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imap-envelope.c
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imap-envelope.c
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/* Copyright (c) 2002-2017 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "istream.h"
#include "str.h"
#include "message-address.h"
#include "message-parser.h"
#include "imap-parser.h"
#include "imap-envelope.h"
#include "imap-quote.h"
struct message_part_envelope_data {
const char *date, *subject;
struct message_address *from, *sender, *reply_to;
struct message_address *to, *cc, *bcc;
const char *in_reply_to, *message_id;
};
enum envelope_field {
ENVELOPE_FIELD_DATE = 0,
ENVELOPE_FIELD_SUBJECT,
ENVELOPE_FIELD_FROM,
ENVELOPE_FIELD_SENDER,
ENVELOPE_FIELD_REPLY_TO,
ENVELOPE_FIELD_TO,
ENVELOPE_FIELD_CC,
ENVELOPE_FIELD_BCC,
ENVELOPE_FIELD_IN_REPLY_TO,
ENVELOPE_FIELD_MESSAGE_ID,
ENVELOPE_FIELD_UNKNOWN
};
const char *imap_envelope_headers[] = {
"Date", "Subject", "From", "Sender", "Reply-To",
"To", "Cc", "Bcc", "In-Reply-To", "Message-ID",
NULL
};
static enum envelope_field
envelope_get_field(const char *name)
{
switch (*name) {
case 'B':
case 'b':
if (strcasecmp(name, "Bcc") == 0)
return ENVELOPE_FIELD_BCC;
break;
case 'C':
case 'c':
if (strcasecmp(name, "Cc") == 0)
return ENVELOPE_FIELD_CC;
break;
case 'D':
case 'd':
if (strcasecmp(name, "Date") == 0)
return ENVELOPE_FIELD_DATE;
break;
case 'F':
case 'f':
if (strcasecmp(name, "From") == 0)
return ENVELOPE_FIELD_FROM;
break;
case 'I':
case 'i':
if (strcasecmp(name, "In-reply-to") == 0)
return ENVELOPE_FIELD_IN_REPLY_TO;
break;
case 'M':
case 'm':
if (strcasecmp(name, "Message-id") == 0)
return ENVELOPE_FIELD_MESSAGE_ID;
break;
case 'R':
case 'r':
if (strcasecmp(name, "Reply-to") == 0)
return ENVELOPE_FIELD_REPLY_TO;
break;
case 'S':
case 's':
if (strcasecmp(name, "Subject") == 0)
return ENVELOPE_FIELD_SUBJECT;
if (strcasecmp(name, "Sender") == 0)
return ENVELOPE_FIELD_SENDER;
break;
case 'T':
case 't':
if (strcasecmp(name, "To") == 0)
return ENVELOPE_FIELD_TO;
break;
}
return ENVELOPE_FIELD_UNKNOWN;
}
void imap_envelope_parse_header(pool_t pool,
struct message_part_envelope_data **data,
struct message_header_line *hdr)
{
struct message_part_envelope_data *d;
enum envelope_field field;
struct message_address **addr_p;
const char **str_p;
if (*data == NULL) {
*data = p_new(pool, struct message_part_envelope_data, 1);
}
if (hdr == NULL)
return;
field = envelope_get_field(hdr->name);
if (field == ENVELOPE_FIELD_UNKNOWN)
return;
if (hdr->continues) {
/* wait for full value */
hdr->use_full_value = TRUE;
return;
}
d = *data;
addr_p = NULL; str_p = NULL;
switch (field) {
case ENVELOPE_FIELD_DATE:
str_p = &d->date;
break;
case ENVELOPE_FIELD_SUBJECT:
str_p = &d->subject;
break;
case ENVELOPE_FIELD_MESSAGE_ID:
str_p = &d->message_id;
break;
case ENVELOPE_FIELD_IN_REPLY_TO:
str_p = &d->in_reply_to;
break;
case ENVELOPE_FIELD_CC:
addr_p = &d->cc;
break;
case ENVELOPE_FIELD_BCC:
addr_p = &d->bcc;
break;
case ENVELOPE_FIELD_FROM:
addr_p = &d->from;
break;
case ENVELOPE_FIELD_SENDER:
addr_p = &d->sender;
break;
case ENVELOPE_FIELD_TO:
addr_p = &d->to;
break;
case ENVELOPE_FIELD_REPLY_TO:
addr_p = &d->reply_to;
break;
case ENVELOPE_FIELD_UNKNOWN:
i_unreached();
}
if (addr_p != NULL) {
*addr_p = message_address_parse(pool, hdr->full_value,
hdr->full_value_len,
UINT_MAX, TRUE);
} else if (str_p != NULL) {
*str_p = p_strndup(pool,
hdr->full_value, hdr->full_value_len);
}
}
static void imap_write_address(string_t *str, struct message_address *addr)
{
if (addr == NULL) {
str_append(str, "NIL");
return;
}
str_append_c(str, '(');
while (addr != NULL) {
str_append_c(str, '(');
if (addr->name == NULL)
str_append(str, "NIL");
else {
imap_append_string_for_humans(str,
(const void *)addr->name, strlen(addr->name));
}
str_append_c(str, ' ');
imap_append_nstring(str, addr->route);
str_append_c(str, ' ');
imap_append_nstring(str, addr->mailbox);
str_append_c(str, ' ');
imap_append_nstring(str, addr->domain);
str_append_c(str, ')');
addr = addr->next;
}
str_append_c(str, ')');
}
void imap_envelope_write_part_data(struct message_part_envelope_data *data,
string_t *str)
{
#define NVL(str, nullstr) ((str) != NULL ? (str) : (nullstr))
static const char *empty_envelope =
"NIL NIL NIL NIL NIL NIL NIL NIL NIL NIL";
if (data == NULL) {
str_append(str, empty_envelope);
return;
}
imap_append_nstring(str, data->date);
str_append_c(str, ' ');
if (data->subject == NULL)
str_append(str, "NIL");
else {
imap_append_string_for_humans(str,
(const unsigned char *)data->subject,
strlen(data->subject));
}
str_append_c(str, ' ');
imap_write_address(str, data->from);
str_append_c(str, ' ');
imap_write_address(str, NVL(data->sender, data->from));
str_append_c(str, ' ');
imap_write_address(str, NVL(data->reply_to, data->from));
str_append_c(str, ' ');
imap_write_address(str, data->to);
str_append_c(str, ' ');
imap_write_address(str, data->cc);
str_append_c(str, ' ');
imap_write_address(str, data->bcc);
str_append_c(str, ' ');
imap_append_nstring(str, data->in_reply_to);
str_append_c(str, ' ');
imap_append_nstring(str, data->message_id);
}
static bool
imap_envelope_parse_address(const struct imap_arg *arg,
pool_t pool, struct message_address **addr_r)
{
struct message_address *addr;
const struct imap_arg *list_args;
const char *name, *route, *mailbox, *domain;
unsigned int list_count;
if (!imap_arg_get_list_full(arg, &list_args, &list_count))
return FALSE;
/* we require 4 arguments, strings or NILs */
if (list_count < 4)
return FALSE;
if (!imap_arg_get_nstring(&list_args[0], &name))
return FALSE;
if (!imap_arg_get_nstring(&list_args[1], &route))
return FALSE;
if (!imap_arg_get_nstring(&list_args[2], &mailbox))
return FALSE;
if (!imap_arg_get_nstring(&list_args[3], &domain))
return FALSE;
addr = p_new(pool, struct message_address, 1);
addr->name = p_strdup(pool, name);
addr->route = p_strdup(pool, route);
addr->mailbox = p_strdup(pool, mailbox);
addr->domain = p_strdup(pool, domain);
*addr_r = addr;
return TRUE;
}
static bool
imap_envelope_parse_addresses(const struct imap_arg *arg,
pool_t pool, struct message_address **addrs_r)
{
struct message_address *first, *addr, *prev;
const struct imap_arg *list_args;
if (arg->type == IMAP_ARG_NIL) {
*addrs_r = NULL;
return TRUE;
}
if (!imap_arg_get_list(arg, &list_args))
return FALSE;
first = addr = prev = NULL;
for (; !IMAP_ARG_IS_EOL(list_args); list_args++) {
if (!imap_envelope_parse_address
(list_args, pool, &addr))
return FALSE;
if (first == NULL)
first = addr;
if (prev != NULL)
prev->next = addr;
prev = addr;
}
*addrs_r = first;
return TRUE;
}
bool imap_envelope_parse_args(const struct imap_arg *args,
pool_t pool, struct message_part_envelope_data **envlp_r,
const char **error_r)
{
struct message_part_envelope_data *envlp;
envlp = p_new(pool, struct message_part_envelope_data, 1);
if (!imap_arg_get_nstring(args++, &envlp->date)) {
*error_r = "Invalid date field";
return FALSE;
}
envlp->date = p_strdup(pool, envlp->date);
if (!imap_arg_get_nstring(args++, &envlp->subject)) {
*error_r = "Invalid subject field";
return FALSE;
}
envlp->subject = p_strdup(pool, envlp->subject);
if (!imap_envelope_parse_addresses(args++, pool, &envlp->from)) {
*error_r = "Invalid from field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->sender)) {
*error_r = "Invalid sender field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->reply_to)) {
*error_r = "Invalid reply_to field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->to)) {
*error_r = "Invalid to field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->cc)) {
*error_r = "Invalid cc field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->bcc)) {
*error_r = "Invalid bcc field";
return FALSE;
}
if (!imap_arg_get_nstring(args++, &envlp->in_reply_to)) {
*error_r = "Invalid in_reply_to field";
return FALSE;
}
envlp->in_reply_to = p_strdup(pool, envlp->in_reply_to);
if (!imap_arg_get_nstring(args++, &envlp->message_id)) {
*error_r = "Invalid message_id field";
return FALSE;
}
envlp->message_id = p_strdup(pool, envlp->message_id);
*envlp_r = envlp;
return TRUE;
}