Hello.
My callback for get_stream is called from mail_get_stream in
mail_storage_copy. Further, mbox_save_init is called and it called
mbox_save_get_input_stream.
backtrace (A) for my callback:
#0 i_stream_header_filter_read (stream=0x8147e00) at istream-header-
filter.c:314
#1 0x080cdbaa in parse_header (mstream=0x8147e00) at istream-header-
filter.c:356
#2 0x080cdc0c in i_stream_header_filter_seek (stream=0x8147e00,
v_offset=0, mark=false) at istream-header-filter.c:370
#3 0x080dea5b in i_stream_seek (stream=0x8147e28, v_offset=0) at
istream.c:155
#4 0x080dfeae in i_stream_create_concat (input=0x8115528) at istream-
concat.c:260
#5 0x2831e03d in rarules_get_stream (mail=0x8141860, hdr_size=0x0,
body_size=0x0, stream_r=0xbfbfe920)
at /home/pitman/work/rarules/src/rarules-plugin.c:181
#6 0x0809d830 in mail_get_stream (mail=0x8141860, hdr_size=0x0,
body_size=0x0, stream_r=0xbfbfe920) at mail.c:149
#7 0x0809d936 in mail_storage_copy (t=0x811b980, mail=0x8141860,
flags=0, keywords=0x0, dest_mail=0x0) at mail-copy.c:17
#8 0x080a0632 in mailbox_copy (t=0x811b980, mail=0x8141860, flags=0,
keywords=0x0, dest_mail=0x0) at mail-storage.c:763
#9 0x0805960d in deliver_save (namespaces=0x8121c68,
storage_r=0xbfbfeb94, mailbox=0x811a360 "Draft", mail=0x8141860,
flags=0, keywords=0x0) at deliver.c:234
...
backtrace (B) for mbox_save_init:
#0 mbox_save_get_input_stream (ctx=0x811bb00, input=0x814c728) at
mbox-save.c:384
#1 0x08078165 in mbox_save_init (_t=0x811b980, flags=0, keywords=0x0,
received_date=1239634649, timezone_offset=0,
from_envelope=0x80f292b "MAILER-DAEMON", input=0x814c728,
dest_mail=0x8150060, ctx_r=0xbfbfe924) at mbox-save.c:512
#2 0x080a0560 in mailbox_save_init (t=0x811b980, flags=0,
keywords=0x0, received_date=-1, timezone_offset=0,
from_envelope=0x80f292b "MAILER-DAEMON", input=0x814c728,
dest_mail=0x0, ctx_r=0xbfbfe924) at mail-storage.c:728
#3 0x0809d9c4 in mail_storage_copy (t=0x811b980, mail=0x8141860,
flags=0, keywords=0x0, dest_mail=0x0) at mail-copy.c:28
#4 0x080a0632 in mailbox_copy (t=0x811b980, mail=0x8141860, flags=0,
keywords=0x0, dest_mail=0x0) at mail-storage.c:763
#5 0x0805960d in deliver_save (namespaces=0x8121c68,
storage_r=0xbfbfeb94, mailbox=0x80f2af9 "INBOX", mail=0x8141860,
flags=0, keywords=0x0) at deliver.c:234
...
The function mbox_save_get_input_stream calls
i_stream_create_header_filter and i_stream_create_concat.
The function read_header (istream-header-filter.c) finds EOH for call
of i_stream_seek (backtrace B), but my calls of
i_stream_create_header_filter and i_stream_create_concat doesn't find
EOH (backtrace A). Why? I don't understand.
I want to call rarules_header_callback for disable eoh so as to add my
headers.
Thanks
P.S. Sorry for my bad english :-(
It's mbox_save_get_input_stream:
--------------------------------------------
mbox_save_get_input_stream(struct mbox_save_context *ctx, struct
istream *input)
{
struct istream *filter, *ret, *cache_input, *streams[3];
/* filter out unwanted headers and keep track of headers' MD5
sum */
filter = i_stream_create_header_filter(input,
HEADER_FILTER_EXCLUDE |
HEADER_FILTER_NO_CR |
HEADER_FILTER_ADD_MISSING_EOH,
mbox_save_drop_headers,
mbox_save_drop_headers_count,
save_header_callback,
ctx);
if ((ctx->mbox->storage->storage.flags &
MAIL_STORAGE_FLAG_KEEP_HEADER_MD5) != 0) {
/* we're using MD5 sums to generate POP3 UIDLs.
clients don't like it much if there are duplicates,
so make sure that there can't be any by appending
our own X-Delivery-ID header. */
const char *hdr;
T_BEGIN {
mbox_save_x_delivery_id(ctx);
} T_END;
hdr = ctx->x_delivery_id_header;
streams[0] = i_stream_create_from_data(hdr,
strlen(hdr));
streams[1] = filter;
streams[2] = NULL;
ret = i_stream_create_concat(streams);
i_stream_unref(&filter);
filter = ret;
}
It's my callback for get_stream:
---------------------------------------
static int rarules_get_stream(struct mail *mail, struct message_size
*hdr_size,
struct message_size *body_size,
struct istream **stream_r)
{
struct rarules_mail *m = RA_MAIL_CONTEXT(mail);
struct istream *stream = NULL;
unsigned int deleted = 0;
unsigned int added = 0;
int ret = 0;
DPRINT("func is called");
/* standard get_stream for mail storage format */
ret = m->module_ctx.super.get_stream(mail, hdr_size,
body_size, &stream);
added = array_count(&m->add_hdr_arr);
deleted = array_count(&m->del_hdr_arr);
if (m->enabled && (deleted || added)) {
struct istream * tmp = NULL;
struct istream **chunks = NULL;
const unsigned int max_chunks = 4;
unsigned int i = 0;
unsigned int cnt = 0;
DPRINT("modifing message headers");
/* create message from chunks with new hdrs
and skip excluded hdrs */
chunks = t_new(struct istream *, max_chunks);
chunks[cnt++] =
make_header_filter(stream, &m->del_hdr_arr,
deleted);
if (added) {
chunks[cnt++] =
create_header_stream(&m->add_hdr_arr,
added);
}
chunks[cnt++] = create_stream_for_msgbody(stream);
chunks[cnt++] = NULL;
tmp = i_stream_create_concat(chunks);
for (i = 0; chunks[i] != NULL; ++i) {
i_stream_unref(&chunks[i]);
}
i_stream_unref(&stream);
stream = tmp;
}
*stream_r = stream;
DPRINT("func is executed");
return ret;
}
