/* $OpenBSD: req.c,v 1.32 2005/10/07 21:47:32 reyk Exp $ */ /* * Copyright (c) 2004 Jean-Francois Brousseau * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include "buf.h" #include "cvs.h" #include "log.h" #include "proto.h" extern char *cvs_rootstr; extern int cvs_compress; extern char *cvs_rsh; extern int cvs_trace; extern int cvs_nolog; extern int cvs_readonly; static int cvs_req_set(int, char *); static int cvs_req_noop(int, char *); static int cvs_req_root(int, char *); static int cvs_req_validreq(int, char *); static int cvs_req_validresp(int, char *); static int cvs_req_expandmod(int, char *); static int cvs_req_directory(int, char *); static int cvs_req_useunchanged(int, char *); static int cvs_req_case(int, char *); static int cvs_req_argument(int, char *); static int cvs_req_globalopt(int, char *); static int cvs_req_gzipstream(int, char *); static int cvs_req_entry(int, char *); static int cvs_req_filestate(int, char *); static int cvs_req_command(int, char *); struct cvs_reqhdlr { int (*hdlr)(int, char *); } cvs_req_swtab[CVS_REQ_MAX + 1] = { { NULL }, { cvs_req_root }, { cvs_req_validreq }, { cvs_req_validresp }, { cvs_req_directory }, { NULL }, { NULL }, { NULL }, { cvs_req_entry }, { NULL }, { NULL }, /* 10 */ { cvs_req_filestate }, { cvs_req_filestate }, { cvs_req_filestate }, { cvs_req_useunchanged }, { NULL }, { NULL }, { cvs_req_filestate }, { cvs_req_case }, { NULL }, { cvs_req_argument }, /* 20 */ { cvs_req_argument }, { cvs_req_globalopt }, { cvs_req_gzipstream }, { NULL }, { NULL }, { NULL }, { NULL }, { NULL }, { NULL }, { NULL }, /* 30 */ { NULL }, { NULL }, { NULL }, { cvs_req_set }, { cvs_req_expandmod }, { cvs_req_command }, { NULL }, { NULL }, { NULL }, { NULL }, /* 40 */ { NULL }, { NULL }, { NULL }, { NULL }, { cvs_req_command }, { cvs_req_command }, { NULL }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, /* 50 */ { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, /* 60 */ { NULL }, { cvs_req_command }, { cvs_req_command }, { cvs_req_noop }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, { cvs_req_command }, }; /* * Argument array built by `Argument' and `Argumentx' requests. */ static char *cvs_req_args[CVS_PROTO_MAXARG]; /* start at 1, because 0 will be the command name */ static int cvs_req_nargs = 1; static char *cvs_req_modulename; static char *cvs_req_rootpath; static char *cvs_req_currentdir; extern char cvs_server_tmpdir[MAXPATHLEN]; static CVSENTRIES *cvs_req_entf; /* * cvs_req_handle() * * Generic request handler dispatcher. The handler expects the first line * of the command as single argument. * Returns the return value of the command on success, or -1 on failure. */ int cvs_req_handle(char *line) { char *cp, *cmd; struct cvs_req *req; cmd = line; cp = strchr(cmd, ' '); if (cp != NULL) *(cp++) = '\0'; req = cvs_req_getbyname(cmd); if (req == NULL) return (-1); else if (cvs_req_swtab[req->req_id].hdlr == NULL) { cvs_log(LP_ERR, "handler for `%s' not implemented", cmd); return (-1); } return (*cvs_req_swtab[req->req_id].hdlr)(req->req_id, cp); } /* * cvs_req_noop() */ static int cvs_req_noop(int reqid, char *line) { int ret; ret = cvs_sendresp(CVS_RESP_OK, NULL); if (ret < 0) return (-1); return (0); } static int cvs_req_root(int reqid, char *line) { if (cvs_req_rootpath != NULL) { cvs_log(LP_ERR, "duplicate Root request received"); cvs_printf("Protocol error: Duplicate Root request"); return (-1); } cvs_req_rootpath = strdup(line); if (cvs_req_rootpath == NULL) { cvs_log(LP_ERRNO, "failed to copy Root path"); return (-1); } cvs_rootstr = cvs_req_rootpath; return (0); } static int cvs_req_validreq(int reqid, char *line) { char *vreq; vreq = cvs_req_getvalid(); if (vreq == NULL) return (-1); if ((cvs_sendresp(CVS_RESP_VALIDREQ, vreq) < 0) || (cvs_sendresp(CVS_RESP_OK, NULL) < 0)) return (-1); return (0); } static int cvs_req_validresp(int reqid, char *line) { char *sp, *ep; struct cvs_resp *resp; sp = line; do { ep = strchr(sp, ' '); if (ep != NULL) *(ep++) = '\0'; resp = cvs_resp_getbyname(sp); if (resp != NULL) ; if (ep != NULL) sp = ep + 1; } while (ep != NULL); return (0); } static int cvs_req_directory(int reqid, char *line) { int pwd; size_t dirlen; char rdir[MAXPATHLEN]; char *repo, *s, *p; pwd = (!strcmp(line, ".")); if (cvs_getln(NULL, rdir, sizeof(rdir)) < 0) return (-1); if (cvs_req_currentdir != NULL) free(cvs_req_currentdir); cvs_req_currentdir = strdup(rdir); if (cvs_req_currentdir == NULL) { cvs_log(LP_ERR, "failed to duplicate directory"); return (-1); } dirlen = strlen(cvs_req_currentdir); /* * Lets make sure we always start at the correct * directory. */ if (cvs_chdir(cvs_server_tmpdir) == -1) return (-1); /* * Set repository path. */ if (strlen(cvs_req_rootpath) < dirlen) { s = cvs_req_currentdir + strlen(cvs_req_rootpath) + 1; if (s >= (cvs_req_currentdir + dirlen)) { cvs_log(LP_ERR, "you're bad, go away"); return (-1); } } else s = cvs_req_currentdir; if ((repo = strdup(s)) == NULL) { cvs_log(LP_ERR, "failed to save repository path"); return (-1); } /* * Skip back "foo/bar" part, so we can feed the repo * as a startpoint for cvs_create_dir(). */ if (!pwd) { s = repo + strlen(repo) - strlen(line) - 1; if (*s != '/') { cvs_log(LP_ERR, "malformed directory"); free(repo); return (-1); } *s = '\0'; } /* * Obtain the modulename, we only need to do this at * the very first time we get a Directory request. */ if (cvs_req_modulename == NULL) { if ((p = strchr(repo, '/')) != NULL) *p = '\0'; if ((cvs_req_modulename = strdup(repo)) == NULL) { cvs_log(LP_ERR, "failed to save modulename"); free(repo); return (-1); } if (p != NULL) *p = '/'; /* * Now, create the admin files in the top-level * directory for the temp repo. */ if (cvs_mkadmin(cvs_server_tmpdir, cvs_rootstr, repo, NULL, NULL, 0) < 0) { cvs_log(LP_ERR, "failed to create admin files"); free(repo); return (-1); } } /* * create the directory plus the administrative files. */ if (cvs_create_dir(line, 1, cvs_rootstr, repo) < 0) { free(repo); return (-1); } /* * cvs_create_dir() has already put us in the correct directory * so now open it's Entry file for incoming files. */ if (cvs_req_entf != NULL) cvs_ent_close(cvs_req_entf); cvs_req_entf = cvs_ent_open(".", O_RDWR); if (cvs_req_entf == NULL) { cvs_log(LP_ERR, "failed to open Entry file for %s", line); free(repo); return (-1); } free(repo); return (0); } static int cvs_req_entry(int reqid, char *line) { struct cvs_ent *ent; /* parse received entry */ if ((ent = cvs_ent_parse(line)) == NULL) return (-1); /* add it to the entry file and done */ if (cvs_ent_add(cvs_req_entf, ent) < 0) { cvs_log(LP_ERR, "failed to add '%s' to the Entry file", ent->ce_name); return (-1); } /* XXX */ cvs_ent_write(cvs_req_entf); return (0); } /* * cvs_req_filestate() * * Handler for the `Modified', `Is-Modified', `Unchanged' and `Questionable' * requests, which are all used to report the assumed state of a file from the * client. */ static int cvs_req_filestate(int reqid, char *line) { int ret; mode_t fmode; BUF *fdata; struct cvs_ent *ent; ret = 0; switch (reqid) { case CVS_REQ_MODIFIED: fdata = cvs_recvfile(NULL, &fmode); if (fdata == NULL) return (-1); /* write the file */ if (cvs_buf_write(fdata, line, fmode) < 0) { cvs_log(LP_ERR, "failed to create file %s", line); cvs_buf_free(fdata); return (-1); } cvs_buf_free(fdata); break; case CVS_REQ_ISMODIFIED: break; case CVS_REQ_UNCHANGED: ent = cvs_ent_get(cvs_req_entf, line); if (ent == NULL) { cvs_log(LP_ERR, "received Unchanged request " "for a non-existing file"); ret = -1; } else { ent->ce_status = CVS_ENT_UPTODATE; } break; case CVS_REQ_QUESTIONABLE: cvs_printf("? %s\n", line); break; default: cvs_log(LP_ERR, "wrong request id type"); ret = -1; break; } /* XXX */ cvs_req_entf->cef_flags &= ~CVS_ENTF_SYNC; cvs_ent_write(cvs_req_entf); return (ret); } /* * cvs_req_expandmod() * */ static int cvs_req_expandmod(int reqid, char *line) { int ret; ret = cvs_sendresp(CVS_RESP_OK, NULL); if (ret < 0) return (-1); return (0); } /* * cvs_req_useunchanged() * * Handler for the `UseUnchanged' requests. The protocol documentation * specifies that this request must be supported by the server and must be * sent by the client, though it gives no clue regarding its use. */ static int cvs_req_useunchanged(int reqid, char *line) { return (0); } /* * cvs_req_case() * * Handler for the `Case' requests, which toggles case sensitivity ON or OFF */ static int cvs_req_case(int reqid, char *line) { cvs_nocase = 1; return (0); } static int cvs_req_set(int reqid, char *line) { char *cp, *lp; if ((lp = strdup(line)) == NULL) { cvs_log(LP_ERRNO, "failed to copy Set argument"); return (-1); } if ((cp = strchr(lp, '=')) == NULL) { cvs_log(LP_ERR, "error in Set request " "(no = in variable assignment)"); free(lp); return (-1); } *(cp++) = '\0'; if (cvs_var_set(lp, cp) < 0) { free(lp); return (-1); } free(lp); return (0); } static int cvs_req_argument(int reqid, char *line) { char *nap; if (cvs_req_nargs == CVS_PROTO_MAXARG) { cvs_log(LP_ERR, "too many arguments"); return (-1); } if (reqid == CVS_REQ_ARGUMENT) { cvs_req_args[cvs_req_nargs] = strdup(line); if (cvs_req_args[cvs_req_nargs] == NULL) { cvs_log(LP_ERRNO, "failed to copy argument"); return (-1); } cvs_req_nargs++; } else if (reqid == CVS_REQ_ARGUMENTX) { if (cvs_req_nargs == 0) cvs_log(LP_WARN, "no argument to append to"); else { asprintf(&nap, "%s%s", cvs_req_args[cvs_req_nargs - 1], line); if (nap == NULL) { cvs_log(LP_ERRNO, "failed to append to argument"); return (-1); } free(cvs_req_args[cvs_req_nargs - 1]); cvs_req_args[cvs_req_nargs - 1] = nap; } } return (0); } static int cvs_req_globalopt(int reqid, char *line) { if ((*line != '-') || (*(line + 2) != '\0')) { cvs_log(LP_ERR, "invalid `Global_option' request format"); return (-1); } switch (*(line + 1)) { case 'l': cvs_nolog = 1; break; case 'n': cvs_noexec = 1; break; case 'Q': verbosity = 0; break; case 'q': if (verbosity > 1) verbosity = 1; break; case 'r': cvs_readonly = 1; break; case 't': cvs_trace = 1; break; default: cvs_log(LP_ERR, "unknown global option `%s'", line); return (-1); } return (0); } /* * cvs_req_gzipstream() * * Handler for the `Gzip-stream' request, which enables compression at the * level given along with the request. After this request has been processed, * all further connection data should be compressed. */ static int cvs_req_gzipstream(int reqid, char *line) { char *ep; long val; val = strtol(line, &ep, 10); if ((line[0] == '\0') || (*ep != '\0')) { cvs_log(LP_ERR, "invalid Gzip-stream level `%s'", line); return (-1); } else if ((errno == ERANGE) && ((val < 0) || (val > 9))) { cvs_log(LP_ERR, "Gzip-stream level %ld out of range", val); return (-1); } cvs_compress = (int)val; return (0); } /* * cvs_req_command() * * Generic request handler for CVS command requests (i.e. diff, update, tag). */ static int cvs_req_command(int reqid, char *line) { int ret = 0; struct cvs_cmd *cmdp; cmdp = cvs_findcmdbyreq(reqid); if (cmdp == NULL) { cvs_sendresp(CVS_RESP_ERROR, NULL); return (-1); } /* close the Entry file if it's still open */ if (cvs_req_entf != NULL) cvs_ent_close(cvs_req_entf); /* fill in the command name */ cvs_req_args[0] = cmdp->cmd_name; /* switch to the correct directory */ if (cmdp->cmd_op != CVS_OP_VERSION) { if (cvs_chdir(cvs_server_tmpdir) == -1) return (-1); } ret = cvs_startcmd(cmdp, cvs_req_nargs, cvs_req_args); if (ret == 0) ret = cvs_sendresp(CVS_RESP_OK, NULL); return (ret); }