#include <config.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <syslog.h>
#include <errno.h>
#include <pwd.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include "global.h"
#include "exitcodes.h"
#include "imap_err.h"
#include "xmalloc.h"
#include "lmtpengine.h"
#include "prot.h"
#include "version.h"
const int config_need_data = CONFIG_NEED_PARTITION_DATA;
extern int optind;
extern char *optarg;
static int lmtpdsock;
static int logdebug = 0;
static struct protstream *deliver_out, *deliver_in;
static const char *sockaddr;
int deliver_logfd = -1;
static int deliver_msg(char *return_path, char *authuser, int ignorequota,
char **users, int numusers, char *mailbox);
static int init_net(const char *sockaddr);
static void usage()
{
fprintf(stderr,
"421-4.3.0 usage: deliver [-C <alt_config> ] [-m mailbox]"
" [-a auth] [-r return_path] [-l] [-D]\r\n");
fprintf(stderr, "421 4.3.0 %s\n", CYRUS_VERSION);
exit(EC_USAGE);
}
void fatal(const char* s, int code)
{
static int recurse_code = 0;
if(recurse_code) exit(code);
else recurse_code = 0;
prot_printf(deliver_out,"421 4.3.0 deliver: %s\r\n", s);
prot_flush(deliver_out);
cyrus_done();
exit(code);
}
static int push(int in, int out)
{
char buf[4096];
int len;
int cnt;
int amnt = 0;
len = read(in, buf, sizeof(buf)-1);
if (len == -1) {
exit(EC_IOERR);
}
if (len == 0) {
exit(0);
}
do {
cnt = write(out, buf+amnt,len-amnt);
if (cnt == -1) exit(EC_IOERR);
amnt += cnt;
} while (amnt<len);
return 0;
}
void pipe_through(int lmtp_in, int lmtp_out, int local_in, int local_out)
{
int nfound;
int highest = 3;
fd_set read_set, rset;
fd_set write_set, wset;
FD_ZERO(&read_set);
FD_SET(lmtp_in, &read_set);
if (lmtp_in >= highest) highest = lmtp_in+1;
FD_SET(local_in, &read_set);
FD_ZERO(&write_set);
FD_SET(lmtp_out, &write_set);
if (lmtp_out >= highest) highest = lmtp_out+1;
FD_SET(local_out, &write_set);
while (1)
{
rset = read_set;
wset = write_set;
nfound = select(highest, &rset, &wset, NULL, NULL);
if (nfound < 0) {
if (errno == EINTR) continue;
exit(EC_IOERR);
}
if ((FD_ISSET(lmtp_in,&rset)) && (FD_ISSET(local_out,&wset))) {
push(lmtp_in, local_out);
}
if ((FD_ISSET(local_in,&rset)) && (FD_ISSET(lmtp_out,&wset))) {
push(local_in, lmtp_out);
} else {
usleep(1000);
}
}
}
int main(int argc, char **argv)
{
int r;
int opt;
int lmtpflag = 0;
int ignorequota = 0;
char *mailboxname = NULL;
char *authuser = NULL;
char *return_path = NULL;
char buf[1024];
char *alt_config = NULL;
while ((opt = getopt(argc, argv, "C:df:r:m:a:F:eE:lqD")) != EOF) {
switch(opt) {
case 'C':
alt_config = optarg;
break;
case 'd':
break;
case 'D':
logdebug = 1;
break;
case 'r':
case 'f':
return_path = optarg;
break;
case 'm':
if (mailboxname) {
fprintf(stderr, "deliver: multiple -m options\n");
usage();
}
if (*optarg) mailboxname = optarg;
break;
case 'a':
if (authuser) {
fprintf(stderr, "deliver: multiple -a options\n");
usage();
}
authuser = optarg;
break;
case 'F':
fprintf(stderr,"deliver: 'F' option no longer supported\n");
usage();
break;
case 'e':
break;
case 'E':
fprintf(stderr,"deliver: 'E' option no longer supported\n");
usage();
break;
case 'l':
lmtpflag = 1;
break;
case 'q':
ignorequota = 1;
break;
default:
usage();
}
}
deliver_in = prot_new(0, 0);
deliver_out = prot_new(1, 1);
prot_setflushonread(deliver_in, deliver_out);
prot_settimeout(deliver_in, 300);
cyrus_init(alt_config, "deliver", CYRUSINIT_NODB);
sockaddr = config_getstring(IMAPOPT_LMTPSOCKET);
if (!sockaddr) {
strlcpy(buf, config_dir, sizeof(buf));
strlcat(buf, "/socket/lmtp", sizeof(buf));
sockaddr = buf;
}
if (lmtpflag == 1) {
int s = init_net(sockaddr);
pipe_through(s,s,0,1);
}
if (return_path == NULL) {
uid_t me = getuid();
struct passwd *p = getpwuid(me);
return_path = p->pw_name;
}
r = deliver_msg(return_path,authuser, ignorequota,
argv+optind, argc - optind, mailboxname);
cyrus_done();
return r;
}
void just_exit(const char *msg)
{
com_err(msg, 0, error_message(errno));
fatal(msg, EC_CONFIG);
}
static int init_net(const char *unixpath)
{
struct sockaddr_un addr;
if ((lmtpdsock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
just_exit("socket failed");
}
addr.sun_family = AF_UNIX;
strlcpy(addr.sun_path, unixpath, sizeof(addr.sun_path));
if (connect(lmtpdsock, (struct sockaddr *) &addr,
sizeof(addr.sun_family) + strlen(addr.sun_path) + 1) < 0) {
just_exit("connect failed");
}
return lmtpdsock;
}
static int deliver_msg(char *return_path, char *authuser, int ignorequota,
char **users, int numusers, char *mailbox)
{
int r;
struct backend *conn;
struct lmtp_txn *txn = LMTP_TXN_ALLOC(numusers ? numusers : 1);
int j;
int ml = 0;
if (!numusers && !mailbox) {
usage();
}
conn = backend_connect(NULL, sockaddr, &protocol[PROTOCOL_LMTP], "", NULL);
if (!conn) {
just_exit("couldn't connect to lmtpd");
}
txn->from = return_path;
txn->auth = authuser;
txn->data = deliver_in;
txn->isdotstuffed = 0;
txn->tempfail_unknown_mailbox = 0;
txn->rcpt_num = numusers ? numusers : 1;
if (mailbox) ml = strlen(mailbox);
if (numusers == 0) {
const char *BB = config_getstring(IMAPOPT_POSTUSER);
txn->rcpt[0].addr = (char *) xmalloc(ml + strlen(BB) + 2);
sprintf(txn->rcpt[0].addr, "%s+%s", BB, mailbox);
txn->rcpt[0].ignorequota = ignorequota;
} else {
for (j = 0; j < numusers; j++) {
if (mailbox) {
size_t ulen;
txn->rcpt[j].addr =
(char *) xmalloc(strlen(users[j]) + ml + 2);
ulen = strcspn(users[j], "@");
sprintf(txn->rcpt[j].addr, "%.*s+%s", ulen, users[j], mailbox);
if (ulen < strlen(users[j]))
strcat(txn->rcpt[j].addr, users[j]+ulen);
} else {
txn->rcpt[j].addr = users[j];
}
txn->rcpt[j].ignorequota = ignorequota;
}
}
r = lmtp_runtxn(conn, txn);
backend_disconnect(conn, &protocol[PROTOCOL_LMTP]);
r = 0;
for (j = 0; j < txn->rcpt_num; j++) {
switch (txn->rcpt[j].result) {
case RCPT_GOOD:
break;
case RCPT_TEMPFAIL:
r = EC_TEMPFAIL;
break;
case RCPT_PERMFAIL:
printf("%s: %s\n",
txn->rcpt[j].addr, error_message(txn->rcpt[j].r));
if (r != EC_TEMPFAIL) {
r = EC_DATAERR;
}
break;
}
}
return r;
}