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#include "headers.h"
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int
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4 |
smbsendunicode(SmbPeerInfo *i)
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{
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return smbglobals.unicode && (i == nil || (i->capabilities & CAP_UNICODE) != 0);
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}
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int
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smbcheckwordcount(char *name, SmbHeader *h, ushort wordcount)
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{
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if (h->wordcount != wordcount) {
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smblogprint(-1, "smb%s: word count not %ud\n", name, wordcount);
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return 0;
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}
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return 1;
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}
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int
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smbcheckwordandbytecount(char *name, SmbHeader *h, ushort wordcount, uchar **bdatap, uchar **edatap)
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{
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ushort bytecount;
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uchar *bdata;
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if (h->wordcount != wordcount) {
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smblogprint(-1, "smb%s: word count not %ud\n", name, wordcount);
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return 0;
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}
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bdata = *bdatap;
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if (bdata + 2 > *edatap) {
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smblogprint(-1, "smb%s: not enough data for byte count\n", name);
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return 0;
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}
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bytecount = smbnhgets(bdata); bdata += 2;
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if (bdata + bytecount > *edatap) {
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smblogprint(-1, "smb%s: not enough data for bytes\n", name);
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return 0;
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}
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*edatap = bdata + bytecount;
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*bdatap = bdata;
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return 1;
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}
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SmbProcessResult
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smbchaincommand(SmbSession *s, SmbHeader *h, ulong andxoffsetfixup, uchar cmd, ushort offset, SmbBuffer *b)
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{
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SmbOpTableEntry *ote;
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uchar *pdata;
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ushort bytecount;
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49 |
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h->command = cmd;
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ote = smboptable + cmd;
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if (ote->process == nil) {
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smblogprint(-1, "smbchaincommand: %s (0x%.2ux) not implemented\n", ote->name, cmd);
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return SmbProcessResultUnimp;
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}
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if (!smbresponsealignl2(s, 2)
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|| !smbresponseoffsetputs(s, andxoffsetfixup, smbresponseoffset(s))
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|| !smbbufferpopreadlimit(b))
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return SmbProcessResultMisc;
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if (!smbbufferreadskipto(b, offset)) {
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smblogprint(-1, "smbchaincommand: illegal offset\n");
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return SmbProcessResultFormat;
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}
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if (!smbbuffergetb(b, &h->wordcount)) {
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smblogprint(-1, "smbchaincommand: not enough space for wordcount\n");
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return SmbProcessResultFormat;
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}
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pdata = smbbufferreadpointer(b);
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if (!smbbuffergetbytes(b, nil, h->wordcount * 2)) {
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smblogprint(-1, "smbchaincommand: not enough space for parameters\n");
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return SmbProcessResultFormat;
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}
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if (!smbbuffergets(b, &bytecount)) {
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smblogprint(-1, "smbchaincommand: not enough space for bytecount\n");
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return SmbProcessResultFormat;
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}
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if (!smbbufferpushreadlimit(b, smbbufferreadoffset(b) + bytecount)) {
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smblogprint(-1, "smbchaincommand: not enough space for bytes\n");
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return SmbProcessResultFormat;
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}
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smblogprint(cmd, "chaining to %s\n", ote->name);
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return (*ote->process)(s, h, pdata, b);
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}
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int
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smbbuffergetheader(SmbBuffer *b, SmbHeader *h, uchar **parametersp, ushort *bytecountp)
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{
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SmbOpTableEntry *ote;
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SmbRawHeader *rh;
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rh = (SmbRawHeader *)smbbufferreadpointer(b);
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if (!smbbuffergetbytes(b, nil, (long)offsetof(SmbRawHeader, parameterwords[0]))) {
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smblogprint(-1, "smbgetheader: short packet\n");
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return 0;
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}
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if (rh->protocol[0] != 0xff || memcmp(rh->protocol + 1, "SMB", 3) != 0) {
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smblogprint(-1, "smbgetheader: invalid protocol\n");
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return 0;
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}
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h->command = rh->command;
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ote = smboptable + h->command;
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if (ote->name == nil) {
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smblogprint(-1, "smbgetheader: illegal opcode 0x%.2ux\n", h->command);
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return 0;
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}
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h->errclass = rh->status[0];
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h->error = smbnhgets(rh->status + 2);
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h->flags = rh->flags;
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h->flags2 = smbnhgets(rh->flags2);
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if (h->flags & ~(SmbHeaderFlagCaseless | SMB_FLAGS_SERVER_TO_REDIR | SmbHeaderFlagReserved | SmbHeaderFlagServerIgnore))
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smblogprint(-1, "smbgetheader: warning: unexpected flags 0x%.2ux\n", h->flags);
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h->wordcount = rh->wordcount;
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if (parametersp)
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*parametersp = smbbufferreadpointer(b);
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if (!smbbuffergetbytes(b, nil, h->wordcount * 2)) {
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smblogprint(-1, "smbgetheader: not enough data for parameter words\n");
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return 0;
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}
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h->tid = smbnhgets(rh->tid);
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h->pid = smbnhgets(rh->pid);
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h->uid = smbnhgets(rh->uid);
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h->mid = smbnhgets(rh->mid);
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if (!smbbuffergets(b, bytecountp))
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*bytecountp = 0;
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if (!smbbufferpushreadlimit(b, smbbufferreadoffset(b) + *bytecountp))
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return 0;
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126 |
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smblogprint(h->command, "%s %s: tid 0x%.4ux pid 0x%.4ux uid 0x%.4ux mid 0x%.4ux\n", ote->name,
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(h->flags & SMB_FLAGS_SERVER_TO_REDIR) ? "response" : "request", h->tid, h->pid, h->uid, h->mid);
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return 1;
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}
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131 |
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int
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smbcheckheaderdirection(SmbHeader *h, int response, char **errmsgp)
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{
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if (((h->flags & SMB_FLAGS_SERVER_TO_REDIR) == 0) == response) {
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smbstringprint(errmsgp, "unexpected %s", response ? "request" : "response");
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return 0;
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}
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return 1;
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}
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int
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smbcheckheader(SmbHeader *h, uchar command, int response, char **errmsgp)
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{
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if (response && h->command != command) {
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smbstringprint(errmsgp, "sent %.2uc request, got %.2ux response", command, h->command);
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return 0;
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}
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if (!smbcheckheaderdirection(h, response, errmsgp))
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return 0;
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return 1;
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}
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153 |
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int
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smbbuffergetandcheckheader(SmbBuffer *b, SmbHeader *h, uchar command, int response, uchar **pdatap, ushort *bytecountp, char **errmsgp)
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{
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if (!smbbuffergetheader(b, h, pdatap, bytecountp)) {
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smbstringprint(errmsgp, "smbbuffergetandcheckheader: not enough data for header");
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return 0;
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}
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return smbcheckheader(h, command, response, errmsgp);
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}
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int
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smbsuccess(SmbHeader *h, char **errmsgp)
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{
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if (h->errclass != SUCCESS) {
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smbstringprint(errmsgp, "%s returned error %d/%d", smboptable[h->command].name, h->errclass, h->error);
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return 0;
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}
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return 1;
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}
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173 |
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#define BASE_FLAGS (0)
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175 |
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int
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smbbufferputheader(SmbBuffer *b, SmbHeader *h, SmbPeerInfo *p)
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{
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SmbRawHeader *rh;
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if (offsetof(SmbRawHeader, parameterwords[0]) > smbbufferwritespace(b))
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return 0;
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if (smbbufferwriteoffset(b) == 0) {
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rh = (SmbRawHeader *)smbbufferwritepointer(b);
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rh->protocol[0] = 0xff;
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memcpy(rh->protocol + 1, "SMB", 3);
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rh->flags = SMB_FLAGS_SERVER_TO_REDIR | SmbHeaderFlagCaseless;
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rh->command = h->command;
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smbhnputs(rh->flags2, BASE_FLAGS | (smbsendunicode(p) ? SMB_FLAGS2_UNICODE : 0));
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memset(rh->extra, 0, sizeof(rh->extra));
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if (!smbbufferputbytes(b, nil, offsetof(SmbRawHeader, parameterwords[0])))
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return 0;
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rh->wordcount = h->wordcount;
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}
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else {
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rh = (SmbRawHeader *)smbbufferreadpointer(b);
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smbbufferputb(b, h->wordcount);
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}
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rh->status[0] = h->errclass;
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rh->status[1] = 0;
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smbhnputs(rh->status + 2, h->error);
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smbhnputs(rh->tid, h->tid);
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smbhnputs(rh->pid, h->pid);
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smbhnputs(rh->uid, h->uid);
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smbhnputs(rh->mid, h->mid);
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return 1;
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}
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207 |
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int
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smbbufferputerror(SmbBuffer *s, SmbHeader *h, SmbPeerInfo *p, uchar errclass, ushort error)
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{
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h->errclass = errclass;
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h->error = error;
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return smbbufferputheader(s, h, p);
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}
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215 |
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int
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217 |
smbbufferputandxheader(SmbBuffer *b, SmbHeader *h, SmbPeerInfo *p, uchar andxcommand, ulong *andxoffsetfixupp)
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218 |
{
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219 |
if (!smbbufferputheader(b, h, p)
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220 |
|| !smbbufferputb(b, andxcommand)
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|| !smbbufferputb(b, 0))
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222 |
return 0;
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223 |
*andxoffsetfixupp = smbbufferwriteoffset(b);
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224 |
return smbbufferputbytes(b, nil, 2);
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}
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226 |
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227 |
void
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228 |
smbseterror(SmbSession *s, uchar errclass, ushort error)
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{
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s->errclass = errclass;
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231 |
s->error = error;
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232 |
}
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233 |
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234 |
SmbProcessResult
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235 |
smbbufferputack(SmbBuffer *b, SmbHeader *h, SmbPeerInfo *p)
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236 |
{
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237 |
h->wordcount = 0;
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238 |
return smbbufferputheader(b, h, p) && smbbufferputs(b, 0) ? SmbProcessResultReply : SmbProcessResultMisc;
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239 |
}
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240 |
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241 |
ushort
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242 |
smbplan9mode2dosattr(ulong mode)
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243 |
{
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244 |
if (mode & DMDIR)
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245 |
return SMB_ATTR_DIRECTORY;
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246 |
return SMB_ATTR_NORMAL;
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}
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248 |
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249 |
ulong
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250 |
smbdosattr2plan9mode(ushort attr)
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251 |
{
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252 |
ulong mode = 0444;
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253 |
if ((attr & SMB_ATTR_READ_ONLY) == 0)
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254 |
mode |= 0222;
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255 |
if (attr & SMB_ATTR_DIRECTORY) {
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256 |
mode |= DMDIR | 0711;
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257 |
mode &= DMDIR | 0755;
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258 |
}
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259 |
else
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260 |
mode &= 0744;
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261 |
return mode;
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262 |
}
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263 |
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264 |
ulong
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265 |
smbdosattr2plan9wstatmode(ulong oldmode, ushort attr)
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266 |
{
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267 |
ulong mode;
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268 |
if (oldmode & DMDIR)
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269 |
attr |= SMB_ATTR_DIRECTORY;
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270 |
else
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271 |
attr &= ~SMB_ATTR_DIRECTORY;
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272 |
mode = smbdosattr2plan9mode(attr);
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273 |
if (oldmode & 0444)
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274 |
mode = (mode & ~0444) | (mode & 0444);
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275 |
if ((attr & SMB_ATTR_READ_ONLY) == 0)
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276 |
mode |= oldmode & 0222;
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277 |
if (mode == oldmode)
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278 |
mode = 0xffffffff;
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279 |
return mode;
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280 |
}
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281 |
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282 |
ulong
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283 |
smbplan9length2size32(vlong length)
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284 |
{
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285 |
if (length > 0xffffffff)
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286 |
return 0xffffffff;
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287 |
return length;
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288 |
}
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289 |
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290 |
vlong
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291 |
smbl2roundupvlong(vlong v, int l2)
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292 |
{
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293 |
uvlong mask;
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294 |
mask = (1 << l2) - 1;
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295 |
return (v + mask) & ~mask;
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296 |
}
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297 |
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298 |
SmbSlut smbsharemodeslut[] = {
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299 |
{ "compatibility", SMB_OPEN_MODE_SHARE_COMPATIBILITY },
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300 |
{ "exclusive", SMB_OPEN_MODE_SHARE_EXCLUSIVE },
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301 |
{ "denywrite", SMB_OPEN_MODE_SHARE_DENY_WRITE },
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302 |
{ "denyread", SMB_OPEN_MODE_SHARE_DENY_READOREXEC },
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303 |
{ "denynone", SMB_OPEN_MODE_SHARE_DENY_NONE },
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304 |
{ 0 }
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305 |
};
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306 |
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307 |
SmbSlut smbopenmodeslut[] = {
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308 |
{ "oread", OREAD },
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309 |
{ "owrite", OWRITE },
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310 |
{ "ordwr", ORDWR },
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311 |
{ "oexec", OEXEC },
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312 |
{ 0 }
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313 |
};
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314 |
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315 |
int
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316 |
smbslut(SmbSlut *s, char *pat)
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317 |
{
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318 |
while (s->name) {
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319 |
if (cistrcmp(s->name, pat) == 0)
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320 |
return s->val;
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321 |
s++;
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322 |
}
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323 |
return -1;
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324 |
}
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325 |
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326 |
char *
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327 |
smbrevslut(SmbSlut *s, int val)
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328 |
{
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|
329 |
while (s->name) {
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|
330 |
if (s->val == val)
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331 |
return s->name;
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332 |
s++;
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333 |
}
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|
334 |
return nil;
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|
335 |
}
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