rpmio/url.c

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00001 
00005 #include "system.h"
00006 
00007 #include <netinet/in.h>
00008 
00009 #include <rpmmacro.h>
00010 #include <rpmmessages.h>
00011 #include <rpmio_internal.h>
00012 
00013 #include "debug.h"
00014 
00015 /*@access FD_t@*/               /* XXX compared with NULL */
00016 /*@access urlinfo@*/
00017 
00018 #ifndef IPPORT_FTP
00019 #define IPPORT_FTP      21
00020 #endif
00021 #ifndef IPPORT_HTTP
00022 #define IPPORT_HTTP     80
00023 #endif
00024 #ifndef IPPORT_HTTPS
00025 #define IPPORT_HTTPS    443
00026 #endif
00027 #ifndef IPPORT_PGPKEYSERVER
00028 #define IPPORT_PGPKEYSERVER     11371
00029 #endif
00030 
00033 /*@unchecked@*/
00034 int _url_iobuf_size = RPMURL_IOBUF_SIZE;
00035 
00038 /*@unchecked@*/
00039 int _url_debug = 0;
00040 
00041 #define URLDBG(_f, _m, _x)      if ((_url_debug | (_f)) & (_m)) fprintf _x
00042 
00043 #define URLDBGIO(_f, _x)        URLDBG((_f), RPMURL_DEBUG_IO, _x)
00044 #define URLDBGREFS(_f, _x)      URLDBG((_f), RPMURL_DEBUG_REFS, _x)
00045 
00048 /*@unchecked@*/
00049 /*@only@*/ /*@null@*/
00050 urlinfo *_url_cache = NULL;
00051 
00054 /*@unchecked@*/
00055 int _url_count = 0;
00056 
00062 /*@unused@*/ static inline /*@null@*/ void *
00063 _free(/*@only@*/ /*@null@*/ const void * p) /*@modifies p@*/
00064 {
00065     if (p != NULL)      free((void *)p);
00066     return NULL;
00067 }
00068 
00069 urlinfo XurlLink(urlinfo u, const char *msg, const char *file, unsigned line)
00070 {
00071     URLSANE(u);
00072     u->nrefs++;
00073 /*@-modfilesys@*/
00074 URLDBGREFS(0, (stderr, "--> url %p ++ %d %s at %s:%u\n", u, u->nrefs, msg, file, line));
00075 /*@=modfilesys@*/
00076     /*@-refcounttrans@*/ return u; /*@=refcounttrans@*/
00077 }
00078 
00079 urlinfo XurlNew(const char *msg, const char *file, unsigned line)
00080 {
00081     urlinfo u;
00082     if ((u = xmalloc(sizeof(*u))) == NULL)
00083         return NULL;
00084     memset(u, 0, sizeof(*u));
00085     u->proxyp = -1;
00086     u->port = -1;
00087     u->urltype = URL_IS_UNKNOWN;
00088     u->ctrl = NULL;
00089     u->data = NULL;
00090     u->bufAlloced = 0;
00091     u->buf = NULL;
00092     u->allow = RPMURL_SERVER_HASRANGE;
00093     u->httpVersion = 0;
00094     u->nrefs = 0;
00095     u->magic = URLMAGIC;
00096     return XurlLink(u, msg, file, line);
00097 }
00098 
00099 urlinfo XurlFree(urlinfo u, const char *msg, const char *file, unsigned line)
00100 {
00101     int xx;
00102 
00103     URLSANE(u);
00104 URLDBGREFS(0, (stderr, "--> url %p -- %d %s at %s:%u\n", u, u->nrefs, msg, file, line));
00105     if (--u->nrefs > 0)
00106         /*@-refcounttrans -retalias@*/ return u; /*@=refcounttrans =retalias@*/
00107     if (u->ctrl) {
00108 #ifndef NOTYET
00109         void * fp = fdGetFp(u->ctrl);
00110         /*@-branchstate@*/
00111         if (fp) {
00112             fdPush(u->ctrl, fpio, fp, -1);   /* Push fpio onto stack */
00113             (void) Fclose(u->ctrl);
00114         } else if (fdio->_fileno(u->ctrl) >= 0)
00115             xx = fdio->close(u->ctrl);
00116         /*@=branchstate@*/
00117 #else
00118         (void) Fclose(u->ctrl);
00119 #endif
00120 
00121         u->ctrl = fdio->_fdderef(u->ctrl, "persist ctrl (urlFree)", file, line);
00122         /*@-usereleased@*/
00123         if (u->ctrl)
00124             fprintf(stderr, _("warning: u %p ctrl %p nrefs != 0 (%s %s)\n"),
00125                         u, u->ctrl, (u->host ? u->host : ""),
00126                         (u->scheme ? u->scheme : ""));
00127         /*@=usereleased@*/
00128     }
00129     if (u->data) {
00130 #ifndef NOTYET
00131         void * fp = fdGetFp(u->data);
00132         if (fp) {
00133             fdPush(u->data, fpio, fp, -1);   /* Push fpio onto stack */
00134             (void) Fclose(u->data);
00135         } else if (fdio->_fileno(u->data) >= 0)
00136             xx = fdio->close(u->data);
00137 #else
00138         (void) Fclose(u->ctrl);
00139 #endif
00140 
00141         u->data = fdio->_fdderef(u->data, "persist data (urlFree)", file, line);
00142         /*@-usereleased@*/
00143         if (u->data)
00144             fprintf(stderr, _("warning: u %p data %p nrefs != 0 (%s %s)\n"),
00145                         u, u->data, (u->host ? u->host : ""),
00146                         (u->scheme ? u->scheme : ""));
00147         /*@=usereleased@*/
00148     }
00149     xx = davFree(u);
00150     u->buf = _free(u->buf);
00151     u->url = _free(u->url);
00152     u->scheme = _free((void *)u->scheme);
00153     u->user = _free((void *)u->user);
00154     u->password = _free((void *)u->password);
00155     u->host = _free((void *)u->host);
00156     u->portstr = _free((void *)u->portstr);
00157     u->proxyu = _free((void *)u->proxyu);
00158     u->proxyh = _free((void *)u->proxyh);
00159 
00160     /*@-refcounttrans@*/ u = _free(u); /*@-refcounttrans@*/
00161     return NULL;
00162 }
00163 
00164 /*@-boundswrite@*/
00165 void urlFreeCache(void)
00166 {
00167     if (_url_cache) {
00168         int i;
00169         for (i = 0; i < _url_count; i++) {
00170             if (_url_cache[i] == NULL) continue;
00171             _url_cache[i] = urlFree(_url_cache[i], "_url_cache");
00172             if (_url_cache[i])
00173                 fprintf(stderr,
00174                         _("warning: _url_cache[%d] %p nrefs(%d) != 1 (%s %s)\n"),
00175                         i, _url_cache[i], _url_cache[i]->nrefs,
00176                         (_url_cache[i]->host ? _url_cache[i]->host : ""),
00177                         (_url_cache[i]->scheme ? _url_cache[i]->scheme : ""));
00178         }
00179     }
00180     _url_cache = _free(_url_cache);
00181     _url_count = 0;
00182 }
00183 /*@=boundswrite@*/
00184 
00185 static int urlStrcmp(/*@null@*/ const char * str1, /*@null@*/ const char * str2)
00186         /*@*/
00187 {
00188     if (str1)
00189         if (str2)
00190             return strcmp(str1, str2);
00191     if (str1 != str2)
00192         return -1;
00193     return 0;
00194 }
00195 
00196 /*@-boundswrite@*/
00197 /*@-mods@*/
00198 static void urlFind(/*@null@*/ /*@in@*/ /*@out@*/ urlinfo * uret, int mustAsk)
00199         /*@globals rpmGlobalMacroContext, h_errno, fileSystem, internalState @*/
00200         /*@modifies *uret, rpmGlobalMacroContext, fileSystem, internalState @*/
00201 {
00202     urlinfo u;
00203     int ucx;
00204     int i = 0;
00205 
00206     if (uret == NULL)
00207         return;
00208 
00209     u = *uret;
00210     URLSANE(u);
00211 
00212     ucx = -1;
00213     for (i = 0; i < _url_count; i++) {
00214         urlinfo ou = NULL;
00215         if (_url_cache == NULL || (ou = _url_cache[i]) == NULL) {
00216             if (ucx < 0)
00217                 ucx = i;
00218             continue;
00219         }
00220 
00221         /* Check for cache-miss condition. A cache miss is
00222          *    a) both items are not NULL and don't compare.
00223          *    b) either of the items is not NULL.
00224          */
00225         if (urlStrcmp(u->scheme, ou->scheme))
00226             continue;
00227         if (urlStrcmp(u->host, ou->host))
00228             continue;
00229         if (urlStrcmp(u->user, ou->user))
00230             continue;
00231         if (urlStrcmp(u->portstr, ou->portstr))
00232             continue;
00233         break;  /* Found item in cache */
00234     }
00235 
00236     if (i == _url_count) {
00237         if (ucx < 0) {
00238             ucx = _url_count++;
00239             _url_cache = xrealloc(_url_cache, sizeof(*_url_cache) * _url_count);
00240         }
00241         if (_url_cache)         /* XXX always true */
00242             _url_cache[ucx] = urlLink(u, "_url_cache (miss)");
00243         u = urlFree(u, "urlSplit (urlFind miss)");
00244     } else {
00245         ucx = i;
00246         u = urlFree(u, "urlSplit (urlFind hit)");
00247     }
00248 
00249     /* This URL is now cached. */
00250 
00251     if (_url_cache)             /* XXX always true */
00252         u = urlLink(_url_cache[ucx], "_url_cache");
00253     *uret = u;
00254     /*@-usereleased@*/
00255     u = urlFree(u, "_url_cache (urlFind)");
00256     /*@=usereleased@*/
00257 
00258     /* Zap proxy host and port in case they have been reset */
00259     u->proxyp = -1;
00260     u->proxyh = _free(u->proxyh);
00261 
00262     /* Perform one-time FTP initialization */
00263     if (u->urltype == URL_IS_FTP) {
00264 
00265         if (mustAsk || (u->user != NULL && u->password == NULL)) {
00266             const char * host = (u->host ? u->host : "");
00267             const char * user = (u->user ? u->user : "");
00268             char * prompt;
00269             prompt = alloca(strlen(host) + strlen(user) + 256);
00270             sprintf(prompt, _("Password for %s@%s: "), user, host);
00271             u->password = _free(u->password);
00272 /*@-dependenttrans -moduncon @*/
00273             u->password = Getpass(prompt);
00274 /*@=dependenttrans =moduncon @*/
00275             if (u->password)
00276                 u->password = xstrdup(u->password);
00277         }
00278 
00279         if (u->proxyh == NULL) {
00280             const char *proxy = rpmExpand("%{_ftpproxy}", NULL);
00281             if (proxy && *proxy != '%') {
00282 /*@observer@*/
00283                 const char * host = (u->host ? u->host : "");
00284                 const char *uu = (u->user ? u->user : "anonymous");
00285                 char *nu = xmalloc(strlen(uu) + sizeof("@") + strlen(host));
00286                 (void) stpcpy( stpcpy( stpcpy(nu, uu), "@"), host);
00287                 u->proxyu = nu;
00288                 u->proxyh = xstrdup(proxy);
00289             }
00290             proxy = _free(proxy);
00291         }
00292 
00293         if (u->proxyp < 0) {
00294             const char *proxy = rpmExpand("%{_ftpport}", NULL);
00295             if (proxy && *proxy != '%') {
00296                 char *end = NULL;
00297                 int port = strtol(proxy, &end, 0);
00298                 if (!(end && *end == '\0')) {
00299                     fprintf(stderr, _("error: %sport must be a number\n"),
00300                         (u->scheme ? u->scheme : ""));
00301                     return;
00302                 }
00303                 u->proxyp = port;
00304             }
00305             proxy = _free(proxy);
00306         }
00307     }
00308 
00309     /* Perform one-time HTTP initialization */
00310     if (u->urltype == URL_IS_HTTP || u->urltype == URL_IS_HTTPS || u->urltype == URL_IS_HKP) {
00311 
00312         if (u->proxyh == NULL) {
00313             const char *proxy = rpmExpand("%{_httpproxy}", NULL);
00314             if (proxy && *proxy != '%')
00315                 u->proxyh = xstrdup(proxy);
00316             proxy = _free(proxy);
00317         }
00318 
00319         if (u->proxyp < 0) {
00320             const char *proxy = rpmExpand("%{_httpport}", NULL);
00321             if (proxy && *proxy != '%') {
00322                 char *end;
00323                 int port = strtol(proxy, &end, 0);
00324                 if (!(end && *end == '\0')) {
00325                     fprintf(stderr, _("error: %sport must be a number\n"),
00326                         (u->scheme ? u->scheme : ""));
00327                     return;
00328                 }
00329                 u->proxyp = port;
00330             }
00331             proxy = _free(proxy);
00332         }
00333 
00334     }
00335 
00336     return;
00337 }
00338 /*@=mods@*/
00339 /*@=boundswrite@*/
00340 
00343 /*@observer@*/ /*@unchecked@*/
00344 static struct urlstring {
00345 /*@observer@*/ /*@null@*/
00346     const char * leadin;
00347     urltype     ret;
00348 } urlstrings[] = {
00349     { "file://",        URL_IS_PATH },
00350     { "ftp://",         URL_IS_FTP },
00351     { "hkp://",         URL_IS_HKP },
00352     { "http://",        URL_IS_HTTP },
00353     { "https://",       URL_IS_HTTPS },
00354     { "-",              URL_IS_DASH },
00355     { NULL,             URL_IS_UNKNOWN }
00356 };
00357 
00358 urltype urlIsURL(const char * url)
00359 {
00360     struct urlstring *us;
00361 
00362 /*@-boundsread@*/
00363     if (url && *url) {
00364         for (us = urlstrings; us->leadin != NULL; us++) {
00365             if (strncmp(url, us->leadin, strlen(us->leadin)))
00366                 continue;
00367             return us->ret;
00368         }
00369     }
00370 /*@=boundsread@*/
00371 
00372     return URL_IS_UNKNOWN;
00373 }
00374 
00375 /*@-boundswrite@*/
00376 /* Return path portion of url (or pointer to NUL if url == NULL) */
00377 urltype urlPath(const char * url, const char ** pathp)
00378 {
00379     const char *path;
00380     int urltype;
00381 
00382     path = url;
00383     urltype = urlIsURL(url);
00384     /*@-branchstate@*/
00385     switch (urltype) {
00386     case URL_IS_FTP:
00387         url += sizeof("ftp://") - 1;
00388         path = strchr(url, '/');
00389         if (path == NULL) path = url + strlen(url);
00390         break;
00391     case URL_IS_PATH:
00392         url += sizeof("file://") - 1;
00393         path = strchr(url, '/');
00394         if (path == NULL) path = url + strlen(url);
00395         break;
00396     case URL_IS_HKP:
00397         url += sizeof("hkp://") - 1;
00398         path = strchr(url, '/');
00399         if (path == NULL) path = url + strlen(url);
00400         break;
00401     case URL_IS_HTTP:
00402         url += sizeof("http://") - 1;
00403         path = strchr(url, '/');
00404         if (path == NULL) path = url + strlen(url);
00405         break;
00406     case URL_IS_HTTPS:
00407         url += sizeof("https://") - 1;
00408         path = strchr(url, '/');
00409         if (path == NULL) path = url + strlen(url);
00410         break;
00411     case URL_IS_UNKNOWN:
00412         if (path == NULL) path = "";
00413         break;
00414     case URL_IS_DASH:
00415         path = "";
00416         break;
00417     }
00418     /*@=branchstate@*/
00419     if (pathp)
00420         /*@-observertrans@*/
00421         *pathp = path;
00422         /*@=observertrans@*/
00423     return urltype;
00424 }
00425 /*@=boundswrite@*/
00426 
00427 /*
00428  * Split URL into components. The URL can look like
00429  *      scheme://user:password@host:port/path
00430   * or as in RFC2732 for IPv6 address
00431   *    service://user:password@[ip:v6:ad:dr:es:s]:port/path
00432  */
00433 /*@-bounds@*/
00434 /*@-modfilesys@*/
00435 int urlSplit(const char * url, urlinfo *uret)
00436 {
00437     urlinfo u;
00438     char *myurl;
00439     char *s, *se, *f, *fe;
00440 
00441     if (uret == NULL)
00442         return -1;
00443     if ((u = urlNew("urlSplit")) == NULL)
00444         return -1;
00445 
00446     if ((se = s = myurl = xstrdup(url)) == NULL) {
00447         u = urlFree(u, "urlSplit (error #1)");
00448         return -1;
00449     }
00450 
00451     u->url = xstrdup(url);
00452     u->urltype = urlIsURL(url);
00453 
00454     while (1) {
00455         /* Point to end of next item */
00456         while (*se && *se != '/') se++;
00457         /* Item was scheme. Save scheme and go for the rest ...*/
00458         if (*se && (se != s) && se[-1] == ':' && se[0] == '/' && se[1] == '/') {
00459                 se[-1] = '\0';
00460             u->scheme = xstrdup(s);
00461             se += 2;    /* skip over "//" */
00462             s = se++;
00463             continue;
00464         }
00465         
00466         /* Item was everything-but-path. Continue parse on rest */
00467         *se = '\0';
00468         break;
00469     }
00470 
00471     /* Look for ...@host... */
00472     fe = f = s;
00473     while (*fe && *fe != '@') fe++;
00474     /*@-branchstate@*/
00475     if (*fe == '@') {
00476         s = fe + 1;
00477         *fe = '\0';
00478         /* Look for user:password@host... */
00479         while (fe > f && *fe != ':') fe--;
00480         if (*fe == ':') {
00481             *fe++ = '\0';
00482             u->password = xstrdup(fe);
00483         }
00484         u->user = xstrdup(f);
00485     }
00486     /*@=branchstate@*/
00487 
00488     /* Look for ...host:port or [v6addr]:port*/
00489     fe = f = s;
00490     if (strchr(fe, '[') && strchr(fe, ']'))
00491     {
00492             fe = strchr(f, ']');
00493             *f++ = '\0';
00494             *fe++ = '\0';
00495     }
00496     while (*fe && *fe != ':') fe++;
00497     if (*fe == ':') {
00498         *fe++ = '\0';
00499         u->portstr = xstrdup(fe);
00500         if (u->portstr != NULL && u->portstr[0] != '\0') {
00501             char *end;
00502             u->port = strtol(u->portstr, &end, 0);
00503             if (!(end && *end == '\0')) {
00504                 rpmMessage(RPMMESS_ERROR, _("url port must be a number\n"));
00505                 myurl = _free(myurl);
00506                 u = urlFree(u, "urlSplit (error #3)");
00507                 return -1;
00508             }
00509         }
00510     }
00511     u->host = xstrdup(f);
00512 
00513     if (u->port < 0 && u->scheme != NULL) {
00514         struct servent *serv;
00515 /*@-multithreaded -moduncon @*/
00516         /* HACK hkp:// might lookup "pgpkeyserver" */
00517         serv = getservbyname(u->scheme, "tcp");
00518 /*@=multithreaded =moduncon @*/
00519         if (serv != NULL)
00520             u->port = ntohs(serv->s_port);
00521         else if (u->urltype == URL_IS_FTP)
00522             u->port = IPPORT_FTP;
00523         else if (u->urltype == URL_IS_HKP)
00524             u->port = IPPORT_PGPKEYSERVER;
00525         else if (u->urltype == URL_IS_HTTP)
00526             u->port = IPPORT_HTTP;
00527         else if (u->urltype == URL_IS_HTTPS)
00528             u->port = IPPORT_HTTPS;
00529     }
00530 
00531     myurl = _free(myurl);
00532     if (uret) {
00533         *uret = u;
00534 /*@-globs -mods @*/ /* FIX: rpmGlobalMacroContext not in <rpmlib.h> */
00535         urlFind(uret, 0);
00536 /*@=globs =mods @*/
00537     }
00538     return 0;
00539 }
00540 /*@=modfilesys@*/
00541 /*@=bounds@*/
00542 
00543 int urlGetFile(const char * url, const char * dest)
00544 {
00545     int rc;
00546     FD_t sfd = NULL;
00547     FD_t tfd = NULL;
00548     const char * sfuPath = NULL;
00549     int urlType = urlPath(url, &sfuPath);
00550 
00551     if (*sfuPath == '\0')
00552         return FTPERR_UNKNOWN;
00553         
00554     sfd = Fopen(url, "r");
00555     if (sfd == NULL || Ferror(sfd)) {
00556         rpmMessage(RPMMESS_DEBUG, _("failed to open %s: %s\n"), url, Fstrerror(sfd));
00557         rc = FTPERR_UNKNOWN;
00558         goto exit;
00559     }
00560 
00561     if (dest == NULL) {
00562         if ((dest = strrchr(sfuPath, '/')) != NULL)
00563             dest++;
00564         else
00565             dest = sfuPath;
00566     }
00567 
00568     if (dest == NULL)
00569         return FTPERR_UNKNOWN;
00570 
00571     /* XXX this can fail if directory in path does not exist. */
00572     tfd = Fopen(dest, "w");
00573 if (_url_debug)
00574 fprintf(stderr, "*** urlGetFile sfd %p %s tfd %p %s\n", sfd, url, (tfd ? tfd : NULL), dest);
00575     if (tfd == NULL || Ferror(tfd)) {
00576         rpmMessage(RPMMESS_DEBUG, _("failed to create %s: %s\n"), dest, Fstrerror(tfd));
00577         rc = FTPERR_UNKNOWN;
00578         goto exit;
00579     }
00580 
00581     switch (urlType) {
00582     case URL_IS_HTTPS:
00583     case URL_IS_HTTP:
00584     case URL_IS_HKP:
00585     case URL_IS_FTP:
00586     case URL_IS_PATH:
00587     case URL_IS_DASH:
00588     case URL_IS_UNKNOWN:
00589         if ((rc = ufdGetFile(sfd, tfd))) {
00590             (void) Unlink(dest);
00591             /* XXX FIXME: sfd possibly closed by copyData */
00592             /*@-usereleased@*/ (void) Fclose(sfd) /*@=usereleased@*/ ;
00593         }
00594         sfd = NULL;     /* XXX Fclose(sfd) done by ufdGetFile */
00595         break;
00596     default:
00597         rc = FTPERR_UNKNOWN;
00598         break;
00599     }
00600 
00601 exit:
00602     if (tfd)
00603         (void) Fclose(tfd);
00604     if (sfd)
00605         (void) Fclose(sfd);
00606 
00607     return rc;
00608 }

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