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/*
* git-imap-send - drops patches into an imap Drafts folder
* derived from isync/mbsync - mailbox synchronizer
*
* Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
* Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
* Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
* Copyright (C) 2006 Mike McCormack
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#include "cache.h"

typedef struct store_conf {
char *name;
const char *path; /* should this be here? its interpretation is driver-specific */
char *map_inbox;
char *trash;
unsigned max_size; /* off_t is overkill */
unsigned trash_remote_new:1, trash_only_new:1;
} store_conf_t;

typedef struct string_list {
struct string_list *next;
char string[1];
} string_list_t;

typedef struct channel_conf {
struct channel_conf *next;
char *name;
store_conf_t *master, *slave;
char *master_name, *slave_name;
char *sync_state;
string_list_t *patterns;
int mops, sops;
unsigned max_messages; /* for slave only */
} channel_conf_t;

typedef struct group_conf {
struct group_conf *next;
char *name;
string_list_t *channels;
} group_conf_t;

/* For message->status */
#define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
#define M_DEAD (1<<1) /* expunged */
#define M_FLAGS (1<<2) /* flags fetched */

typedef struct message {
struct message *next;
/* string_list_t *keywords; */
size_t size; /* zero implies "not fetched" */
int uid;
unsigned char flags, status;
} message_t;

typedef struct store {
store_conf_t *conf; /* foreign */

/* currently open mailbox */
const char *name; /* foreign! maybe preset? */
char *path; /* own */
message_t *msgs; /* own */
int uidvalidity;
unsigned char opts; /* maybe preset? */
/* note that the following do _not_ reflect stats from msgs, but mailbox totals */
int count; /* # of messages */
int recent; /* # of recent messages - don't trust this beyond the initial read */
} store_t;

typedef struct {
char *data;
int len;
unsigned char flags;
unsigned int crlf:1;
} msg_data_t;

#define DRV_OK 0
#define DRV_MSG_BAD -1
#define DRV_BOX_BAD -2
#define DRV_STORE_BAD -3

static int Verbose, Quiet;

static void imap_info( const char *, ... );
static void imap_warn( const char *, ... );

static char *next_arg( char ** );

static void free_generic_messages( message_t * );

static int nfsnprintf( char *buf, int blen, const char *fmt, ... );


static void arc4_init( void );
static unsigned char arc4_getbyte( void );

typedef struct imap_server_conf {
char *name;
char *tunnel;
char *host;
int port;
char *user;
char *pass;
} imap_server_conf_t;

typedef struct imap_store_conf {
store_conf_t gen;
imap_server_conf_t *server;
unsigned use_namespace:1;
} imap_store_conf_t;

#define NIL (void*)0x1
#define LIST (void*)0x2

typedef struct _list {
struct _list *next, *child;
char *val;
int len;
} list_t;

typedef struct {
int fd;
} Socket_t;

typedef struct {
Socket_t sock;
int bytes;
int offset;
char buf[1024];
} buffer_t;

struct imap_cmd;

typedef struct imap {
int uidnext; /* from SELECT responses */
list_t *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
unsigned caps, rcaps; /* CAPABILITY results */
/* command queue */
int nexttag, num_in_progress, literal_pending;
struct imap_cmd *in_progress, **in_progress_append;
buffer_t buf; /* this is BIG, so put it last */
} imap_t;

typedef struct imap_store {
store_t gen;
int uidvalidity;
imap_t *imap;
const char *prefix;
unsigned /*currentnc:1,*/ trashnc:1;
} imap_store_t;

struct imap_cmd_cb {
int (*cont)( imap_store_t *ctx, struct imap_cmd *cmd, const char *prompt );
void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response);
void *ctx;
char *data;
int dlen;
int uid;
unsigned create:1, trycreate:1;
};

struct imap_cmd {
struct imap_cmd *next;
struct imap_cmd_cb cb;
char *cmd;
int tag;
};

#define CAP(cap) (imap->caps & (1 << (cap)))

enum CAPABILITY {
NOLOGIN = 0,
UIDPLUS,
LITERALPLUS,
NAMESPACE,
};

static const char *cap_list[] = {
"LOGINDISABLED",
"UIDPLUS",
"LITERAL+",
"NAMESPACE",
};

#define RESP_OK 0
#define RESP_NO 1
#define RESP_BAD 2

static int get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd );


static const char *Flags[] = {
"Draft",
"Flagged",
"Answered",
"Seen",
"Deleted",
};

static void
socket_perror( const char *func, Socket_t *sock, int ret )
{
if (ret < 0)
perror( func );
else
fprintf( stderr, "%s: unexpected EOF\n", func );
}

static int
socket_read( Socket_t *sock, char *buf, int len )
{
ssize_t n = xread( sock->fd, buf, len );
if (n <= 0) {
socket_perror( "read", sock, n );
close( sock->fd );
sock->fd = -1;
}
return n;
}

static int
socket_write( Socket_t *sock, const char *buf, int len )
{
int n = write_in_full( sock->fd, buf, len );
if (n != len) {
socket_perror( "write", sock, n );
close( sock->fd );
sock->fd = -1;
}
return n;
}

/* simple line buffering */
static int
buffer_gets( buffer_t * b, char **s )
{
int n;
int start = b->offset;

*s = b->buf + start;

for (;;) {
/* make sure we have enough data to read the \r\n sequence */
if (b->offset + 1 >= b->bytes) {
if (start) {
/* shift down used bytes */
*s = b->buf;

assert( start <= b->bytes );
n = b->bytes - start;

if (n)
memmove(b->buf, b->buf + start, n);
b->offset -= start;
b->bytes = n;
start = 0;
}

n = socket_read( &b->sock, b->buf + b->bytes,
sizeof(b->buf) - b->bytes );

if (n <= 0)
return -1;

b->bytes += n;
}

if (b->buf[b->offset] == '\r') {
assert( b->offset + 1 < b->bytes );
if (b->buf[b->offset + 1] == '\n') {
b->buf[b->offset] = 0; /* terminate the string */
b->offset += 2; /* next line */
if (Verbose)
puts( *s );
return 0;
}
}

b->offset++;
}
/* not reached */
}

static void
imap_info( const char *msg, ... )
{
va_list va;

if (!Quiet) {
va_start( va, msg );
vprintf( msg, va );
va_end( va );
fflush( stdout );
}
}

static void
imap_warn( const char *msg, ... )
{
va_list va;

if (Quiet < 2) {
va_start( va, msg );
vfprintf( stderr, msg, va );
va_end( va );
}
}

static char *
next_arg( char **s )
{
char *ret;

if (!s || !*s)
return NULL;
while (isspace( (unsigned char) **s ))
(*s)++;
if (!**s) {
*s = NULL;
return NULL;
}
if (**s == '"') {
++*s;
ret = *s;
*s = strchr( *s, '"' );
} else {
ret = *s;
while (**s && !isspace( (unsigned char) **s ))
(*s)++;
}
if (*s) {
if (**s)
*(*s)++ = 0;
if (!**s)
*s = NULL;
}
return ret;
}

static void
free_generic_messages( message_t *msgs )
{
message_t *tmsg;

for (; msgs; msgs = tmsg) {
tmsg = msgs->next;
free( msgs );
}
}

static int
nfsnprintf( char *buf, int blen, const char *fmt, ... )
{
int ret;
va_list va;

va_start( va, fmt );
if (blen <= 0 || (unsigned)(ret = vsnprintf( buf, blen, fmt, va )) >= (unsigned)blen)
die( "Fatal: buffer too small. Please report a bug.\n");
va_end( va );
return ret;
}

static struct {
unsigned char i, j, s[256];
} rs;

static void
arc4_init( void )
{
int i, fd;
unsigned char j, si, dat[128];

if ((fd = open( "/dev/urandom", O_RDONLY )) < 0 && (fd = open( "/dev/random", O_RDONLY )) < 0) {
fprintf( stderr, "Fatal: no random number source available.\n" );
exit( 3 );
}
if (read_in_full( fd, dat, 128 ) != 128) {
fprintf( stderr, "Fatal: cannot read random number source.\n" );
exit( 3 );
}
close( fd );

for (i = 0; i < 256; i++)
rs.s[i] = i;
for (i = j = 0; i < 256; i++) {
si = rs.s[i];
j += si + dat[i & 127];
rs.s[i] = rs.s[j];
rs.s[j] = si;
}
rs.i = rs.j = 0;

for (i = 0; i < 256; i++)
arc4_getbyte();
}

static unsigned char
arc4_getbyte( void )
{
unsigned char si, sj;

rs.i++;
si = rs.s[rs.i];
rs.j += si;
sj = rs.s[rs.j];
rs.s[rs.i] = sj;
rs.s[rs.j] = si;
return rs.s[(si + sj) & 0xff];
}

static struct imap_cmd *
v_issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb,
const char *fmt, va_list ap )
{
imap_t *imap = ctx->imap;
struct imap_cmd *cmd;
int n, bufl;
char buf[1024];

cmd = xmalloc( sizeof(struct imap_cmd) );
nfvasprintf( &cmd->cmd, fmt, ap );
cmd->tag = ++imap->nexttag;

if (cb)
cmd->cb = *cb;
else
memset( &cmd->cb, 0, sizeof(cmd->cb) );

while (imap->literal_pending)
get_cmd_result( ctx, NULL );

bufl = nfsnprintf( buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
"%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
cmd->tag, cmd->cmd, cmd->cb.dlen );
if (Verbose) {
if (imap->num_in_progress)
printf( "(%d in progress) ", imap->num_in_progress );
if (memcmp( cmd->cmd, "LOGIN", 5 ))
printf( ">>> %s", buf );
else
printf( ">>> %d LOGIN <user> <pass>\n", cmd->tag );
}
if (socket_write( &imap->buf.sock, buf, bufl ) != bufl) {
free( cmd->cmd );
free( cmd );
if (cb && cb->data)
free( cb->data );
return NULL;
}
if (cmd->cb.data) {
if (CAP(LITERALPLUS)) {
n = socket_write( &imap->buf.sock, cmd->cb.data, cmd->cb.dlen );
free( cmd->cb.data );
if (n != cmd->cb.dlen ||
(n = socket_write( &imap->buf.sock, "\r\n", 2 )) != 2)
{
free( cmd->cmd );
free( cmd );
return NULL;
}
cmd->cb.data = NULL;
} else
imap->literal_pending = 1;
} else if (cmd->cb.cont)
imap->literal_pending = 1;
cmd->next = NULL;
*imap->in_progress_append = cmd;
imap->in_progress_append = &cmd->next;
imap->num_in_progress++;
return cmd;
}

static struct imap_cmd *
issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
struct imap_cmd *ret;
va_list ap;

va_start( ap, fmt );
ret = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
return ret;
}

static int
imap_exec( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;

va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return RESP_BAD;

return get_cmd_result( ctx, cmdp );
}

static int
imap_exec_m( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;

va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return DRV_STORE_BAD;

switch (get_cmd_result( ctx, cmdp )) {
case RESP_BAD: return DRV_STORE_BAD;
case RESP_NO: return DRV_MSG_BAD;
default: return DRV_OK;
}
}

static int
is_atom( list_t *list )
{
return list && list->val && list->val != NIL && list->val != LIST;
}

static int
is_list( list_t *list )
{
return list && list->val == LIST;
}

static void
free_list( list_t *list )
{
list_t *tmp;

for (; list; list = tmp) {
tmp = list->next;
if (is_list( list ))
free_list( list->child );
else if (is_atom( list ))
free( list->val );
free( list );
}
}

static int
parse_imap_list_l( imap_t *imap, char **sp, list_t **curp, int level )
{
list_t *cur;
char *s = *sp, *p;
int n, bytes;

for (;;) {
while (isspace( (unsigned char)*s ))
s++;
if (level && *s == ')') {
s++;
break;
}
*curp = cur = xmalloc( sizeof(*cur) );
curp = &cur->next;
cur->val = NULL; /* for clean bail */
if (*s == '(') {
/* sublist */
s++;
cur->val = LIST;
if (parse_imap_list_l( imap, &s, &cur->child, level + 1 ))
goto bail;
} else if (imap && *s == '{') {
/* literal */
bytes = cur->len = strtol( s + 1, &s, 10 );
if (*s != '}')
goto bail;

s = cur->val = xmalloc( cur->len );

/* dump whats left over in the input buffer */
n = imap->buf.bytes - imap->buf.offset;

if (n > bytes)
/* the entire message fit in the buffer */
n = bytes;

memcpy( s, imap->buf.buf + imap->buf.offset, n );
s += n;
bytes -= n;

/* mark that we used part of the buffer */
imap->buf.offset += n;

/* now read the rest of the message */
while (bytes > 0) {
if ((n = socket_read (&imap->buf.sock, s, bytes)) <= 0)
goto bail;
s += n;
bytes -= n;
}

if (buffer_gets( &imap->buf, &s ))
goto bail;
} else if (*s == '"') {
/* quoted string */
s++;
p = s;
for (; *s != '"'; s++)
if (!*s)
goto bail;
cur->len = s - p;
s++;
cur->val = xmalloc( cur->len + 1 );
memcpy( cur->val, p, cur->len );
cur->val[cur->len] = 0;
} else {
/* atom */
p = s;
for (; *s && !isspace( (unsigned char)*s ); s++)
if (level && *s == ')')
break;
cur->len = s - p;
if (cur->len == 3 && !memcmp ("NIL", p, 3))
cur->val = NIL;
else {
cur->val = xmalloc( cur->len + 1 );
memcpy( cur->val, p, cur->len );
cur->val[cur->len] = 0;
}
}

if (!level)
break;
if (!*s)
goto bail;
}
*sp = s;
*curp = NULL;
return 0;

  bail:
*curp = NULL;
return -1;
}

static list_t *
parse_imap_list( imap_t *imap, char **sp )
{
list_t *head;

if (!parse_imap_list_l( imap, sp, &head, 0 ))
return head;
free_list( head );
return NULL;
}

static list_t *
parse_list( char **sp )
{
return parse_imap_list( NULL, sp );
}

static void
parse_capability( imap_t *imap, char *cmd )
{
char *arg;
unsigned i;

imap->caps = 0x80000000;
while ((arg = next_arg( &cmd )))
for (i = 0; i < ARRAY_SIZE(cap_list); i++)
if (!strcmp( cap_list[i], arg ))
imap->caps |= 1 << i;
imap->rcaps = imap->caps;
}

static int
parse_response_code( imap_store_t *ctx, struct imap_cmd_cb *cb, char *s )
{
imap_t *imap = ctx->imap;
char *arg, *p;

if (*s != '[')
return RESP_OK; /* no response code */
s++;
if (!(p = strchr( s, ']' ))) {
fprintf( stderr, "IMAP error: malformed response code\n" );
return RESP_BAD;
}
*p++ = 0;
arg = next_arg( &s );
if (!strcmp( "UIDVALIDITY", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed UIDVALIDITY status\n" );
return RESP_BAD;
}
} else if (!strcmp( "UIDNEXT", arg )) {
if (!(arg = next_arg( &s )) || !(imap->uidnext = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed NEXTUID status\n" );
return RESP_BAD;
}
} else if (!strcmp( "CAPABILITY", arg )) {
parse_capability( imap, s );
} else if (!strcmp( "ALERT", arg )) {
/* RFC2060 says that these messages MUST be displayed
* to the user
*/
for (; isspace( (unsigned char)*p ); p++);
fprintf( stderr, "*** IMAP ALERT *** %s\n", p );
} else if (cb && cb->ctx && !strcmp( "APPENDUID", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg )) ||
!(arg = next_arg( &s )) || !(*(int *)cb->ctx = atoi( arg )))
{
fprintf( stderr, "IMAP error: malformed APPENDUID status\n" );
return RESP_BAD;
}
}
return RESP_OK;
}

static int
get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd )
{
imap_t *imap = ctx->imap;
struct imap_cmd *cmdp, **pcmdp, *ncmdp;
char *cmd, *arg, *arg1, *p;
int n, resp, resp2, tag;

for (;;) {
if (buffer_gets( &imap->buf, &cmd ))
return RESP_BAD;

arg = next_arg( &cmd );
if (*arg == '*') {
arg = next_arg( &cmd );
if (!arg) {
fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
return RESP_BAD;
}

if (!strcmp( "NAMESPACE", arg )) {
imap->ns_personal = parse_list( &cmd );
imap->ns_other = parse_list( &cmd );
imap->ns_shared = parse_list( &cmd );
} else if (!strcmp( "OK", arg ) || !strcmp( "BAD", arg ) ||
!strcmp( "NO", arg ) || !strcmp( "BYE", arg )) {
if ((resp = parse_response_code( ctx, NULL, cmd )) != RESP_OK)
return resp;
} else if (!strcmp( "CAPABILITY", arg ))
parse_capability( imap, cmd );
else if ((arg1 = next_arg( &cmd ))) {
if (!strcmp( "EXISTS", arg1 ))
ctx->gen.count = atoi( arg );
else if (!strcmp( "RECENT", arg1 ))
ctx->gen.recent = atoi( arg );
} else {
fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
return RESP_BAD;
}
} else if (!imap->in_progress) {
fprintf( stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "" );
return RESP_BAD;
} else if (*arg == '+') {
/* This can happen only with the last command underway, as
it enforces a round-trip. */
cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
offsetof(struct imap_cmd, next));
if (cmdp->cb.data) {
n = socket_write( &imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen );
free( cmdp->cb.data );
cmdp->cb.data = NULL;
if (n != (int)cmdp->cb.dlen)
return RESP_BAD;
} else if (cmdp->cb.cont) {
if (cmdp->cb.cont( ctx, cmdp, cmd ))
return RESP_BAD;
} else {
fprintf( stderr, "IMAP error: unexpected command continuation request\n" );
return RESP_BAD;
}
if (socket_write( &imap->buf.sock, "\r\n", 2 ) != 2)
return RESP_BAD;
if (!cmdp->cb.cont)
imap->literal_pending = 0;
if (!tcmd)
return DRV_OK;
} else {
tag = atoi( arg );
for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
if (cmdp->tag == tag)
goto gottag;
fprintf( stderr, "IMAP error: unexpected tag %s\n", arg );
return RESP_BAD;
gottag:
if (!(*pcmdp = cmdp->next))
imap->in_progress_append = pcmdp;
imap->num_in_progress--;
if (cmdp->cb.cont || cmdp->cb.data)
imap->literal_pending = 0;
arg = next_arg( &cmd );
if (!strcmp( "OK", arg ))
resp = DRV_OK;
else {
if (!strcmp( "NO", arg )) {
if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp( cmd, "[TRYCREATE]", 11 ))) { /* SELECT, APPEND or UID COPY */
p = strchr( cmdp->cmd, '"' );
if (!issue_imap_cmd( ctx, NULL, "CREATE \"%.*s\"", strchr( p + 1, '"' ) - p + 1, p )) {
resp = RESP_BAD;
goto normal;
}
/* not waiting here violates the spec, but a server that does not
grok this nonetheless violates it too. */
cmdp->cb.create = 0;
if (!(ncmdp = issue_imap_cmd( ctx, &cmdp->cb, "%s", cmdp->cmd ))) {
resp = RESP_BAD;
goto normal;
}
free( cmdp->cmd );
free( cmdp );
if (!tcmd)
return 0; /* ignored */
if (cmdp == tcmd)
tcmd = ncmdp;
continue;
}
resp = RESP_NO;
} else /*if (!strcmp( "BAD", arg ))*/
resp = RESP_BAD;
fprintf( stderr, "IMAP command '%s' returned response (%s) - %s\n",
memcmp (cmdp->cmd, "LOGIN", 5) ?
cmdp->cmd : "LOGIN <user> <pass>",
arg, cmd ? cmd : "");
}
if ((resp2 = parse_response_code( ctx, &cmdp->cb, cmd )) > resp)
resp = resp2;
normal:
if (cmdp->cb.done)
cmdp->cb.done( ctx, cmdp, resp );
if (cmdp->cb.data)
free( cmdp->cb.data );
free( cmdp->cmd );
free( cmdp );
if (!tcmd || tcmd == cmdp)
return resp;
}
}
/* not reached */
}

static void
imap_close_server( imap_store_t *ictx )
{
imap_t *imap = ictx->imap;

if (imap->buf.sock.fd != -1) {
imap_exec( ictx, NULL, "LOGOUT" );
close( imap->buf.sock.fd );
}
free_list( imap->ns_personal );
free_list( imap->ns_other );
free_list( imap->ns_shared );
free( imap );
}

static void
imap_close_store( store_t *ctx )
{
imap_close_server( (imap_store_t *)ctx );
free_generic_messages( ctx->msgs );
free( ctx );
}

static store_t *
imap_open_store( imap_server_conf_t *srvc )
{
imap_store_t *ctx;
imap_t *imap;
char *arg, *rsp;
struct hostent *he;
struct sockaddr_in addr;
int s, a[2], preauth;
pid_t pid;

ctx = xcalloc( sizeof(*ctx), 1 );

ctx->imap = imap = xcalloc( sizeof(*imap), 1 );
imap->buf.sock.fd = -1;
imap->in_progress_append = &imap->in_progress;

/* open connection to IMAP server */

if (srvc->tunnel) {
imap_info( "Starting tunnel '%s'... ", srvc->tunnel );

if (socketpair( PF_UNIX, SOCK_STREAM, 0, a )) {
perror( "socketpair" );
exit( 1 );
}

pid = fork();
if (pid < 0)
_exit( 127 );
if (!pid) {
if (dup2( a[0], 0 ) == -1 || dup2( a[0], 1 ) == -1)
_exit( 127 );
close( a[0] );
close( a[1] );
execl( "/bin/sh", "sh", "-c", srvc->tunnel, NULL );
_exit( 127 );
}

close (a[0]);

imap->buf.sock.fd = a[1];

imap_info( "ok\n" );
} else {
memset( &addr, 0, sizeof(addr) );
addr.sin_port = htons( srvc->port );
addr.sin_family = AF_INET;

imap_info( "Resolving %s... ", srvc->host );
he = gethostbyname( srvc->host );
if (!he) {
perror( "gethostbyname" );
goto bail;
}
imap_info( "ok\n" );

addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);

s = socket( PF_INET, SOCK_STREAM, 0 );

imap_info( "Connecting to %s:%hu... ", inet_ntoa( addr.sin_addr ), ntohs( addr.sin_port ) );
if (connect( s, (struct sockaddr *)&addr, sizeof(addr) )) {
close( s );
perror( "connect" );
goto bail;
}
imap_info( "ok\n" );

imap->buf.sock.fd = s;

}

/* read the greeting string */
if (buffer_gets( &imap->buf, &rsp )) {
fprintf( stderr, "IMAP error: no greeting response\n" );
goto bail;
}
arg = next_arg( &rsp );
if (!arg || *arg != '*' || (arg = next_arg( &rsp )) == NULL) {
fprintf( stderr, "IMAP error: invalid greeting response\n" );
goto bail;
}
preauth = 0;
if (!strcmp( "PREAUTH", arg ))
preauth = 1;
else if (strcmp( "OK", arg ) != 0) {
fprintf( stderr, "IMAP error: unknown greeting response\n" );
goto bail;
}
parse_response_code( ctx, NULL, rsp );
if (!imap->caps && imap_exec( ctx, NULL, "CAPABILITY" ) != RESP_OK)
goto bail;

if (!preauth) {

imap_info ("Logging in...\n");
if (!srvc->user) {
fprintf( stderr, "Skipping server %s, no user\n", srvc->host );
goto bail;
}
if (!srvc->pass) {
char prompt[80];
sprintf( prompt, "Password (%s@%s): ", srvc->user, srvc->host );
arg = getpass( prompt );
if (!arg) {
perror( "getpass" );
exit( 1 );
}
if (!*arg) {
fprintf( stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host );
goto bail;
}
/*
* getpass() returns a pointer to a static buffer. make a copy
* for long term storage.
*/
srvc->pass = xstrdup( arg );
}
if (CAP(NOLOGIN)) {
fprintf( stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host );
goto bail;
}
imap_warn( "*** IMAP Warning *** Password is being sent in the clear\n" );
if (imap_exec( ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass ) != RESP_OK) {
fprintf( stderr, "IMAP error: LOGIN failed\n" );
goto bail;
}
} /* !preauth */

ctx->prefix = "";
ctx->trashnc = 1;
return (store_t *)ctx;

  bail:
imap_close_store( &ctx->gen );
return NULL;
}

static int
imap_make_flags( int flags, char *buf )
{
const char *s;
unsigned i, d;

for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
if (flags & (1 << i)) {
buf[d++] = ' ';
buf[d++] = '\\';
for (s = Flags[i]; *s; s++)
buf[d++] = *s;
}
buf[0] = '(';
buf[d++] = ')';
return d;
}

#define TUIDL 8

static int
imap_store_msg( store_t *gctx, msg_data_t *data, int *uid )
{
imap_store_t *ctx = (imap_store_t *)gctx;
imap_t *imap = ctx->imap;
struct imap_cmd_cb cb;
char *fmap, *buf;
const char *prefix, *box;
int ret, i, j, d, len, extra, nocr;
int start, sbreak = 0, ebreak = 0;
char flagstr[128], tuid[TUIDL * 2 + 1];

memset( &cb, 0, sizeof(cb) );

fmap = data->data;
len = data->len;
nocr = !data->crlf;
extra = 0, i = 0;
if (!CAP(UIDPLUS) && uid) {
nloop:
start = i;
while (i < len)
if (fmap[i++] == '\n') {
extra += nocr;
if (i - 2 + nocr == start) {
sbreak = ebreak = i - 2 + nocr;
goto mktid;
}
if (!memcmp( fmap + start, "X-TUID: ", 8 )) {
extra -= (ebreak = i) - (sbreak = start) + nocr;
goto mktid;
}
goto nloop;
}
/* invalid message */
free( fmap );
return DRV_MSG_BAD;
mktid:
for (j = 0; j < TUIDL; j++)
sprintf( tuid + j * 2, "%02x", arc4_getbyte() );
extra += 8 + TUIDL * 2 + 2;
}
if (nocr)
for (; i < len; i++)
if (fmap[i] == '\n')
extra++;

cb.dlen = len + extra;
buf = cb.data = xmalloc( cb.dlen );
i = 0;
if (!CAP(UIDPLUS) && uid) {
if (nocr) {
for (; i < sbreak; i++)
if (fmap[i] == '\n') {
*buf++ = '\r';
*buf++ = '\n';
} else
*buf++ = fmap[i];
} else {
memcpy( buf, fmap, sbreak );
buf += sbreak;
}
memcpy( buf, "X-TUID: ", 8 );
buf += 8;
memcpy( buf, tuid, TUIDL * 2 );
buf += TUIDL * 2;
*buf++ = '\r';
*buf++ = '\n';
i = ebreak;
}
if (nocr) {
for (; i < len; i++)
if (fmap[i] == '\n') {
*buf++ = '\r';
*buf++ = '\n';
} else
*buf++ = fmap[i];
} else
memcpy( buf, fmap + i, len - i );

free( fmap );

d = 0;
if (data->flags) {
d = imap_make_flags( data->flags, flagstr );
flagstr[d++] = ' ';
}
flagstr[d] = 0;

if (!uid) {
box = gctx->conf->trash;
prefix = ctx->prefix;
cb.create = 1;
if (ctx->trashnc)
imap->caps = imap->rcaps & ~(1 << LITERALPLUS);
} else {
box = gctx->name;
prefix = !strcmp( box, "INBOX" ) ? "" : ctx->prefix;
cb.create = 0;
}
cb.ctx = uid;
ret = imap_exec_m( ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr );
imap->caps = imap->rcaps;
if (ret != DRV_OK)
return ret;
if (!uid)
ctx->trashnc = 0;
else
gctx->count++;

return DRV_OK;
}

#define CHUNKSIZE 0x1000

static int
read_message( FILE *f, msg_data_t *msg )
{
int len, r;

memset( msg, 0, sizeof *msg );
len = CHUNKSIZE;
msg->data = xmalloc( len+1 );
msg->data[0] = 0;

while(!feof( f )) {
if (msg->len >= len) {
void *p;
len += CHUNKSIZE;
p = xrealloc(msg->data, len+1);
if (!p)
break;
msg->data = p;
}
r = fread( &msg->data[msg->len], 1, len - msg->len, f );
if (r <= 0)
break;
msg->len += r;
}
msg->data[msg->len] = 0;
return msg->len;
}

static int
count_messages( msg_data_t *msg )
{
int count = 0;
char *p = msg->data;

while (1) {
if (!prefixcmp(p, "From ")) {
count++;
p += 5;
}
p = strstr( p+5, "\nFrom ");
if (!p)
break;
p++;
}
return count;
}

static int
split_msg( msg_data_t *all_msgs, msg_data_t *msg, int *ofs )
{
char *p, *data;

memset( msg, 0, sizeof *msg );
if (*ofs >= all_msgs->len)
return 0;

data = &all_msgs->data[ *ofs ];
msg->len = all_msgs->len - *ofs;

if (msg->len < 5 || prefixcmp(data, "From "))
return 0;

p = strchr( data, '\n' );
if (p) {
p = &p[1];
msg->len -= p-data;
*ofs += p-data;
data = p;
}

p = strstr( data, "\nFrom " );
if (p)
msg->len = &p[1] - data;

msg->data = xmalloc( msg->len + 1 );
if (!msg->data)
return 0;

memcpy( msg->data, data, msg->len );
msg->data[ msg->len ] = 0;

*ofs += msg->len;
return 1;
}

static imap_server_conf_t server =
{
NULL, /* name */
NULL, /* tunnel */
NULL, /* host */
0, /* port */
NULL, /* user */
NULL, /* pass */
};

static char *imap_folder;

static int
git_imap_config(const char *key, const char *val)
{
char imap_key[] = "imap.";

if (strncmp( key, imap_key, sizeof imap_key - 1 ))
return 0;
key += sizeof imap_key - 1;

if (!strcmp( "folder", key )) {
imap_folder = xstrdup( val );
} else if (!strcmp( "host", key )) {
{
if (!prefixcmp(val, "imap:"))
val += 5;
if (!server.port)
server.port = 143;
}
if (!prefixcmp(val, "//"))
val += 2;
server.host = xstrdup( val );
}
else if (!strcmp( "user", key ))
server.user = xstrdup( val );
else if (!strcmp( "pass", key ))
server.pass = xstrdup( val );
else if (!strcmp( "port", key ))
server.port = git_config_int( key, val );
else if (!strcmp( "tunnel", key ))
server.tunnel = xstrdup( val );
return 0;
}

int
main(int argc, char **argv)
{
msg_data_t all_msgs, msg;
store_t *ctx = NULL;
int uid = 0;
int ofs = 0;
int r;
int total, n = 0;

/* init the random number generator */
arc4_init();

git_config( git_imap_config );

if (!imap_folder) {
fprintf( stderr, "no imap store specified\n" );
return 1;
}

/* read the messages */
if (!read_message( stdin, &all_msgs )) {
fprintf(stderr,"nothing to send\n");
return 1;
}

total = count_messages( &all_msgs );
if (!total) {
fprintf(stderr,"no messages to send\n");
return 1;
}

/* write it to the imap server */
ctx = imap_open_store( &server );
if (!ctx) {
fprintf( stderr,"failed to open store\n");
return 1;
}

fprintf( stderr, "sending %d message%s\n", total, (total!=1)?"s":"" );
ctx->name = imap_folder;
while (1) {
unsigned percent = n * 100 / total;
fprintf( stderr, "%4u%% (%d/%d) done\r", percent, n, total );
if (!split_msg( &all_msgs, &msg, &ofs ))
break;
r = imap_store_msg( ctx, &msg, &uid );
if (r != DRV_OK) break;
n++;
}
fprintf( stderr,"\n" );

imap_close_store( ctx );

return 0;
}
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