#if defined(STDC_HEADERS)
#include <stdlib.h>
#endif
-
+#include <errno.h>
+
#include "fetchmail.h"
#include "socket.h"
#include "i18n.h"
-#if OPIE_ENABLE
+#ifdef OPIE_ENABLE
#include <opie.h>
#endif /* OPIE_ENABLE */
-#ifndef strstr /* glibc-2.1 declares this as a macro */
-extern char *strstr(); /* needed on sysV68 R3V7.1. */
-#endif /* strstr */
-
static int last;
#ifdef SDPS_ENABLE
char *sdps_envfrom;
char *sdps_envto;
#endif /* SDPS_ENABLE */
-#if OPIE_ENABLE
+#ifdef OPIE_ENABLE
static char lastok[POPBUFSIZE+1];
#endif /* OPIE_ENABLE */
-int pop3_ok (int sock, char *argbuf)
+/* these variables are shared between the CAPA probe and the authenticator */
+#if defined(GSSAPI)
+ flag has_gssapi = FALSE;
+#endif /* defined(GSSAPI) */
+#if defined(KERBEROS_V4) || defined(KERBEROS_V5)
+ flag has_kerberos = FALSE;
+#endif /* defined(KERBEROS_V4) || defined(KERBEROS_V5) */
+ static flag has_cram = FALSE;
+#ifdef OPIE_ENABLE
+ flag has_otp = FALSE;
+#endif /* OPIE_ENABLE */
+#ifdef SSL_ENABLE
+ static flag has_ssl = FALSE;
+#endif /* SSL_ENABLE */
+
+#ifdef NTLM_ENABLE
+#include "ntlm.h"
+
+static tSmbNtlmAuthRequest request;
+static tSmbNtlmAuthChallenge challenge;
+static tSmbNtlmAuthResponse response;
+
+/*
+ * NTLM support by Grant Edwards.
+ *
+ * Handle MS-Exchange NTLM authentication method. This is the same
+ * as the NTLM auth used by Samba for SMB related services. We just
+ * encode the packets in base64 instead of sending them out via a
+ * network interface.
+ *
+ * Much source (ntlm.h, smb*.c smb*.h) was borrowed from Samba.
+ */
+
+static int do_pop3_ntlm(int sock, struct query *ctl,
+ int msn_instead /** if true, send AUTH MSN, else send AUTH NTLM */)
+{
+ char msgbuf[2048];
+ int result,len;
+
+ gen_send(sock, msn_instead ? "AUTH MSN" : "AUTH NTLM");
+
+ if ((result = gen_recv(sock, msgbuf, sizeof msgbuf)))
+ return result;
+
+ if (msgbuf[0] != '+')
+ return PS_AUTHFAIL;
+
+ buildSmbNtlmAuthRequest(&request,ctl->remotename,NULL);
+
+ if (outlevel >= O_DEBUG)
+ dumpSmbNtlmAuthRequest(stdout, &request);
+
+ memset(msgbuf,0,sizeof msgbuf);
+ to64frombits (msgbuf, (unsigned char*)&request, SmbLength(&request));
+
+ if (outlevel >= O_MONITOR)
+ report(stdout, "POP3> %s\n", msgbuf);
+
+ strcat(msgbuf,"\r\n");
+ SockWrite (sock, msgbuf, strlen (msgbuf));
+
+ if ((gen_recv(sock, msgbuf, sizeof msgbuf)))
+ return result;
+
+ len = from64tobits ((unsigned char*)&challenge, msgbuf, sizeof(msgbuf));
+
+ if (outlevel >= O_DEBUG)
+ dumpSmbNtlmAuthChallenge(stdout, &challenge);
+
+ buildSmbNtlmAuthResponse(&challenge, &response,ctl->remotename,ctl->password);
+
+ if (outlevel >= O_DEBUG)
+ dumpSmbNtlmAuthResponse(stdout, &response);
+
+ memset(msgbuf,0,sizeof msgbuf);
+ to64frombits (msgbuf, (unsigned char*)&response, SmbLength(&response));
+
+ if (outlevel >= O_MONITOR)
+ report(stdout, "POP3> %s\n", msgbuf);
+
+ strcat(msgbuf,"\r\n");
+ SockWrite (sock, msgbuf, strlen (msgbuf));
+
+ if ((result = gen_recv (sock, msgbuf, sizeof msgbuf)))
+ return result;
+
+ if (strstr (msgbuf, "OK"))
+ return PS_SUCCESS;
+ else
+ return PS_AUTHFAIL;
+}
+#endif /* NTLM */
+
+
+#define DOTLINE(s) (s[0] == '.' && (s[1]=='\r'||s[1]=='\n'||s[1]=='\0'))
+
+static int pop3_ok (int sock, char *argbuf)
/* parse command response */
{
int ok;
char *bufp;
if ((ok = gen_recv(sock, buf, sizeof(buf))) == 0)
- {
- bufp = buf;
+ { bufp = buf;
if (*bufp == '+' || *bufp == '-')
bufp++;
else
return(PS_PROTOCOL);
- while (isalpha(*bufp))
+ while (isalpha((unsigned char)*bufp))
bufp++;
if (*bufp)
if (strcmp(buf,"+OK") == 0)
{
-#if OPIE_ENABLE
+#ifdef OPIE_ENABLE
strcpy(lastok, bufp);
#endif /* OPIE_ENABLE */
ok = 0;
}
else if (strncmp(buf,"-ERR", 4) == 0)
{
- if (stage > STAGE_GETAUTH)
+ if (stage == STAGE_FETCH)
+ ok = PS_TRANSIENT;
+ else if (stage > STAGE_GETAUTH)
ok = PS_PROTOCOL;
/*
* We're checking for "lock busy", "unable to lock",
/* these are blessed by RFC 2449 */
|| strstr(bufp,"[IN-USE]")||strstr(bufp,"[LOGIN-DELAY]"))
ok = PS_LOCKBUSY;
+ else if ((strstr(bufp,"Service")
+ || strstr(bufp,"service"))
+ && (strstr(bufp,"unavailable")))
+ ok = PS_SERVBUSY;
else
ok = PS_AUTHFAIL;
- if (*bufp)
+ /*
+ * We always want to pass the user lock-busy messages, because
+ * they're red flags. Other stuff (like AUTH failures on non-
+ * RFC1734 servers) only if we're debugging.
+ */
+ if (*bufp && (ok == PS_LOCKBUSY || outlevel >= O_MONITOR))
report(stderr, "%s\n", bufp);
}
else
ok = PS_PROTOCOL;
+#if POPBUFSIZE > MSGBUFSIZE
+#error "POPBUFSIZE must not be larger than MSGBUFSIZE"
+#endif
if (argbuf != NULL)
strcpy(argbuf,bufp);
}
return(ok);
}
-int pop3_getauth(int sock, struct query *ctl, char *greeting)
+
+
+static int capa_probe(int sock)
+/* probe the capabilities of the remote server */
+{
+ int ok;
+
+#if defined(GSSAPI)
+ has_gssapi = FALSE;
+#endif /* defined(GSSAPI) */
+#if defined(KERBEROS_V4) || defined(KERBEROS_V5)
+ has_kerberos = FALSE;
+#endif /* defined(KERBEROS_V4) || defined(KERBEROS_V5) */
+ has_cram = FALSE;
+#ifdef OPIE_ENABLE
+ has_otp = FALSE;
+#endif /* OPIE_ENABLE */
+
+ ok = gen_transact(sock, "CAPA");
+ if (ok == PS_SUCCESS)
+ {
+ char buffer[64];
+
+ /* determine what authentication methods we have available */
+ while ((ok = gen_recv(sock, buffer, sizeof(buffer))) == 0)
+ {
+ if (DOTLINE(buffer))
+ break;
+#ifdef SSL_ENABLE
+ if (strstr(buffer, "STLS"))
+ has_ssl = TRUE;
+#endif /* SSL_ENABLE */
+#if defined(GSSAPI)
+ if (strstr(buffer, "GSSAPI"))
+ has_gssapi = TRUE;
+#endif /* defined(GSSAPI) */
+#if defined(KERBEROS_V4)
+ if (strstr(buffer, "KERBEROS_V4"))
+ has_kerberos = TRUE;
+#endif /* defined(KERBEROS_V4) */
+#ifdef OPIE_ENABLE
+ if (strstr(buffer, "X-OTP"))
+ has_otp = TRUE;
+#endif /* OPIE_ENABLE */
+ if (strstr(buffer, "CRAM-MD5"))
+ has_cram = TRUE;
+ }
+ }
+ return(ok);
+}
+
+static void set_peek_capable(struct query *ctl)
+{
+ /* we're peek-capable means that the use of TOP is enabled,
+ * see pop3_fetch for details - short story, we can use TOP if
+ * we have a means of reliably tracking which mail we need to
+ * refetch should the connection abort in the middle.
+ * fetchall forces RETR, as does keep without UIDL */
+ peek_capable = !ctl->fetchall && (!ctl->keep || ctl->server.uidl);
+}
+
+static int pop3_getauth(int sock, struct query *ctl, char *greeting)
/* apply for connection authorization */
{
int ok;
char *start,*end;
char *msg;
-#if OPIE_ENABLE
+#ifdef OPIE_ENABLE
char *challenge;
#endif /* OPIE_ENABLE */
+#ifdef SSL_ENABLE
+ flag did_stls = FALSE;
+#endif /* SSL_ENABLE */
+
+#if defined(GSSAPI)
+ has_gssapi = FALSE;
+#endif /* defined(GSSAPI) */
+#if defined(KERBEROS_V4) || defined(KERBEROS_V5)
+ has_kerberos = FALSE;
+#endif /* defined(KERBEROS_V4) || defined(KERBEROS_V5) */
+ has_cram = FALSE;
+#ifdef OPIE_ENABLE
+ has_otp = FALSE;
+#endif /* OPIE_ENABLE */
+#ifdef SSL_ENABLE
+ has_ssl = FALSE;
+#endif /* SSL_ENABLE */
+
+ if (ctl->server.authenticate == A_SSH) {
+ return PS_SUCCESS;
+ }
#ifdef SDPS_ENABLE
/*
ctl->server.sdps = TRUE;
#endif /* SDPS_ENABLE */
- /*
- * In theory, we ought to probe with CAPA here (RFC 2449).
- * But AFAIK this commpand is not widely implemented, and
- * we have our own tests for optional commands, and it seems
- * vanishingly unlikely that the RFC 2449 extended responses
- * [IN-USE] and [LOGIN-DELAY] will ever be accidentally spoofed.
- * So we'll not bother, and save ourselves the overhead.
- */
+#ifdef NTLM_ENABLE
+ /* MSN servers require the use of NTLM (MSN) authentication */
+ if (!strcasecmp(ctl->server.pollname, "pop3.email.msn.com") ||
+ ctl->server.authenticate == A_MSN)
+ return (do_pop3_ntlm(sock, ctl, 1) == 0) ? PS_SUCCESS : PS_AUTHFAIL;
+ if (ctl->server.authenticate == A_NTLM)
+ return (do_pop3_ntlm(sock, ctl, 0) == 0) ? PS_SUCCESS : PS_AUTHFAIL;
+#else
+ if (ctl->server.authenticate == A_NTLM || ctl->server.authenticate == A_MSN)
+ {
+ report(stderr,
+ GT_("Required NTLM capability not compiled into fetchmail\n"));
+ }
+#endif
switch (ctl->server.protocol) {
case P_POP3:
#ifdef RPA_ENABLE
+ /* XXX FIXME: AUTH probing (RFC1734) should become global */
/* CompuServe POP3 Servers as of 990730 want AUTH first for RPA */
if (strstr(ctl->remotename, "@compuserve.com"))
{
while ((ok = gen_recv(sock, buffer, sizeof(buffer))) == 0)
{
- if (buffer[0] == '.')
+ if (DOTLINE(buffer))
break;
if (strncasecmp(buffer, "rpa", 3) == 0)
has_rpa = TRUE;
return(PS_AUTHFAIL);
}
- else /* not a CompuServe account */
#endif /* RPA_ENABLE */
- ok = gen_transact(sock, "USER %s", ctl->remotename);
-#if OPIE_ENABLE
+ /*
+ * CAPA command may return a list including available
+ * authentication mechanisms. if it doesn't, no harm done, we
+ * just fall back to a plain login. Note that this code
+ * latches the server's authentication type, so that in daemon mode
+ * the CAPA check only needs to be done once at start of run.
+ *
+ * If CAPA fails, then force the authentication method to PASSORD
+ * and repoll immediately.
+ *
+ * These authentication methods are blessed by RFC1734,
+ * describing the POP3 AUTHentication command.
+ */
+ if ((ctl->server.authenticate == A_ANY) ||
+ (ctl->server.authenticate == A_GSSAPI) ||
+ (ctl->server.authenticate == A_KERBEROS_V4) ||
+ (ctl->server.authenticate == A_OTP) ||
+ (ctl->server.authenticate == A_CRAM_MD5))
+ {
+ if ((ok = capa_probe(sock)) != PS_SUCCESS)
+ /* we are in STAGE_GETAUTH! */
+ if (ok == PS_AUTHFAIL ||
+ /* Some servers directly close the socket. However, if we
+ * have already authenticated before, then a previous CAPA
+ * must have succeeded. In that case, treat this as a
+ * genuine socket error and do not change the auth method.
+ */
+ (ok == PS_SOCKET && !ctl->wehaveauthed))
+ {
+ ctl->server.authenticate = A_PASSWORD;
+ /* repoll immediately */
+ ok = PS_REPOLL;
+ break;
+ }
+ }
+
+#ifdef SSL_ENABLE
+ if (has_ssl
+ && !ctl->use_ssl
+ && (!ctl->sslproto || !strcmp(ctl->sslproto,"tls1")))
+ {
+ char *realhost;
+
+ realhost = ctl->server.via ? ctl->server.via : ctl->server.pollname;
+ ok = gen_transact(sock, "STLS");
+
+ /* We use "tls1" instead of ctl->sslproto, as we want STLS,
+ * not other SSL protocols
+ */
+ if (ok == PS_SUCCESS &&
+ SSLOpen(sock,ctl->sslcert,ctl->sslkey,"tls1",ctl->sslcertck, ctl->sslcertpath,ctl->sslfingerprint,realhost,ctl->server.pollname) == -1)
+ {
+ if (!ctl->sslproto && !ctl->wehaveauthed)
+ {
+ ctl->sslproto = xstrdup("");
+ /* repoll immediately */
+ return(PS_REPOLL);
+ }
+ report(stderr,
+ GT_("SSL connection failed.\n"));
+ return PS_SOCKET;
+ }
+ did_stls = TRUE;
+
+ /*
+ * RFC 2595 says this:
+ *
+ * "Once TLS has been started, the client MUST discard cached
+ * information about server capabilities and SHOULD re-issue the
+ * CAPABILITY command. This is necessary to protect against
+ * man-in-the-middle attacks which alter the capabilities list prior
+ * to STARTTLS. The server MAY advertise different capabilities
+ * after STARTTLS."
+ */
+ capa_probe(sock);
+ }
+#endif /* SSL_ENABLE */
+
+ /*
+ * OK, we have an authentication type now.
+ */
+#if defined(KERBEROS_V4)
+ /*
+ * Servers doing KPOP have to go through a dummy login sequence
+ * rather than doing SASL.
+ */
+ if (has_kerberos &&
+ ctl->server.service && (strcmp(ctl->server.service, KPOP_PORT)!=0)
+ && (ctl->server.authenticate == A_KERBEROS_V4
+ || ctl->server.authenticate == A_KERBEROS_V5
+ || ctl->server.authenticate == A_ANY))
+ {
+ ok = do_rfc1731(sock, "AUTH", ctl->server.truename);
+ if (ok == PS_SUCCESS || ctl->server.authenticate != A_ANY)
+ break;
+ }
+#endif /* defined(KERBEROS_V4) || defined(KERBEROS_V5) */
+
+#if defined(GSSAPI)
+ if (has_gssapi &&
+ (ctl->server.authenticate == A_GSSAPI ||
+ ctl->server.authenticate == A_ANY))
+ {
+ ok = do_gssauth(sock,"AUTH","pop",ctl->server.truename,ctl->remotename);
+ if (ok == PS_SUCCESS || ctl->server.authenticate != A_ANY)
+ break;
+ }
+#endif /* defined(GSSAPI) */
+
+#ifdef OPIE_ENABLE
+ if (has_otp &&
+ (ctl->server.authenticate == A_OTP ||
+ ctl->server.authenticate == A_ANY))
+ {
+ ok = do_otp(sock, "AUTH", ctl);
+ if (ok == PS_SUCCESS || ctl->server.authenticate != A_ANY)
+ break;
+ }
+#endif /* OPIE_ENABLE */
+
+ if (ctl->server.authenticate == A_CRAM_MD5 ||
+ (has_cram && ctl->server.authenticate == A_ANY))
+ {
+ ok = do_cram_md5(sock, "AUTH", ctl, NULL);
+ if (ok == PS_SUCCESS || ctl->server.authenticate != A_ANY)
+ break;
+ }
+
+ /* ordinary validation, no one-time password or RPA */
+ if ((ok = gen_transact(sock, "USER %s", ctl->remotename)))
+ break;
+
+#ifdef OPIE_ENABLE
/* see RFC1938: A One-Time Password System */
- if (challenge = strstr(lastok, "otp-")) {
+ if ((challenge = strstr(lastok, "otp-"))) {
char response[OPIE_RESPONSE_MAX+1];
int i;
i = opiegenerator(challenge, !strcmp(ctl->password, "opie") ? "" : ctl->password, response);
if ((i == -2) && !run.poll_interval) {
char secret[OPIE_SECRET_MAX+1];
- fprintf(stderr, _("Secret pass phrase: "));
+ fprintf(stderr, GT_("Secret pass phrase: "));
if (opiereadpass(secret, sizeof(secret), 0))
i = opiegenerator(challenge, secret, response);
memset(secret, 0, sizeof(secret));
}
#endif /* OPIE_ENABLE */
- /* ordinary validation, no one-time password or RPA */
+ strlcpy(shroud, ctl->password, sizeof(shroud));
ok = gen_transact(sock, "PASS %s", ctl->password);
+ shroud[0] = '\0';
+#ifdef SSL_ENABLE
+ /* this is for servers which claim to support TLS, but actually
+ * don't! */
+ if (did_stls && ok == PS_SOCKET && !ctl->sslproto && !ctl->wehaveauthed)
+ {
+ ctl->sslproto = xstrdup("");
+ /* repoll immediately */
+ ok = PS_REPOLL;
+ }
+#endif
break;
case P_APOP:
continue;
if (*start == 0) {
report(stderr,
- _("Required APOP timestamp not found in greeting\n"));
+ GT_("Required APOP timestamp not found in greeting\n"));
return(PS_AUTHFAIL);
}
continue;
if (*end == 0 || end == start + 1) {
report(stderr,
- _("Timestamp syntax error in greeting\n"));
+ GT_("Timestamp syntax error in greeting\n"));
return(PS_AUTHFAIL);
}
else
*++end = '\0';
/* copy timestamp and password into digestion buffer */
- xalloca(msg, char *, (end-start+1) + strlen(ctl->password) + 1);
+ msg = xmalloc((end-start+1) + strlen(ctl->password) + 1);
strcpy(msg,start);
strcat(msg,ctl->password);
-
strcpy(ctl->digest, MD5Digest((unsigned char *)msg));
+ free(msg);
ok = gen_transact(sock, "APOP %s %s", ctl->remotename, ctl->digest);
break;
break;
default:
- report(stderr, _("Undefined protocol request in POP3_auth\n"));
+ report(stderr, GT_("Undefined protocol request in POP3_auth\n"));
ok = PS_ERROR;
}
{
/* maybe we detected a lock-busy condition? */
if (ok == PS_LOCKBUSY)
- report(stderr, _("lock busy! Is another session active?\n"));
+ report(stderr, GT_("lock busy! Is another session active?\n"));
return(ok);
}
+/* Disable the sleep. Based on patch by Brian Candler 2004-04-19/2004-11-08,
+ * accepted by Matthias Andree.
+ *
+ * Rationale: the server must have locked the spool before returning +OK;
+ * this sleep just wastes time and hence, for modem and GSM CSD users, money. */
+#ifdef WANT_BOGUS
/*
* Empirical experience shows some server/OS combinations
* may need a brief pause even after any lockfiles on the
* this is only ever an issue with extremely large mailboxes.
*/
sleep(3); /* to be _really_ safe, probably need sleep(5)! */
+#endif
- /* we're peek-capable if use of TOP is enabled */
- peek_capable = !(ctl->fetchall || ctl->keep);
+ set_peek_capable(ctl);
/* we're approved */
return(PS_SUCCESS);
}
-static int
-pop3_gettopid( int sock, int num , char *id)
+/* cut off C string at first POSIX space */
+static void trim(char *s) {
+ s += strcspn(s, POSIX_space);
+ s[0] = '\0';
+}
+
+static int pop3_gettopid(int sock, int num , char *id, size_t idsize)
{
int ok;
int got_it;
char buf [POPBUFSIZE+1];
- sprintf( buf, "TOP %d 1", num );
- if( (ok = gen_transact(sock, buf ) ) != 0 )
- return ok;
+ snprintf(buf, sizeof(buf), "TOP %d 1", num);
+ if ((ok = gen_transact(sock, buf )) != 0)
+ return ok;
got_it = 0;
- while((ok = gen_recv(sock, buf, sizeof(buf))) == 0) {
- if( buf[0] == '.' )
+ while ((ok = gen_recv(sock, buf, sizeof(buf))) == 0)
+ {
+ if (DOTLINE(buf))
break;
- if( ! got_it && ! strncasecmp("Message-Id:", buf, 11 )) {
+ if (!got_it && 0 == strncasecmp("Message-Id:", buf, 11)) {
+ char *p = buf + 11;
got_it = 1;
- /* prevent stack overflows */
- buf[IDLEN+12] = 0;
- sscanf( buf+12, "%s", id);
+ p += strspn(p, POSIX_space);
+ strlcpy(id, p, idsize);
+ trim(id);
}
}
return 0;
}
-static int
-pop3_slowuidl( int sock, struct query *ctl, int *countp, int *newp)
+/** Parse the UID response (leading +OK must have been
+ * stripped off) in buf, store the number in gotnum, and store the ID
+ * into the caller-provided buffer "id" of size "idsize".
+ * Returns PS_SUCCESS or PS_PROTOCOL for failure. */
+static int parseuid(const char *buf, unsigned long *gotnum, char *id, size_t idsize)
+{
+ const char *i;
+ char *j;
+
+ /* skip leading blanks ourselves */
+ i = buf;
+ i += strspn(i, POSIX_space);
+ errno = 0;
+ *gotnum = strtoul(i, &j, 10);
+ if (j == i || !*j || errno || NULL == strchr(POSIX_space, *j)) {
+ report(stderr, GT_("Cannot handle UIDL response from upstream server.\n"));
+ return PS_PROTOCOL;
+ }
+ j += strspn(j, POSIX_space);
+ strlcpy(id, j, idsize);
+ trim(id);
+ return PS_SUCCESS;
+}
+
+/** request UIDL for single message \a num and stuff the result into the
+ * buffer \a id which can hold \a idsize bytes */
+static int pop3_getuidl(int sock, int num, char *id /** output */, size_t idsize)
+{
+ int ok;
+ char buf [POPBUFSIZE+1];
+ unsigned long gotnum;
+
+ gen_send(sock, "UIDL %d", num);
+ if ((ok = pop3_ok(sock, buf)) != 0)
+ return(ok);
+ if ((ok = parseuid(buf, &gotnum, id, idsize)))
+ return ok;
+ if (gotnum != num) {
+ report(stderr, GT_("Server responded with UID for wrong message.\n"));
+ return PS_PROTOCOL;
+ }
+ return(PS_SUCCESS);
+}
+
+static int pop3_fastuidl( int sock, struct query *ctl, unsigned int count, int *newp)
+{
+ int ok;
+ unsigned int first_nr, last_nr, try_nr;
+ char id [IDLEN+1];
+
+ first_nr = 0;
+ last_nr = count + 1;
+ while (first_nr < last_nr - 1)
+ {
+ struct idlist *new;
+
+ try_nr = (first_nr + last_nr) / 2;
+ if ((ok = pop3_getuidl(sock, try_nr, id, sizeof(id))) != 0)
+ return ok;
+ if ((new = str_in_list(&ctl->oldsaved, id, FALSE)))
+ {
+ flag mark = new->val.status.mark;
+ if (mark == UID_DELETED || mark == UID_EXPUNGED)
+ {
+ if (outlevel >= O_VERBOSE)
+ report(stderr, GT_("id=%s (num=%d) was deleted, but is still present!\n"), id, try_nr);
+ /* just mark it as seen now! */
+ new->val.status.mark = mark = UID_SEEN;
+ }
+
+ /* narrow the search region! */
+ if (mark == UID_UNSEEN)
+ {
+ if (outlevel >= O_DEBUG)
+ report(stdout, GT_("%u is unseen\n"), try_nr);
+ last_nr = try_nr;
+ }
+ else
+ first_nr = try_nr;
+
+ /* save the number */
+ new->val.status.num = try_nr;
+ }
+ else
+ {
+ if (outlevel >= O_DEBUG)
+ report(stdout, GT_("%u is unseen\n"), try_nr);
+ last_nr = try_nr;
+
+ /* save it */
+ new = save_str(&ctl->oldsaved, id, UID_UNSEEN);
+ new->val.status.num = try_nr;
+ }
+ }
+ if (outlevel >= O_DEBUG && last_nr <= count)
+ report(stdout, GT_("%u is first unseen\n"), last_nr);
+
+ /* update last! */
+ *newp = count - first_nr;
+ last = first_nr;
+ return 0;
+}
+
+static int pop3_slowuidl( int sock, struct query *ctl, int *countp, int *newp)
{
/* This approach tries to get the message headers from the
* remote hosts and compares the message-id to the already known
int first_nr, list_len, try_id, try_nr, add_id;
int num;
char id [IDLEN+1];
-
- if( (ok = pop3_gettopid( sock, 1, id )) != 0 )
+
+ if ((ok = pop3_gettopid(sock, 1, id, sizeof(id))) != 0)
return ok;
-
+
if( ( first_nr = str_nr_in_list(&ctl->oldsaved, id) ) == -1 ) {
/* the first message is unknown -> all messages are new */
*newp = *countp;
try_id = list_len - first_nr; /* -1 + 1 */
if( try_id > 1 ) {
if( try_id <= *countp ) {
- if( (ok = pop3_gettopid( sock, try_id, id )) != 0 )
+ if ((ok = pop3_gettopid(sock, try_id, id, sizeof(id))) != 0)
return ok;
try_nr = str_nr_last_in_list(&ctl->oldsaved, id);
} else
try_id += add_id;
- if( (ok = pop3_gettopid( sock, try_id, id )) != 0 )
+ if ((ok = pop3_gettopid(sock, try_id, id, sizeof(id))) != 0)
return ok;
try_nr = str_nr_in_list(&ctl->oldsaved, id);
}
}
} else {
report(stderr,
- _("Messages inserted into list on server. Cannot handle this.\n"));
+ GT_("Messages inserted into list on server. Cannot handle this.\n"));
return -1;
}
}
/*
* Newer, RFC-1725-conformant POP servers may not have the LAST command.
- * We work as hard as possible to hide this ugliness, but it makes
+ * We work as hard as possible to hide this ugliness, but it makes
* counting new messages intrinsically quadratic in the worst case.
*/
last = 0;
*newp = -1;
if (*countp > 0 && !ctl->fetchall)
{
+ int fastuidl;
char id [IDLEN+1];
+ /* should we do fast uidl this time? */
+ fastuidl = ctl->fastuidl;
+ if (*countp > 7 && /* linear search is better if there are few mails! */
+ !ctl->flush && /* with flush, it is safer to disable fastuidl */
+ NUM_NONZERO (fastuidl))
+ {
+ if (fastuidl == 1)
+ dofastuidl = 1;
+ else
+ dofastuidl = ctl->fastuidlcount != 0;
+ }
+ else
+ dofastuidl = 0;
+
if (!ctl->server.uidl) {
gen_send(sock, "LAST");
ok = pop3_ok(sock, buf);
{
if (sscanf(buf, "%d", &last) == 0)
{
- report(stderr, _("protocol error\n"));
+ report(stderr, GT_("protocol error\n"));
return(PS_ERROR);
}
*newp = (*countp - last);
}
- else
- {
+ else
+ {
+ if (dofastuidl)
+ return(pop3_fastuidl( sock, ctl, *countp, newp));
/* grab the mailbox's UID list */
if ((ok = gen_transact(sock, "UIDL")) != 0)
{
/* don't worry, yet! do it the slow way */
- if((ok = pop3_slowuidl( sock, ctl, countp, newp))!=0)
+ if ((ok = pop3_slowuidl(sock, ctl, countp, newp)))
{
- report(stderr, _("protocol error while fetching UIDLs\n"));
+ report(stderr, GT_("protocol error while fetching UIDLs\n"));
return(PS_ERROR);
}
}
else
{
- int num;
+ unsigned long unum;
*newp = 0;
- while ((ok = gen_recv(sock, buf, sizeof(buf))) == 0)
+ while ((ok = gen_recv(sock, buf, sizeof(buf))) == PS_SUCCESS)
{
- if (buf[0] == '.')
- break;
- else if (sscanf(buf, "%d %s", &num, id) == 2)
+ if (DOTLINE(buf))
+ break;
+
+ if (parseuid(buf, &unum, id, sizeof(id)) == PS_SUCCESS)
{
- struct idlist *new;
+ struct idlist *old, *new;
new = save_str(&ctl->newsaved, id, UID_UNSEEN);
- new->val.status.num = num;
-
- if (str_in_list(&ctl->oldsaved, id, FALSE)) {
- new->val.status.mark = UID_SEEN;
- str_set_mark(&ctl->oldsaved, id, UID_SEEN);
+ new->val.status.num = unum;
+
+ if ((old = str_in_list(&ctl->oldsaved, id, FALSE)))
+ {
+ flag mark = old->val.status.mark;
+ if (mark == UID_DELETED || mark == UID_EXPUNGED)
+ {
+ /* XXX FIXME: switch 3 occurrences from
+ * (int)unum or (unsigned int)unum to
+ * remove the cast and use %lu - not now
+ * though, time for new release */
+ if (outlevel >= O_VERBOSE)
+ report(stderr, GT_("id=%s (num=%d) was deleted, but is still present!\n"), id, (int)unum);
+ /* just mark it as seen now! */
+ old->val.status.mark = mark = UID_SEEN;
+ }
+ new->val.status.mark = mark;
+ if (mark == UID_UNSEEN)
+ {
+ (*newp)++;
+ if (outlevel >= O_DEBUG)
+ report(stdout, GT_("%u is unseen\n"), (unsigned int)unum);
+ }
}
else
+ {
(*newp)++;
- }
- }
- }
- }
+ if (outlevel >= O_DEBUG)
+ report(stdout, GT_("%u is unseen\n"), (unsigned int)unum);
+ /* add it to oldsaved also! In case, we do not
+ * swap the lists (say, due to socket error),
+ * the same mail will not be downloaded again.
+ */
+ old = save_str(&ctl->oldsaved, id, UID_UNSEEN);
+ old->val.status.num = unum;
+ }
+ } else
+ return PS_ERROR;
+ }
+ }
+ }
}
return(PS_SUCCESS);
}
+static int pop3_getpartialsizes(int sock, int first, int last, int *sizes)
+/* capture the size of message #first */
+{
+ int ok = 0, i;
+ char buf [POPBUFSIZE+1];
+ unsigned int num, size;
+
+ for (i = first; i <= last; i++) {
+ gen_send(sock, "LIST %d", i);
+ if ((ok = pop3_ok(sock, buf)) != 0)
+ return(ok);
+ if (sscanf(buf, "%u %u", &num, &size) == 2) {
+ if (num == i)
+ sizes[i - first] = size;
+ else
+ /* warn about possible attempt to induce buffer overrun
+ *
+ * we expect server reply message number and requested
+ * message number to match */
+ report(stderr, "Warning: ignoring bogus data for message sizes returned by server.\n");
+ }
+ }
+ return(ok);
+}
+
static int pop3_getsizes(int sock, int count, int *sizes)
/* capture the sizes of all messages */
{
while ((ok = gen_recv(sock, buf, sizeof(buf))) == 0)
{
- int num, size;
+ unsigned int num, size;
- if (buf[0] == '.')
+ if (DOTLINE(buf))
break;
- else if (sscanf(buf, "%d %d", &num, &size) == 2)
- sizes[num - 1] = size;
+ else if (sscanf(buf, "%u %u", &num, &size) == 2) {
+ if (num > 0 && num <= count)
+ sizes[num - 1] = size;
+ else
+ /* warn about possible attempt to induce buffer overrun */
+ report(stderr, "Warning: ignoring bogus data for message sizes returned by server.\n");
+ }
}
return(ok);
static int pop3_is_old(int sock, struct query *ctl, int num)
/* is the given message old? */
{
+ struct idlist *new;
if (!ctl->oldsaved)
return (num <= last);
+ else if (dofastuidl)
+ {
+ char id [IDLEN+1];
+
+ if (num <= last)
+ return(TRUE);
+
+ /* in fast uidl, we manipulate the old list only! */
+
+ if ((new = id_find(&ctl->oldsaved, num)))
+ {
+ /* we already have the id! */
+ return(new->val.status.mark != UID_UNSEEN);
+ }
+
+ /* get the uidl first! */
+ if (pop3_getuidl(sock, num, id, sizeof(id)) != PS_SUCCESS)
+ return(TRUE);
+
+ if ((new = str_in_list(&ctl->oldsaved, id, FALSE))) {
+ /* we already have the id! */
+ new->val.status.num = num;
+ return(new->val.status.mark != UID_UNSEEN);
+ }
+
+ /* save it */
+ new = save_str(&ctl->oldsaved, id, UID_UNSEEN);
+ new->val.status.num = num;
+ return(FALSE);
+ }
else
- return (str_in_list(&ctl->oldsaved,
- str_find(&ctl->newsaved, num), FALSE));
+ return ((new = id_find(&ctl->newsaved, num)) != NULL &&
+ new->val.status.mark != UID_UNSEEN);
}
#ifdef UNUSED
* In that case, marking the seen flag is the only way to prevent the
* message from being re-fetched on subsequent runs.
*
- * Also use RETR if fetchall is on. This gives us a workaround
- * for servers like usa.net's that bungle TOP. It's pretty
- * harmless because fetchall guarantees that any message dropped
- * by an interrupted RETR will be picked up on the next poll of the
- * site.
+ * Also use RETR (that means no TOP, no peek) if fetchall is on.
+ * This gives us a workaround for servers like usa.net's that bungle
+ * TOP. It's pretty harmless because fetchall guarantees that any
+ * message dropped by an interrupted RETR will be picked up on the
+ * next poll of the site.
*
* We take advantage here of the fact that, according to all the
* POP RFCs, "if the number of lines requested by the POP3 client
* The line count passed (99999999) is the maximum value CompuServe will
* accept; it's much lower than the natural value 2147483646 (the maximum
* twos-complement signed 32-bit integer minus 1) */
- if (ctl->keep || ctl->fetchall)
+ if (!peek_capable)
gen_send(sock, "RETR %d", number);
else
gen_send(sock, "TOP %d 99999999", number);
return(PS_SUCCESS);
}
+static void mark_uid_seen(struct query *ctl, int number)
+/* Tell the UID code we've seen this. */
+{
+ struct idlist *sdp;
+
+ if ((sdp = id_find(&ctl->newsaved, number)))
+ sdp->val.status.mark = UID_SEEN;
+ /* mark it as seen in oldsaved also! In case, we do not swap the lists
+ * (say, due to socket error), the same mail will not be downloaded
+ * again.
+ */
+ if ((sdp = id_find(&ctl->oldsaved, number)))
+ sdp->val.status.mark = UID_SEEN;
+}
+
static int pop3_delete(int sock, struct query *ctl, int number)
/* delete a given message */
{
+ int ok;
+ mark_uid_seen(ctl, number);
/* actually, mark for deletion -- doesn't happen until QUIT time */
- return(gen_transact(sock, "DELE %d", number));
+ ok = gen_transact(sock, "DELE %d", number);
+ if (ok != PS_SUCCESS)
+ return(ok);
+ delete_str(dofastuidl ? &ctl->oldsaved : &ctl->newsaved, number);
+ return(PS_SUCCESS);
+}
+
+static int pop3_mark_seen(int sock, struct query *ctl, int number)
+/* mark a given message as seen */
+{
+ mark_uid_seen(ctl, number);
+ return(PS_SUCCESS);
}
static int pop3_logout(int sock, struct query *ctl)
{
int ok;
+#ifdef __UNUSED__
+ /*
+ * We used to do this in case the server marks messages deleted when seen.
+ * (Yes, this has been reported, in the MercuryP/NLM server.
+ * It's even legal under RFC 1939 (section 8) as a site policy.)
+ * It interacted badly with UIDL, though. Thomas Zajic wrote:
+ * "Running 'fetchmail -F -v' and checking the logs, I found out
+ * that fetchmail did in fact flush my mailbox properly, but sent
+ * a RSET just before sending QUIT to log off. This caused the
+ * POP3 server to undo/forget about the previous DELEs, resetting
+ * my mailbox to its original (ie. unflushed) state. The
+ * ~/.fetchids file did get flushed though, so the next time
+ * fetchmail was run it saw all the old messages as new ones ..."
+ */
+ if (ctl->keep)
+ gen_transact(sock, "RSET");
+#endif /* __UNUSED__ */
+
ok = gen_transact(sock, "QUIT");
if (!ok)
expunge_uids(ctl);
return(ok);
}
-const static struct method pop3 =
+static const struct method pop3 =
{
"POP3", /* Post Office Protocol v3 */
-#if INET6_ENABLE
"pop3", /* standard POP3 port */
"pop3s", /* ssl POP3 port */
-#else /* INET6_ENABLE */
- 110, /* standard POP3 port */
- 995, /* ssl POP3 port */
-#endif /* INET6_ENABLE */
FALSE, /* this is not a tagged protocol */
TRUE, /* this uses a message delimiter */
pop3_ok, /* parse command response */
- NULL, /* no password canonicalization */
pop3_getauth, /* get authorization */
pop3_getrange, /* query range of messages */
pop3_getsizes, /* we can get a list of sizes */
+ pop3_getpartialsizes, /* we can get the size of 1 mail */
pop3_is_old, /* how do we tell a message is old? */
pop3_fetch, /* request given message */
NULL, /* no way to fetch body alone */
NULL, /* no message trailer */
pop3_delete, /* how to delete a message */
+ pop3_mark_seen, /* how to mark a message as seen */
+ NULL, /* no action at end of mailbox */
pop3_logout, /* log out, we're done */
FALSE, /* no, we can't re-poll */
};
{
#ifndef MBOX
if (ctl->mailboxes->id) {
- fprintf(stderr,_("Option --remote is not supported with POP3\n"));
+ fprintf(stderr,GT_("Option --remote is not supported with POP3\n"));
return(PS_SYNTAX);
}
#endif /* MBOX */
- peek_capable = !ctl->fetchall;
+ set_peek_capable(ctl); /* XXX FIXME: is this needed or do we always
+ call this from pop3_getauth anyways? */
return(do_protocol(ctl, &pop3));
}
#endif /* POP3_ENABLE */