int process_xover_msg(struct DayDream_Message* dd_msg) {
int number_of_lines;
int number_of_bytes;
struct tm* t;
char tmpbuf[128];
generate_temp_message(dd_msg->MSG_NUMBER);
number_of_lines = count_lines_in_temp_message();
number_of_bytes = count_bytes_in_temp_message();
t = gmtime(&dd_msg->MSG_CREATION);
strftime(tmpbuf, 128, "%a, %d %b %Y %H:%M:%S -0000", t);
printf("%d\t%s\t%s <dummy@localhost>\t%s\t%s\t%s\t%d\t%d\t\r\n",
dd_msg->MSG_NUMBER,
dd_msg->MSG_SUBJECT,
strip_hibit((unsigned char*) dd_msg->MSG_AUTHOR),
tmpbuf,
generate_message_id(dd_msg->MSG_NUMBER),
"",
number_of_bytes,
number_of_lines
);
return 0;
}
int print_message_headers(int messagenumber) {
int fd;
int ok;
int number_of_lines;
char tmpbuf[128];
struct DayDream_Message dd_msg;
struct tm* t;
fd = ddmsg_open_base(current_conf->CONF_PATH, current_base->MSGBASE_NUMBER, O_RDONLY, 0660);
if(fd < 0) {
return -1;
}
ok = 0;
while(read(fd, &dd_msg, sizeof(struct DayDream_Message)) == sizeof(struct DayDream_Message)) {
if(dd_msg.MSG_NUMBER == messagenumber) {
ok = 1;
break;
}
}
ddmsg_close_base(fd);
if(!ok) {
return -1;
}
generate_temp_message(messagenumber);
number_of_lines = count_lines_in_temp_message();
t = gmtime(&dd_msg.MSG_CREATION);
strftime(tmpbuf, 128, "%a, %d %b %Y %H:%M:%S GMT", t);
strip_hibit((unsigned char*) dd_msg.MSG_AUTHOR);
strip_hibit((unsigned char*) dd_msg.MSG_RECEIVER);
printf("Path: localhost!not-for-mail\r\n");
printf("From: %s <dummy@localhost>\r\n", dd_msg.MSG_AUTHOR);
printf("Newsgroups: %s.%s\r\n", current_conf->CONF_NAME, current_base->MSGBASE_FN_TAG);
printf("Message-ID: %s\r\n", generate_message_id(messagenumber));
printf("Subject: %s\r\n", dd_msg.MSG_SUBJECT);
printf("Date: %s\r\n", tmpbuf);
printf("Lines: %d\r\n", number_of_lines);
printf("X-FTN-TO: %s\r\n", dd_msg.MSG_RECEIVER);
return 0;
}
void send_private_message(char* message, int sock_fd) {
//message body
char package[TOKEN_LENTH + 1] = {'\0'};memcpy(package, message, TOKEN_LENTH);
//header
message_header m_header;
m_header.type = PRIVATE;
generate_message_id(m_header.id);
//convert the local variable to network
m_header.payload_length = htons(strlen(package) + 1);
if (sizeof(m_header) != 12) {
printf("message length is %d", sizeof(m_header));
throw_exception(FATAL_ERROR, "sizeof(m_header) != 12\n");
}
//send the message to all connections
send_message(sock_fd, &m_header, package);
}
void send_udp_message() {
// double check for network variables
inet_pton(AF_INET, local_ip, &network_ip);
self_peer_msg.ip = network_ip;
printf("sender ip: %s", local_ip);
self_peer_msg.udp_port = network_udp_port;
add_peer_token_to_container(self_peer_msg.peer_token, self_peer_msg.udp_port, self_peer_msg.ip, tcp_port);
//message body
char package[TOKEN_LENTH + 7] = {'\0'};memcpy
(package, self_peer_msg.peer_token, TOKEN_LENTH);
memcpy(package + TOKEN_LENTH, &network_ip, 4);
memcpy(package + TOKEN_LENTH + 4, &self_peer_msg.udp_port, 2);
/* begin broadcasting */
int i, sock_fd = -1;
for (i = 0; i < MAX_CONNECTIONS; i++) {
sock_fd = get_conn_fd(i);
if (sock_fd != -1) {
/* construct message header */
message_header mh;
init_header(&mh);
generate_message_id(mh.id);
mh.type = BROADCAST;
mh.payload_length = htons(strlen(package) + 1);
if (sizeof(mh) != 12) {
printf("mh length is %d\n", sizeof(mh));
throw_exception(ERROR, "sizeof(mh) != 12\n");
}
send_message(sock_fd, &mh, package);
/* add msg_id to msg_bag */
if (is_new_msg(mh.id))
add_msg_to_container(mh.id);
}
}
}
int main(int argc, char *argv[])
{
char buf[128];
char filename[128];
char dd[128];
char user_str[128];
char* ptr;
int tmp;
int first_arg;
int second_arg;
int i;
auth_ok = 0;
for(i=0; i < argc; ++i) {
if(!strcmp(argv[i], "-a")) {
auth_ok = 1;
}
}
current_conf = NULL;
current_base = NULL;
ptr = getenv("DAYDREAM");
if(!ptr) {
syslog(0, "Can't get DAYDREAM env");
exit(1);
}
strncpy(dd, ptr, 128);
datadir = dd;
printf("200 DDNNTP ready to serve\r\n");
fflush(stdout);
while(1) {
if(fgets(buf, 128, stdin) == NULL) {
break;
}
strip_crlf(buf);
if(!strncasecmp(buf, "LIST", 4)) {
if(check_auth()) {
if(strlen(buf) > 5) {
if(!strncasecmp(buf+5, "NEWSGROUPS", 10)) {
generate_list_with_desc();
}
else {
generate_list();
}
}
else {
generate_list();
}
}
}
else if(!strncasecmp(buf, "GROUP", 5)) {
if(check_auth()) {
if(strlen(buf) < 7) {
printf("411 no such news group\r\n");
}
else {
if(do_group_command(buf+6, 1) < 0) {
printf("411 no such news group\r\n");
}
}
}
}
else if(!strncasecmp(buf, "HEAD", 4) ||
!strncasecmp(buf, "BODY", 4) ||
!strncasecmp(buf, "ARTICLE", 7)) {
if(check_auth()) {
if(!current_base || !current_conf) {
printf("412 No newsgroup has been selected.\r\n");
}
else {
if(!strncasecmp(buf, "ARTICLE", 7)) {
parse_input_message_id(buf+8, &tmp);
}
else {
parse_input_message_id(buf+5, &tmp);
}
if(message_num_ok(tmp)) {
if(!strncasecmp(buf, "HEAD", 4)) {
printf("221 %d %s article retrieved - head follows\r\n", tmp, generate_message_id(tmp));
print_message_headers(tmp);
printf(".\r\n");
}
else if(!strncasecmp(buf, "BODY", 4)) {
printf("222 %d %s article retrieved - body follows\r\n", tmp, generate_message_id(tmp));
print_message(tmp);
printf(".\r\n");
}
else {
printf("220 %d %s article retrieved - head and body follow\r\n", tmp, generate_message_id(tmp));
print_message_headers(tmp);
printf("\r\n");
print_message(tmp);
printf(".\r\n");
}
}
else {
printf("423 No such article number in this group.\r\n");
}
}
}
}
else if(!strncasecmp(buf, "QUIT", 4)) {
printf("205 Closing connection - Goodbye!\r\n");
break;
}
else if(!strncasecmp(buf, "MODE READER", 11)) {
printf("200 Hello, you can post.\r\n");
}
else if(!strncasecmp(buf, "XOVER", 5)) {
if(check_auth()) {
if(!current_base || !current_conf) {
printf("412 No news group current selected.\r\n");
}
else {
ptr = strchr(buf+5, '-');
if(ptr == NULL) {
printf("420 No article(s) selected.\r\n");
}
else {
*ptr = '\0';
first_arg = atoi(buf+6);
second_arg = atoi(ptr+1);
printf("224 %d-%d fields follow\r\n", first_arg, second_arg);
process_xover(first_arg, second_arg);
printf(".\r\n");
}
}
}
}
else if(!strncasecmp(buf, "POST", 4)) {
if(check_auth()) {
printf("340 Ok\r\n");
fflush(stdout);
if(!process_post()) {
printf("240 Article posted.\r\n");
syslog(LOG_INFO, "Message posted\n");
}
else {
printf("441 posting failed.\r\n");
syslog(LOG_INFO, "Message post failed\n");
}
}
}
else if(!strncasecmp(buf, "IHAVE", 5)) {
if(check_auth()) {
printf("335 Go ahead\r\n");
fflush(stdout);
if(!process_post()) {
printf("235 Article posted.\r\n");
}
else {
printf("435 posting failed.\r\n");
}
}
}
else if(!strncasecmp(buf, "AUTHINFO", 8)) {
if(!strncasecmp(buf+9, "USER", 4)) {
strncpy(user_str, buf+14, 128);
printf("381 More authentication information required.\r\n");
}
else if(!strncasecmp(buf+9, "PASS", 4)) {
struct userbase* u = ddgetpwnam(user_str);
if(!u) {
printf("482 Authentication rejected.\r\n");
}
else if(cmppasswds(buf+14, u->user_password)) {
syslog(LOG_INFO, "User %s logged in", user_str);
printf("281 Authentication accepted.\r\n");
auth_ok = 1;
}
else {
printf("482 Authentication rejected.\r\n");
}
}
}
else {
printf("500 Command not recognized\r\n");
syslog(LOG_INFO, "Unknown command: %s", buf);
}
fflush(stdout);
}
sprintf(filename, "/tmp/msg.%d", getpid());
unlink(filename);
return 0;
}
