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/*
* osd.cpp: A program for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <poll.h>
#include <netdb.h>
#include <libintl.h>
#include <locale.h>
#include <stdarg.h>
#include <stdio.h>
#include "osd.h"
#include "debug.h"
cOSDMessage::cOSDMessage(const char *hostName, int portNumber) {
msg = nullptr;
host = strdup(hostName);
ALLOC(strlen(host)+1, "host");
port = portNumber;
SendMessage(this);
}
cOSDMessage::~cOSDMessage() {
if (tid) pthread_join(tid, nullptr);
if (msg) {
FREE(strlen(msg)+1, "msg");
free(msg);
}
if (host) {
FREE(strlen(host)+1, "host");
free(host);
}
}
bool cOSDMessage::ReadReply(int fd, char **reply) {
usleep(400000);
char c = ' ';
int repsize = 0;
int msgsize = 0;
if (reply) *reply = nullptr;
do {
struct pollfd fds;
fds.fd = fd;
fds.events = POLLIN;
fds.revents = 0;
int ret = poll(&fds, 1, 600);
if (ret <= 0) return false;
if (fds.revents != POLLIN) return false;
if (read(fd, &c, 1) < 0) return false;
if ((reply) && (c != 10) && (c != 13)) {
msgsize++;
while ((msgsize + 5) > repsize) {
repsize += 80;
char *tmp = static_cast<char *>(realloc(*reply, repsize));
if (!tmp) {
free(*reply);
*reply = nullptr;
return false;
}
else {
*reply = tmp;
}
}
(*reply)[msgsize - 1] = c;
(*reply)[msgsize] = 0;
}
}
while (c != '\n');
return true;
}
void *cOSDMessage::SendMessage(void *posd) {
cOSDMessage *osd = static_cast<cOSDMessage *>(posd);
const struct hostent *host = gethostbyname(osd->host);
if (!host) {
osd->tid = 0;
return nullptr;
}
struct sockaddr_in name;
name.sin_family = AF_INET;
name.sin_port = htons(osd->port);
memcpy(&name.sin_addr.s_addr, host->h_addr, host->h_length);
uint size = sizeof(name);
int sock;
sock=socket(PF_INET, SOCK_STREAM, 0);
if (sock < 0) return nullptr;
if (connect(sock, reinterpret_cast<struct sockaddr *>(&name), size) != 0 ) {
close(sock);
return nullptr;
}
char *reply = nullptr;
if (!osd->ReadReply(sock, &reply)) {
if (reply) free(reply);
close(sock);
return nullptr;
}
ssize_t ret;
if (osd->msg) {
if (reply) free(reply);
ret=write(sock, "MESG ", 5);
if (ret != (ssize_t) - 1) ret = write(sock,osd->msg,strlen(osd->msg));
if (ret != (ssize_t) - 1) ret = write(sock, "\r\n", 2);
if (!osd->ReadReply(sock) || (ret == (ssize_t) - 1)) {
close(sock);
return nullptr;
}
}
else {
if (reply) {
char *cs = strrchr(reply, ';');
if (cs) {
cs += 2;
trcs(cs);
}
else {
trcs("UTF-8"); // just a guess
}
free(reply);
}
else {
trcs("UTF-8"); // just a guess
}
}
ret=write(sock, "QUIT\r\n", 6);
if (ret != (ssize_t) - 1) osd->ReadReply(sock);
close(sock);
return nullptr;
}
int cOSDMessage::Send(const char *format, ...) {
if (tid) pthread_join(tid, nullptr);
if (msg) {
FREE(strlen(msg) + 1, "msg");
free(msg);
}
va_list ap;
va_start(ap, format);
if (vasprintf(&msg, format, ap) == -1) {
va_end(ap);
return -1;
}
ALLOC(strlen(msg) + 1, "msg");
va_end(ap);
if (pthread_create(&tid, nullptr, reinterpret_cast<void *(*) (void *)>(&SendMessage), reinterpret_cast<void *>(this)) != 0 ) return -1;
return 0;
}
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