
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if (error)
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break;
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tsiz -= retlen;
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if (retlen < len)
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break;
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}
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return (error);
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}
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int
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ncp_write(struct ncp_conn *conn, ncp_fh *file, struct uio *uiop, struct ucred *cred)
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{
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struct ncp_rq *rqp;
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struct mbchain *mbp;
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int error = 0, len, tsiz, backup;
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if (uiop->uio_iovcnt != 1) {
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printf("%s: can't handle iovcnt>1 !!!\n", __FUNCTION__);
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return EIO;
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}
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tsiz = uiop->uio_resid;
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while (tsiz > 0) {
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len = min(4096 - (uiop->uio_offset % 4096), tsiz);
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len = min(len, conn->buffer_size);
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if (len == 0) {
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printf("gotcha!\n");
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}
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/* rq head */
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error = ncp_rq_alloc(73, conn, uiop->uio_procp, cred, &rqp);
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if (error)
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break;
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mbp = &rqp->rq;
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mb_put_uint8(mbp, 0);
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mb_put_mem(mbp, (caddr_t)file, 6, MB_MSYSTEM);
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mb_put_uint32be(mbp, uiop->uio_offset);
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mb_put_uint16be(mbp, len);
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error = mb_put_uio(mbp, uiop, len);
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if (error) {
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ncp_rq_done(rqp);
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break;
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}
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error = ncp_request(rqp);
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if (!error)
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ncp_rq_done(rqp);
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if (len == 0)
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break;
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if (error) {
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backup = len;
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uiop->uio_iov->iov_base -= backup;
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uiop->uio_iov->iov_len += backup;
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uiop->uio_offset -= backup;
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uiop->uio_resid += backup;
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break;
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}
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tsiz -= len;
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}
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if (error)
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uiop->uio_resid = tsiz;
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switch (error) {
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case NWE_INSUFFICIENT_SPACE:
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error = ENOSPC;
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break;
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}
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return (error);
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}
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