ftp.c
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上传日期:2007-01-04
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文件大小:67k
- /*
- * $Id: ftp.c,v 1.280.2.2 1999/02/12 22:13:57 wessels Exp $
- *
- * DEBUG: section 9 File Transfer Protocol (FTP)
- * AUTHOR: Harvest Derived
- *
- * SQUID Internet Object Cache http://squid.nlanr.net/Squid/
- * ----------------------------------------------------------
- *
- * Squid is the result of efforts by numerous individuals from the
- * Internet community. Development is led by Duane Wessels of the
- * National Laboratory for Applied Network Research and funded by the
- * National Science Foundation. Squid is Copyrighted (C) 1998 by
- * Duane Wessels and the University of California San Diego. Please
- * see the COPYRIGHT file for full details. Squid incorporates
- * software developed and/or copyrighted by other sources. Please see
- * the CREDITS file for full details.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
- *
- */
- #include "squid.h"
- static const char *const crlf = "rn";
- static char cbuf[1024];
- typedef enum {
- BEGIN,
- SENT_USER,
- SENT_PASS,
- SENT_TYPE,
- SENT_MDTM,
- SENT_SIZE,
- SENT_PORT,
- SENT_PASV,
- SENT_CWD,
- SENT_LIST,
- SENT_NLST,
- SENT_REST,
- SENT_RETR,
- SENT_STOR,
- SENT_QUIT,
- READING_DATA,
- WRITING_DATA,
- SENT_MKDIR
- } ftp_state_t;
- struct _ftp_flags {
- int isdir:1;
- int pasv_supported:1;
- int skip_whitespace:1;
- int rest_supported:1;
- int pasv_only:1;
- int authenticated:1;
- int http_header_sent:1;
- int tried_nlst:1;
- int use_base:1;
- int root_dir:1;
- int no_dotdot:1;
- int html_header_sent:1;
- int binary:1;
- int try_slash_hack:1;
- int put:1;
- int put_mkdir:1;
- int listformat_unknown:1;
- int datachannel_hack:1;
- };
- typedef struct _Ftpdata {
- StoreEntry *entry;
- request_t *request;
- char user[MAX_URL];
- char password[MAX_URL];
- char *reply_hdr;
- int reply_hdr_state;
- char *title_url;
- int conn_att;
- int login_att;
- ftp_state_t state;
- time_t mdtm;
- int size;
- wordlist *pathcomps;
- char *filepath;
- int restart_offset;
- int restarted_offset;
- int rest_att;
- char *proxy_host;
- size_t list_width;
- wordlist *cwd_message;
- char *old_request;
- char *old_reply;
- char *old_filepath;
- char typecode;
- struct {
- int fd;
- char *buf;
- size_t size;
- off_t offset;
- FREE *freefunc;
- wordlist *message;
- char *last_command;
- char *last_reply;
- int replycode;
- } ctrl;
- struct {
- int fd;
- char *buf;
- size_t size;
- off_t offset;
- FREE *freefunc;
- char *host;
- u_short port;
- } data;
- struct _ftp_flags flags;
- FwdState *fwd;
- } FtpStateData;
- typedef struct {
- char type;
- int size;
- char *date;
- char *name;
- char *showname;
- char *link;
- } ftpListParts;
- typedef void (FTPSM) (FtpStateData *);
- #define FTP_LOGIN_ESCAPED 1
- #define FTP_LOGIN_NOT_ESCAPED 0
- /* Local functions */
- static CNCB ftpPasvCallback;
- static PF ftpDataRead;
- static PF ftpStateFree;
- static PF ftpTimeout;
- static PF ftpReadControlReply;
- static CWCB ftpWriteCommandCallback;
- static void ftpLoginParser(const char *, FtpStateData *, int escaped);
- static wordlist *ftpParseControlReply(char *, size_t, int *, int *);
- static int ftpRestartable(FtpStateData * ftpState);
- static void ftpAppendSuccessHeader(FtpStateData * ftpState);
- static void ftpAuthRequired(HttpReply * reply, request_t * request, const char *realm);
- static void ftpHackShortcut(FtpStateData * ftpState, FTPSM * nextState);
- static void ftpPutStart(FtpStateData *);
- static CWCB ftpPutTransferDone;
- static void ftpUnhack(FtpStateData * ftpState);
- static void ftpScheduleReadControlReply(FtpStateData *, int);
- static void ftpHandleControlReply(FtpStateData *);
- static char *ftpHtmlifyListEntry(char *line, FtpStateData * ftpState);
- /* State machine functions
- * send == state transition
- * read == wait for response, and select next state transition
- * other == Transition logic
- */
- static FTPSM ftpReadWelcome;
- static FTPSM ftpSendUser;
- static FTPSM ftpReadUser;
- static FTPSM ftpSendPass;
- static FTPSM ftpReadPass;
- static FTPSM ftpSendType;
- static FTPSM ftpReadType;
- static FTPSM ftpSendMdtm;
- static FTPSM ftpReadMdtm;
- static FTPSM ftpSendSize;
- static FTPSM ftpReadSize;
- static FTPSM ftpSendPort;
- static FTPSM ftpReadPort;
- static FTPSM ftpSendPasv;
- static FTPSM ftpReadPasv;
- static FTPSM ftpTraverseDirectory;
- static FTPSM ftpListDir;
- static FTPSM ftpGetFile;
- static FTPSM ftpSendCwd;
- static FTPSM ftpReadCwd;
- static FTPSM ftpSendList;
- static FTPSM ftpSendNlst;
- static FTPSM ftpReadList;
- static FTPSM ftpSendRest;
- static FTPSM ftpReadRest;
- static FTPSM ftpSendRetr;
- static FTPSM ftpReadRetr;
- static FTPSM ftpReadTransferDone;
- static FTPSM ftpSendQuit;
- static FTPSM ftpReadQuit;
- static FTPSM ftpFail;
- static FTPSM ftpDataTransferDone;
- static FTPSM ftpRestOrList;
- static FTPSM ftpSendStor;
- static FTPSM ftpReadStor;
- static FTPSM ftpSendReply;
- static FTPSM ftpTryMkdir;
- static FTPSM ftpReadMkdir;
- /************************************************
- ** State Machine Description (excluding hacks) **
- *************************************************
- From To
- ---------------------------------------
- Welcome User
- User Pass
- Pass Type
- Type TraverseDirectory / GetFile
- TraverseDirectory Cwd / GetFile / ListDir
- Cwd TraverseDirectory
- GetFile Mdtm
- Mdtm Size
- Size Pasv
- ListDir Pasv
- Pasv RestOrList
- RestOrList Rest / Retr / Nlst / List
- Rest Retr
- Retr / Nlst / List (ftpDataRead on datachannel)
- (ftpDataRead) ReadTransferDone
- ReadTransferDone DataTransferDone
- DataTransferDone Quit
- Quit -
- ************************************************/
- FTPSM *FTP_SM_FUNCS[] =
- {
- ftpReadWelcome,
- ftpReadUser,
- ftpReadPass,
- ftpReadType,
- ftpReadMdtm,
- ftpReadSize,
- ftpReadPort,
- ftpReadPasv,
- ftpReadCwd,
- ftpReadList, /* SENT_LIST */
- ftpReadList, /* SENT_NLST */
- ftpReadRest,
- ftpReadRetr,
- ftpReadStor,
- ftpReadQuit,
- ftpReadTransferDone,
- ftpSendReply,
- ftpReadMkdir
- };
- static void
- ftpStateFree(int fdnotused, void *data)
- {
- FtpStateData *ftpState = data;
- if (ftpState == NULL)
- return;
- debug(9, 3) ("ftpStateFree: %sn", storeUrl(ftpState->entry));
- storeUnregisterAbort(ftpState->entry);
- storeUnlockObject(ftpState->entry);
- if (ftpState->reply_hdr) {
- memFree(ftpState->reply_hdr, MEM_8K_BUF);
- ftpState->reply_hdr = NULL;
- }
- requestUnlink(ftpState->request);
- if (ftpState->ctrl.buf)
- ftpState->ctrl.freefunc(ftpState->ctrl.buf);
- if (ftpState->data.buf)
- ftpState->data.freefunc(ftpState->data.buf);
- if (ftpState->pathcomps)
- wordlistDestroy(&ftpState->pathcomps);
- if (ftpState->ctrl.message)
- wordlistDestroy(&ftpState->ctrl.message);
- if (ftpState->cwd_message)
- wordlistDestroy(&ftpState->cwd_message);
- safe_free(ftpState->ctrl.last_reply);
- safe_free(ftpState->ctrl.last_command);
- safe_free(ftpState->old_request);
- safe_free(ftpState->old_reply);
- safe_free(ftpState->old_filepath);
- safe_free(ftpState->title_url);
- safe_free(ftpState->filepath);
- safe_free(ftpState->data.host);
- if (ftpState->data.fd > -1) {
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- }
- cbdataFree(ftpState);
- }
- static void
- ftpLoginParser(const char *login, FtpStateData * ftpState, int escaped)
- {
- char *s = NULL;
- xstrncpy(ftpState->user, login, MAX_URL);
- if ((s = strchr(ftpState->user, ':'))) {
- *s = 0;
- xstrncpy(ftpState->password, s + 1, MAX_URL);
- if (escaped)
- rfc1738_unescape(ftpState->password);
- } else {
- xstrncpy(ftpState->password, null_string, MAX_URL);
- }
- if (escaped)
- rfc1738_unescape(ftpState->user);
- if (ftpState->user[0] || ftpState->password[0])
- return;
- xstrncpy(ftpState->user, "anonymous", MAX_URL);
- xstrncpy(ftpState->password, Config.Ftp.anon_user, MAX_URL);
- }
- static void
- ftpTimeout(int fd, void *data)
- {
- FtpStateData *ftpState = data;
- StoreEntry *entry = ftpState->entry;
- debug(9, 4) ("ftpTimeout: FD %d: '%s'n", fd, storeUrl(entry));
- if (entry->store_status == STORE_PENDING) {
- if (entry->mem_obj->inmem_hi == 0) {
- fwdFail(ftpState->fwd,
- errorCon(ERR_READ_TIMEOUT, HTTP_GATEWAY_TIMEOUT));
- }
- }
- if (ftpState->data.fd > -1) {
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- }
- comm_close(ftpState->ctrl.fd);
- /* don't modify ftpState here, it has been freed */
- }
- static void
- ftpListingStart(FtpStateData * ftpState)
- {
- StoreEntry *e = ftpState->entry;
- wordlist *w;
- char *dirup;
- int i, j, k;
- storeBuffer(e);
- storeAppendPrintf(e, "<!-- HTML listing generated by Squid %s -->n",
- version_string);
- storeAppendPrintf(e, "<!-- %s -->n", mkrfc1123(squid_curtime));
- storeAppendPrintf(e, "<HTML><HEAD><TITLE>n");
- storeAppendPrintf(e, "FTP Directory: %sn",
- ftpState->title_url);
- storeAppendPrintf(e, "</TITLE>n");
- if (ftpState->flags.use_base)
- storeAppendPrintf(e, "<BASE HREF="%s">n",
- ftpState->title_url);
- storeAppendPrintf(e, "</HEAD><BODY>n");
- if (ftpState->cwd_message) {
- storeAppendPrintf(e, "<PRE>n");
- for (w = ftpState->cwd_message; w; w = w->next)
- storeAppendPrintf(e, "%sn", w->key);
- storeAppendPrintf(e, "</PRE>n");
- storeAppendPrintf(e, "<HR>n");
- wordlistDestroy(&ftpState->cwd_message);
- }
- storeAppendPrintf(e, "<H2>n");
- storeAppendPrintf(e, "FTP Directory: ");
- /* "ftp://" == 6 characters */
- assert(strlen(ftpState->title_url) >= 6);
- for (i = 6, j = 0; ftpState->title_url[i]; j = i) {
- storeAppendPrintf(e, "<A HREF="");
- i += strcspn(&ftpState->title_url[i], "/");
- if (ftpState->title_url[i] == '/')
- i++;
- for (k = 0; k < i; k++)
- storeAppendPrintf(e, "%c", ftpState->title_url[k]);
- storeAppendPrintf(e, "">");
- for (k = j; k < i - 1; k++)
- storeAppendPrintf(e, "%c", ftpState->title_url[k]);
- if (ftpState->title_url[k] != '/')
- storeAppendPrintf(e, "%c", ftpState->title_url[k++]);
- storeAppendPrintf(e, "</A>");
- if (k < i)
- storeAppendPrintf(e, "%c", ftpState->title_url[k++]);
- if (i == j) {
- /* Error guard, or "assert" */
- storeAppendPrintf(e, "ERROR: Failed to parse URL: %sn",
- ftpState->title_url);
- debug(9, 0) ("Failed to parse URL: %sn", ftpState->title_url);
- break;
- }
- }
- storeAppendPrintf(e, "</H2>n");
- storeAppendPrintf(e, "<PRE>n");
- dirup = ftpHtmlifyListEntry("<internal-dirup>", ftpState);
- storeAppend(e, dirup, strlen(dirup));
- storeBufferFlush(e);
- ftpState->flags.html_header_sent = 1;
- }
- static void
- ftpListingFinish(FtpStateData * ftpState)
- {
- StoreEntry *e = ftpState->entry;
- storeBuffer(e);
- storeAppendPrintf(e, "</PRE>n");
- if (ftpState->flags.listformat_unknown && !ftpState->flags.tried_nlst) {
- storeAppendPrintf(e, "<A HREF="./;type=d">[As plain directory]</A>n");
- } else if (ftpState->typecode == 'D') {
- storeAppendPrintf(e, "<A HREF="./">[As extended directory]</A>n");
- }
- storeAppendPrintf(e, "<HR>n");
- storeAppendPrintf(e, "<ADDRESS>n");
- storeAppendPrintf(e, "Generated %s by %s (<a href="http://squid.nlanr.net/Squid/">%s</a>)n",
- mkrfc1123(squid_curtime),
- getMyHostname(),
- full_appname_string,
- version_string);
- storeAppendPrintf(e, "</ADDRESS></BODY></HTML>n");
- storeBufferFlush(e);
- }
- static const char *Month[] =
- {
- "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
- };
- static int
- is_month(const char *buf)
- {
- int i;
- for (i = 0; i < 12; i++)
- if (!strcasecmp(buf, Month[i]))
- return 1;
- return 0;
- }
- static void
- ftpListPartsFree(ftpListParts ** parts)
- {
- safe_free((*parts)->date);
- safe_free((*parts)->name);
- safe_free((*parts)->showname);
- safe_free((*parts)->link);
- safe_free(*parts);
- }
- #define MAX_TOKENS 64
- #define SCAN_FTP1 "%[0123456789]"
- #define SCAN_FTP2 "%[0123456789:]"
- #define SCAN_FTP3 "%[0123456789]-%[0123456789]-%[0123456789]"
- #define SCAN_FTP4 "%[0123456789]:%[0123456789]%[AaPp]%[Mm]"
- static ftpListParts *
- ftpListParseParts(const char *buf, struct _ftp_flags flags)
- {
- ftpListParts *p = NULL;
- char *t = NULL;
- const char *ct = NULL;
- char *tokens[MAX_TOKENS];
- int i;
- int n_tokens;
- static char sbuf[128];
- char *xbuf = NULL;
- if (buf == NULL)
- return NULL;
- if (*buf == ' ')
- return NULL;
- p = xcalloc(1, sizeof(ftpListParts));
- n_tokens = 0;
- for (i = 0; i < MAX_TOKENS; i++)
- tokens[i] = (char *) NULL;
- xbuf = xstrdup(buf);
- if (flags.tried_nlst) {
- /* Machine readable format, one name per line */
- p->name = xbuf;
- p->type = ' ';
- return p;
- }
- for (t = strtok(xbuf, w_space); t && n_tokens < MAX_TOKENS; t = strtok(NULL, w_space))
- tokens[n_tokens++] = xstrdup(t);
- xfree(xbuf);
- /* locate the Month field */
- for (i = 3; i < n_tokens - 3; i++) {
- if (!is_month(tokens[i])) /* Month */
- continue;
- if (!sscanf(tokens[i - 1], SCAN_FTP1, sbuf)) /* Size */
- continue;
- if (!sscanf(tokens[i + 1], SCAN_FTP1, sbuf)) /* Day */
- continue;
- if (!sscanf(tokens[i + 2], SCAN_FTP2, sbuf)) /* Yr | hh:mm */
- continue;
- p->type = *tokens[0];
- p->size = atoi(tokens[i - 1]);
- snprintf(sbuf, 128, "%s %2s %5s",
- tokens[i], tokens[i + 1], tokens[i + 2]);
- if (!strstr(buf, sbuf))
- snprintf(sbuf, 128, "%s %2s %-5s",
- tokens[i], tokens[i + 1], tokens[i + 2]);
- if ((t = strstr(buf, sbuf))) {
- p->date = xstrdup(sbuf);
- if (flags.skip_whitespace) {
- t += strlen(sbuf);
- while (strchr(w_space, *t))
- t++;
- } else {
- /* XXX assumes a single space between date and filename
- * suggested by: Nathan.Bailey@cc.monash.edu.au and
- * Mike Battersby <mike@starbug.bofh.asn.au> */
- t += strlen(sbuf) + 1;
- }
- p->name = xstrdup(t);
- if ((t = strstr(p->name, " -> "))) {
- *t = ' ';
- p->link = xstrdup(t + 4);
- }
- }
- break;
- }
- /* try it as a DOS listing */
- if (n_tokens > 3 && p->name == NULL &&
- sscanf(tokens[0], SCAN_FTP3, sbuf, sbuf, sbuf) == 3 &&
- /* 04-05-70 */
- sscanf(tokens[1], SCAN_FTP4, sbuf, sbuf, sbuf, sbuf) == 4) {
- /* 09:33PM */
- if (!strcasecmp(tokens[2], "<dir>")) {
- p->type = 'd';
- } else {
- p->type = '-';
- p->size = atoi(tokens[2]);
- }
- snprintf(sbuf, 128, "%s %s", tokens[0], tokens[1]);
- p->date = xstrdup(sbuf);
- if (p->type == 'd') {
- /* Directory.. name begins with first printable after <dir> */
- ct = strstr(buf, tokens[2]);
- ct += strlen(tokens[2]);
- while (xisspace(*ct))
- ct++;
- if (!*ct)
- ct = NULL;
- } else {
- /* A file. Name begins after size, with a space in between */
- snprintf(sbuf, 128, " %s %s", tokens[2], tokens[3]);
- ct = strstr(buf, sbuf);
- if (ct) {
- ct += strlen(tokens[2]) + 2;
- }
- }
- p->name = xstrdup(ct ? ct : tokens[3]);
- }
- /* Try EPLF format; carson@lehman.com */
- if (p->name == NULL && buf[0] == '+') {
- ct = buf + 1;
- p->type = 0;
- while (ct && *ct) {
- switch (*ct) {
- case 't':
- sscanf(ct + 1, "%[^,]", sbuf);
- p->name = xstrdup(sbuf);
- break;
- case 's':
- sscanf(ct + 1, "%d", &(p->size));
- break;
- case 'm':
- sscanf(ct + 1, "%d", &i);
- p->date = xstrdup(ctime((time_t *) & i));
- *(strstr(p->date, "n")) = ' ';
- break;
- case '/':
- p->type = 'd';
- break;
- case 'r':
- p->type = '-';
- break;
- case 'i':
- break;
- default:
- break;
- }
- ct = strstr(ct, ",");
- if (ct) {
- ct++;
- }
- }
- if (p->type == 0) {
- p->type = '-';
- }
- }
- for (i = 0; i < n_tokens; i++)
- xfree(tokens[i]);
- if (p->name == NULL)
- ftpListPartsFree(&p);
- return p;
- }
- static const char *
- dots_fill(size_t len)
- {
- static char buf[256];
- int i = 0;
- if (len > Config.Ftp.list_width) {
- memset(buf, ' ', 256);
- buf[0] = 'n';
- buf[Config.Ftp.list_width + 4] = ' ';
- return buf;
- }
- for (i = (int) len; i < Config.Ftp.list_width; i++)
- buf[i - len] = (i % 2) ? '.' : ' ';
- buf[i - len] = ' ';
- return buf;
- }
- static char *
- ftpHtmlifyListEntry(char *line, FtpStateData * ftpState)
- {
- LOCAL_ARRAY(char, icon, 2048);
- LOCAL_ARRAY(char, href, 2048 + 40);
- LOCAL_ARRAY(char, text, 2048);
- LOCAL_ARRAY(char, size, 2048);
- LOCAL_ARRAY(char, chdir, 2048 + 40);
- LOCAL_ARRAY(char, view, 2048 + 40);
- LOCAL_ARRAY(char, download, 2048 + 40);
- LOCAL_ARRAY(char, link, 2048 + 40);
- LOCAL_ARRAY(char, html, 8192);
- size_t width = Config.Ftp.list_width;
- ftpListParts *parts;
- *icon = *href = *text = *size = *chdir = *view = *download = *link = *html = ' ';
- if ((int) strlen(line) > 1024) {
- snprintf(html, 8192, "%sn", line);
- return html;
- }
- /* Handle builtin <dirup> */
- if (!strcmp(line, "<internal-dirup>")) {
- /* <A HREF="{href}">{icon}</A> <A HREF="{href}">{text}</A> {link} */
- snprintf(icon, 2048, "<IMG BORDER=0 SRC="%s" ALT="%-6s">",
- mimeGetIconURL("internal-dirup"),
- "[DIRUP]");
- if (!ftpState->flags.no_dotdot && !ftpState->flags.root_dir) {
- /* Normal directory */
- strcpy(href, "../");
- strcpy(text, "Parent Directory");
- } else if (!ftpState->flags.no_dotdot && ftpState->flags.root_dir) {
- /* "Top level" directory */
- strcpy(href, "%2e%2e/");
- strcpy(text, "Parent Directory");
- snprintf(link, 2048, "(<A HREF="%s">%s</A>)",
- "%2f/",
- "Root Directory");
- } else if (ftpState->flags.no_dotdot && !ftpState->flags.root_dir) {
- /* Normal directory where last component is / or .. */
- strcpy(href, "%2e%2e/");
- strcpy(text, "Parent Directory");
- snprintf(link, 2048, "(<A HREF="%s">%s</A>)",
- "../",
- "Back");
- } else { /* NO_DOTDOT && ROOT_DIR */
- /* "UNIX Root" directory */
- strcpy(href, "../");
- strcpy(text, "Home Directory");
- }
- snprintf(html, 8192, "<A HREF="%s">%s</A> <A HREF="%s">%s</A> %sn",
- href, icon, href, text, link);
- return html;
- }
- if ((parts = ftpListParseParts(line, ftpState->flags)) == NULL) {
- char *p;
- snprintf(html, 8192, "%sn", line);
- for (p = line; *p && xisspace(*p); p++);
- if (*p && !xisspace(*p))
- ftpState->flags.listformat_unknown = 1;
- return html;
- }
- if (!strcmp(parts->name, ".") || !strcmp(parts->name, "..")) {
- *html = ' ';
- ftpListPartsFree(&parts);
- return html;
- }
- parts->size += 1023;
- parts->size >>= 10;
- parts->showname = xstrdup(parts->name);
- if (!Config.Ftp.list_wrap) {
- if (strlen(parts->showname) > width - 1) {
- *(parts->showname + width - 1) = '>';
- *(parts->showname + width - 0) = ' ';
- }
- }
- /* {icon} {text} . . . {date}{size}{chdir}{view}{download}{link}n */
- xstrncpy(href, rfc1738_escape(parts->name), 2048);
- xstrncpy(text, parts->showname, 2048);
- switch (parts->type) {
- case 'd':
- snprintf(icon, 2048, "<IMG BORDER=0 SRC="%s" ALT="%-6s">",
- mimeGetIconURL("internal-dir"),
- "[DIR]");
- strncat(href, "/", 2048);
- break;
- case 'l':
- snprintf(icon, 2048, "<IMG BORDER=0 SRC="%s" ALT="%-6s">",
- mimeGetIconURL("internal-link"),
- "[LINK]");
- /* sometimes there is an 'l' flag, but no "->" link */
- if (parts->link)
- snprintf(link, 2048, " -> <A HREF="%s">%s</A>",
- rfc1738_escape(parts->link),
- parts->link);
- break;
- case ' ':
- snprintf(icon, 2048, "<IMG BORDER=0 SRC="%s" ALT="%-6s">",
- mimeGetIconURL(parts->name),
- "[UNKNOWN]");
- snprintf(chdir, 2048, " <A HREF="%s/;type=d"><IMG BORDER=0 SRC="%s" "
- "ALT="[DIR]"></A>",
- rfc1738_escape(parts->name),
- mimeGetIconURL("internal-dir"));
- break;
- case '-':
- default:
- snprintf(icon, 2048, "<IMG BORDER=0 SRC="%s" ALT="%-6s">",
- mimeGetIconURL(parts->name),
- "[FILE]");
- snprintf(size, 2048, " %6dk", parts->size);
- break;
- }
- if (parts->type != 'd') {
- if (mimeGetViewOption(parts->name)) {
- snprintf(view, 2048, " <A HREF="%s;type=a"><IMG BORDER=0 SRC="%s" "
- "ALT="[VIEW]"></A>",
- href, mimeGetIconURL("internal-view"));
- }
- if (mimeGetDownloadOption(parts->name)) {
- snprintf(download, 2048, " <A HREF="%s;type=i"><IMG BORDER=0 SRC="%s" "
- "ALT="[DOWNLOAD]"></A>",
- href, mimeGetIconURL("internal-download"));
- }
- }
- /* <A HREF="{href}">{icon}</A> <A HREF="{href}">{text}</A> . . . {date}{size}{chdir}{view}{download}{link}n */
- if (parts->type != ' ') {
- snprintf(html, 8192, "<A HREF="%s">%s</A> <A HREF="%s">%s</A>%s "
- "%s%8s%s%s%s%sn",
- href, icon, href, text, dots_fill(strlen(text)),
- parts->date, size, chdir, view, download, link);
- } else {
- /* Plain listing. {icon} {text} ... {chdir}{view}{download} */
- snprintf(html, 8192, "<A HREF="%s">%s</A> <A HREF="%s">%s</A>%s "
- "%s%s%s%sn",
- href, icon, href, text, dots_fill(strlen(text)),
- chdir, view, download, link);
- }
- ftpListPartsFree(&parts);
- return html;
- }
- static void
- ftpParseListing(FtpStateData * ftpState)
- {
- char *buf = ftpState->data.buf;
- char *sbuf; /* NULL-terminated copy of buf */
- char *end;
- char *line;
- char *s;
- char *t;
- size_t linelen;
- size_t usable;
- StoreEntry *e = ftpState->entry;
- int len = ftpState->data.offset;
- /*
- * We need a NULL-terminated buffer for scanning, ick
- */
- sbuf = xmalloc(len + 1);
- xstrncpy(sbuf, buf, len + 1);
- end = sbuf + len - 1;
- while (*end != 'r' && *end != 'n' && end > sbuf)
- end--;
- usable = end - sbuf;
- debug(9, 3) ("ftpParseListing: usable = %dn", usable);
- if (usable == 0) {
- debug(9, 3) ("ftpParseListing: didn't find end for %sn", storeUrl(e));
- xfree(sbuf);
- return;
- }
- debug(9, 3) ("ftpParseListing: %d bytes to play withn", len);
- line = memAllocate(MEM_4K_BUF);
- end++;
- storeBuffer(e);
- s = sbuf;
- s += strspn(s, crlf);
- for (; s < end; s += strcspn(s, crlf), s += strspn(s, crlf)) {
- debug(9, 3) ("ftpParseListing: s = {%s}n", s);
- linelen = strcspn(s, crlf) + 1;
- if (linelen < 2)
- break;
- if (linelen > 4096)
- linelen = 4096;
- xstrncpy(line, s, linelen);
- debug(9, 7) ("ftpParseListing: {%s}n", line);
- if (!strncmp(line, "total", 5))
- continue;
- t = ftpHtmlifyListEntry(line, ftpState);
- assert(t != NULL);
- storeAppend(e, t, strlen(t));
- }
- storeBufferFlush(e);
- assert(usable <= len);
- if (usable < len) {
- /* must copy partial line to beginning of buf */
- linelen = len - usable;
- if (linelen > 4096)
- linelen = 4096;
- xstrncpy(line, end, linelen);
- xstrncpy(ftpState->data.buf, line, ftpState->data.size);
- ftpState->data.offset = strlen(ftpState->data.buf);
- }
- memFree(line, MEM_4K_BUF);
- xfree(sbuf);
- }
- static void
- ftpReadComplete(FtpStateData * ftpState)
- {
- debug(9, 3) ("ftpReadCompleten");
- /* Connection closed; retrieval done. */
- if (ftpState->flags.html_header_sent)
- ftpListingFinish(ftpState);
- if (!ftpState->flags.put) {
- storeTimestampsSet(ftpState->entry);
- fwdComplete(ftpState->fwd);
- }
- /* expect the "transfer complete" message on the control socket */
- ftpScheduleReadControlReply(ftpState, 1);
- }
- static void
- ftpDataRead(int fd, void *data)
- {
- FtpStateData *ftpState = data;
- int len;
- int j;
- int bin;
- StoreEntry *entry = ftpState->entry;
- MemObject *mem = entry->mem_obj;
- size_t read_sz;
- #if DELAY_POOLS
- delay_id delay_id = delayMostBytesAllowed(mem);
- #endif
- assert(fd == ftpState->data.fd);
- if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) {
- comm_close(ftpState->ctrl.fd);
- return;
- }
- errno = 0;
- read_sz = ftpState->data.size - ftpState->data.offset;
- #if DELAY_POOLS
- read_sz = delayBytesWanted(delay_id, 1, read_sz);
- #endif
- memset(ftpState->data.buf + ftpState->data.offset, ' ', read_sz);
- Counter.syscalls.sock.reads++;
- len = read(fd, ftpState->data.buf + ftpState->data.offset, read_sz);
- if (len > 0) {
- fd_bytes(fd, len, FD_READ);
- #if DELAY_POOLS
- delayBytesIn(delay_id, len);
- #endif
- kb_incr(&Counter.server.all.kbytes_in, len);
- kb_incr(&Counter.server.ftp.kbytes_in, len);
- ftpState->data.offset += len;
- }
- debug(9, 5) ("ftpDataRead: FD %d, Read %d bytesn", fd, len);
- if (len > 0) {
- IOStats.Ftp.reads++;
- for (j = len - 1, bin = 0; j; bin++)
- j >>= 1;
- IOStats.Ftp.read_hist[bin]++;
- }
- if (ftpState->flags.isdir && !ftpState->flags.html_header_sent && len >= 0) {
- ftpListingStart(ftpState);
- }
- if (len < 0) {
- debug(50, 1) ("ftpDataRead: read error: %sn", xstrerror());
- if (ignoreErrno(errno)) {
- commSetSelect(fd,
- COMM_SELECT_READ,
- ftpDataRead,
- data,
- Config.Timeout.read);
- } else {
- assert(mem->inmem_hi > 0);
- ftpDataTransferDone(ftpState);
- }
- } else if (len == 0) {
- ftpReadComplete(ftpState);
- } else {
- if (ftpState->flags.isdir) {
- ftpParseListing(ftpState);
- } else {
- storeAppend(entry, ftpState->data.buf, len);
- ftpState->data.offset = 0;
- }
- if (ftpState->size > 0 && mem->inmem_hi >= ftpState->size + mem->reply->hdr_sz)
- ftpReadComplete(ftpState);
- else
- commSetSelect(fd,
- COMM_SELECT_READ,
- ftpDataRead,
- data,
- Config.Timeout.read);
- }
- }
- /*
- * ftpCheckAuth
- *
- * Return 1 if we have everything needed to complete this request.
- * Return 0 if something is missing.
- */
- static int
- ftpCheckAuth(FtpStateData * ftpState, const HttpHeader * req_hdr)
- {
- char *orig_user;
- const char *auth;
- ftpLoginParser(ftpState->request->login, ftpState, FTP_LOGIN_ESCAPED);
- if (ftpState->user[0] && ftpState->password[0])
- return 1; /* name and passwd both in URL */
- if (!ftpState->user[0] && !ftpState->password[0])
- return 1; /* no name or passwd */
- if (ftpState->password[0])
- return 1; /* passwd with no name? */
- /* URL has name, but no passwd */
- if (!(auth = httpHeaderGetAuth(req_hdr, HDR_AUTHORIZATION, "Basic")))
- return 0; /* need auth header */
- ftpState->flags.authenticated = 1;
- orig_user = xstrdup(ftpState->user);
- ftpLoginParser(auth, ftpState, FTP_LOGIN_NOT_ESCAPED);
- if (!strcmp(orig_user, ftpState->user)) {
- xfree(orig_user);
- return 1; /* same username */
- }
- strcpy(ftpState->user, orig_user);
- xfree(orig_user);
- return 0; /* different username */
- }
- static void
- ftpCheckUrlpath(FtpStateData * ftpState)
- {
- request_t *request = ftpState->request;
- int l;
- const char *t;
- if ((t = strRChr(request->urlpath, ';')) != NULL) {
- if (strncasecmp(t + 1, "type=", 5) == 0) {
- ftpState->typecode = (char) toupper((int) *(t + 6));
- strCutPtr(request->urlpath, t);
- }
- }
- l = strLen(request->urlpath);
- ftpState->flags.use_base = 1;
- /* check for null path */
- if (!l) {
- stringReset(&request->urlpath, "/");
- ftpState->flags.isdir = 1;
- ftpState->flags.root_dir = 1;
- } else if (!strCmp(request->urlpath, "/%2f/")) {
- /* UNIX root directory */
- ftpState->flags.use_base = 0;
- ftpState->flags.isdir = 1;
- ftpState->flags.root_dir = 1;
- } else if ((l >= 1) && (*(strBuf(request->urlpath) + l - 1) == '/')) {
- /* Directory URL, ending in / */
- ftpState->flags.isdir = 1;
- ftpState->flags.use_base = 0;
- if (l == 1)
- ftpState->flags.root_dir = 1;
- }
- }
- static void
- ftpBuildTitleUrl(FtpStateData * ftpState)
- {
- request_t *request = ftpState->request;
- size_t len;
- char *t;
- len = 64
- + strlen(ftpState->user)
- + strlen(ftpState->password)
- + strlen(request->host)
- + strLen(request->urlpath);
- t = ftpState->title_url = xcalloc(len, 1);
- strcat(t, "ftp://");
- if (strcmp(ftpState->user, "anonymous")) {
- strcat(t, ftpState->user);
- strcat(t, "@");
- }
- strcat(t, request->host);
- if (request->port != urlDefaultPort(PROTO_FTP))
- snprintf(&t[strlen(t)], len - strlen(t), ":%d", request->port);
- strcat(t, strBuf(request->urlpath));
- }
- void
- ftpStart(FwdState * fwd)
- {
- request_t *request = fwd->request;
- StoreEntry *entry = fwd->entry;
- int fd = fwd->server_fd;
- LOCAL_ARRAY(char, realm, 8192);
- const char *url = storeUrl(entry);
- FtpStateData *ftpState = xcalloc(1, sizeof(FtpStateData));
- HttpReply *reply;
- StoreEntry *pe = NULL;
- const cache_key *key = NULL;
- cbdataAdd(ftpState, cbdataXfree, 0);
- debug(9, 3) ("ftpStart: '%s'n", url);
- Counter.server.all.requests++;
- Counter.server.ftp.requests++;
- storeLockObject(entry);
- ftpState->entry = entry;
- ftpState->request = requestLink(request);
- ftpState->ctrl.fd = fd;
- ftpState->data.fd = -1;
- ftpState->size = -1;
- ftpState->flags.pasv_supported = 1;
- ftpState->flags.rest_supported = 1;
- ftpState->fwd = fwd;
- comm_add_close_handler(fd, ftpStateFree, ftpState);
- if (ftpState->request->method == METHOD_PUT)
- ftpState->flags.put = 1;
- if (!ftpCheckAuth(ftpState, &request->header)) {
- /* This request is not fully authenticated */
- if (request->port == 21) {
- snprintf(realm, 8192, "ftp %s", ftpState->user);
- } else {
- snprintf(realm, 8192, "ftp %s port %d",
- ftpState->user, request->port);
- }
- /* eject any old cached object */
- key = storeKeyPublic(entry->mem_obj->url, entry->mem_obj->method);
- if ((pe = storeGet(key)) != NULL)
- storeRelease(pe);
- /* create reply */
- reply = entry->mem_obj->reply;
- assert(reply != NULL);
- /* create appropriate reply */
- ftpAuthRequired(reply, request, realm);
- httpReplySwapOut(reply, entry);
- fwdComplete(ftpState->fwd);
- comm_close(fd);
- return;
- }
- ftpCheckUrlpath(ftpState);
- ftpBuildTitleUrl(ftpState);
- debug(9, 5) ("ftpStart: host=%s, path=%s, user=%s, passwd=%sn",
- ftpState->request->host, strBuf(ftpState->request->urlpath),
- ftpState->user, ftpState->password);
- ftpState->state = BEGIN;
- ftpState->ctrl.last_command = xstrdup("Connect to server");
- ftpState->ctrl.buf = memAllocate(MEM_4K_BUF);
- ftpState->ctrl.freefunc = memFree4K;
- ftpState->ctrl.size = 4096;
- ftpState->ctrl.offset = 0;
- ftpState->data.buf = xmalloc(SQUID_TCP_SO_RCVBUF);
- ftpState->data.size = SQUID_TCP_SO_RCVBUF;
- ftpState->data.freefunc = xfree;
- ftpScheduleReadControlReply(ftpState, 0);
- commSetTimeout(fd, Config.Timeout.read, ftpTimeout, ftpState);
- }
- /* ====================================================================== */
- static void
- ftpWriteCommand(const char *buf, FtpStateData * ftpState)
- {
- debug(9, 5) ("ftpWriteCommand: %sn", buf);
- safe_free(ftpState->ctrl.last_command);
- ftpState->ctrl.last_command = xstrdup(buf);
- comm_write(ftpState->ctrl.fd,
- xstrdup(buf),
- strlen(buf),
- ftpWriteCommandCallback,
- ftpState,
- xfree);
- ftpScheduleReadControlReply(ftpState, 0);
- }
- static void
- ftpWriteCommandCallback(int fd, char *bufnotused, size_t size, int errflag, void *data)
- {
- FtpStateData *ftpState = data;
- StoreEntry *entry = ftpState->entry;
- ErrorState *err;
- debug(9, 7) ("ftpWriteCommandCallback: wrote %d bytesn", size);
- if (size > 0) {
- fd_bytes(fd, size, FD_WRITE);
- kb_incr(&Counter.server.all.kbytes_out, size);
- kb_incr(&Counter.server.ftp.kbytes_out, size);
- }
- if (errflag == COMM_ERR_CLOSING)
- return;
- if (errflag) {
- debug(50, 1) ("ftpWriteCommandCallback: FD %d: %sn", fd, xstrerror());
- if (entry->mem_obj->inmem_hi == 0) {
- err = errorCon(ERR_WRITE_ERROR, HTTP_SERVICE_UNAVAILABLE);
- err->xerrno = errno;
- err->request = requestLink(ftpState->request);
- errorAppendEntry(entry, err);
- }
- comm_close(ftpState->ctrl.fd);
- }
- }
- static wordlist *
- ftpParseControlReply(char *buf, size_t len, int *codep, int *used)
- {
- char *s;
- char *sbuf;
- char *end;
- int usable;
- int complete = 0;
- wordlist *head = NULL;
- wordlist *list;
- wordlist **tail = &head;
- off_t offset;
- size_t linelen;
- int code = -1;
- debug(9, 5) ("ftpParseControlReplyn");
- /*
- * We need a NULL-terminated buffer for scanning, ick
- */
- sbuf = xmalloc(len + 1);
- xstrncpy(sbuf, buf, len + 1);
- end = sbuf + len - 1;
- while (*end != 'r' && *end != 'n' && end > sbuf)
- end--;
- usable = end - sbuf;
- debug(9, 3) ("ftpParseControlReply: usable = %dn", usable);
- if (usable == 0) {
- debug(9, 3) ("ftpParseControlReply: didn't find end of linen");
- safe_free(sbuf);
- return NULL;
- }
- debug(9, 3) ("ftpParseControlReply: %d bytes to play withn", len);
- end++;
- s = sbuf;
- s += strspn(s, crlf);
- for (; s < end; s += strcspn(s, crlf), s += strspn(s, crlf)) {
- if (complete)
- break;
- debug(9, 3) ("ftpParseControlReply: s = {%s}n", s);
- linelen = strcspn(s, crlf) + 1;
- if (linelen < 2)
- break;
- if (linelen > 3)
- complete = (*s >= '0' && *s <= '9' && *(s + 3) == ' ');
- if (complete)
- code = atoi(s);
- offset = 0;
- if (linelen > 3)
- if (*s >= '0' && *s <= '9' && (*(s + 3) == '-' || *(s + 3) == ' '))
- offset = 4;
- list = memAllocate(MEM_WORDLIST);
- list->key = xmalloc(linelen - offset);
- xstrncpy(list->key, s + offset, linelen - offset);
- debug(9, 7) ("%d %sn", code, list->key);
- *tail = list;
- tail = &list->next;
- }
- *used = (int) (s - sbuf);
- safe_free(sbuf);
- if (!complete)
- wordlistDestroy(&head);
- if (codep)
- *codep = code;
- return head;
- }
- static void
- ftpScheduleReadControlReply(FtpStateData * ftpState, int buffered_ok)
- {
- debug(9, 3) ("ftpScheduleReadControlReply: FD %dn", ftpState->ctrl.fd);
- if (buffered_ok && ftpState->ctrl.offset > 0) {
- /* We've already read some reply data */
- ftpHandleControlReply(ftpState);
- } else {
- commSetSelect(ftpState->ctrl.fd,
- COMM_SELECT_READ,
- ftpReadControlReply,
- ftpState,
- Config.Timeout.read);
- }
- }
- static void
- ftpReadControlReply(int fd, void *data)
- {
- FtpStateData *ftpState = data;
- StoreEntry *entry = ftpState->entry;
- int len;
- ErrorState *err;
- debug(9, 5) ("ftpReadControlReplyn");
- assert(ftpState->ctrl.offset < ftpState->ctrl.size);
- Counter.syscalls.sock.reads++;
- len = read(fd,
- ftpState->ctrl.buf + ftpState->ctrl.offset,
- ftpState->ctrl.size - ftpState->ctrl.offset);
- if (len > 0) {
- fd_bytes(fd, len, FD_READ);
- kb_incr(&Counter.server.all.kbytes_in, len);
- kb_incr(&Counter.server.ftp.kbytes_in, len);
- }
- debug(9, 5) ("ftpReadControlReply: FD %d, Read %d bytesn", fd, len);
- if (len < 0) {
- debug(50, 1) ("ftpReadControlReply: read error: %sn", xstrerror());
- if (ignoreErrno(errno)) {
- ftpScheduleReadControlReply(ftpState, 0);
- } else {
- if (entry->mem_obj->inmem_hi == 0) {
- err = errorCon(ERR_READ_ERROR, HTTP_INTERNAL_SERVER_ERROR);
- err->xerrno = errno;
- err->request = requestLink(ftpState->request);
- errorAppendEntry(entry, err);
- }
- comm_close(ftpState->ctrl.fd);
- }
- return;
- }
- if (len == 0) {
- if (entry->store_status == STORE_PENDING) {
- storeReleaseRequest(entry);
- if (entry->mem_obj->inmem_hi == 0) {
- err = errorCon(ERR_FTP_FAILURE, HTTP_INTERNAL_SERVER_ERROR);
- err->xerrno = 0;
- err->request = requestLink(ftpState->request);
- err->ftp_server_msg = ftpState->ctrl.message;
- errorAppendEntry(entry, err);
- }
- }
- comm_close(ftpState->ctrl.fd);
- return;
- }
- len += ftpState->ctrl.offset;
- ftpState->ctrl.offset = len;
- assert(len <= ftpState->ctrl.size);
- ftpHandleControlReply(ftpState);
- }
- static void
- ftpHandleControlReply(FtpStateData * ftpState)
- {
- char *oldbuf;
- wordlist **W, **T;
- int bytes_used = 0;
- wordlistDestroy(&ftpState->ctrl.message);
- ftpState->ctrl.message = ftpParseControlReply(ftpState->ctrl.buf,
- ftpState->ctrl.offset, &ftpState->ctrl.replycode, &bytes_used);
- if (ftpState->ctrl.message == NULL) {
- /* didn't get complete reply yet */
- if (ftpState->ctrl.offset == ftpState->ctrl.size) {
- oldbuf = ftpState->ctrl.buf;
- ftpState->ctrl.buf = xcalloc(ftpState->ctrl.size << 1, 1);
- xmemcpy(ftpState->ctrl.buf, oldbuf, ftpState->ctrl.size);
- ftpState->ctrl.size <<= 1;
- ftpState->ctrl.freefunc(oldbuf);
- ftpState->ctrl.freefunc = xfree;
- }
- ftpScheduleReadControlReply(ftpState, 0);
- return;
- } else if (ftpState->ctrl.offset == bytes_used) {
- /* used it all up */
- ftpState->ctrl.offset = 0;
- } else {
- /* Got some data past the complete reply */
- assert(bytes_used < ftpState->ctrl.offset);
- ftpState->ctrl.offset -= bytes_used;
- xmemmove(ftpState->ctrl.buf, ftpState->ctrl.buf + bytes_used,
- ftpState->ctrl.offset);
- }
- /* Extract reply message (last line) */
- for (T = NULL, W = &ftpState->ctrl.message; *W && (*W)->next; W = &(*W)->next) {
- /* Skip trailing blank lines */
- if (strlen((*W)->key) == 0) {
- if (T == NULL)
- T = W;
- } else if ((*W)->next) {
- T = NULL;
- }
- }
- safe_free(ftpState->ctrl.last_reply);
- ftpState->ctrl.last_reply = (*W)->key;
- safe_free(*W);
- if (T)
- wordlistDestroy(T);
- debug(9, 8) ("ftpReadControlReply: state=%d, code=%dn", ftpState->state,
- ftpState->ctrl.replycode);
- FTP_SM_FUNCS[ftpState->state] (ftpState);
- }
- /* ====================================================================== */
- static void
- ftpReadWelcome(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("ftpReadWelcomen");
- if (ftpState->flags.pasv_only)
- ftpState->login_att++;
- if (code == 220) {
- if (ftpState->ctrl.message) {
- if (strstr(ftpState->ctrl.message->key, "NetWare"))
- ftpState->flags.skip_whitespace = 1;
- if (ftpState->cwd_message)
- wordlistDestroy(&ftpState->cwd_message);
- ftpState->cwd_message = ftpState->ctrl.message;
- ftpState->ctrl.message = NULL;
- }
- ftpSendUser(ftpState);
- } else if (code == 120) {
- if (NULL != ftpState->ctrl.message)
- debug(9, 3) ("FTP server is busy: %sn",
- ftpState->ctrl.message->key);
- return;
- } else {
- ftpFail(ftpState);
- }
- }
- static void
- ftpSendUser(FtpStateData * ftpState)
- {
- if (ftpState->proxy_host != NULL)
- snprintf(cbuf, 1024, "USER %s@%srn",
- ftpState->user,
- ftpState->request->host);
- else
- snprintf(cbuf, 1024, "USER %srn", ftpState->user);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_USER;
- }
- static void
- ftpReadUser(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("ftpReadUsern");
- if (code == 230) {
- ftpReadPass(ftpState);
- } else if (code == 331) {
- ftpSendPass(ftpState);
- } else {
- ftpFail(ftpState);
- }
- }
- static void
- ftpSendPass(FtpStateData * ftpState)
- {
- snprintf(cbuf, 1024, "PASS %srn", ftpState->password);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_PASS;
- }
- static void
- ftpReadPass(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("ftpReadPassn");
- if (ftpState->ctrl.message) {
- if (ftpState->cwd_message)
- wordlistDestroy(&ftpState->cwd_message);
- ftpState->cwd_message = ftpState->ctrl.message;
- ftpState->ctrl.message = NULL;
- }
- if (code == 230) {
- ftpSendType(ftpState);
- } else {
- ftpFail(ftpState);
- }
- }
- static void
- ftpSendType(FtpStateData * ftpState)
- {
- const char *t;
- const char *filename;
- char mode;
- /*
- * Ref section 3.2.2 of RFC 1738
- */
- switch (mode = ftpState->typecode) {
- case 'D':
- mode = 'A';
- break;
- case 'A':
- case 'I':
- break;
- default:
- if (ftpState->flags.isdir) {
- mode = 'A';
- } else {
- t = strRChr(ftpState->request->urlpath, '/');
- filename = t ? t + 1 : strBuf(ftpState->request->urlpath);
- mode = mimeGetTransferMode(filename);
- }
- break;
- }
- if (mode == 'I')
- ftpState->flags.binary = 1;
- else
- ftpState->flags.binary = 0;
- snprintf(cbuf, 1024, "TYPE %crn", mode);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_TYPE;
- }
- static void
- ftpReadType(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- char *path;
- char *d, *p;
- debug(9, 3) ("This is ftpReadTypen");
- if (code == 200) {
- p = path = xstrdup(strBuf(ftpState->request->urlpath));
- if (*p == '/')
- p++;
- while (*p) {
- d = p;
- p += strcspn(p, "/");
- if (*p)
- *p++ = ' ';
- rfc1738_unescape(d);
- wordlistAdd(&ftpState->pathcomps, d);
- }
- xfree(path);
- if (ftpState->pathcomps)
- ftpTraverseDirectory(ftpState);
- else
- ftpListDir(ftpState);
- } else {
- ftpFail(ftpState);
- }
- }
- static void
- ftpTraverseDirectory(FtpStateData * ftpState)
- {
- wordlist *w;
- debug(9, 4) ("ftpTraverseDirectory %sn",
- ftpState->filepath ? ftpState->filepath : "<NULL>");
- safe_free(ftpState->filepath);
- /* Done? */
- if (ftpState->pathcomps == NULL) {
- debug(9, 3) ("the final component was a directoryn");
- ftpListDir(ftpState);
- return;
- }
- /* Go to next path component */
- w = ftpState->pathcomps;
- ftpState->filepath = w->key;
- ftpState->pathcomps = w->next;
- xfree(w);
- /* Check if we are to CWD or RETR */
- if (ftpState->pathcomps != NULL || ftpState->flags.isdir) {
- ftpSendCwd(ftpState);
- } else {
- debug(9, 3) ("final component is probably a filen");
- ftpGetFile(ftpState);
- return;
- }
- }
- static void
- ftpSendCwd(FtpStateData * ftpState)
- {
- char *path = ftpState->filepath;
- debug(9, 3) ("ftpSendCwdn");
- if (!strcmp(path, "..") || !strcmp(path, "/")) {
- ftpState->flags.no_dotdot = 1;
- } else {
- ftpState->flags.no_dotdot = 0;
- }
- if (*path)
- snprintf(cbuf, 1024, "CWD %srn", path);
- else
- snprintf(cbuf, 1024, "CWDrn");
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_CWD;
- }
- static void
- ftpReadCwd(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadCwdn");
- if (code >= 200 && code < 300) {
- /* CWD OK */
- ftpUnhack(ftpState);
- if (ftpState->cwd_message)
- wordlistDestroy(&ftpState->cwd_message);
- ftpState->cwd_message = ftpState->ctrl.message;
- ftpState->ctrl.message = NULL;
- /* Continue to traverse the path */
- ftpTraverseDirectory(ftpState);
- } else {
- /* CWD FAILED */
- if (!ftpState->flags.put)
- ftpFail(ftpState);
- else
- ftpTryMkdir(ftpState);
- }
- }
- static void
- ftpTryMkdir(FtpStateData * ftpState)
- {
- char *path = ftpState->filepath;
- debug(9, 3) ("ftpTryMkdir: with path=%sn", path);
- snprintf(cbuf, 1024, "MKD %srn", path);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_MKDIR;
- }
- static void
- ftpReadMkdir(FtpStateData * ftpState)
- {
- char *path = ftpState->filepath;
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("ftpReadMkdir: path %s, code %dn", path, code);
- if (code == 257) { /* success */
- ftpSendCwd(ftpState);
- } else if (code == 550) { /* dir exists */
- if (ftpState->flags.put_mkdir) {
- ftpState->flags.put_mkdir = 1;
- ftpSendCwd(ftpState);
- } else
- ftpSendReply(ftpState);
- } else
- ftpSendReply(ftpState);
- }
- static void
- ftpGetFile(FtpStateData * ftpState)
- {
- assert(*ftpState->filepath != ' ');
- ftpState->flags.isdir = 0;
- ftpSendMdtm(ftpState);
- }
- static void
- ftpListDir(FtpStateData * ftpState)
- {
- if (!ftpState->flags.isdir) {
- debug(9, 3) ("Directory path did not end in /n");
- strcat(ftpState->title_url, "/");
- ftpState->flags.isdir = 1;
- ftpState->flags.use_base = 1;
- }
- ftpSendPasv(ftpState);
- }
- static void
- ftpSendMdtm(FtpStateData * ftpState)
- {
- assert(*ftpState->filepath != ' ');
- snprintf(cbuf, 1024, "MDTM %srn", ftpState->filepath);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_MDTM;
- }
- static void
- ftpReadMdtm(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadMdtmn");
- if (code == 213) {
- ftpState->mdtm = parse_iso3307_time(ftpState->ctrl.last_reply);
- ftpUnhack(ftpState);
- } else if (code < 0) {
- ftpFail(ftpState);
- }
- ftpSendSize(ftpState);
- }
- static void
- ftpSendSize(FtpStateData * ftpState)
- {
- /* Only send SIZE for binary transfers. The returned size
- * is useless on ASCII transfers */
- if (ftpState->flags.binary) {
- assert(ftpState->filepath != NULL);
- assert(*ftpState->filepath != ' ');
- snprintf(cbuf, 1024, "SIZE %srn", ftpState->filepath);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_SIZE;
- } else
- /* Skip to next state no non-binary transfers */
- ftpSendPasv(ftpState);
- }
- static void
- ftpReadSize(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadSizen");
- if (code == 213) {
- ftpUnhack(ftpState);
- ftpState->size = atoi(ftpState->ctrl.last_reply);
- } else if (code < 0) {
- ftpFail(ftpState);
- }
- ftpSendPasv(ftpState);
- }
- static void
- ftpSendPasv(FtpStateData * ftpState)
- {
- int fd;
- struct sockaddr_in addr;
- socklen_t addr_len;
- if (ftpState->data.fd >= 0) {
- if (!ftpState->flags.datachannel_hack) {
- /* We are already connected, reuse this connection. */
- ftpRestOrList(ftpState);
- return;
- } else {
- /* Close old connection */
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- }
- }
- if (!ftpState->flags.pasv_supported) {
- ftpSendPort(ftpState);
- return;
- }
- addr_len = sizeof(addr);
- if (getsockname(ftpState->ctrl.fd, (struct sockaddr *) &addr, &addr_len)) {
- debug(9, 0) ("ftpSendPasv: getsockname(%d,..): %sn",
- ftpState->ctrl.fd, xstrerror());
- addr.sin_addr = Config.Addrs.tcp_outgoing;
- }
- /* Open data channel with the same local address as control channel */
- fd = comm_open(SOCK_STREAM,
- 0,
- addr.sin_addr,
- 0,
- COMM_NONBLOCKING,
- storeUrl(ftpState->entry));
- debug(9, 3) ("ftpSendPasv: Unconnected data socket created on FD %dn", fd);
- if (fd < 0) {
- ftpFail(ftpState);
- return;
- }
- /*
- * No comm_add_close_handler() here. If we have both ctrl and
- * data FD's call ftpStateFree() upon close, then we have
- * to delete the close handler which did NOT get called
- * to prevent ftpStateFree() getting called twice.
- * Instead we'll always call comm_close() on the ctrl FD.
- */
- ftpState->data.fd = fd;
- snprintf(cbuf, 1024, "PASVrn");
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_PASV;
- }
- static void
- ftpReadPasv(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- int h1, h2, h3, h4;
- int p1, p2;
- int n;
- u_short port;
- int fd = ftpState->data.fd;
- char *buf = ftpState->ctrl.last_reply;
- LOCAL_ARRAY(char, junk, 1024);
- debug(9, 3) ("This is ftpReadPasvn");
- if (code != 227) {
- debug(9, 3) ("PASV not supported by remote endn");
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- ftpSendPort(ftpState);
- return;
- }
- if ((int) strlen(buf) > 1024) {
- debug(9, 1) ("ftpReadPasv: Avoiding potential buffer overflown");
- ftpSendPort(ftpState);
- return;
- }
- /* 227 Entering Passive Mode (h1,h2,h3,h4,p1,p2). */
- /* ANSI sez [^0-9] is undefined, it breaks on Watcom cc */
- debug(9, 5) ("scanning: %sn", buf);
- n = sscanf(buf, "%[^0123456789]%d,%d,%d,%d,%d,%d",
- junk, &h1, &h2, &h3, &h4, &p1, &p2);
- if (n != 7 || p1 < 0 || p2 < 0 || p1 > 255 || p2 > 255) {
- debug(9, 3) ("Bad 227 replyn");
- debug(9, 3) ("n=%d, p1=%d, p2=%dn", n, p1, p2);
- ftpSendPort(ftpState);
- return;
- }
- snprintf(junk, 1024, "%d.%d.%d.%d", h1, h2, h3, h4);
- if (!safe_inet_addr(junk, NULL)) {
- debug(9, 1) ("unsafe address (%s)n", junk);
- ftpSendPort(ftpState);
- return;
- }
- port = ((p1 << 8) + p2);
- if (0 == port) {
- debug(9, 1) ("ftpReadPasv: Invalid PASV reply: %sn", buf);
- ftpSendPort(ftpState);
- return;
- }
- debug(9, 5) ("ftpReadPasv: connecting to %s, port %dn", junk, port);
- ftpState->data.port = port;
- ftpState->data.host = xstrdup(junk);
- commConnectStart(fd, junk, port, ftpPasvCallback, ftpState);
- }
- static void
- ftpPasvCallback(int fd, int status, void *data)
- {
- FtpStateData *ftpState = data;
- request_t *request = ftpState->request;
- ErrorState *err;
- debug(9, 3) ("ftpPasvCallbackn");
- if (status != COMM_OK) {
- err = errorCon(ERR_CONNECT_FAIL, HTTP_SERVICE_UNAVAILABLE);
- err->xerrno = errno;
- err->host = xstrdup(ftpState->data.host);
- err->port = ftpState->data.port;
- err->request = requestLink(request);
- errorAppendEntry(ftpState->entry, err);
- comm_close(ftpState->ctrl.fd);
- return;
- }
- ftpRestOrList(ftpState);
- }
- static int
- ftpOpenListenSocket(FtpStateData * ftpState, int fallback)
- {
- int fd;
- struct sockaddr_in addr;
- socklen_t addr_len;
- int on = 1;
- u_short port = 0;
- /*
- * Set up a listen socket on the same local address as the
- * control connection.
- */
- addr_len = sizeof(addr);
- if (getsockname(ftpState->ctrl.fd, (struct sockaddr *) &addr, &addr_len)) {
- debug(9, 0) ("ftpOpenListenSocket: getsockname(%d,..): %sn",
- ftpState->ctrl.fd, xstrerror());
- return -1;
- }
- /*
- * REUSEADDR is needed in fallback mode, since the same port is
- * used for both control and data.
- */
- if (fallback) {
- setsockopt(ftpState->ctrl.fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on));
- port = ntohs(addr.sin_port);
- }
- fd = comm_open(SOCK_STREAM,
- 0,
- addr.sin_addr,
- port,
- COMM_NONBLOCKING | (fallback ? COMM_REUSEADDR : 0),
- storeUrl(ftpState->entry));
- debug(9, 3) ("ftpOpenListenSocket: Unconnected data socket created on FD %dn", fd);
- if (fd < 0) {
- debug(9, 0) ("ftpOpenListenSocket: comm_open failedn");
- return -1;
- }
- if (comm_listen(fd) < 0) {
- comm_close(fd);
- return -1;
- }
- ftpState->data.fd = fd;
- ftpState->data.port = comm_local_port(fd);;
- ftpState->data.host = NULL;
- return fd;
- }
- static void
- ftpSendPort(FtpStateData * ftpState)
- {
- int fd;
- struct sockaddr_in addr;
- socklen_t addr_len;
- unsigned char *addrptr;
- unsigned char *portptr;
- debug(9, 3) ("This is ftpSendPortn");
- ftpState->flags.pasv_supported = 0;
- fd = ftpOpenListenSocket(ftpState, 0);
- addr_len = sizeof(addr);
- if (getsockname(fd, (struct sockaddr *) &addr, &addr_len)) {
- debug(9, 0) ("ftpSendPort: getsockname(%d,..): %sn", fd, xstrerror());
- /* XXX Need to set error message */
- ftpFail(ftpState);
- return;
- }
- addrptr = (unsigned char *) &addr.sin_addr.s_addr;
- portptr = (unsigned char *) &addr.sin_port;
- snprintf(cbuf, 1024, "PORT %d,%d,%d,%d,%d,%drn",
- addrptr[0], addrptr[1], addrptr[2], addrptr[3],
- portptr[0], portptr[1]);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_PORT;
- }
- static void
- ftpReadPort(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadPortn");
- if (code != 200) {
- /* Fall back on using the same port as the control connection */
- debug(9, 3) ("PORT not supported by remote endn");
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- ftpOpenListenSocket(ftpState, 1);
- }
- ftpRestOrList(ftpState);
- }
- /* "read" handler to accept data connection */
- static void
- ftpAcceptDataConnection(int fd, void *data)
- {
- FtpStateData *ftpState = data;
- struct sockaddr_in peer, me;
- debug(9, 3) ("ftpAcceptDataConnectionn");
- fd = comm_accept(fd, &peer, &me);
- if (fd < 0) {
- debug(9, 1) ("ftpHandleDataAccept: comm_accept(%d): %s", fd, xstrerror());
- /* XXX Need to set error message */
- ftpFail(ftpState);
- return;
- }
- /* Replace the Listen socket with the accepted data socket */
- comm_close(ftpState->data.fd);
- debug(9, 3) ("ftpAcceptDataConnection: Connected data socket on FD %dn", fd);
- ftpState->data.fd = fd;
- ftpState->data.port = ntohs(peer.sin_port);
- ftpState->data.host = xstrdup(inet_ntoa(peer.sin_addr));
- commSetTimeout(ftpState->ctrl.fd, -1, NULL, NULL);
- commSetTimeout(ftpState->data.fd, Config.Timeout.read, ftpTimeout,
- ftpState);
- /* XXX We should have a flag to track connect state...
- * host NULL -> not connected, port == local port
- * host set -> connected, port == remote port
- */
- /* Restart state (SENT_NLST/LIST/RETR) */
- FTP_SM_FUNCS[ftpState->state] (ftpState);
- }
- static void
- ftpRestOrList(FtpStateData * ftpState)
- {
- debug(9, 3) ("This is ftpRestOrListn");
- if (ftpState->flags.put) {
- debug(9, 3) ("ftpRestOrList: Sending STOR request...n");
- ftpSendStor(ftpState);
- } else if (ftpState->typecode == 'D') {
- /* XXX This should NOT be here */
- ftpSendNlst(ftpState); /* sec 3.2.2 of RFC 1738 */
- ftpState->flags.isdir = 1;
- ftpState->flags.use_base = 1;
- } else if (ftpState->flags.isdir)
- ftpSendList(ftpState);
- else if (ftpRestartable(ftpState))
- ftpSendRest(ftpState);
- else
- ftpSendRetr(ftpState);
- }
- static void
- ftpSendStor(FtpStateData * ftpState)
- {
- assert(ftpState->filepath != NULL);
- snprintf(cbuf, 1024, "STOR %srn", ftpState->filepath);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_STOR;
- }
- static void
- ftpReadStor(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadStorn");
- if (code >= 100 && code < 200) {
- /*
- * Cancel the timeout on the Control socket, pumpStart will
- * establish one on the data socket.
- */
- commSetTimeout(ftpState->ctrl.fd, -1, NULL, NULL);
- ftpPutStart(ftpState);
- debug(9, 3) ("ftpReadStor: writing data channeln");
- ftpState->state = WRITING_DATA;
- } else if (code == 553) {
- /* directory does not exist, have to create, sigh */
- #if WORK_IN_PROGRESS
- ftpTraverseDirectory(ftpState);
- #endif
- ftpSendReply(ftpState);
- } else {
- debug(9, 3) ("ftpReadStor: that's all folksn");
- ftpSendReply(ftpState);
- }
- }
- static void
- ftpSendRest(FtpStateData * ftpState)
- {
- snprintf(cbuf, 1024, "REST %drn", ftpState->restart_offset);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_REST;
- }
- static int
- ftpRestartable(FtpStateData * ftpState)
- {
- if (ftpState->restart_offset > 0)
- return 1;
- if (!ftpState->request->range)
- return 0;
- if (!ftpState->flags.binary)
- return 0;
- if (ftpState->size <= 0)
- return 0;
- ftpState->restart_offset = httpHdrRangeLowestOffset(ftpState->request->range, (size_t) ftpState->size);
- if (ftpState->restart_offset <= 0)
- return 0;
- return 1;
- }
- static void
- ftpReadRest(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadRestn");
- assert(ftpState->restart_offset > 0);
- if (code == 350) {
- ftpState->restarted_offset = ftpState->restart_offset;
- ftpSendRetr(ftpState);
- } else if (code > 0) {
- debug(9, 3) ("ftpReadRest: REST not supportedn");
- ftpState->flags.rest_supported = 0;
- ftpSendRetr(ftpState);
- } else {
- ftpFail(ftpState);
- }
- }
- static void
- ftpSendList(FtpStateData * ftpState)
- {
- if (ftpState->filepath) {
- ftpState->flags.use_base = 1;
- snprintf(cbuf, 1024, "LIST %srn", ftpState->filepath);
- } else {
- snprintf(cbuf, 1024, "LISTrn");
- }
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_LIST;
- }
- static void
- ftpSendNlst(FtpStateData * ftpState)
- {
- ftpState->flags.tried_nlst = 1;
- if (ftpState->filepath) {
- ftpState->flags.use_base = 1;
- snprintf(cbuf, 1024, "NLST %srn", ftpState->filepath);
- } else {
- snprintf(cbuf, 1024, "NLSTrn");
- }
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_NLST;
- }
- static void
- ftpReadList(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadListn");
- if (code == 125 || (code == 150 && ftpState->data.host)) {
- /* Begin data transfer */
- ftpAppendSuccessHeader(ftpState);
- commSetSelect(ftpState->data.fd,
- COMM_SELECT_READ,
- ftpDataRead,
- ftpState,
- Config.Timeout.read);
- commSetDefer(ftpState->data.fd, fwdCheckDeferRead, ftpState->entry);
- ftpState->state = READING_DATA;
- /*
- * Cancel the timeout on the Control socket and establish one
- * on the data socket
- */
- commSetTimeout(ftpState->ctrl.fd, -1, NULL, NULL);
- commSetTimeout(ftpState->data.fd, Config.Timeout.read, ftpTimeout, ftpState);
- return;
- } else if (code == 150) {
- /* Accept data channel */
- commSetSelect(ftpState->data.fd,
- COMM_SELECT_READ,
- ftpAcceptDataConnection,
- ftpState,
- 0);
- /*
- * Cancel the timeout on the Control socket and establish one
- * on the data socket
- */
- commSetTimeout(ftpState->ctrl.fd, -1, NULL, NULL);
- commSetTimeout(ftpState->data.fd, Config.Timeout.read, ftpTimeout, ftpState);
- return;
- } else if (!ftpState->flags.tried_nlst && code > 300) {
- ftpSendNlst(ftpState);
- } else {
- ftpFail(ftpState);
- return;
- }
- }
- static void
- ftpSendRetr(FtpStateData * ftpState)
- {
- assert(ftpState->filepath != NULL);
- snprintf(cbuf, 1024, "RETR %srn", ftpState->filepath);
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_RETR;
- }
- static void
- ftpReadRetr(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadRetrn");
- if (code == 125 || (code == 150 && ftpState->data.host)) {
- /* Begin data transfer */
- debug(9, 3) ("ftpReadRetr: reading data channeln");
- ftpAppendSuccessHeader(ftpState);
- commSetSelect(ftpState->data.fd,
- COMM_SELECT_READ,
- ftpDataRead,
- ftpState,
- Config.Timeout.read);
- commSetDefer(ftpState->data.fd, fwdCheckDeferRead, ftpState->entry);
- ftpState->state = READING_DATA;
- /*
- * Cancel the timeout on the Control socket and establish one
- * on the data socket
- */
- commSetTimeout(ftpState->ctrl.fd, -1, NULL, NULL);
- commSetTimeout(ftpState->data.fd, Config.Timeout.read, ftpTimeout,
- ftpState);
- } else if (code == 150) {
- /* Accept data channel */
- commSetSelect(ftpState->data.fd,
- COMM_SELECT_READ,
- ftpAcceptDataConnection,
- ftpState,
- 0);
- /*
- * Cancel the timeout on the Control socket and establish one
- * on the data socket
- */
- commSetTimeout(ftpState->ctrl.fd, -1, NULL, NULL);
- commSetTimeout(ftpState->data.fd, Config.Timeout.read, ftpTimeout,
- ftpState);
- } else if (code >= 300) {
- if (!ftpState->flags.try_slash_hack) {
- /* Try this as a directory missing trailing slash... */
- ftpHackShortcut(ftpState, ftpSendCwd);
- } else {
- ftpFail(ftpState);
- }
- } else {
- ftpFail(ftpState);
- }
- }
- static void
- ftpReadTransferDone(FtpStateData * ftpState)
- {
- int code = ftpState->ctrl.replycode;
- debug(9, 3) ("This is ftpReadTransferDonen");
- if (code != 226) {
- debug(9, 1) ("ftpReadTransferDone: Got code %d after reading datan",
- code);
- debug(9, 1) ("--> releasing '%s'n", storeUrl(ftpState->entry));
- storeReleaseRequest(ftpState->entry);
- }
- ftpDataTransferDone(ftpState);
- }
- static void
- ftpDataTransferDone(FtpStateData * ftpState)
- {
- debug(9, 3) ("This is ftpDataTransferDonen");
- if (ftpState->data.fd > -1) {
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- }
- ftpSendQuit(ftpState);
- }
- static void
- ftpSendQuit(FtpStateData * ftpState)
- {
- assert(ftpState->ctrl.fd > -1);
- snprintf(cbuf, 1024, "QUITrn");
- ftpWriteCommand(cbuf, ftpState);
- ftpState->state = SENT_QUIT;
- }
- static void
- ftpReadQuit(FtpStateData * ftpState)
- {
- comm_close(ftpState->ctrl.fd);
- }
- static void
- ftpTrySlashHack(FtpStateData * ftpState)
- {
- char *path;
- ftpState->flags.try_slash_hack = 1;
- /* Free old paths */
- if (ftpState->pathcomps)
- wordlistDestroy(&ftpState->pathcomps);
- safe_free(ftpState->filepath);
- /* Build the new path (urlpath begins with /) */
- path = xstrdup(strBuf(ftpState->request->urlpath));
- rfc1738_unescape(path);
- ftpState->filepath = path;
- /* And off we go */
- ftpGetFile(ftpState);
- }
- static void
- ftpTryDatachannelHack(FtpStateData * ftpState)
- {
- ftpState->flags.datachannel_hack = 1;
- /* we have to undo some of the slash hack... */
- if (ftpState->old_filepath != NULL) {
- ftpState->flags.try_slash_hack = 0;
- safe_free(ftpState->filepath);
- ftpState->filepath = ftpState->old_filepath;
- ftpState->old_filepath = NULL;
- }
- ftpState->flags.tried_nlst = 0;
- /* And off we go */
- if (ftpState->flags.isdir) {
- ftpListDir(ftpState);
- } else {
- ftpGetFile(ftpState);
- }
- return;
- }
- /* Forget hack status. Next error is shown to the user */
- static void
- ftpUnhack(FtpStateData * ftpState)
- {
- if (ftpState->old_request != NULL) {
- safe_free(ftpState->old_request);
- safe_free(ftpState->old_reply);
- }
- }
- static void
- ftpHackShortcut(FtpStateData * ftpState, FTPSM * nextState)
- {
- /* Clear some unwanted state */
- ftpState->restarted_offset = 0;
- ftpState->restart_offset = 0;
- /* Save old error message & some state info */
- if (ftpState->old_request == NULL) {
- ftpState->old_request = ftpState->ctrl.last_command;
- ftpState->ctrl.last_command = NULL;
- ftpState->old_reply = ftpState->ctrl.last_reply;
- ftpState->ctrl.last_reply = NULL;
- if (ftpState->pathcomps == NULL && ftpState->filepath != NULL)
- ftpState->old_filepath = xstrdup(ftpState->filepath);
- }
- /* Jump to the "hack" state */
- nextState(ftpState);
- }
- static void
- ftpFail(FtpStateData * ftpState)
- {
- ErrorState *err;
- debug(9, 3) ("ftpFailn");
- /* Try the / hack to support "Netscape" FTP URL's for retreiving files */
- if (!ftpState->flags.isdir && /* Not a directory */
- !ftpState->flags.try_slash_hack && /* Not in slash hack */
- ftpState->mdtm <= 0 && ftpState->size < 0 && /* Not known as a file */
- strNCaseCmp(ftpState->request->urlpath, "/%2f", 4) != 0) { /* No slash encoded */
- switch (ftpState->state) {
- case SENT_CWD:
- case SENT_RETR:
- /* Try the / hack */
- ftpHackShortcut(ftpState, ftpTrySlashHack);
- return;
- default:
- break;
- }
- }
- /* Try to reopen datachannel */
- if (!ftpState->flags.datachannel_hack &&
- ftpState->pathcomps == NULL) {
- switch (ftpState->state) {
- case SENT_RETR:
- case SENT_LIST:
- case SENT_NLST:
- /* Try to reopen datachannel */
- ftpHackShortcut(ftpState, ftpTryDatachannelHack);
- return;
- default:
- break;
- }
- }
- /* Translate FTP errors into HTTP errors */
- err = NULL;
- switch (ftpState->state) {
- case SENT_USER:
- case SENT_PASS:
- if (ftpState->ctrl.replycode > 500)
- err = errorCon(ERR_FTP_FORBIDDEN, HTTP_FORBIDDEN);
- else if (ftpState->ctrl.replycode == 421)
- err = errorCon(ERR_FTP_UNAVAILABLE, HTTP_SERVICE_UNAVAILABLE);
- break;
- case SENT_CWD:
- case SENT_RETR:
- if (ftpState->ctrl.replycode == 550)
- err = errorCon(ERR_FTP_NOT_FOUND, HTTP_NOT_FOUND);
- break;
- default:
- break;
- }
- if (err == NULL)
- err = errorCon(ERR_FTP_FAILURE, HTTP_BAD_GATEWAY);
- err->request = requestLink(ftpState->request);
- err->ftp_server_msg = ftpState->ctrl.message;
- if (ftpState->old_request)
- err->ftp.request = ftpState->old_request;
- else
- err->ftp.request = ftpState->ctrl.last_command;
- if (err->ftp.request) {
- if (!strncmp(err->ftp.request, "PASS", 4))
- err->ftp.request = "PASS <yourpassword>";
- }
- if (ftpState->old_reply)
- err->ftp.reply = ftpState->old_reply;
- else
- err->ftp.reply = ftpState->ctrl.last_reply;
- errorAppendEntry(ftpState->entry, err);
- comm_close(ftpState->ctrl.fd);
- }
- static void
- ftpPutStart(FtpStateData * ftpState)
- {
- debug(9, 3) ("ftpPutStartn");
- pumpStart(ftpState->data.fd, ftpState->fwd, ftpPutTransferDone, ftpState);
- }
- static void
- ftpPutTransferDone(int fd, char *bufnotused, size_t size, int errflag, void *data)
- {
- FtpStateData *ftpState = data;
- if (ftpState->data.fd >= 0) {
- comm_close(ftpState->data.fd);
- ftpState->data.fd = -1;
- }
- ftpReadComplete(ftpState);
- }
- static void
- ftpSendReply(FtpStateData * ftpState)
- {
- ErrorState *err;
- int code = ftpState->ctrl.replycode;
- http_status http_code;
- err_type err_code = ERR_NONE;
- debug(9, 5) ("ftpSendReply: %s, code %dn",
- storeUrl(ftpState->entry), code);
- if (cbdataValid(ftpState))
- debug(9, 5) ("ftpSendReply: ftpState (%p) is valid!n", ftpState);
- if (code == 226) {
- err_code = (ftpState->mdtm > 0) ? ERR_FTP_PUT_MODIFIED : ERR_FTP_PUT_CREATED;
- http_code = (ftpState->mdtm > 0) ? HTTP_ACCEPTED : HTTP_CREATED;
- } else {
- err_code = ERR_FTP_PUT_ERROR;
- http_code = HTTP_INTERNAL_SERVER_ERROR;
- }
- err = errorCon(err_code, http_code);
- err->request = requestLink(ftpState->request);
- if (ftpState->old_request)
- err->ftp.request = ftpState->old_request;
- else
- err->ftp.request = ftpState->ctrl.last_command;
- if (ftpState->old_reply)
- err->ftp.reply = ftpState->old_reply;
- else
- err->ftp.reply = ftpState->ctrl.last_reply;
- errorAppendEntry(ftpState->entry, err);
- storeBufferFlush(ftpState->entry);
- comm_close(ftpState->ctrl.fd);
- }
- static void
- ftpAppendSuccessHeader(FtpStateData * ftpState)
- {
- char *mime_type = NULL;
- char *mime_enc = NULL;
- String urlpath = ftpState->request->urlpath;
- const char *filename = NULL;
- const char *t = NULL;
- StoreEntry *e = ftpState->entry;
- StoreEntry *pe = NULL;
- http_reply *reply = e->mem_obj->reply;
- if (ftpState->flags.http_header_sent)
- return;
- ftpState->flags.http_header_sent = 1;
- assert(e->mem_obj->inmem_hi == 0);
- EBIT_CLR(e->flags, ENTRY_FWD_HDR_WAIT);
- filename = (t = strRChr(urlpath, '/')) ? t + 1 : strBuf(urlpath);
- if (ftpState->flags.isdir) {
- mime_type = "text/html";
- } else {
- switch (ftpState->typecode) {
- case 'I':
- mime_type = "application/octet-stream";
- mime_enc = mimeGetContentEncoding(filename);
- break;
- case 'A':
- mime_type = "text/plain";
- break;
- default:
- mime_type = mimeGetContentType(filename);
- mime_enc = mimeGetContentEncoding(filename);
- break;
- }
- }
- storeBuffer(e);
- httpReplyReset(reply);
- /* set standard stuff */
- if (ftpState->restarted_offset) {
- /* Partial reply */
- HttpHdrRangeSpec range_spec;
- range_spec.offset = ftpState->restarted_offset;
- range_spec.length = ftpState->size - ftpState->restarted_offset;
- httpReplySetHeaders(reply, 1.0, HTTP_PARTIAL_CONTENT, "Gatewaying",
- mime_type, ftpState->size - ftpState->restarted_offset, ftpState->mdtm, -2);
- httpHeaderAddContRange(&reply->header, range_spec, ftpState->size);
- } else {
- /* Full reply */
- httpReplySetHeaders(reply, 1.0, HTTP_OK, "Gatewaying",
- mime_type, ftpState->size, ftpState->mdtm, -2);
- }
- /* additional info */
- if (mime_enc)
- httpHeaderPutStr(&reply->header, HDR_CONTENT_ENCODING, mime_enc);
- httpReplySwapOut(reply, e);
- storeBufferFlush(e);
- reply->hdr_sz = e->mem_obj->inmem_hi;
- storeTimestampsSet(e);
- if (ftpState->flags.authenticated) {
- /*
- * Authenticated requests can't be cached. Eject any old cached
- * object
- */
- pe = storeGetPublic(e->mem_obj->url, e->mem_obj->method);
- if (pe)
- storeRelease(pe);
- storeRelease(e);
- } else if (EBIT_TEST(e->flags, ENTRY_CACHABLE) && !ftpState->restarted_offset) {
- storeSetPublicKey(e);
- } else {
- storeRelease(e);
- }
- }
- static void
- ftpAuthRequired(HttpReply * old_reply, request_t * request, const char *realm)
- {
- ErrorState *err = errorCon(ERR_ACCESS_DENIED, HTTP_UNAUTHORIZED);
- HttpReply *rep;
- err->request = requestLink(request);
- rep = errorBuildReply(err);
- errorStateFree(err);
- /* add Authenticate header */
- httpHeaderPutAuth(&rep->header, "Basic", realm);
- /* move new reply to the old one */
- httpReplyAbsorb(old_reply, rep);
- }
- char *
- ftpUrlWith2f(const request_t * request)
- {
- LOCAL_ARRAY(char, buf, MAX_URL);
- LOCAL_ARRAY(char, loginbuf, MAX_LOGIN_SZ + 1);
- LOCAL_ARRAY(char, portbuf, 32);
- char *t;
- portbuf[0] = ' ';
- if (request->protocol != PROTO_FTP)
- return NULL;
- if (request->port != urlDefaultPort(request->protocol))
- snprintf(portbuf, 32, ":%d", request->port);
- loginbuf[0] = ' ';
- if ((int) strlen(request->login) > 0) {
- strcpy(loginbuf, request->login);
- if ((t = strchr(loginbuf, ':')))
- *t = ' ';
- strcat(loginbuf, "@");
- }
- snprintf(buf, MAX_URL, "%s://%s%s%s%s%s",
- ProtocolStr[request->protocol],
- loginbuf,
- request->host,
- portbuf,
- "/%2f",
- strBuf(request->urlpath));
- if ((t = strchr(buf, '?')))
- *t = ' ';
- return buf;
- }