static sfsistat
blacklist_header(SMFICTX *ctx, char *headerf, char *headerv)
{
if(strcmp(headerf, "From") == 0) {
if(strstr(headerv, "System Anti-Virus Administrator") ||
(strncasecmp(headerv, "mailsweeper@", 12) == 0) ||
strstr(headerv, "amavisd-new")) {
smfi_setreply(ctx, "554", "5.7.1", "Forged bounce message not accepted - update your virus scanner");
syslog(LOG_NOTICE, "Blocked by blacklist-milter");
return SMFIS_REJECT;
}
} else if(strcmp(headerf, "Subject") == 0) {
if((strcmp(headerv, "Virus in mail from you.") == 0) ||
(strcmp(headerv, "MailMarshal has detected a Virus in your message") == 0) ||
(strcmp(headerv, "Returned due to virus") == 0) ||
(strstr(headerv, "antivirus system report") != NULL) ||
(strcmp(headerv, "Aviso: Detectado formato de ficheiros invalido.") == 0) ||
(strcmp(headerv, "Warning: E-mail viruses detected") == 0) ||
(strcmp(headerv, "Banned file: message.scr in mail from you") == 0) ||
(strcmp(headerv, "Atención: Virus detectado en e-mail") == 0) ||
(strcmp(headerv, "Banned file: \"message_user.txt .pif\" in mail from you") == 0) ||
(strncmp(headerv, " Returned due to virus", 22) == 0) ||
(strncmp(headerv, "Virus Detected by ", 18) == 0) ||
(strcmp(headerv, "Virus Blocked") == 0) ||
(strcmp(headerv, "**Virus in mail from you**") == 0) ||
(strncmp(headerv, "[avast! - INFECTED]", 19) == 0) ||
(strstr(headerv, "ANTIVIRUS Notification") != NULL) ||
(strcmp(headerv, "VIRUS IN YOUR MAIL") == 0)) {
smfi_setreply(ctx, "554", "5.7.1", "Forged bounce message not accepted - update your virus scanner");
syslog(LOG_NOTICE, "Blocked by blacklist-milter");
return SMFIS_REJECT;
}
}
return SMFIS_CONTINUE;
}
/*}}}*/
} priv_t;
static char *
xfree (char *s) /*{{{*/
{
if (s)
free (s);
return NULL;
}/*}}}*/
static bool_t
xcopy (char **buf, const char *str) /*{{{*/
{
if (*buf)
free (*buf);
*buf = str ? strdup (str) : NULL;
return (! str) || *buf ? true : false;
}/*}}}*/
static void
priv_clear (priv_t *p) /*{{{*/
{
if (p) {
p -> x_agn = 0;
p -> from = xfree (p -> from);
p -> receiver = charc_free_all (p -> receiver);
p -> prev = NULL;
p -> info = xfree (p -> info);
}
}/*}}}*/
static priv_t *
priv_free (priv_t *p) /*{{{*/
{
if (p) {
priv_clear (p);
if (p -> lg)
log_free (p -> lg);
if (p -> cfg)
cfg_free (p -> cfg);
free (p);
}
return NULL;
}/*}}}*/
static priv_t *
priv_alloc (void) /*{{{*/
{
priv_t *p;
if (p = (priv_t *) malloc (sizeof (priv_t)))
if (p -> cfg = cfg_alloc (cfgfile)) {
p -> is_local = false;
p -> x_agn = 0;
p -> from = NULL;
p -> receiver = NULL;
p -> prev = NULL;
p -> info = NULL;
if (! (p -> lg = log_alloc (NULL, program, loglevel)))
p = priv_free (p);
} else {
free (p);
p = NULL;
}
return p;
}/*}}}*/
static bool_t
priv_setfrom (priv_t *p, const char *from) /*{{{*/
{
return xcopy (& p -> from, from);
}/*}}}*/
static bool_t
priv_setto (priv_t *p, const char *to) /*{{{*/
{
charc_t *r;
if (r = charc_alloc (to)) {
if (p -> prev)
p -> prev -> next = r;
else
p -> receiver = r;
p -> prev = r;
}
return r ? true : false;
}/*}}}*/
static bool_t
priv_addinfo (priv_t *p, const char *info) /*{{{*/
{
char *temp;
if ((! p -> info) || (! p -> info[0]))
return xcopy (& p -> info, info);
if (temp = malloc (strlen (p -> info) + strlen (info) + 2)) {
sprintf (temp, "%s,%s", p -> info, info);
free (p -> info);
p -> info = temp;
return true;
}
return false;
}/*}}}*/
static bool_t
priv_addinfopair (priv_t *p, const char *var, const char *val) /*{{{*/
{
bool_t rc;
char *scratch, *ptr;
if (scratch = malloc (strlen (var) + strlen (val) + 2)) {
for (ptr = scratch; *var; *ptr++ = *var++)
;
*ptr++ = '=';
for (;*val; ++val)
*ptr++ = *val == ',' ? '_' : *val;
*ptr = '\0';
rc = priv_addinfo (p, scratch);
free (scratch);
} else
rc = false;
return rc;
}/*}}}*/
static sfsistat
handle_connect (SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr) /*{{{*/
{
priv_t *p;
if (! (p = priv_alloc ()))
return SMFIS_TEMPFAIL;
if (hostaddr -> sa_family == AF_INET) {
struct sockaddr_in *iaddr = (struct sockaddr_in *) hostaddr;
if (ntohl (iaddr -> sin_addr.s_addr) == INADDR_LOOPBACK)
p -> is_local = true;
}
# ifdef AF_INET6
else if (hostaddr -> sa_family == AF_INET6) {
struct sockaddr_in6 *i6addr = (struct sockaddr_in6 *) hostaddr;
static struct in6_addr loopback = IN6ADDR_LOOPBACK_INIT;
if (memcmp (& i6addr -> sin6_addr, & loopback, sizeof (i6addr -> sin6_addr)) == 0)
p -> is_local = true;
}
# endif /* AF_INET6 */
smfi_setpriv (ctx, p);
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat
handle_from (SMFICTX *ctx, char **argv) /*{{{*/
{
priv_t *p = (priv_t *) smfi_getpriv (ctx);
if (! p)
return SMFIS_TEMPFAIL;
priv_clear (p);
if (! priv_setfrom (p, argv[0]))
return SMFIS_TEMPFAIL;
priv_addinfopair (p, "from", argv[0]);
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat
handle_to (SMFICTX *ctx, char **argv) /*{{{*/
{
priv_t *p = (priv_t *) smfi_getpriv (ctx);
char *chk, *opt;
bool_t reject, tempfail;
if (! p)
return SMFIS_TEMPFAIL;
if (p -> is_local)
return SMFIS_CONTINUE;
if (! (chk = cfg_valid_address (p -> cfg, argv[0]))) {
log_out (p -> lg, LV_ERROR, "Unable to setup initial data for `%s'", argv[0]);
return SMFIS_TEMPFAIL;
}
if (opt = strchr (chk, ':'))
*opt++ = '\0';
reject = false;
tempfail = false;
if (! strcmp (chk, ID_REJECT))
reject = true;
else if (! strcmp (chk, ID_TEMPFAIL))
tempfail = true;
else if ((! strcmp (chk, ID_ACCEPT)) && opt)
priv_addinfo (p, opt);
priv_addinfopair (p, "to", argv[0]);
free (chk);
if (reject) {
log_out (p -> lg, LV_INFO, "Receiver `%s' is rejected", argv[0]);
smfi_setreply (ctx, (char *) "550", (char *) "5.1.1", (char *) "No such user");
return SMFIS_REJECT;
}
if (tempfail) {
log_out (p -> lg, LV_INFO, "Receiver `%s' is temp. disbaled", argv[0]);
smfi_setreply (ctx, (char *) "400", (char *) "4.0.0", (char *) "Please try again later");
return SMFIS_TEMPFAIL;
}
if (! priv_setto (p, argv[0]))
return SMFIS_TEMPFAIL;
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat action_reject_msg(SMFICTX *ctx) {
struct CLAMFI *cf;
char buf[1024];
if(!rejectfmt || !(cf = (struct CLAMFI *)smfi_getpriv(ctx)))
return SMFIS_REJECT;
snprintf(buf, sizeof(buf), rejectfmt, cf->virusname);
buf[sizeof(buf)-1] = '\0';
smfi_setreply(ctx, "550", "5.7.1", buf);
return SMFIS_REJECT;
}
int
smfi_setmlreply (SMFICTX *context,
const char *return_code, const char *extended_code, ...)
{
int result = MI_SUCCESS;
GString *string = g_string_new(NULL);
va_list var_args;
const gchar *message;
va_start(var_args, extended_code);
message = va_arg(var_args, gchar *);
while (message) {
size_t length;
length = strlen(message);
if (length > MAXREPLYLEN) {
milter_error("a line is too long: <%" G_GSIZE_FORMAT ">: "
"max: <%d>: <%s>",
length, MAXREPLYLEN, message);
result = MI_FAILURE;
} else if (strchr(message, '\r')) {
milter_error("a line should not include '\\r': <%s>", message);
result = MI_FAILURE;
}
if (result == MI_FAILURE)
break;
g_string_append(string, message);
message = va_arg(var_args, gchar *);
if (message)
g_string_append(string, "\n");
}
va_end(var_args);
if (result == MI_SUCCESS) {
if (string->len > 0)
result = smfi_setreply(context,
(char *)return_code,
(char *)extended_code,
string->str);
}
g_string_free(string, TRUE);
return result;
}
/*}}}*/
} priv_t;
static char *
xfree (char *s) /*{{{*/
{
if (s)
free (s);
return NULL;
}/*}}}*/
static bool_t
xcopy (char **buf, const char *str) /*{{{*/
{
if (*buf)
free (*buf);
*buf = str ? strdup (str) : NULL;
return (! str) || *buf ? true : false;
}/*}}}*/
static void
priv_clear (priv_t *p) /*{{{*/
{
if (p) {
p -> x_agn = 0;
p -> from = xfree (p -> from);
p -> receiver = charc_free_all (p -> receiver);
p -> prev = NULL;
p -> info = xfree (p -> info);
}
}/*}}}*/
static priv_t *
priv_free (priv_t *p) /*{{{*/
{
if (p) {
priv_clear (p);
if (p -> lg)
log_free (p -> lg);
if (p -> cfg)
cfg_free (p -> cfg);
free (p);
}
return NULL;
}/*}}}*/
static priv_t *
priv_alloc (void) /*{{{*/
{
priv_t *p;
if (p = (priv_t *) malloc (sizeof (priv_t)))
if (p -> cfg = cfg_alloc (cfgfile)) {
p -> is_local = false;
p -> x_agn = 0;
p -> from = NULL;
p -> receiver = NULL;
p -> prev = NULL;
p -> info = NULL;
if (! (p -> lg = log_alloc (NULL, program, loglevel)))
p = priv_free (p);
} else {
free (p);
p = NULL;
}
return p;
}/*}}}*/
static bool_t
priv_setfrom (priv_t *p, const char *from) /*{{{*/
{
return xcopy (& p -> from, from);
}/*}}}*/
static bool_t
priv_setto (priv_t *p, const char *to) /*{{{*/
{
charc_t *r;
if (r = charc_alloc (to)) {
if (p -> prev)
p -> prev -> next = r;
else
p -> receiver = r;
p -> prev = r;
}
return r ? true : false;
}/*}}}*/
static bool_t
priv_addinfo (priv_t *p, const char *info) /*{{{*/
{
char *temp;
if ((! p -> info) || (! p -> info[0]))
return xcopy (& p -> info, info);
if (temp = malloc (strlen (p -> info) + strlen (info) + 2)) {
sprintf (temp, "%s,%s", p -> info, info);
free (p -> info);
p -> info = temp;
return true;
}
return false;
}/*}}}*/
static bool_t
priv_addinfopair (priv_t *p, const char *var, const char *val) /*{{{*/
{
bool_t rc;
char *scratch, *ptr;
if (scratch = malloc (strlen (var) + strlen (val) + 2)) {
for (ptr = scratch; *var; *ptr++ = *var++)
;
*ptr++ = '=';
for (;*val; ++val)
*ptr++ = *val == ',' ? '_' : *val;
*ptr = '\0';
rc = priv_addinfo (p, scratch);
free (scratch);
} else
rc = false;
return rc;
}/*}}}*/
static sfsistat
handle_connect (SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr) /*{{{*/
{
priv_t *p;
if (! (p = priv_alloc ()))
return SMFIS_TEMPFAIL;
if (hostaddr -> sa_family == AF_INET) {
struct sockaddr_in *iaddr = (struct sockaddr_in *) hostaddr;
if (ntohl (iaddr -> sin_addr.s_addr) == INADDR_LOOPBACK)
p -> is_local = true;
}
# ifdef AF_INET6
else if (hostaddr -> sa_family == AF_INET6) {
struct sockaddr_in6 *i6addr = (struct sockaddr_in6 *) hostaddr;
static struct in6_addr loopback = IN6ADDR_LOOPBACK_INIT;
if (memcmp (& i6addr -> sin6_addr, & loopback, sizeof (i6addr -> sin6_addr)) == 0)
p -> is_local = true;
}
# endif /* AF_INET6 */
smfi_setpriv (ctx, p);
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat
handle_from (SMFICTX *ctx, char **argv) /*{{{*/
{
priv_t *p = (priv_t *) smfi_getpriv (ctx);
if (! p)
return SMFIS_TEMPFAIL;
priv_clear (p);
if (! priv_setfrom (p, argv[0]))
return SMFIS_TEMPFAIL;
priv_addinfopair (p, "from", argv[0]);
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat
handle_to (SMFICTX *ctx, char **argv) /*{{{*/
{
priv_t *p = (priv_t *) smfi_getpriv (ctx);
char *chk, *opt;
bool_t reject, tempfail;
if (! p)
return SMFIS_TEMPFAIL;
if (p -> is_local)
return SMFIS_CONTINUE;
if (! (chk = cfg_valid_address (p -> cfg, argv[0]))) {
log_out (p -> lg, LV_ERROR, "Unable to setup initial data for `%s'", argv[0]);
return SMFIS_TEMPFAIL;
}
if (opt = strchr (chk, ':'))
*opt++ = '\0';
reject = false;
tempfail = false;
if (! strcmp (chk, ID_REJECT))
reject = true;
else if (! strcmp (chk, ID_TEMPFAIL))
tempfail = true;
else if ((! strcmp (chk, ID_ACCEPT)) && opt)
priv_addinfo (p, opt);
priv_addinfopair (p, "to", argv[0]);
free (chk);
if (reject) {
log_out (p -> lg, LV_INFO, "Receiver `%s' is rejected", argv[0]);
smfi_setreply (ctx, (char *) "550", (char *) "5.1.1", (char *) "No such user");
return SMFIS_REJECT;
}
if (tempfail) {
log_out (p -> lg, LV_INFO, "Receiver `%s' is temp. disbaled", argv[0]);
smfi_setreply (ctx, (char *) "400", (char *) "4.0.0", (char *) "Please try again later");
return SMFIS_TEMPFAIL;
}
if (! priv_setto (p, argv[0]))
return SMFIS_TEMPFAIL;
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat
handle_header (SMFICTX *ctx, char *field, char *value) /*{{{*/
{
priv_t *p = (priv_t *) smfi_getpriv (ctx);
if (! p)
return SMFIS_TEMPFAIL;
if (p -> is_local)
return SMFIS_CONTINUE;
if (! strcasecmp (field, X_LOOP)) {
log_out (p -> lg, LV_WARNING, "Mail from `%s' has already loop marker set, rejected", p -> from);
smfi_setreply (ctx, (char *) "500", (char *) "5.4.6", (char *) "Loop detected");
return SMFIS_REJECT;
}
if (! strcasecmp (field, X_AGN))
p -> x_agn++;
return SMFIS_CONTINUE;
}/*}}}*/
static sfsistat
blacklist_body(SMFICTX *ctx, u_char *bodyp, size_t len)
{
char *string = malloc(len + 1);
int rc, i;
struct privdata *privdata;
time_t now;
struct bip *bip;
if(string == NULL)
return SMFIS_CONTINUE;
if(len == 0) { /* unlikely */
free(string);
return SMFIS_CONTINUE;
}
memcpy(string, bodyp, len);
string[len] = '\0';
if(strstr(string, "One or more viruses were detected in the message") ||
strstr(string, "This message contains malware or a virus ") ||
strstr(string, "Virus Warning Message") ||
strstr(string, "infected with the W32/Netsky.p@MM virus and was not successfully cleaned.") ||
strstr(string, " contains virus W32.Email.W.NetSky.Q. Action: Deleted") ||
strstr(string, "Our firewall determined the e-mails containing worm copies are being sent from your computer.") ||
strstr(string, "The message has been blocked because it contains a component") ||
strstr(string, "virus(es) in your email to the following recipient(s):") ||
strstr(string, "An attachment in that mail was of a file type that the Spam Firewall is set to block.") ||
strstr(string, "Mail-Header, Mail-Body and Error Description are attached") ||
strstr(string, "The following email message was blocked by MailMarshal:") ||
strstr(string, "Il sistema antivirus ha rilevato una infezione nel messaggio:-") ||
strstr(string, "The original message content contained a virus or was blocked") ||
strstr(string, "Found virus WORM_MYDOOM.M in file ") ||
strstr(string, "Alerta! Posible Virus Detectado ") ||
strstr(string, "The following email message was blocked by ") ||
strstr(string, "Unrepairable Virus Detected. Your mail has not been sent.") ||
strstr(string, "ANTIVIRUS SYSTEM FOUND VIRUSES") ||
strstr(string, "An e-mail sent by you has been blocked by our automated software") ||
strstr(string, "Please check your system for viruses") ||
strstr(string, "foi rejeitado por conter virus") ||
strstr(string, "This is a message from the MailScanner E-Mail Virus Protection Service") ||
strstr(string, "was blocked by our Spam Firewall. The email you sent with the following subject ") ||
strstr(string, "Certain attachments are not allowed for security reasons.Your message has been rejected.")) {
smfi_setreply(ctx, "554", "5.7.1", "Forged bounce message not accepted - update your virus scanner");
syslog(LOG_NOTICE, "Blocked by blacklist-milter");
rc = SMFIS_REJECT;
} else
rc = SMFIS_CONTINUE;
free(string);
privdata = smfi_getpriv(ctx);
if(privdata == NULL)
/*
* Not the first call to blacklist_body for this message
*/
return rc;
now = time((time_t *)0);
for(i = 0, bip = bips; i < NBLACKLISTED; i++, bip++)
if(strcmp(bip->ip, privdata->ip) == 0) {
if((now - bip->time) < TIMEOUT) {
/*
* Another spam in the same connection
*/
syslog(LOG_NOTICE, "Rejected message from blacklisted IP %s\n", privdata->ip);
smfi_setreply(ctx, "550", "5.7.1", "Your IP is blacklisted because you are sending spam");
thread_sleep(2); /* waste their time */
bip->time = now;
return SMFIS_REJECT;
} else
/* timeout */
bip->ip[0] = '\0';
break;
}
if(rememberIP(ctx, privdata->ip))
return rc;
free(privdata);
smfi_setpriv(ctx, NULL);
return SMFIS_TEMPFAIL;
}
/*
* Sendmail wants to establish a connection to us
*/
static sfsistat
blacklist_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
{
const char *remoteIP;
struct privdata *privdata;
time_t now;
int i;
struct bip *bip;
char ip[INET_ADDRSTRLEN]; /* IPv4 only */
if(hostname == NULL) {
syslog(LOG_ERR, "blacklist_connect: hostname is null");
return SMFIS_CONTINUE;
}
if((hostaddr == NULL) || (&(((struct sockaddr_in *)(hostaddr))->sin_addr) == NULL))
/*
* According to the sendmail API hostaddr is NULL if
* "the type is not supported in the current version". What
* the documentation doesn't say is the type of what.
*
* Possibly the input is not a TCP/IP socket e.g. stdin?
*/
return SMFIS_ACCEPT;
remoteIP = inet_ntop(AF_INET, &((struct sockaddr_in *)(hostaddr))->sin_addr, ip, sizeof(ip));
#ifdef DEBUG
printf("blacklist_milter: connection from %s\n", remoteIP);
#endif
syslog(LOG_INFO, "blacklist_milter: connection from %s", remoteIP);
if(remoteIP == NULL) {
#ifdef DEBUG
puts("blacklist_connect: remoteIP is null");
#endif
syslog(LOG_ERR, "blacklist_connect: remoteIP is null");
return SMFIS_CONTINUE;
}
if(strcmp(remoteIP, "127.0.0.1") == 0) {
/*syslog(LOG_DEBUG, "blacklist_connect: not scanning outgoing messages");*/
#ifdef DEBUG
puts("blacklist_connect: not scanning outgoing messages");
#endif
return SMFIS_ACCEPT;
}
if(isLocalAddr(inet_addr(remoteIP))) {
#ifdef DEBUG
puts("blacklist_connect: not scanning local messages");
#endif
/*syslog(LOG_DEBUG, "blacklist_connect: not scanning local messages");*/
return SMFIS_ACCEPT;
}
if(isWhiteList(remoteIP)) {
/*syslog(LOG_DEBUG, "blacklist_connect: not scanning %s", remoteIP);*/
#ifdef DEBUG
printf("blacklist_connect: not scanning %s\n", remoteIP);
#endif
return SMFIS_ACCEPT;
}
for(i = 0, bip = bips; i < NBLACKLISTED; i++, bip++)
if(strcmp(bip->ip, remoteIP) == 0) {
now = time((time_t *)0);
if((now - bip->time) < TIMEOUT) {
syslog(LOG_NOTICE, "Rejected connexion from blacklisted IP %s for %s\n", remoteIP, bip->reason);
thread_sleep(2); /* waste their time */
smfi_setreply(ctx, "550", "5.7.1", "Your IP is blacklisted because you are sending spam");
bip->time = now;
return SMFIS_REJECT;
} else
/* timeout */
bip->ip[0] = '\0';
break;
}
privdata = (struct privdata *)calloc(1, sizeof(struct privdata));
smfi_setpriv(ctx, privdata);
strcpy(privdata->ip, remoteIP);
return SMFIS_CONTINUE;
}
static sfsistat
cb_eom(SMFICTX *ctx)
{
struct context *context;
sfsistat action = SMFIS_CONTINUE;
char buf[2048];
int pos = 0, retry = 0;
if ((context = (struct context *)smfi_getpriv(ctx)) == NULL) {
msg(LOG_ERR, NULL, "cb_eom: smfi_getpriv");
return (SMFIS_ACCEPT);
}
msg(LOG_DEBUG, context, "cb_eom()");
if (context->fd < 0)
goto done;
context->symbols[0] = 0;
/* no more writing data to spamd, want to read result now */
if (shutdown(context->fd, SHUT_WR)) {
msg(LOG_ERR, context, "cb_eom: shutdown: %s", strerror(errno));
goto done;
}
if (fcntl(context->fd, F_SETFL, fcntl(context->fd, F_GETFL) |
O_NONBLOCK)) {
msg(LOG_ERR, context, "cb_eom: fcntl: %s", strerror(errno));
goto done;
}
/* try at most 6 times (10 seconds timeout each) */
while (action == SMFIS_CONTINUE && retry < 6) {
fd_set fds;
struct timeval tv;
int r, i;
char b[8192];
FD_ZERO(&fds);
FD_SET(context->fd, &fds);
tv.tv_sec = 10;
tv.tv_usec = 0;
r = select(context->fd + 1, &fds, NULL, NULL, &tv);
if (r < 0) {
if (errno != EINTR) {
msg(LOG_ERR, context, "cb_eom: select: %s",
strerror(errno));
break;
}
continue;
} else if (r == 0 || !FD_ISSET(context->fd, &fds)) {
retry++;
msg(LOG_DEBUG, context, "cb_eom: waiting for "
"spamd reply (retry %d)", retry);
continue;
}
r = read(context->fd, b, sizeof(b));
if (r < 0) {
if (errno != EINTR) {
msg(LOG_ERR, context, "cb_eom: read: %s",
strerror(errno));
break;
}
continue;
} else if (r == 0)
/* connection closed by spamd */
break;
for (i = 0; i < r; ++i)
if (b[i] == '\n' || pos == sizeof(buf) - 1) {
if (pos > 0 && buf[pos - 1] == '\r')
buf[pos - 1] = 0;
else
buf[pos] = 0;
/* sets action when done */
spamd_reply(buf, context, &action);
pos = 0;
} else
buf[pos++] = b[i];
}
if (retry == 6)
msg(LOG_ERR, context, "cb_eom: spamd connection timed out");
done:
if (context->fd >= 0) {
close(context->fd);
context->fd = -1;
}
/* either way, we don't want to continue */
if (action == SMFIS_CONTINUE)
action = (context->spam && context->score > REJECT_SPAM_LEVEL) ? SMFIS_REJECT : SMFIS_ACCEPT;
msg(action == SMFIS_REJECT ? LOG_NOTICE : LOG_INFO, context,
"%s (%s %.1f/%.1f%s%s), From: %s, To: %s, Subject: %s",
(action == SMFIS_REJECT ? "REJECT" : "ACCEPT"),
(context->spam ? "SPAM" : "ham"), context->score, context->threshold,
(context->symbols[0] ? " " : ""), context->symbols,
context->hdr_from, context->hdr_to, context->hdr_subject);
if (action == SMFIS_REJECT) {
char m[1024];
snprintf(m, sizeof(m), "Spam (score %.1f)", context->score);
if (smfi_setreply(ctx, RCODE_REJECT, XCODE_REJECT, m) !=
MI_SUCCESS)
msg(LOG_ERR, context, "smfi_setreply");
} else {
char m[1024];
int j=0;
int starcnt = (int)context->score;
const char *star = "*";
char stars[1024];
stars[0]='\0';
snprintf(m, sizeof(m), "%s, %s%.1f %s%.1f%s%s",
(context->spam ? "Yes" : "No"),"score=",
context->score, "required=",context->threshold,
(context->symbols[0] ? " " : ""), context->symbols);
if (smfi_addheader(ctx, "X-Spam-Flag", context->spam ? "YES" : "NO") != MI_SUCCESS) {
msg(LOG_ERR, context, "smfi_addheader");
}
if (smfi_addheader(ctx, "X-Spam-Status", m) != MI_SUCCESS) {
msg(LOG_ERR, context, "smfi_addheader");
}
for (j = 0; j < starcnt; j++) {
strlcat(stars, star, sizeof (stars));
}
if (smfi_addheader(ctx, "X-Spam-Level", stars) != MI_SUCCESS) {
msg(LOG_ERR, context, "smfi_addheader");
}
}
context->pos = context->hdr_from[0] = context->hdr_to[0] =
context->hdr_subject[0] = context->state = context->spam =
context->symbols[0] = 0;
context->score = context->threshold = 0.0;
return (action);
}
static sfsistat mlfi_dnslcheck(SMFICTX * ctx)
{
struct mlfiPriv *priv = GETCONTEXT(ctx);
struct listNode *blp;
uint8_t blisted;
struct listNode *wlp;
uint8_t wlisted;
size_t len;
char *msg;
uint8_t a = (priv->hostaddr & 0xff000000) >> 24;
uint8_t b = (priv->hostaddr & 0x00ff0000) >> 16;
uint8_t c = (priv->hostaddr & 0x0000ff00) >> 8;
uint8_t d = (priv->hostaddr & 0x000000ff);
switch (a) {
/* Loopback */
case 127:
priv->stamp = STAMP_SKIPPED;
return SMFIS_CONTINUE;
break;
/* RFC1910 (Private networks) */
case 10: /* Class A (10.0.0.0/8) */
priv->stamp = STAMP_SKIPPED;
return SMFIS_CONTINUE;
break;
case 172:
/* Class B (172.16.0.0/12) */
if ((b & 0xf0) == 0x10) {
priv->stamp = STAMP_SKIPPED;
return SMFIS_CONTINUE;
}
break;
case 192:
/* Class C (192.168.0.0/16) */
if (b == 168) {
priv->stamp = STAMP_SKIPPED;
return SMFIS_CONTINUE;
}
break;
default:
break;
}
/* blacklist */
blp = blacklist;
blisted = 0;
while ((blp != NULL) && (blisted == 0)) {
#ifdef DEBUG
mlog(LOG_DEBUG, "%s: Looking up %u.%u.%u.%u.%s.",
(priv->msgid != NULL)? priv->msgid : priv->connectfrom,
d, c, b, a, blp->dnsl);
#endif
if (dns_check(a, b, c, d, blp->dnsl) == DNSL_EXIST) {
mlog(LOG_INFO,
"%s: %s [%u.%u.%u.%u] is blacklisted on %s",
(priv->msgid != NULL)? priv->msgid
: priv->connectfrom, priv->connectfrom,
a, b, c, d, blp->dnsl);
blisted = 1;
} else
blp = blp->next;
}
if (blisted == 0) {
priv->stamp = STAMP_PASSED;
return SMFIS_CONTINUE;
}
/* whitelist */
wlp = whitelist;
wlisted = 0;
while ((wlp != NULL) && (wlisted == 0)) {
#ifdef DEBUG
mlog(LOG_DEBUG, "%s: Looking up %u.%u.%u.%u.%s.",
(priv->msgid != NULL)? priv->msgid : priv->connectfrom,
d, c, b, a, wlp->dnsl);
#endif
if (dns_check(a, b, c, d, wlp->dnsl) == DNSL_EXIST) {
mlog(LOG_INFO,
"%s: %s [%u.%u.%u.%u] is whitelisted on %s",
(priv->msgid != NULL)? priv->msgid
: priv->connectfrom, priv->connectfrom,
a, b, c, d, wlp->dnsl);
wlisted = 1;
} else
wlp = wlp->next;
}
if (wlisted != 0) {
priv->stamp = STAMP_WHITELISTED;
return SMFIS_CONTINUE;
}
priv->stamp = STAMP_BLACKLISTED;
if(config.drymode)
return SMFIS_CONTINUE;
/* "Client address [aaa.bbb.ccc.ddd] blocked. " + msg + "aaa.bbb.ccc.ddd"
+ '\0' */
len = 43 + strlen(blp->msg) + 15 + 1;
msg = malloc(len);
if (msg == NULL) {
mlog(LOG_ERR, "%s: %s: Memory allocation failed",
(priv->msgid != NULL)? priv->msgid : priv->connectfrom,
"mlfi_dnslcheck()");
smfi_setreply(ctx, "550", "5.7.1", blp->msg);
} else {
snprintf(msg, len,
"Client address [%u.%u.%u.%u] blocked. %s%u.%u.%u.%u",
(unsigned int) a, (unsigned int) b,
(unsigned int) c, (unsigned int) d, blp->msg,
(unsigned int) a, (unsigned int) b,
(unsigned int) c, (unsigned int) d);
smfi_setreply(ctx, "550", "5.7.1", msg);
free(msg);
msg = NULL;
}
mlfi_cleanup(ctx);
return SMFIS_REJECT;
}