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url.c

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00001 /*@-type@*/ /* LCL: function typedefs */
00006 #include "system.h"
00007 
00008 #include <netinet/in.h>
00009 
00010 #include <rpmmacro.h>
00011 #include <rpmmessages.h>
00012 #include <rpmio_internal.h>
00013 
00014 #include "debug.h"
00015 
00016 /*@access FD_t@*/               /* XXX compared with NULL */
00017 /*@access urlinfo@*/
00018 
00019 #ifndef IPPORT_FTP
00020 #define IPPORT_FTP      21
00021 #endif
00022 #ifndef IPPORT_HTTP
00023 #define IPPORT_HTTP     80
00024 #endif
00025 
00028 /*@unchecked@*/
00029 int _url_iobuf_size = RPMURL_IOBUF_SIZE;
00030 
00033 /*@unchecked@*/
00034 int _url_debug = 0;
00035 
00036 #define URLDBG(_f, _m, _x)      if ((_url_debug | (_f)) & (_m)) fprintf _x
00037 
00038 #define URLDBGIO(_f, _x)        URLDBG((_f), RPMURL_DEBUG_IO, _x)
00039 #define URLDBGREFS(_f, _x)      URLDBG((_f), RPMURL_DEBUG_REFS, _x)
00040 
00043 /*@unchecked@*/
00044 /*@only@*/ /*@null@*/
00045 urlinfo *_url_cache = NULL;
00046 
00049 /*@unchecked@*/
00050 int _url_count = 0;
00051 
00057 /*@unused@*/ static inline /*@null@*/ void *
00058 _free(/*@only@*/ /*@null@*/ const void * p) /*@modifies p@*/
00059 {
00060     if (p != NULL)      free((void *)p);
00061     return NULL;
00062 }
00063 
00064 urlinfo XurlLink(urlinfo u, const char *msg, const char *file, unsigned line)
00065 {
00066     URLSANE(u);
00067     u->nrefs++;
00068 /*@-modfilesys@*/
00069 URLDBGREFS(0, (stderr, "--> url %p ++ %d %s at %s:%u\n", u, u->nrefs, msg, file, line));
00070 /*@=modfilesys@*/
00071     /*@-refcounttrans@*/ return u; /*@=refcounttrans@*/
00072 }
00073 
00074 urlinfo XurlNew(const char *msg, const char *file, unsigned line)
00075 {
00076     urlinfo u;
00077     if ((u = xmalloc(sizeof(*u))) == NULL)
00078         return NULL;
00079     memset(u, 0, sizeof(*u));
00080     u->proxyp = -1;
00081     u->port = -1;
00082     u->urltype = URL_IS_UNKNOWN;
00083     u->ctrl = NULL;
00084     u->data = NULL;
00085     u->bufAlloced = 0;
00086     u->buf = NULL;
00087     u->httpHasRange = 1;
00088     u->httpVersion = 0;
00089     u->nrefs = 0;
00090     u->magic = URLMAGIC;
00091     return XurlLink(u, msg, file, line);
00092 }
00093 
00094 urlinfo XurlFree(urlinfo u, const char *msg, const char *file, unsigned line)
00095 {
00096     int xx;
00097 
00098     URLSANE(u);
00099 URLDBGREFS(0, (stderr, "--> url %p -- %d %s at %s:%u\n", u, u->nrefs, msg, file, line));
00100     if (--u->nrefs > 0)
00101         /*@-refcounttrans -retalias@*/ return u; /*@=refcounttrans =retalias@*/
00102     if (u->ctrl) {
00103 #ifndef NOTYET
00104         void * fp = fdGetFp(u->ctrl);
00105         /*@-branchstate@*/
00106         if (fp) {
00107             fdPush(u->ctrl, fpio, fp, -1);   /* Push fpio onto stack */
00108             (void) Fclose(u->ctrl);
00109         } else if (fdio->_fileno(u->ctrl) >= 0)
00110             xx = fdio->close(u->ctrl);
00111         /*@=branchstate@*/
00112 #else
00113         (void) Fclose(u->ctrl);
00114 #endif
00115 
00116         u->ctrl = fdio->_fdderef(u->ctrl, "persist ctrl (urlFree)", file, line);
00117         /*@-usereleased@*/
00118         if (u->ctrl)
00119             fprintf(stderr, _("warning: u %p ctrl %p nrefs != 0 (%s %s)\n"),
00120                         u, u->ctrl, (u->host ? u->host : ""),
00121                         (u->service ? u->service : ""));
00122         /*@=usereleased@*/
00123     }
00124     if (u->data) {
00125 #ifndef NOTYET
00126         void * fp = fdGetFp(u->data);
00127         if (fp) {
00128             fdPush(u->data, fpio, fp, -1);   /* Push fpio onto stack */
00129             (void) Fclose(u->data);
00130         } else if (fdio->_fileno(u->data) >= 0)
00131             xx = fdio->close(u->data);
00132 #else
00133         (void) Fclose(u->ctrl);
00134 #endif
00135 
00136         u->data = fdio->_fdderef(u->data, "persist data (urlFree)", file, line);
00137         /*@-usereleased@*/
00138         if (u->data)
00139             fprintf(stderr, _("warning: u %p data %p nrefs != 0 (%s %s)\n"),
00140                         u, u->data, (u->host ? u->host : ""),
00141                         (u->service ? u->service : ""));
00142         /*@=usereleased@*/
00143     }
00144     u->buf = _free(u->buf);
00145     u->url = _free(u->url);
00146     u->service = _free((void *)u->service);
00147     u->user = _free((void *)u->user);
00148     u->password = _free((void *)u->password);
00149     u->host = _free((void *)u->host);
00150     u->portstr = _free((void *)u->portstr);
00151     u->proxyu = _free((void *)u->proxyu);
00152     u->proxyh = _free((void *)u->proxyh);
00153 
00154     /*@-refcounttrans@*/ u = _free(u); /*@-refcounttrans@*/
00155     return NULL;
00156 }
00157 
00158 void urlFreeCache(void)
00159 {
00160     if (_url_cache) {
00161         int i;
00162         for (i = 0; i < _url_count; i++) {
00163             if (_url_cache[i] == NULL) continue;
00164             _url_cache[i] = urlFree(_url_cache[i], "_url_cache");
00165             if (_url_cache[i])
00166                 fprintf(stderr,
00167                         _("warning: _url_cache[%d] %p nrefs(%d) != 1 (%s %s)\n"),
00168                         i, _url_cache[i], _url_cache[i]->nrefs,
00169                         (_url_cache[i]->host ? _url_cache[i]->host : ""),
00170                         (_url_cache[i]->service ? _url_cache[i]->service : ""));
00171         }
00172     }
00173     _url_cache = _free(_url_cache);
00174     _url_count = 0;
00175 }
00176 
00177 static int urlStrcmp(/*@null@*/ const char * str1, /*@null@*/ const char * str2)
00178         /*@*/
00179 {
00180     if (str1 && str2)
00181         /*@-nullpass@*/         /* LCL: 2nd arg claims to be NULL */
00182         return strcmp(str1, str2);
00183         /*@=nullpass@*/
00184     if (str1 != str2)
00185         return -1;
00186     return 0;
00187 }
00188 
00189 /*@-mods@*/
00190 static void urlFind(/*@null@*/ /*@in@*/ /*@out@*/ urlinfo * uret, int mustAsk)
00191         /*@globals rpmGlobalMacroContext,
00192                 fileSystem@*/
00193         /*@modifies *uret, rpmGlobalMacroContext,
00194                 fileSystem @*/
00195 {
00196     urlinfo u;
00197     int ucx;
00198     int i = 0;
00199 
00200     if (uret == NULL)
00201         return;
00202 
00203     u = *uret;
00204     URLSANE(u);
00205 
00206     ucx = -1;
00207     for (i = 0; i < _url_count; i++) {
00208         urlinfo ou = NULL;
00209         if (_url_cache == NULL || (ou = _url_cache[i]) == NULL) {
00210             if (ucx < 0)
00211                 ucx = i;
00212             continue;
00213         }
00214 
00215         /* Check for cache-miss condition. A cache miss is
00216          *    a) both items are not NULL and don't compare.
00217          *    b) either of the items is not NULL.
00218          */
00219         if (urlStrcmp(u->service, ou->service))
00220             continue;
00221         if (urlStrcmp(u->host, ou->host))
00222             continue;
00223         if (urlStrcmp(u->user, ou->user))
00224             continue;
00225         if (urlStrcmp(u->portstr, ou->portstr))
00226             continue;
00227         break;  /* Found item in cache */
00228     }
00229 
00230     if (i == _url_count) {
00231         if (ucx < 0) {
00232             ucx = _url_count++;
00233             _url_cache = xrealloc(_url_cache, sizeof(*_url_cache) * _url_count);
00234         }
00235         if (_url_cache)         /* XXX always true */
00236             _url_cache[ucx] = urlLink(u, "_url_cache (miss)");
00237         u = urlFree(u, "urlSplit (urlFind miss)");
00238     } else {
00239         ucx = i;
00240         u = urlFree(u, "urlSplit (urlFind hit)");
00241     }
00242 
00243     /* This URL is now cached. */
00244 
00245     if (_url_cache)             /* XXX always true */
00246         u = urlLink(_url_cache[ucx], "_url_cache");
00247     *uret = u;
00248     /*@-usereleased@*/
00249     u = urlFree(u, "_url_cache (urlFind)");
00250     /*@=usereleased@*/
00251 
00252     /* Zap proxy host and port in case they have been reset */
00253     u->proxyp = -1;
00254     u->proxyh = _free(u->proxyh);
00255 
00256     /* Perform one-time FTP initialization */
00257     if (u->urltype == URL_IS_FTP) {
00258 
00259         if (mustAsk || (u->user != NULL && u->password == NULL)) {
00260             const char * host = (u->host ? u->host : "");
00261             const char * user = (u->user ? u->user : "");
00262             char * prompt;
00263             prompt = alloca(strlen(host) + strlen(user) + 256);
00264             sprintf(prompt, _("Password for %s@%s: "), user, host);
00265             u->password = _free(u->password);
00266             u->password = /*@-unrecog@*/ getpass(prompt) /*@=unrecog@*/;
00267             u->password = xstrdup(u->password); /* XXX xstrdup has side effects. */
00268         }
00269 
00270         if (u->proxyh == NULL) {
00271             const char *proxy = rpmExpand("%{_ftpproxy}", NULL);
00272             if (proxy && *proxy != '%') {
00273                 /*@observer@*/ const char * host = (u->host ? u->host : "");
00274                 const char *uu = (u->user ? u->user : "anonymous");
00275                 char *nu = xmalloc(strlen(uu) + sizeof("@") + strlen(host));
00276                 (void) stpcpy( stpcpy( stpcpy(nu, uu), "@"), host);
00277                 u->proxyu = nu;
00278                 u->proxyh = xstrdup(proxy);
00279             }
00280             proxy = _free(proxy);
00281         }
00282 
00283         if (u->proxyp < 0) {
00284             const char *proxy = rpmExpand("%{_ftpport}", NULL);
00285             if (proxy && *proxy != '%') {
00286                 char *end;
00287                 int port = strtol(proxy, &end, 0);
00288                 if (!(end && *end == '\0')) {
00289                     fprintf(stderr, _("error: %sport must be a number\n"),
00290                         (u->service ? u->service : ""));
00291                     return;
00292                 }
00293                 u->proxyp = port;
00294             }
00295             proxy = _free(proxy);
00296         }
00297     }
00298 
00299     /* Perform one-time HTTP initialization */
00300     if (u->urltype == URL_IS_HTTP) {
00301 
00302         if (u->proxyh == NULL) {
00303             const char *proxy = rpmExpand("%{_httpproxy}", NULL);
00304             if (proxy && *proxy != '%')
00305                 u->proxyh = xstrdup(proxy);
00306             proxy = _free(proxy);
00307         }
00308 
00309         if (u->proxyp < 0) {
00310             const char *proxy = rpmExpand("%{_httpport}", NULL);
00311             if (proxy && *proxy != '%') {
00312                 char *end;
00313                 int port = strtol(proxy, &end, 0);
00314                 if (!(end && *end == '\0')) {
00315                     fprintf(stderr, _("error: %sport must be a number\n"),
00316                         (u->service ? u->service : ""));
00317                     return;
00318                 }
00319                 u->proxyp = port;
00320             }
00321             proxy = _free(proxy);
00322         }
00323 
00324     }
00325 
00326     return;
00327 }
00328 /*@=mods@*/
00329 
00332 /*@observer@*/ /*@unchecked@*/
00333 static struct urlstring {
00334 /*@observer@*/ /*@null@*/ const char * leadin;
00335     urltype     ret;
00336 } urlstrings[] = {
00337     { "file://",        URL_IS_PATH },
00338     { "ftp://",         URL_IS_FTP },
00339     { "http://",        URL_IS_HTTP },
00340     { "-",              URL_IS_DASH },
00341     { NULL,             URL_IS_UNKNOWN }
00342 };
00343 
00344 urltype urlIsURL(const char * url)
00345 {
00346     struct urlstring *us;
00347 
00348     if (url && *url) {
00349         for (us = urlstrings; us->leadin != NULL; us++) {
00350             if (strncmp(url, us->leadin, strlen(us->leadin)))
00351                 continue;
00352             return us->ret;
00353         }
00354     }
00355 
00356     return URL_IS_UNKNOWN;
00357 }
00358 
00359 /* Return path portion of url (or pointer to NUL if url == NULL) */
00360 urltype urlPath(const char * url, const char ** pathp)
00361 {
00362     const char *path;
00363     int urltype;
00364 
00365     path = url;
00366     urltype = urlIsURL(url);
00367     /*@-branchstate@*/
00368     switch (urltype) {
00369     case URL_IS_FTP:
00370         url += sizeof("ftp://") - 1;
00371         path = strchr(url, '/');
00372         if (path == NULL) path = url + strlen(url);
00373         break;
00374     case URL_IS_HTTP:
00375     case URL_IS_PATH:
00376         url += sizeof("file://") - 1;
00377         path = strchr(url, '/');
00378         if (path == NULL) path = url + strlen(url);
00379         break;
00380     case URL_IS_UNKNOWN:
00381         if (path == NULL) path = "";
00382         break;
00383     case URL_IS_DASH:
00384         path = "";
00385         break;
00386     }
00387     /*@=branchstate@*/
00388     if (pathp)
00389         /*@-observertrans@*/
00390         *pathp = path;
00391         /*@=observertrans@*/
00392     return urltype;
00393 }
00394 
00395 /*
00396  * Split URL into components. The URL can look like
00397  *      service://user:password@host:port/path
00398  */
00399 /*@-modfilesys@*/
00400 int urlSplit(const char * url, urlinfo *uret)
00401 {
00402     urlinfo u;
00403     char *myurl;
00404     char *s, *se, *f, *fe;
00405 
00406     if (uret == NULL)
00407         return -1;
00408     if ((u = urlNew("urlSplit")) == NULL)
00409         return -1;
00410 
00411     if ((se = s = myurl = xstrdup(url)) == NULL) {
00412         u = urlFree(u, "urlSplit (error #1)");
00413         return -1;
00414     }
00415 
00416     u->url = xstrdup(url);
00417     u->urltype = urlIsURL(url);
00418 
00419     while (1) {
00420         /* Point to end of next item */
00421         while (*se && *se != '/') se++;
00422         /* Item was service. Save service and go for the rest ...*/
00423         if (*se && (se != s) && se[-1] == ':' && se[0] == '/' && se[1] == '/') {
00424                 se[-1] = '\0';
00425             u->service = xstrdup(s);
00426             se += 2;    /* skip over "//" */
00427             s = se++;
00428             continue;
00429         }
00430         
00431         /* Item was everything-but-path. Continue parse on rest */
00432         *se = '\0';
00433         break;
00434     }
00435 
00436     /* Look for ...@host... */
00437     fe = f = s;
00438     while (*fe && *fe != '@') fe++;
00439     /*@-branchstate@*/
00440     if (*fe == '@') {
00441         s = fe + 1;
00442         *fe = '\0';
00443         /* Look for user:password@host... */
00444         while (fe > f && *fe != ':') fe--;
00445         if (*fe == ':') {
00446             *fe++ = '\0';
00447             u->password = xstrdup(fe);
00448         }
00449         u->user = xstrdup(f);
00450     }
00451     /*@=branchstate@*/
00452 
00453     /* Look for ...host:port */
00454     fe = f = s;
00455     while (*fe && *fe != ':') fe++;
00456     if (*fe == ':') {
00457         *fe++ = '\0';
00458         u->portstr = xstrdup(fe);
00459         if (u->portstr != NULL && u->portstr[0] != '\0') {
00460             char *end;
00461             u->port = strtol(u->portstr, &end, 0);
00462             if (!(end && *end == '\0')) {
00463                 rpmMessage(RPMMESS_ERROR, _("url port must be a number\n"));
00464                 myurl = _free(myurl);
00465                 u = urlFree(u, "urlSplit (error #3)");
00466                 return -1;
00467             }
00468         }
00469     }
00470     u->host = xstrdup(f);
00471 
00472     if (u->port < 0 && u->service != NULL) {
00473         struct servent *serv;
00474         /*@-unrecog -multithreaded -moduncon @*/
00475         serv = getservbyname(u->service, "tcp");
00476         /*@=unrecog =multithreaded =moduncon @*/
00477         if (serv != NULL)
00478             u->port = ntohs(serv->s_port);
00479         else if (u->urltype == URL_IS_FTP)
00480             u->port = IPPORT_FTP;
00481         else if (u->urltype == URL_IS_HTTP)
00482             u->port = IPPORT_HTTP;
00483     }
00484 
00485     myurl = _free(myurl);
00486     if (uret) {
00487         *uret = u;
00488 /*@-globs -mods @*/ /* FIX: rpmGlobalMacroContext not in <rpmlib.h> */
00489         urlFind(uret, 0);
00490 /*@=globs =mods @*/
00491     }
00492     return 0;
00493 }
00494 /*@=modfilesys@*/
00495 
00496 int urlGetFile(const char * url, const char * dest)
00497 {
00498     int rc;
00499     FD_t sfd = NULL;
00500     FD_t tfd = NULL;
00501     const char * sfuPath = NULL;
00502     int urlType = urlPath(url, &sfuPath);
00503 
00504     if (*sfuPath == '\0')
00505         return FTPERR_UNKNOWN;
00506         
00507     sfd = Fopen(url, "r.ufdio");
00508     if (sfd == NULL || Ferror(sfd)) {
00509         rpmMessage(RPMMESS_DEBUG, _("failed to open %s: %s\n"), url, Fstrerror(sfd));
00510         rc = FTPERR_UNKNOWN;
00511         goto exit;
00512     }
00513 
00514     if (dest == NULL) {
00515         if ((dest = strrchr(sfuPath, '/')) != NULL)
00516             dest++;
00517         else
00518             dest = sfuPath;
00519     }
00520 
00521     if (dest == NULL)
00522         return FTPERR_UNKNOWN;
00523 
00524     tfd = Fopen(dest, "w.ufdio");
00525 if (_url_debug)
00526 fprintf(stderr, "*** urlGetFile sfd %p %s tfd %p %s\n", sfd, url, (tfd ? tfd : NULL), dest);
00527     if (tfd == NULL || Ferror(tfd)) {
00528         /* XXX Fstrerror */
00529         rpmMessage(RPMMESS_DEBUG, _("failed to create %s: %s\n"), dest, Fstrerror(tfd));
00530         rc = FTPERR_UNKNOWN;
00531         goto exit;
00532     }
00533 
00534     switch (urlType) {
00535     case URL_IS_FTP:
00536     case URL_IS_HTTP:
00537     case URL_IS_PATH:
00538     case URL_IS_DASH:
00539     case URL_IS_UNKNOWN:
00540         if ((rc = ufdGetFile(sfd, tfd))) {
00541             (void) Unlink(dest);
00542             /* XXX FIXME: sfd possibly closed by copyData */
00543             /*@-usereleased@*/ (void) Fclose(sfd) /*@=usereleased@*/ ;
00544         }
00545         sfd = NULL;     /* XXX Fclose(sfd) done by ufdGetFile */
00546         break;
00547     default:
00548         rc = FTPERR_UNKNOWN;
00549         break;
00550     }
00551 
00552 exit:
00553     if (tfd)
00554         (void) Fclose(tfd);
00555     if (sfd)
00556         (void) Fclose(sfd);
00557 
00558     return rc;
00559 }
00560 /*@=type@*/

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