2 * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)ftpd.c 8.4 (Berkeley) 4/16/94
34 * $FreeBSD: src/libexec/ftpd/ftpd.c,v 1.213 2008/12/23 01:23:09 cperciva Exp $
35 * $DragonFly: src/libexec/ftpd/ftpd.c,v 1.7 2005/10/28 18:06:57 joerg Exp $
41 #include <sys/param.h>
42 #include <sys/ioctl.h>
44 #include <sys/socket.h>
49 #include <netinet/in.h>
50 #include <netinet/in_systm.h>
51 #include <netinet/ip.h>
52 #include <netinet/tcp.h>
56 #include <arpa/inet.h>
57 #include <arpa/telnet.h>
80 #include <login_cap.h>
84 #include <security/pam_appl.h>
87 #include "pathnames.h"
93 static char version[] = "Version 6.00LS";
96 extern off_t restart_point;
99 union sockunion ctrl_addr;
100 union sockunion data_source;
101 union sockunion data_dest;
102 union sockunion his_addr;
103 union sockunion pasv_addr;
108 int hostinfo = 1; /* print host-specific info in messages */
113 int timeout = 900; /* timeout after 15 minutes of inactivity */
114 int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
116 int restricted_data_ports = 1;
117 int paranoid = 1; /* be extra careful about security */
118 int anon_only = 0; /* Only anonymous ftp allowed */
119 int assumeutf8 = 0; /* Assume that server file names are in UTF-8 */
128 int stru; /* avoid C keyword */
130 int usedefault = 1; /* for data transfers */
131 int pdata = -1; /* for passive mode */
132 int readonly = 0; /* Server is in readonly mode. */
133 int noepsv = 0; /* EPSV command is disabled. */
134 int noretr = 0; /* RETR command is disabled. */
135 int noguestretr = 0; /* RETR command is disabled for anon users. */
136 int noguestmkd = 0; /* MKD command is disabled for anon users. */
137 int noguestmod = 1; /* anon users may not modify existing files. */
141 #if !defined(CMASK) || CMASK == 0
145 int defumask = CMASK; /* default umask value */
150 #ifdef VIRTUAL_HOSTING
153 static struct ftphost {
154 struct ftphost *next;
155 struct addrinfo *hostinfo;
161 } *thishost, *firsthost;
164 char remotehost[NI_MAXHOST];
167 static char ttyline[20];
168 char *tty = ttyline; /* for klogin */
171 static int auth_pam(struct passwd**, const char*);
172 pam_handle_t *pamh = NULL;
175 static struct opie opiedata;
176 static char opieprompt[OPIE_CHALLENGE_MAX+1];
179 char *pid_file = NULL; /* means default location to pidfile(3) */
182 * Limit number of pathnames that glob can return.
183 * A limit of 0 indicates the number of pathnames is unlimited.
185 #define MAXGLOBARGS 16384
189 * Timeout intervals for retrying connections
190 * to hosts that don't accept PORT cmds. This
191 * is a kludge, but given the problems with TCP...
193 #define SWAITMAX 90 /* wait at most 90 seconds */
194 #define SWAITINT 5 /* interval between retries */
196 int swaitmax = SWAITMAX;
197 int swaitint = SWAITINT;
200 #ifdef OLD_SETPROCTITLE
201 char **Argv = NULL; /* pointer to argument vector */
202 char *LastArgv = NULL; /* end of argv */
203 #endif /* OLD_SETPROCTITLE */
204 char proctitle[LINE_MAX]; /* initial part of title */
205 #endif /* SETPROCTITLE */
207 #define LOGCMD(cmd, file) logcmd((cmd), (file), NULL, -1)
208 #define LOGCMD2(cmd, file1, file2) logcmd((cmd), (file1), (file2), -1)
209 #define LOGBYTES(cmd, file, cnt) logcmd((cmd), (file), NULL, (cnt))
211 static volatile sig_atomic_t recvurg;
212 static int transflag; /* NB: for debugging only */
214 #define STARTXFER flagxfer(1)
215 #define ENDXFER flagxfer(0)
217 #define START_UNSAFE maskurg(1)
218 #define END_UNSAFE maskurg(0)
220 /* It's OK to put an `else' clause after this macro. */
221 #define CHECKOOB(action) \
230 #ifdef VIRTUAL_HOSTING
231 static void inithosts(int);
232 static void selecthost(union sockunion *);
234 static void ack(char *);
235 static void sigurg(int);
236 static void maskurg(int);
237 static void flagxfer(int);
238 static int myoob(void);
239 static int checkuser(char *, char *, int, char **);
240 static FILE *dataconn(char *, off_t, char *);
241 static void dolog(struct sockaddr *);
242 static void end_login(void);
243 static FILE *getdatasock(char *);
244 static int guniquefd(char *, char **);
245 static void lostconn(int);
246 static void sigquit(int);
247 static int receive_data(FILE *, FILE *);
248 static int send_data(FILE *, FILE *, size_t, off_t, int);
249 static struct passwd *
251 static char *sgetsave(char *);
252 static void reapchild(int);
253 static void appendf(char **, char *, ...) __printflike(2, 3);
254 static void logcmd(char *, char *, char *, off_t);
255 static void logxfer(char *, off_t, time_t);
256 static char *doublequote(char *);
257 static int *socksetup(int, char *, const char *);
260 main(int argc, char *argv[], char **envp)
264 char *cp, line[LINE_MAX];
266 char *bindname = NULL;
267 const char *bindport = "ftp";
268 int family = AF_UNSPEC;
271 tzset(); /* in case no timezone database in ~ftp */
272 sigemptyset(&sa.sa_mask);
273 sa.sa_flags = SA_RESTART;
275 #ifdef OLD_SETPROCTITLE
277 * Save start and extent of argv for setproctitle.
282 LastArgv = envp[-1] + strlen(envp[-1]);
283 #endif /* OLD_SETPROCTITLE */
286 * Prevent diagnostic messages from appearing on stderr.
287 * We run as a daemon or from inetd; in both cases, there's
288 * more reason in logging to syslog.
290 freopen(_PATH_DEVNULL, "w", stderr);
294 * LOG_NDELAY sets up the logging connection immediately,
295 * necessary for anonymous ftp's that chroot and can't do it later.
297 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
299 while ((ch = getopt(argc, argv,
300 "468a:AdDEH:hlmMoOp:P:rRSt:T:u:UvW")) != -1) {
303 family = (family == AF_INET6) ? AF_UNSPEC : AF_INET;
307 family = (family == AF_INET) ? AF_UNSPEC : AF_INET6;
343 logging++; /* > 1 == extra logging */
383 timeout = atoi(optarg);
384 if (maxtimeout < timeout)
385 maxtimeout = timeout;
389 maxtimeout = atoi(optarg);
390 if (timeout > maxtimeout)
391 timeout = maxtimeout;
398 val = strtol(optarg, &optarg, 8);
399 if (*optarg != '\0' || val < 0)
400 syslog(LOG_WARNING, "bad value for -u");
406 restricted_data_ports = 0;
418 syslog(LOG_WARNING, "unknown flag -%c ignored", optopt);
424 int *ctl_sock, fd, maxfd = -1, nfds, i;
425 fd_set defreadfds, readfds;
429 if ((pfh = pidfile_open(pid_file, 0600, &pid)) == NULL) {
430 if (errno == EEXIST) {
431 syslog(LOG_ERR, "%s already running, pid %d",
432 getprogname(), (int)pid);
435 syslog(LOG_WARNING, "pidfile_open: %m");
439 * Detach from parent.
441 if (daemon(1, 1) < 0) {
442 syslog(LOG_ERR, "failed to become a daemon");
446 if (pfh != NULL && pidfile_write(pfh) == -1)
447 syslog(LOG_WARNING, "pidfile_write: %m");
449 sa.sa_handler = reapchild;
450 sigaction(SIGCHLD, &sa, NULL);
452 #ifdef VIRTUAL_HOSTING
457 * Open a socket, bind it to the FTP port, and start
460 ctl_sock = socksetup(family, bindname, bindport);
461 if (ctl_sock == NULL)
464 FD_ZERO(&defreadfds);
465 for (i = 1; i <= *ctl_sock; i++) {
466 FD_SET(ctl_sock[i], &defreadfds);
467 if (listen(ctl_sock[i], 32) < 0) {
468 syslog(LOG_ERR, "control listen: %m");
471 if (maxfd < ctl_sock[i])
476 * Loop forever accepting connection requests and forking off
477 * children to handle them.
480 FD_COPY(&defreadfds, &readfds);
481 nfds = select(maxfd + 1, &readfds, NULL, NULL, 0);
483 if (nfds < 0 && errno != EINTR)
484 syslog(LOG_WARNING, "select: %m");
489 for (i = 1; i <= *ctl_sock; i++)
490 if (FD_ISSET(ctl_sock[i], &readfds)) {
491 addrlen = sizeof(his_addr);
492 fd = accept(ctl_sock[i],
493 (struct sockaddr *)&his_addr,
500 switch (pid = fork()) {
506 for (i = 1; i <= *ctl_sock; i++)
512 syslog(LOG_WARNING, "fork: %m");
520 addrlen = sizeof(his_addr);
521 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
522 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
526 #ifdef VIRTUAL_HOSTING
527 if (his_addr.su_family == AF_INET6 &&
528 IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr))
531 family = his_addr.su_family;
537 sa.sa_handler = SIG_DFL;
538 sigaction(SIGCHLD, &sa, NULL);
540 sa.sa_handler = sigurg;
541 sa.sa_flags = 0; /* don't restart syscalls for SIGURG */
542 sigaction(SIGURG, &sa, NULL);
544 sigfillset(&sa.sa_mask); /* block all signals in handler */
545 sa.sa_flags = SA_RESTART;
546 sa.sa_handler = sigquit;
547 sigaction(SIGHUP, &sa, NULL);
548 sigaction(SIGINT, &sa, NULL);
549 sigaction(SIGQUIT, &sa, NULL);
550 sigaction(SIGTERM, &sa, NULL);
552 sa.sa_handler = lostconn;
553 sigaction(SIGPIPE, &sa, NULL);
555 addrlen = sizeof(ctrl_addr);
556 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
557 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
560 dataport = ntohs(ctrl_addr.su_port) - 1; /* as per RFC 959 */
561 #ifdef VIRTUAL_HOSTING
562 /* select our identity from virtual host table */
563 selecthost(&ctrl_addr);
566 if (ctrl_addr.su_family == AF_INET)
568 tos = IPTOS_LOWDELAY;
569 if (setsockopt(0, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
570 syslog(LOG_WARNING, "control setsockopt (IP_TOS): %m");
574 * Disable Nagle on the control channel so that we don't have to wait
575 * for peer's ACK before issuing our next reply.
577 if (setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
578 syslog(LOG_WARNING, "control setsockopt (TCP_NODELAY): %m");
580 data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1);
582 /* set this here so klogin can use it... */
583 snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid());
585 /* Try to handle urgent data inline */
587 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on)) < 0)
588 syslog(LOG_WARNING, "control setsockopt (SO_OOBINLINE): %m");
592 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
593 syslog(LOG_ERR, "fcntl F_SETOWN: %m");
595 dolog((struct sockaddr *)&his_addr);
597 * Set up default state
606 /* If logins are disabled, print out the message. */
607 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
608 while (fgets(line, sizeof(line), fd) != NULL) {
609 if ((cp = strchr(line, '\n')) != NULL)
611 lreply(530, "%s", line);
615 reply(530, "System not available.");
618 #ifdef VIRTUAL_HOSTING
619 fd = fopen(thishost->welcome, "r");
621 fd = fopen(_PATH_FTPWELCOME, "r");
624 while (fgets(line, sizeof(line), fd) != NULL) {
625 if ((cp = strchr(line, '\n')) != NULL)
627 lreply(220, "%s", line);
631 /* reply(220,) must follow */
633 #ifndef VIRTUAL_HOSTING
634 if (hostname == NULL) {
635 if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
636 fatalerror("Ran out of memory.");
637 if (gethostname(hostname, MAXHOSTNAMELEN - 1) < 0)
639 hostname[MAXHOSTNAMELEN - 1] = '\0';
643 reply(220, "%s FTP server (%s) ready.", hostname, version);
645 reply(220, "FTP server ready.");
656 syslog(LOG_DEBUG, "lost connection");
664 syslog(LOG_ERR, "got signal %d", signo);
668 #ifdef VIRTUAL_HOSTING
670 * read in virtual host tables (if they exist)
674 inithosts(int family)
679 char *cp, *mp, *line;
680 char *vhost, *anonuser, *statfile, *welcome, *loginmsg;
681 struct ftphost *hrp, *lhrp;
682 struct addrinfo hints, *res, *ai;
685 * Fill in the default host information
687 if (hostname == NULL) {
688 if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
689 fatalerror("Ran out of memory.");
690 if (gethostname(hostname, MAXHOSTNAMELEN - 1) < 0)
692 hostname[MAXHOSTNAMELEN - 1] = '\0';
694 if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
695 fatalerror("Ran out of memory.");
696 hrp->hostname = hostname;
697 hrp->hostinfo = NULL;
699 memset(&hints, 0, sizeof(hints));
700 hints.ai_flags = AI_PASSIVE;
701 hints.ai_family = family;
702 hints.ai_socktype = SOCK_STREAM;
703 if (getaddrinfo(hrp->hostname, NULL, &hints, &res) == 0)
705 hrp->statfile = _PATH_FTPDSTATFILE;
706 hrp->welcome = _PATH_FTPWELCOME;
707 hrp->loginmsg = _PATH_FTPLOGINMESG;
708 hrp->anonuser = "ftp";
710 thishost = firsthost = lhrp = hrp;
711 if ((fp = fopen(_PATH_FTPHOSTS, "r")) != NULL) {
712 int addrsize, gothost;
716 while ((line = fgetln(fp, &len)) != NULL) {
722 if (line[len - 1] == '\n') {
723 line[len - 1] = '\0';
726 if ((mp = malloc(len + 1)) == NULL)
727 fatalerror("Ran out of memory.");
728 memcpy(mp, line, len);
732 cp = strtok(line, " \t");
733 /* skip empty lines */
740 statfile = _PATH_FTPDSTATFILE;
741 welcome = _PATH_FTPWELCOME;
742 loginmsg = _PATH_FTPLOGINMESG;
745 * Preparse the line so we can use its info
746 * for all the addresses associated with
747 * the virtual host name.
748 * Field 0, the virtual host name, is special:
749 * it's already parsed off and will be strdup'ed
750 * later, after we know its canonical form.
752 for (i = 1; i < 5 && (cp = strtok(NULL, " \t")); i++)
753 if (*cp != '-' && (cp = strdup(cp)))
755 case 1: /* anon user permissions */
758 case 2: /* statistics file */
761 case 3: /* welcome message */
764 case 4: /* login message */
767 default: /* programming error */
772 hints.ai_flags = AI_PASSIVE;
773 hints.ai_family = family;
774 hints.ai_socktype = SOCK_STREAM;
775 if (getaddrinfo(vhost, NULL, &hints, &res) != 0)
777 for (ai = res; ai != NULL && ai->ai_addr != NULL;
781 for (hrp = firsthost; hrp != NULL; hrp = hrp->next) {
784 for (hi = hrp->hostinfo; hi != NULL;
786 if (hi->ai_addrlen == ai->ai_addrlen &&
789 ai->ai_addr->sa_len) == 0) {
797 if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
799 hrp->hostname = NULL;
802 if (hrp->hostinfo && hrp->hostinfo != res)
803 freeaddrinfo(hrp->hostinfo);
804 insert = 0; /* host already in the chain */
809 * determine hostname to use.
810 * force defined name if there is a valid alias
811 * otherwise fallback to primary hostname
813 /* XXX: getaddrinfo() can't do alias check */
814 switch(hrp->hostinfo->ai_family) {
816 addr = &((struct sockaddr_in *)hrp->hostinfo->ai_addr)->sin_addr;
817 addrsize = sizeof(struct in_addr);
820 addr = &((struct sockaddr_in6 *)hrp->hostinfo->ai_addr)->sin6_addr;
821 addrsize = sizeof(struct in6_addr);
824 /* should not reach here */
825 freeaddrinfo(hrp->hostinfo);
827 free(hrp); /*not in chain, can free*/
829 hrp->hostinfo = NULL; /*mark as blank*/
833 if ((hp = getipnodebyaddr(addr, addrsize,
834 hrp->hostinfo->ai_family,
835 &hp_error)) != NULL) {
836 if (strcmp(vhost, hp->h_name) != 0) {
837 if (hp->h_aliases == NULL)
841 while (hp->h_aliases[i] &&
842 strcmp(vhost, hp->h_aliases[i]) != 0)
844 if (hp->h_aliases[i] == NULL)
850 strcmp(hrp->hostname, vhost) != 0) {
852 hrp->hostname = NULL;
854 if (hrp->hostname == NULL &&
855 (hrp->hostname = strdup(vhost)) == NULL) {
856 freeaddrinfo(hrp->hostinfo);
857 hrp->hostinfo = NULL; /* mark as blank */
862 hrp->anonuser = anonuser;
863 hrp->statfile = statfile;
864 hrp->welcome = welcome;
865 hrp->loginmsg = loginmsg;
883 selecthost(union sockunion *su)
888 struct in6_addr *mapped_in6 = NULL;
894 * XXX IPv4 mapped IPv6 addr consideraton,
895 * specified in rfc2373.
897 if (su->su_family == AF_INET6 &&
898 IN6_IS_ADDR_V4MAPPED(&su->su_sin6.sin6_addr))
899 mapped_in6 = &su->su_sin6.sin6_addr;
902 hrp = thishost = firsthost; /* default */
905 while (hrp != NULL) {
906 for (hi = hrp->hostinfo; hi != NULL; hi = hi->ai_next) {
907 if (memcmp(su, hi->ai_addr, hi->ai_addrlen) == 0) {
912 /* XXX IPv4 mapped IPv6 addr consideraton */
913 if (hi->ai_addr->sa_family == AF_INET && mapped_in6 != NULL &&
914 (memcmp(&mapped_in6->s6_addr[12],
915 &((struct sockaddr_in *)hi->ai_addr)->sin_addr,
916 sizeof(struct in_addr)) == 0)) {
926 /* setup static variables as appropriate */
927 hostname = thishost->hostname;
928 ftpuser = thishost->anonuser;
933 * Helper function for sgetpwnam().
938 char *new = malloc(strlen(s) + 1);
941 reply(421, "Ran out of memory.");
950 * Save the result of a getpwnam. Used for USER command, since
951 * the data returned must not be clobbered by any other command
953 * NB: The data returned by sgetpwnam() will remain valid until
954 * the next call to this function. Its difference from getpwnam()
955 * is that sgetpwnam() is known to be called from ftpd code only.
957 static struct passwd *
958 sgetpwnam(char *name)
960 static struct passwd save;
963 if ((p = getpwnam(name)) == NULL)
967 free(save.pw_passwd);
973 save.pw_name = sgetsave(p->pw_name);
974 save.pw_passwd = sgetsave(p->pw_passwd);
975 save.pw_gecos = sgetsave(p->pw_gecos);
976 save.pw_dir = sgetsave(p->pw_dir);
977 save.pw_shell = sgetsave(p->pw_shell);
981 static int login_attempts; /* number of failed login attempts */
982 static int askpasswd; /* had user command, ask for passwd */
983 static char curname[MAXLOGNAME]; /* current USER name */
987 * Sets global passwd pointer pw if named account exists and is acceptable;
988 * sets askpasswd if a PASS command is expected. If logged in previously,
989 * need to reset state. If name is "ftp" or "anonymous", the name is not in
990 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
991 * If account doesn't exist, ask for passwd anyway. Otherwise, check user
992 * requesting login privileges. Disallow anyone who does not have a standard
993 * shell as returned by getusershell(). Disallow anyone mentioned in the file
994 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
1003 reply(530, "Can't change user from guest login.");
1005 } else if (dochroot) {
1006 reply(530, "Can't change user from chroot user.");
1013 #ifdef VIRTUAL_HOSTING
1014 pw = sgetpwnam(thishost->anonuser);
1016 pw = sgetpwnam("ftp");
1018 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
1019 if (checkuser(_PATH_FTPUSERS, "ftp", 0, NULL) ||
1020 checkuser(_PATH_FTPUSERS, "anonymous", 0, NULL))
1021 reply(530, "User %s access denied.", name);
1022 else if (pw != NULL) {
1026 "Guest login ok, send your email address as password.");
1028 reply(530, "User %s unknown.", name);
1029 if (!askpasswd && logging)
1031 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost);
1034 if (anon_only != 0) {
1035 reply(530, "Sorry, only anonymous ftp allowed.");
1039 if ((pw = sgetpwnam(name))) {
1040 if ((shell = pw->pw_shell) == NULL || *shell == 0)
1041 shell = _PATH_BSHELL;
1043 while ((cp = getusershell()) != NULL)
1044 if (strcmp(cp, shell) == 0)
1048 if (cp == NULL || checkuser(_PATH_FTPUSERS, name, 1, NULL)) {
1049 reply(530, "User %s access denied.", name);
1052 "FTP LOGIN REFUSED FROM %s, %s",
1059 strncpy(curname, name, sizeof(curname)-1);
1063 /* XXX Kluge! The conversation mechanism needs to be fixed. */
1065 if (opiechallenge(&opiedata, name, opieprompt) == 0) {
1066 pwok = (pw != NULL) &&
1067 opieaccessfile(remotehost) &&
1068 opiealways(pw->pw_dir);
1069 reply(331, "Response to %s %s for %s.",
1070 opieprompt, pwok ? "requested" : "required", name);
1073 reply(331, "Password required for %s.", name);
1077 * Delay before reading passwd after first failed
1078 * attempt to slow down passwd-guessing programs.
1081 sleep(login_attempts);
1085 * Check if a user is in the file "fname",
1086 * return a pointer to a malloc'd string with the rest
1087 * of the matching line in "residue" if not NULL.
1090 checkuser(char *fname, char *name, int pwset, char **residue)
1095 char *line, *mp, *p;
1097 if ((fd = fopen(fname, "r")) != NULL) {
1098 while (!found && (line = fgetln(fd, &len)) != NULL) {
1102 if (line[len - 1] == '\n') {
1103 line[len - 1] = '\0';
1106 if ((mp = malloc(len + 1)) == NULL)
1107 fatalerror("Ran out of memory.");
1108 memcpy(mp, line, len);
1112 /* avoid possible leading and trailing whitespace */
1113 p = strtok(line, " \t");
1114 /* skip empty lines */
1118 * if first chr is '@', check group membership
1124 if (p[1] == '\0') /* single @ matches anyone */
1127 if ((grp = getgrnam(p+1)) == NULL)
1130 * Check user's default group
1132 if (pwset && grp->gr_gid == pw->pw_gid)
1135 * Check supplementary groups
1137 while (!found && grp->gr_mem[i])
1138 found = strcmp(name,
1144 * Otherwise, just check for username match
1147 found = strcmp(p, name) == 0;
1149 * Save the rest of line to "residue" if matched
1151 if (found && residue) {
1152 if ((p = strtok(NULL, "")) != NULL)
1153 p += strspn(p, " \t");
1155 if ((*residue = strdup(p)) == NULL)
1156 fatalerror("Ran out of memory.");
1170 * Terminate login as previous user, if any, resetting state;
1171 * used when USER command is given or login fails.
1181 if (logged_in && dowtmp)
1182 ftpd_logwtmp(ttyline, "", NULL);
1185 /* XXX Missing LOGIN_SETMAC */
1186 setusercontext(NULL, getpwuid(0), 0,
1187 LOGIN_SETPRIORITY|LOGIN_SETRESOURCES|LOGIN_SETUMASK);
1191 if ((e = pam_setcred(pamh, PAM_DELETE_CRED)) != PAM_SUCCESS)
1192 syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
1193 if ((e = pam_close_session(pamh,0)) != PAM_SUCCESS)
1194 syslog(LOG_ERR, "pam_close_session: %s", pam_strerror(pamh, e));
1195 if ((e = pam_end(pamh, e)) != PAM_SUCCESS)
1196 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1208 * the following code is stolen from imap-uw PAM authentication module and
1211 #define COPY_STRING(s) (s ? strdup(s) : NULL)
1214 const char *uname; /* user name */
1215 const char *pass; /* password */
1217 typedef struct cred_t cred_t;
1220 auth_conv(int num_msg, const struct pam_message **msg,
1221 struct pam_response **resp, void *appdata)
1224 cred_t *cred = (cred_t *) appdata;
1225 struct pam_response *reply;
1227 reply = calloc(num_msg, sizeof *reply);
1231 for (i = 0; i < num_msg; i++) {
1232 switch (msg[i]->msg_style) {
1233 case PAM_PROMPT_ECHO_ON: /* assume want user name */
1234 reply[i].resp_retcode = PAM_SUCCESS;
1235 reply[i].resp = COPY_STRING(cred->uname);
1236 /* PAM frees resp. */
1238 case PAM_PROMPT_ECHO_OFF: /* assume want password */
1239 reply[i].resp_retcode = PAM_SUCCESS;
1240 reply[i].resp = COPY_STRING(cred->pass);
1241 /* PAM frees resp. */
1245 reply[i].resp_retcode = PAM_SUCCESS;
1246 reply[i].resp = NULL;
1248 default: /* unknown message style */
1250 return PAM_CONV_ERR;
1259 * Attempt to authenticate the user using PAM. Returns 0 if the user is
1260 * authenticated, or 1 if not authenticated. If some sort of PAM system
1261 * error occurs (e.g., the "/etc/pam.conf" file is missing) then this
1262 * function returns -1. This can be used as an indication that we should
1263 * fall back to a different authentication mechanism.
1266 auth_pam(struct passwd **ppw, const char *pass)
1268 const char *tmpl_user;
1272 cred_t auth_cred = { (*ppw)->pw_name, pass };
1273 struct pam_conv conv = { &auth_conv, &auth_cred };
1275 e = pam_start("ftpd", (*ppw)->pw_name, &conv, &pamh);
1276 if (e != PAM_SUCCESS) {
1278 * In OpenPAM, it's OK to pass NULL to pam_strerror()
1279 * if context creation has failed in the first place.
1281 syslog(LOG_ERR, "pam_start: %s", pam_strerror(NULL, e));
1285 e = pam_set_item(pamh, PAM_RHOST, remotehost);
1286 if (e != PAM_SUCCESS) {
1287 syslog(LOG_ERR, "pam_set_item(PAM_RHOST): %s",
1288 pam_strerror(pamh, e));
1289 if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
1290 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1296 e = pam_authenticate(pamh, 0);
1300 * With PAM we support the concept of a "template"
1301 * user. The user enters a login name which is
1302 * authenticated by PAM, usually via a remote service
1303 * such as RADIUS or TACACS+. If authentication
1304 * succeeds, a different but related "template" name
1305 * is used for setting the credentials, shell, and
1306 * home directory. The name the user enters need only
1307 * exist on the remote authentication server, but the
1308 * template name must be present in the local password
1311 * This is supported by two various mechanisms in the
1312 * individual modules. However, from the application's
1313 * point of view, the template user is always passed
1314 * back as a changed value of the PAM_USER item.
1316 if ((e = pam_get_item(pamh, PAM_USER, &item)) ==
1318 tmpl_user = (const char *) item;
1319 if (strcmp((*ppw)->pw_name, tmpl_user) != 0)
1320 *ppw = getpwnam(tmpl_user);
1322 syslog(LOG_ERR, "Couldn't get PAM_USER: %s",
1323 pam_strerror(pamh, e));
1328 case PAM_USER_UNKNOWN:
1334 syslog(LOG_ERR, "pam_authenticate: %s", pam_strerror(pamh, e));
1340 e = pam_acct_mgmt(pamh, 0);
1341 if (e != PAM_SUCCESS) {
1342 syslog(LOG_ERR, "pam_acct_mgmt: %s",
1343 pam_strerror(pamh, e));
1349 if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
1350 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1357 #endif /* USE_PAM */
1365 login_cap_t *lc = NULL;
1370 char *residue = NULL;
1373 if (logged_in || askpasswd == 0) {
1374 reply(503, "Login with USER first.");
1378 if (!guest) { /* "ftp" is only account allowed no password */
1380 rval = 1; /* failure below */
1384 rval = auth_pam(&pw, passwd);
1390 if (opieverify(&opiedata, passwd) == 0)
1391 xpasswd = pw->pw_passwd;
1393 xpasswd = crypt(passwd, pw->pw_passwd);
1394 if (passwd[0] == '\0' && pw->pw_passwd[0] != '\0')
1400 rval = strcmp(pw->pw_passwd, xpasswd);
1401 if (pw->pw_expire && time(NULL) >= pw->pw_expire)
1402 rval = 1; /* failure */
1405 * If rval == 1, the user failed the authentication check
1406 * above. If rval == 0, either PAM or local authentication
1410 reply(530, "Login incorrect.");
1413 "FTP LOGIN FAILED FROM %s",
1415 syslog(LOG_AUTHPRIV | LOG_NOTICE,
1416 "FTP LOGIN FAILED FROM %s, %s",
1417 remotehost, curname);
1420 if (login_attempts++ >= 5) {
1422 "repeated login failures from %s",
1429 login_attempts = 0; /* this time successful */
1430 if (setegid(pw->pw_gid) < 0) {
1431 reply(550, "Can't set gid.");
1434 /* May be overridden by login.conf */
1437 if ((lc = login_getpwclass(pw)) != NULL) {
1438 char remote_ip[NI_MAXHOST];
1440 if (getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
1441 remote_ip, sizeof(remote_ip) - 1, NULL, 0,
1444 remote_ip[sizeof(remote_ip) - 1] = 0;
1445 if (!auth_hostok(lc, remotehost, remote_ip)) {
1446 syslog(LOG_INFO|LOG_AUTH,
1447 "FTP LOGIN FAILED (HOST) as %s: permission denied.",
1449 reply(530, "Permission denied.");
1453 if (!auth_timeok(lc, time(NULL))) {
1454 reply(530, "Login not available right now.");
1459 /* XXX Missing LOGIN_SETMAC */
1460 setusercontext(lc, pw, 0,
1461 LOGIN_SETLOGIN|LOGIN_SETGROUP|LOGIN_SETPRIORITY|
1462 LOGIN_SETRESOURCES|LOGIN_SETUMASK);
1464 setlogin(pw->pw_name);
1465 initgroups(pw->pw_name, pw->pw_gid);
1470 if ((e = pam_open_session(pamh, 0)) != PAM_SUCCESS) {
1471 syslog(LOG_ERR, "pam_open_session: %s", pam_strerror(pamh, e));
1472 } else if ((e = pam_setcred(pamh, PAM_ESTABLISH_CRED)) != PAM_SUCCESS) {
1473 syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
1478 /* open wtmp before chroot */
1480 ftpd_logwtmp(ttyline, pw->pw_name,
1481 (struct sockaddr *)&his_addr);
1484 if (guest && stats && statfd < 0)
1485 #ifdef VIRTUAL_HOSTING
1486 statfd = open(thishost->statfile, O_WRONLY|O_APPEND);
1488 statfd = open(_PATH_FTPDSTATFILE, O_WRONLY|O_APPEND);
1494 checkuser(_PATH_FTPCHROOT, pw->pw_name, 1, &residue)
1495 #ifdef LOGIN_CAP /* Allow login.conf configuration as well */
1496 || login_getcapbool(lc, "ftp-chroot", 0)
1501 * For a chrooted local user,
1502 * a) see whether ftpchroot(5) specifies a chroot directory,
1503 * b) extract the directory pathname from the line,
1504 * c) expand it to the absolute pathname if necessary.
1506 if (dochroot && residue &&
1507 (chrootdir = strtok(residue, " \t")) != NULL) {
1508 if (chrootdir[0] != '/')
1509 asprintf(&chrootdir, "%s/%s", pw->pw_dir, chrootdir);
1511 chrootdir = strdup(chrootdir); /* make it permanent */
1512 if (chrootdir == NULL)
1513 fatalerror("Ran out of memory.");
1515 if (guest || dochroot) {
1517 * If no chroot directory set yet, use the login directory.
1518 * Copy it so it can be modified while pw->pw_dir stays intact.
1520 if (chrootdir == NULL &&
1521 (chrootdir = strdup(pw->pw_dir)) == NULL)
1522 fatalerror("Ran out of memory.");
1524 * Check for the "/chroot/./home" syntax,
1525 * separate the chroot and home directory pathnames.
1527 if ((homedir = strstr(chrootdir, "/./")) != NULL) {
1528 *(homedir++) = '\0'; /* wipe '/' */
1529 homedir++; /* skip '.' */
1532 * We MUST do a chdir() after the chroot. Otherwise
1533 * the old current directory will be accessible as "."
1534 * outside the new root!
1539 * Finally, do chroot()
1541 if (chroot(chrootdir) < 0) {
1542 reply(550, "Can't change root.");
1545 } else /* real user w/o chroot */
1546 homedir = pw->pw_dir;
1548 * Set euid *before* doing chdir() so
1549 * a) the user won't be carried to a directory that he couldn't reach
1550 * on his own due to no permission to upper path components,
1551 * b) NFS mounted homedirs w/restrictive permissions will be accessible
1552 * (uid 0 has no root power over NFS if not mapped explicitly.)
1554 if (seteuid(pw->pw_uid) < 0) {
1555 reply(550, "Can't set uid.");
1558 if (chdir(homedir) < 0) {
1559 if (guest || dochroot) {
1560 reply(550, "Can't change to base directory.");
1563 if (chdir("/") < 0) {
1564 reply(550, "Root is inaccessible.");
1567 lreply(230, "No directory! Logging in with home=/.");
1572 * Display a login message, if it exists.
1573 * N.B. reply(230,) must follow the message.
1575 #ifdef VIRTUAL_HOSTING
1576 fd = fopen(thishost->loginmsg, "r");
1578 fd = fopen(_PATH_FTPLOGINMESG, "r");
1581 char *cp, line[LINE_MAX];
1583 while (fgets(line, sizeof(line), fd) != NULL) {
1584 if ((cp = strchr(line, '\n')) != NULL)
1586 lreply(230, "%s", line);
1594 ident = strdup(passwd);
1596 fatalerror("Ran out of memory.");
1598 reply(230, "Guest login ok, access restrictions apply.");
1600 #ifdef VIRTUAL_HOSTING
1601 if (thishost != firsthost)
1602 snprintf(proctitle, sizeof(proctitle),
1603 "%s: anonymous(%s)/%s", remotehost, hostname,
1607 snprintf(proctitle, sizeof(proctitle),
1608 "%s: anonymous/%s", remotehost, passwd);
1609 setproctitle("%s", proctitle);
1610 #endif /* SETPROCTITLE */
1612 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s",
1613 remotehost, passwd);
1616 reply(230, "User %s logged in, "
1617 "access restrictions apply.", pw->pw_name);
1619 reply(230, "User %s logged in.", pw->pw_name);
1622 snprintf(proctitle, sizeof(proctitle),
1623 "%s: user/%s", remotehost, pw->pw_name);
1624 setproctitle("%s", proctitle);
1625 #endif /* SETPROCTITLE */
1627 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s",
1628 remotehost, pw->pw_name);
1630 if (logging && (guest || dochroot))
1631 syslog(LOG_INFO, "session root changed to %s", chrootdir);
1639 /* Forget all about it... */
1649 retrieve(char *cmd, char *name)
1653 int (*closefunc)(FILE *);
1657 fin = fopen(name, "r"), closefunc = fclose;
1662 snprintf(line, sizeof(line), cmd, name), name = line;
1663 fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose;
1665 st.st_blksize = BUFSIZ;
1669 perror_reply(550, name);
1671 LOGCMD("get", name);
1678 if (fstat(fileno(fin), &st) < 0) {
1679 perror_reply(550, name);
1682 if (!S_ISREG(st.st_mode)) {
1684 * Never sending a raw directory is a workaround
1685 * for buggy clients that will attempt to RETR
1686 * a directory before listing it, e.g., Mozilla.
1687 * Preventing a guest from getting irregular files
1688 * is a simple security measure.
1690 if (S_ISDIR(st.st_mode) || guest) {
1691 reply(550, "%s: not a plain file.", name);
1695 /* st.st_blksize is set for all descriptor types */
1698 if (restart_point) {
1699 if (type == TYPE_A) {
1706 if ((c=getc(fin)) == EOF) {
1707 perror_reply(550, name);
1713 } else if (lseek(fileno(fin), restart_point, L_SET) < 0) {
1714 perror_reply(550, name);
1718 dout = dataconn(name, st.st_size, "w");
1722 send_data(fin, dout, st.st_blksize, st.st_size,
1723 restart_point == 0 && cmd == 0 && S_ISREG(st.st_mode));
1724 if (cmd == 0 && guest && stats && byte_count > 0)
1725 logxfer(name, byte_count, start);
1731 LOGBYTES("get", name, byte_count);
1736 store(char *name, char *mode, int unique)
1740 int (*closefunc)(FILE *);
1742 if (*mode == 'a') { /* APPE */
1744 /* Programming error */
1745 syslog(LOG_ERR, "Internal: unique flag to APPE");
1748 if (guest && noguestmod) {
1749 reply(550, "Appending to existing file denied.");
1752 restart_point = 0; /* not affected by preceding REST */
1754 if (unique) /* STOU overrides REST */
1756 if (guest && noguestmod) {
1757 if (restart_point) { /* guest STOR w/REST */
1758 reply(550, "Modifying existing file denied.");
1760 } else /* treat guest STOR as STOU */
1765 mode = "r+"; /* so ASCII manual seek can work */
1767 if ((fd = guniquefd(name, &name)) < 0)
1769 fout = fdopen(fd, mode);
1771 fout = fopen(name, mode);
1774 perror_reply(553, name);
1778 if (restart_point) {
1779 if (type == TYPE_A) {
1786 if ((c=getc(fout)) == EOF) {
1787 perror_reply(550, name);
1794 * We must do this seek to "current" position
1795 * because we are changing from reading to
1798 if (fseeko(fout, 0, SEEK_CUR) < 0) {
1799 perror_reply(550, name);
1802 } else if (lseek(fileno(fout), restart_point, L_SET) < 0) {
1803 perror_reply(550, name);
1807 din = dataconn(name, -1, "r");
1810 if (receive_data(din, fout) == 0) {
1812 reply(226, "Transfer complete (unique file name:%s).",
1815 reply(226, "Transfer complete.");
1821 LOGBYTES(*mode == 'a' ? "append" : "put", name, byte_count);
1825 LOGCMD(*mode == 'a' ? "append" : "put" , name);
1830 getdatasock(char *mode)
1832 int on = 1, s, t, tries;
1835 return (fdopen(data, mode));
1837 s = socket(data_dest.su_family, SOCK_STREAM, 0);
1840 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
1841 syslog(LOG_WARNING, "data setsockopt (SO_REUSEADDR): %m");
1842 /* anchor socket to avoid multi-homing problems */
1843 data_source = ctrl_addr;
1844 data_source.su_port = htons(dataport);
1846 for (tries = 1; ; tries++) {
1848 * We should loop here since it's possible that
1849 * another ftpd instance has passed this point and is
1850 * trying to open a data connection in active mode now.
1851 * Until the other connection is opened, we'll be getting
1852 * EADDRINUSE because no SOCK_STREAM sockets in the system
1853 * can share both local and remote addresses, localIP:20
1854 * and *:* in this case.
1856 if (bind(s, (struct sockaddr *)&data_source,
1857 data_source.su_len) >= 0)
1859 if (errno != EADDRINUSE || tries > 10)
1863 seteuid(pw->pw_uid);
1865 if (data_source.su_family == AF_INET)
1867 on = IPTOS_THROUGHPUT;
1868 if (setsockopt(s, IPPROTO_IP, IP_TOS, &on, sizeof(int)) < 0)
1869 syslog(LOG_WARNING, "data setsockopt (IP_TOS): %m");
1874 * Turn off push flag to keep sender TCP from sending short packets
1875 * at the boundaries of each write().
1878 if (setsockopt(s, IPPROTO_TCP, TCP_NOPUSH, &on, sizeof on) < 0)
1879 syslog(LOG_WARNING, "data setsockopt (TCP_NOPUSH): %m");
1881 return (fdopen(s, mode));
1883 /* Return the real value of errno (close may change it) */
1885 seteuid(pw->pw_uid);
1892 dataconn(char *name, off_t size, char *mode)
1896 int retry = 0, tos, conerrno;
1901 snprintf(sizebuf, sizeof(sizebuf),
1902 " (%jd bytes)", (intmax_t)size);
1906 union sockunion from;
1907 socklen_t fromlen = ctrl_addr.su_len;
1909 struct timeval timeout;
1913 FD_SET(pdata, &set);
1915 timeout.tv_usec = 0;
1916 timeout.tv_sec = 120;
1919 * Granted a socket is in the blocking I/O mode,
1920 * accept() will block after a successful select()
1921 * if the selected connection dies in between.
1922 * Therefore set the non-blocking I/O flag here.
1924 if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
1925 fcntl(pdata, F_SETFL, flags | O_NONBLOCK) == -1)
1927 if (select(pdata+1, &set, NULL, NULL, &timeout) <= 0 ||
1928 (s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0)
1933 * Unset the inherited non-blocking I/O flag
1934 * on the child socket so stdio can work on it.
1936 if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
1937 fcntl(pdata, F_SETFL, flags & ~O_NONBLOCK) == -1)
1940 if (from.su_family == AF_INET)
1942 tos = IPTOS_THROUGHPUT;
1943 if (setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
1944 syslog(LOG_WARNING, "pdata setsockopt (IP_TOS): %m");
1947 reply(150, "Opening %s mode data connection for '%s'%s.",
1948 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
1949 return (fdopen(pdata, mode));
1951 reply(425, "Can't open data connection.");
1957 reply(125, "Using existing data connection for '%s'%s.",
1960 return (fdopen(data, mode));
1963 data_dest = his_addr;
1966 file = getdatasock(mode);
1968 char hostbuf[NI_MAXHOST], portbuf[NI_MAXSERV];
1970 if (getnameinfo((struct sockaddr *)&data_source,
1972 hostbuf, sizeof(hostbuf) - 1,
1973 portbuf, sizeof(portbuf) - 1,
1974 NI_NUMERICHOST|NI_NUMERICSERV))
1975 *hostbuf = *portbuf = 0;
1976 hostbuf[sizeof(hostbuf) - 1] = 0;
1977 portbuf[sizeof(portbuf) - 1] = 0;
1978 reply(425, "Can't create data socket (%s,%s): %s.",
1979 hostbuf, portbuf, strerror(errno));
1982 data = fileno(file);
1984 if (connect(data, (struct sockaddr *)&data_dest,
1985 data_dest.su_len) == 0)
1990 if (conerrno == EADDRINUSE) {
1996 } while (retry <= swaitmax);
1997 if (conerrno != 0) {
1998 reply(425, "Can't build data connection: %s.",
1999 strerror(conerrno));
2002 reply(150, "Opening %s mode data connection for '%s'%s.",
2003 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
2008 * A helper macro to avoid code duplication
2009 * in send_data() and receive_data().
2011 * XXX We have to block SIGURG during putc() because BSD stdio
2012 * is unable to restart interrupted write operations and hence
2013 * the entire buffer contents will be lost as soon as a write()
2014 * call indicates EINTR to stdio.
2016 #define FTPD_PUTC(ch, file, label) \
2022 ret = putc((ch), (file)); \
2024 CHECKOOB(return (-1)) \
2025 else if (ferror(file)) \
2028 } while (ret == EOF); \
2032 * Tranfer the contents of "instr" to "outstr" peer using the appropriate
2033 * encapsulation of the data subject to Mode, Structure, and Type.
2035 * NB: Form isn't handled.
2038 send_data(FILE *instr, FILE *outstr, size_t blksize, off_t filesize, int isreg)
2040 int c, cp, filefd, netfd;
2051 CHECKOOB(return (-1))
2052 else if (c == EOF && ferror(instr))
2055 if (ferror(instr)) { /* resume after OOB */
2059 if (feof(instr)) /* EOF */
2061 syslog(LOG_ERR, "Internal: impossible condition"
2062 " on file after getc()");
2065 if (c == '\n' && cp != '\r') {
2066 FTPD_PUTC('\r', outstr, data_err);
2069 FTPD_PUTC(c, outstr, data_err);
2073 #ifdef notyet /* BSD stdio isn't ready for that */
2074 while (fflush(outstr) == EOF) {
2075 CHECKOOB(return (-1))
2083 if (fflush(outstr) == EOF)
2086 reply(226, "Transfer complete.");
2092 * isreg is only set if we are not doing restart and we
2093 * are sending a regular file
2095 netfd = fileno(outstr);
2096 filefd = fileno(instr);
2099 char *msg = "Transfer complete.";
2105 while (filesize > 0) {
2106 err = sendfile(filefd, netfd, offset, 0,
2109 * Calculate byte_count before OOB processing.
2110 * It can be used in myoob() later.
2115 CHECKOOB(return (-1))
2116 else if (err == -1) {
2117 if (errno != EINTR &&
2118 cnt == 0 && offset == 0)
2122 if (err == -1) /* resume after OOB */
2125 * We hit the EOF prematurely.
2126 * Perhaps the file was externally truncated.
2129 msg = "Transfer finished due to "
2130 "premature end of file.";
2140 if ((buf = malloc(blksize)) == NULL) {
2142 reply(451, "Ran out of memory.");
2150 cnt = read(filefd, buf, blksize);
2151 CHECKOOB(free(buf); return (-1))
2156 if (cnt < 0) /* resume after OOB */
2158 if (cnt == 0) /* EOF */
2160 for (len = cnt, bp = buf; len > 0;) {
2161 cnt = write(netfd, bp, len);
2162 CHECKOOB(free(buf); return (-1))
2176 reply(226, "Transfer complete.");
2180 reply(550, "Unimplemented TYPE %d in send_data.", type);
2186 perror_reply(426, "Data connection");
2191 perror_reply(551, "Error on input file");
2196 * Transfer data from peer to "outstr" using the appropriate encapulation of
2197 * the data subject to Mode, Structure, and Type.
2199 * N.B.: Form isn't handled.
2202 receive_data(FILE *instr, FILE *outstr)
2218 cnt = read(fileno(instr), buf, sizeof(buf));
2219 CHECKOOB(return (-1))
2222 if (cnt < 0) /* resume after OOB */
2224 if (cnt == 0) /* EOF */
2226 for (len = cnt, bp = buf; len > 0;) {
2227 cnt = write(fileno(outstr), bp, len);
2228 CHECKOOB(return (-1))
2243 reply(553, "TYPE E not implemented.");
2250 CHECKOOB(return (-1))
2251 else if (c == EOF && ferror(instr))
2253 if (c == EOF && ferror(instr)) { /* resume after OOB */
2260 FTPD_PUTC('\r', outstr, file_err);
2270 /* Check for EOF here in order not to lose last \r. */
2272 if (feof(instr)) /* EOF */
2274 syslog(LOG_ERR, "Internal: impossible condition"
2275 " on data stream after getc()");
2280 FTPD_PUTC(c, outstr, file_err);
2283 #ifdef notyet /* BSD stdio isn't ready for that */
2284 while (fflush(outstr) == EOF) {
2285 CHECKOOB(return (-1))
2293 if (fflush(outstr) == EOF)
2298 "WARNING! %d bare linefeeds received in ASCII mode.",
2300 printf(" File may not have transferred correctly.\r\n");
2305 reply(550, "Unimplemented TYPE %d in receive_data.", type);
2311 perror_reply(426, "Data connection");
2316 perror_reply(452, "Error writing to file");
2321 statfilecmd(char *filename)
2326 char line[LINE_MAX];
2329 code = lstat(filename, &st) == 0 && S_ISDIR(st.st_mode) ? 212 : 213;
2330 snprintf(line, sizeof(line), _PATH_LS " -lgA %s", filename);
2331 fin = ftpd_popen(line, "r");
2332 lreply(code, "Status of %s:", filename);
2334 while ((c = getc(fin)) != EOF) {
2336 if (ferror(stdout)){
2337 perror_reply(421, "Control connection");
2343 perror_reply(551, filename);
2350 * RFC 959 says neutral text should be prepended before
2351 * a leading 3-digit number followed by whitespace, but
2352 * many ftp clients can be confused by any leading digits,
2353 * as a matter of fact.
2355 if (atstart && isdigit(c))
2358 atstart = (c == '\n');
2361 reply(code, "End of status.");
2367 union sockunion *su;
2369 char hname[NI_MAXHOST];
2373 lreply(211, "%s FTP server status:", hostname);
2374 printf(" %s\r\n", version);
2376 lreply(211, "FTP server status:");
2377 printf(" Connected to %s", remotehost);
2378 if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
2379 hname, sizeof(hname) - 1, NULL, 0, NI_NUMERICHOST)) {
2380 hname[sizeof(hname) - 1] = 0;
2381 if (strcmp(hname, remotehost) != 0)
2382 printf(" (%s)", hname);
2387 printf(" Logged in anonymously\r\n");
2389 printf(" Logged in as %s\r\n", pw->pw_name);
2390 } else if (askpasswd)
2391 printf(" Waiting for password\r\n");
2393 printf(" Waiting for user name\r\n");
2394 printf(" TYPE: %s", typenames[type]);
2395 if (type == TYPE_A || type == TYPE_E)
2396 printf(", FORM: %s", formnames[form]);
2399 printf(" %d", CHAR_BIT);
2401 printf(" %d", bytesize); /* need definition! */
2403 printf("; STRUcture: %s; transfer MODE: %s\r\n",
2404 strunames[stru], modenames[mode]);
2406 printf(" Data connection open\r\n");
2407 else if (pdata != -1) {
2411 } else if (usedefault == 0) {
2415 #define UC(b) (((int) b) & 0xff)
2417 printf(" EPSV only mode (EPSV ALL)\r\n");
2422 if (su->su_family == AF_INET) {
2423 a = (u_char *) &su->su_sin.sin_addr;
2424 p = (u_char *) &su->su_sin.sin_port;
2425 printf(" %s (%d,%d,%d,%d,%d,%d)\r\n",
2426 ispassive ? "PASV" : "PORT",
2427 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
2428 UC(p[0]), UC(p[1]));
2435 switch (su->su_family) {
2437 a = (u_char *) &su->su_sin.sin_addr;
2438 p = (u_char *) &su->su_sin.sin_port;
2439 alen = sizeof(su->su_sin.sin_addr);
2443 a = (u_char *) &su->su_sin6.sin6_addr;
2444 p = (u_char *) &su->su_sin6.sin6_port;
2445 alen = sizeof(su->su_sin6.sin6_addr);
2453 printf(" %s (%d,%d,", ispassive ? "LPSV" : "LPRT",
2455 for (i = 0; i < alen; i++)
2456 printf("%d,", UC(a[i]));
2457 printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1]));
2466 switch (su->su_family) {
2478 union sockunion tmp;
2481 if (tmp.su_family == AF_INET6)
2482 tmp.su_sin6.sin6_scope_id = 0;
2483 if (!getnameinfo((struct sockaddr *)&tmp, tmp.su_len,
2484 hname, sizeof(hname) - 1, NULL, 0,
2486 hname[sizeof(hname) - 1] = 0;
2487 printf(" %s |%d|%s|%d|\r\n",
2488 ispassive ? "EPSV" : "EPRT",
2489 af, hname, htons(tmp.su_port));
2495 printf(" No data connection\r\n");
2496 reply(211, "End of status.");
2503 reply(451, "Error in server: %s", s);
2504 reply(221, "Closing connection due to server error.");
2510 reply(int n, const char *fmt, ...)
2521 syslog(LOG_DEBUG, "<--- %d ", n);
2523 vsyslog(LOG_DEBUG, fmt, ap);
2529 lreply(int n, const char *fmt, ...)
2540 syslog(LOG_DEBUG, "<--- %d- ", n);
2542 vsyslog(LOG_DEBUG, fmt, ap);
2551 reply(250, "%s command successful.", s);
2558 reply(502, "%s command not implemented.", s);
2567 if ((cp = strchr(cbuf,'\n')))
2569 reply(500, "%s: command not understood.", cbuf);
2577 LOGCMD("delete", name);
2578 if (lstat(name, &st) < 0) {
2579 perror_reply(550, name);
2582 if (S_ISDIR(st.st_mode)) {
2583 if (rmdir(name) < 0) {
2584 perror_reply(550, name);
2589 if (guest && noguestmod) {
2590 reply(550, "Operation not permitted.");
2593 if (unlink(name) < 0) {
2594 perror_reply(550, name);
2605 if (chdir(path) < 0)
2606 perror_reply(550, path);
2616 LOGCMD("mkdir", name);
2617 if (guest && noguestmkd)
2618 reply(550, "Operation not permitted.");
2619 else if (mkdir(name, 0777) < 0)
2620 perror_reply(550, name);
2622 if ((s = doublequote(name)) == NULL)
2623 fatalerror("Ran out of memory.");
2624 reply(257, "\"%s\" directory created.", s);
2630 removedir(char *name)
2633 LOGCMD("rmdir", name);
2634 if (rmdir(name) < 0)
2635 perror_reply(550, name);
2643 char *s, path[MAXPATHLEN + 1];
2645 if (getcwd(path, sizeof(path)) == NULL)
2646 perror_reply(550, "Get current directory");
2648 if ((s = doublequote(path)) == NULL)
2649 fatalerror("Ran out of memory.");
2650 reply(257, "\"%s\" is current directory.", s);
2656 renamefrom(char *name)
2660 if (guest && noguestmod) {
2661 reply(550, "Operation not permitted.");
2664 if (lstat(name, &st) < 0) {
2665 perror_reply(550, name);
2668 reply(350, "File exists, ready for destination name.");
2673 renamecmd(char *from, char *to)
2677 LOGCMD2("rename", from, to);
2679 if (guest && (stat(to, &st) == 0)) {
2680 reply(550, "%s: permission denied.", to);
2684 if (rename(from, to) < 0)
2685 perror_reply(550, "rename");
2691 dolog(struct sockaddr *who)
2693 char who_name[NI_MAXHOST];
2695 realhostname_sa(remotehost, sizeof(remotehost) - 1, who, who->sa_len);
2696 remotehost[sizeof(remotehost) - 1] = 0;
2697 if (getnameinfo(who, who->sa_len,
2698 who_name, sizeof(who_name) - 1, NULL, 0, NI_NUMERICHOST))
2700 who_name[sizeof(who_name) - 1] = 0;
2703 #ifdef VIRTUAL_HOSTING
2704 if (thishost != firsthost)
2705 snprintf(proctitle, sizeof(proctitle), "%s: connected (to %s)",
2706 remotehost, hostname);
2709 snprintf(proctitle, sizeof(proctitle), "%s: connected",
2711 setproctitle("%s", proctitle);
2712 #endif /* SETPROCTITLE */
2715 #ifdef VIRTUAL_HOSTING
2716 if (thishost != firsthost)
2717 syslog(LOG_INFO, "connection from %s (%s) to %s",
2718 remotehost, who_name, hostname);
2721 syslog(LOG_INFO, "connection from %s (%s)",
2722 remotehost, who_name);
2727 * Record logout in wtmp file
2728 * and exit with supplied status.
2731 dologout(int status)
2734 if (logged_in && dowtmp) {
2736 ftpd_logwtmp(ttyline, "", NULL);
2738 /* beware of flushing buffers after a SIGPIPE */
2756 syslog(LOG_ERR, "Internal: maskurg() while no transfer");
2761 sigaddset(&sset, SIGURG);
2762 sigprocmask(flag ? SIG_BLOCK : SIG_UNBLOCK, &sset, NULL);
2772 syslog(LOG_ERR, "Internal: flagxfer(1): "
2773 "transfer already under way");
2779 syslog(LOG_ERR, "Internal: flagxfer(0): "
2780 "no active transfer");
2787 * Returns 0 if OK to resume or -1 if abort requested.
2796 syslog(LOG_ERR, "Internal: myoob() while no transfer");
2800 ret = getline(cp, 7, stdin);
2802 reply(221, "You could at least say goodbye.");
2804 } else if (ret == -2) {
2805 /* Ignore truncated command. */
2809 if (strcmp(cp, "ABOR\r\n") == 0) {
2811 reply(426, "Transfer aborted. Data connection closed.");
2812 reply(226, "Abort successful.");
2815 if (strcmp(cp, "STAT\r\n") == 0) {
2817 if (file_size != -1)
2818 reply(213, "Status: %jd of %jd bytes transferred.",
2819 (intmax_t)byte_count, (intmax_t)file_size);
2821 reply(213, "Status: %jd bytes transferred.",
2822 (intmax_t)byte_count);
2828 * Note: a response of 425 is not mentioned as a possible response to
2829 * the PASV command in RFC959. However, it has been blessed as
2830 * a legitimate response by Jon Postel in a telephone conversation
2831 * with Rick Adams on 25 Jan 89.
2840 if (pdata >= 0) /* close old port if one set */
2843 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2845 perror_reply(425, "Can't open passive connection");
2849 if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
2850 syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
2855 if (ctrl_addr.su_family == AF_INET) {
2856 on = restricted_data_ports ? IP_PORTRANGE_HIGH
2857 : IP_PORTRANGE_DEFAULT;
2859 if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
2860 &on, sizeof(on)) < 0)
2864 #ifdef IPV6_PORTRANGE
2865 if (ctrl_addr.su_family == AF_INET6) {
2866 on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
2867 : IPV6_PORTRANGE_DEFAULT;
2869 if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
2870 &on, sizeof(on)) < 0)
2875 pasv_addr = ctrl_addr;
2876 pasv_addr.su_port = 0;
2877 if (bind(pdata, (struct sockaddr *)&pasv_addr, pasv_addr.su_len) < 0)
2880 seteuid(pw->pw_uid);
2882 len = sizeof(pasv_addr);
2883 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
2885 if (listen(pdata, 1) < 0)
2887 if (pasv_addr.su_family == AF_INET)
2888 a = (char *) &pasv_addr.su_sin.sin_addr;
2889 else if (pasv_addr.su_family == AF_INET6 &&
2890 IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr))
2891 a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
2895 p = (char *) &pasv_addr.su_port;
2897 #define UC(b) (((int) b) & 0xff)
2899 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
2900 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
2904 seteuid(pw->pw_uid);
2907 perror_reply(425, "Can't open passive connection");
2912 * Long Passive defined in RFC 1639.
2913 * 228 Entering Long Passive Mode
2914 * (af, hal, h1, h2, h3,..., pal, p1, p2...)
2918 long_passive(char *cmd, int pf)
2924 if (pdata >= 0) /* close old port if one set */
2927 if (pf != PF_UNSPEC) {
2928 if (ctrl_addr.su_family != pf) {
2929 switch (ctrl_addr.su_family) {
2942 * only EPRT/EPSV ready clients will understand this
2944 if (strcmp(cmd, "EPSV") == 0 && pf) {
2945 reply(522, "Network protocol mismatch, "
2948 reply(501, "Network protocol mismatch."); /*XXX*/
2954 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2956 perror_reply(425, "Can't open passive connection");
2960 if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
2961 syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
2965 pasv_addr = ctrl_addr;
2966 pasv_addr.su_port = 0;
2967 len = pasv_addr.su_len;
2970 if (ctrl_addr.su_family == AF_INET) {
2971 on = restricted_data_ports ? IP_PORTRANGE_HIGH
2972 : IP_PORTRANGE_DEFAULT;
2974 if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
2975 &on, sizeof(on)) < 0)
2979 #ifdef IPV6_PORTRANGE
2980 if (ctrl_addr.su_family == AF_INET6) {
2981 on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
2982 : IPV6_PORTRANGE_DEFAULT;
2984 if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
2985 &on, sizeof(on)) < 0)
2990 if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0)
2993 seteuid(pw->pw_uid);
2995 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
2997 if (listen(pdata, 1) < 0)
3000 #define UC(b) (((int) b) & 0xff)
3002 if (strcmp(cmd, "LPSV") == 0) {
3003 p = (char *)&pasv_addr.su_port;
3004 switch (pasv_addr.su_family) {
3006 a = (char *) &pasv_addr.su_sin.sin_addr;
3009 "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)",
3010 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
3011 2, UC(p[0]), UC(p[1]));
3014 if (IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr)) {
3015 a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
3018 a = (char *) &pasv_addr.su_sin6.sin6_addr;
3020 "Entering Long Passive Mode "
3021 "(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)",
3022 6, 16, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
3023 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]),
3024 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]),
3025 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]),
3026 2, UC(p[0]), UC(p[1]));
3029 } else if (strcmp(cmd, "EPSV") == 0) {
3030 switch (pasv_addr.su_family) {
3033 reply(229, "Entering Extended Passive Mode (|||%d|)",
3034 ntohs(pasv_addr.su_port));
3038 /* more proper error code? */
3042 seteuid(pw->pw_uid);
3045 perror_reply(425, "Can't open passive connection");
3050 * Generate unique name for file with basename "local"
3051 * and open the file in order to avoid possible races.
3052 * Try "local" first, then "local.1", "local.2" etc, up to "local.99".
3053 * Return descriptor to the file, set "name" to its name.
3055 * Generates failure reply on error.
3058 guniquefd(char *local, char **name)
3060 static char new[MAXPATHLEN];
3066 cp = strrchr(local, '/');
3069 if (stat(cp ? local : ".", &st) < 0) {
3070 perror_reply(553, cp ? local : ".");
3075 * Let not overwrite dirname with counter suffix.
3077 * In this extreme case dot won't be put in front of suffix.
3079 if (strlen(local) > sizeof(new) - 4) {
3080 reply(553, "Pathname too long.");
3085 /* -4 is for the .nn<null> we put on the end below */
3086 snprintf(new, sizeof(new) - 4, "%s", local);
3087 cp = new + strlen(new);
3089 * Don't generate dotfile unless requested explicitly.
3090 * This covers the case when basename gets truncated off
3093 if (cp > new && cp[-1] != '/')
3095 for (count = 0; count < 100; count++) {
3096 /* At count 0 try unmodified name */
3098 sprintf(cp, "%d", count);
3099 if ((fd = open(count ? new : local,
3100 O_RDWR | O_CREAT | O_EXCL, 0666)) >= 0) {
3101 *name = count ? new : local;
3104 if (errno != EEXIST) {
3105 perror_reply(553, count ? new : local);
3109 reply(452, "Unique file name cannot be created.");
3114 * Format and send reply containing system error number.
3117 perror_reply(int code, char *string)
3120 reply(code, "%s: %s.", string, strerror(errno));
3123 static char *onefile[] = {
3129 send_file_list(char *whichf)
3135 char **dirlist, *dirname;
3140 if (strpbrk(whichf, "~{[*?") != NULL) {
3141 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
3143 memset(&gl, 0, sizeof(gl));
3144 gl.gl_matchc = MAXGLOBARGS;
3145 flags |= GLOB_LIMIT;
3147 if (glob(whichf, flags, 0, &gl)) {
3148 reply(550, "No matching files found.");
3150 } else if (gl.gl_pathc == 0) {
3152 perror_reply(550, whichf);
3155 dirlist = gl.gl_pathv;
3157 onefile[0] = whichf;
3162 while ((dirname = *dirlist++)) {
3163 if (stat(dirname, &st) < 0) {
3165 * If user typed "ls -l", etc, and the client
3166 * used NLST, do what the user meant.
3168 if (dirname[0] == '-' && *dirlist == NULL &&
3170 retrieve(_PATH_LS " %s", dirname);
3172 perror_reply(550, whichf);
3176 if (S_ISREG(st.st_mode)) {
3178 dout = dataconn("file list", -1, "w");
3184 fprintf(dout, "%s%s\n", dirname,
3185 type == TYPE_A ? "\r" : "");
3189 byte_count += strlen(dirname) +
3190 (type == TYPE_A ? 2 : 1);
3191 CHECKOOB(goto abrt);
3193 } else if (!S_ISDIR(st.st_mode))
3196 if ((dirp = opendir(dirname)) == NULL)
3199 while ((dir = readdir(dirp)) != NULL) {
3200 char nbuf[MAXPATHLEN];
3202 CHECKOOB(goto abrt);
3204 if (strcmp(dir->d_name, ".") == 0)
3206 if (strcmp(dir->d_name, "..") == 0)
3209 snprintf(nbuf, sizeof(nbuf),
3210 "%s/%s", dirname, dir->d_name);
3213 * We have to do a stat to insure it's
3214 * not a directory or special file.
3216 if (simple || (stat(nbuf, &st) == 0 &&
3217 S_ISREG(st.st_mode))) {
3219 dout = dataconn("file list", -1, "w");
3225 if (nbuf[0] == '.' && nbuf[1] == '/')
3226 fprintf(dout, "%s%s\n", &nbuf[2],
3227 type == TYPE_A ? "\r" : "");
3229 fprintf(dout, "%s%s\n", nbuf,
3230 type == TYPE_A ? "\r" : "");
3234 byte_count += strlen(nbuf) +
3235 (type == TYPE_A ? 2 : 1);
3236 CHECKOOB(goto abrt);
3244 reply(550, "No files found.");
3245 else if (ferror(dout))
3246 data_err: perror_reply(550, "Data connection");
3248 reply(226, "Transfer complete.");
3266 reapchild(int signo)
3268 while (waitpid(-1, NULL, WNOHANG) > 0);
3271 #ifdef OLD_SETPROCTITLE
3273 * Clobber argv so ps will show what we're doing. (Stolen from sendmail.)
3274 * Warning, since this is usually started from inetd.conf, it often doesn't
3275 * have much of an environment or arglist to overwrite.
3278 setproctitle(const char *fmt, ...)
3286 vsnprintf(buf, sizeof(buf), fmt, ap);
3288 /* make ps print our process name */
3293 if (i > LastArgv - p - 2) {
3294 i = LastArgv - p - 2;
3299 if (ch != '\n' && ch != '\r')
3301 while (p < LastArgv)
3304 #endif /* OLD_SETPROCTITLE */
3307 appendf(char **strp, char *fmt, ...)
3313 vasprintf(&p, fmt, ap);
3316 fatalerror("Ran out of memory.");
3321 asprintf(strp, "%s%s", ostr, p);
3323 fatalerror("Ran out of memory.");
3329 logcmd(char *cmd, char *file1, char *file2, off_t cnt)
3332 char wd[MAXPATHLEN + 1];
3337 if (getcwd(wd, sizeof(wd) - 1) == NULL)
3338 strcpy(wd, strerror(errno));
3340 appendf(&msg, "%s", cmd);
3342 appendf(&msg, " %s", file1);
3344 appendf(&msg, " %s", file2);
3346 appendf(&msg, " = %jd bytes", (intmax_t)cnt);
3347 appendf(&msg, " (wd: %s", wd);
3348 if (guest || dochroot)
3349 appendf(&msg, "; chrooted");
3351 syslog(LOG_INFO, "%s", msg);
3356 logxfer(char *name, off_t size, time_t start)
3358 char buf[MAXPATHLEN + 1024];
3359 char path[MAXPATHLEN + 1];
3364 if (realpath(name, path) == NULL) {
3365 syslog(LOG_NOTICE, "realpath failed on %s: %m", path);
3368 snprintf(buf, sizeof(buf), "%.20s!%s!%s!%s!%jd!%ld\n",
3369 ctime(&now)+4, ident, remotehost,
3370 path, (intmax_t)size,
3371 (long)(now - start + (now == start)));
3372 write(statfd, buf, strlen(buf));
3377 doublequote(char *s)
3382 for (p = s, n = 0; *p; p++)
3386 if ((s2 = malloc(p - s + n + 1)) == NULL)
3389 for (p = s2; *s; s++, p++) {
3390 if ((*p = *s) == '"')
3398 /* setup server socket for specified address family */
3399 /* if af is PF_UNSPEC more than one socket may be returned */
3400 /* the returned list is dynamically allocated, so caller needs to free it */
3402 socksetup(int af, char *bindname, const char *bindport)
3404 struct addrinfo hints, *res, *r;
3405 int error, maxs, *s, *socks;
3408 memset(&hints, 0, sizeof(hints));
3409 hints.ai_flags = AI_PASSIVE;
3410 hints.ai_family = af;
3411 hints.ai_socktype = SOCK_STREAM;
3412 error = getaddrinfo(bindname, bindport, &hints, &res);
3414 syslog(LOG_ERR, "%s", gai_strerror(error));
3415 if (error == EAI_SYSTEM)
3416 syslog(LOG_ERR, "%s", strerror(errno));
3420 /* Count max number of sockets we may open */
3421 for (maxs = 0, r = res; r; r = r->ai_next, maxs++)
3423 socks = malloc((maxs + 1) * sizeof(int));
3426 syslog(LOG_ERR, "couldn't allocate memory for sockets");
3430 *socks = 0; /* num of sockets counter at start of array */
3432 for (r = res; r; r = r->ai_next) {
3433 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
3435 syslog(LOG_DEBUG, "control socket: %m");
3438 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
3439 &on, sizeof(on)) < 0)
3441 "control setsockopt (SO_REUSEADDR): %m");
3442 if (r->ai_family == AF_INET6) {
3443 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
3444 &on, sizeof(on)) < 0)
3446 "control setsockopt (IPV6_V6ONLY): %m");
3448 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
3449 syslog(LOG_DEBUG, "control bind: %m");
3461 syslog(LOG_ERR, "control socket: Couldn't bind to any socket");