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imap-send.c
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imap-send.c
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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"
#include <assert.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.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 char 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 info( const char *, ... );
static void warn( const char *, ... );
static char *next_arg( char ** );
static void free_generic_messages( message_t * );
static int nfvasprintf( char **str, const char *fmt, va_list va );
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 )
{
int n = read( 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, char *buf, int len )
{
int n = write( 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)
memcpy( 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
info( const char *msg, ... )
{
va_list va;
if (!Quiet) {
va_start( va, msg );
vprintf( msg, va );
va_end( va );
fflush( stdout );
}
}
static void
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
git_vasprintf( char **strp, const char *fmt, va_list ap )
{
int len;
char tmp[1024];
if ((len = vsnprintf( tmp, sizeof(tmp), fmt, ap )) < 0 || !(*strp = xmalloc( len + 1 )))
return -1;
if (len >= (int)sizeof(tmp))
vsprintf( *strp, fmt, ap );
else
memcpy( *strp, tmp, len + 1 );
return len;
}
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 int
nfvasprintf( char **str, const char *fmt, va_list va )
{
int ret = git_vasprintf( str, fmt, va );
if (ret < 0)
die( "Fatal: Out of memory\n");
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( 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;
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) {
info( "Starting tunnel '%s'... ", srvc->tunnel );
if (socketpair( PF_UNIX, SOCK_STREAM, 0, a )) {
perror( "socketpair" );
exit( 1 );
}
if (fork() == 0) {
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];
info( "ok\n" );
} else {
memset( &addr, 0, sizeof(addr) );
addr.sin_port = htons( srvc->port );
addr.sin_family = AF_INET;
info( "Resolving %s... ", srvc->host );
he = gethostbyname( srvc->host );
if (!he) {
perror( "gethostbyname" );
goto bail;
}
info( "ok\n" );
addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
s = socket( PF_INET, SOCK_STREAM, 0 );
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;
}
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) {