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/*
* Common stuff for netstream
* Packets and so on are defined here along with a few helpers
* wich are used by both the client and the server
*/
typedef struct mp_net_stream_packet_st {
uint16_t len;
uint8_t cmd;
char data[0];
} __attribute__ ((packed)) mp_net_stream_packet_t;
#define PACKET_MAX_SIZE 4096
// Commands sent by the client
#define NET_STREAM_OPEN 0
// data is the url
#define NET_STREAM_FILL_BUFFER 1
// data is an uint16 wich is the max len of the data to return
#define NET_STREAM_SEEK 3
// data is an uint64 wich the pos where to seek
#define NET_STREAM_CLOSE 4
// no data
#define NET_STREAM_RESET 5
// no data
// Server response
#define NET_STREAM_OK 128
// Data returned if open is successful
typedef struct mp_net_stream_opened_st {
uint32_t file_format;
uint32_t flags;
uint32_t sector_size;
uint64_t start_pos;
uint64_t end_pos;
} __attribute__ ((packed)) mp_net_stream_opened_t;
// FILL_BUFFER return the data
// CLOSE return nothing
#define NET_STREAM_ERROR 129
// Data is the error message (if any ;)
static int net_read(int fd, char* buf, int len) {
int r = 0;
while(len) {
r = read(fd,buf,len);
if(r <= 0) {
if(errno == EINTR) continue;
if(r < 0)
mp_msg(MSGT_NETST,MSGL_ERR,"Read failed: %s\n",strerror(errno));
return 0;
}
len -= r;
}
return 1;
}
static mp_net_stream_packet_t* read_packet(int fd) {
uint16_t len;
mp_net_stream_packet_t* pack =
(mp_net_stream_packet_t*)malloc(sizeof(mp_net_stream_packet_t));
if(!net_read(fd,(char*)pack,sizeof(mp_net_stream_packet_t))) {
free(pack);
return NULL;
}
if(pack->len < sizeof(mp_net_stream_packet_t)) {
mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid packet (too small: %d)\n",pack->len);
free(pack);
return NULL;
}
if(pack->len > PACKET_MAX_SIZE) {
mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid packet (too big: %d)\n",pack->len);
free(pack);
return NULL;
}
len = pack->len;
if(len > sizeof(mp_net_stream_packet_t)) {
pack = realloc(pack,len);
if(!pack) {
mp_msg(MSGT_NETST,MSGL_ERR,"Failed to get memory for the packet (%d bytes)\n",len);
return NULL;
}
if(!net_read(fd,pack->data,len - sizeof(mp_net_stream_packet_t)))
return NULL;
}
// printf ("Read packet %d %d %d\n",fd,pack->cmd,pack->len);
return pack;
}
static int net_write(int fd, char* buf, int len) {
int w;
while(len) {
w = write(fd,buf,len);
if(w <= 0) {
if(errno == EINTR) continue;
if(w < 0)
mp_msg(MSGT_NETST,MSGL_ERR,"Write failed: %s\n",strerror(errno));
return 0;
}
len -= w;
}
return 1;
}
static int write_packet(int fd, uint8_t cmd,char* data,int len) {
mp_net_stream_packet_t* pack = malloc(len + sizeof(mp_net_stream_packet_t));
if(len > 0 && data)
memcpy(pack->data,data,len);
pack->len = len + sizeof(mp_net_stream_packet_t);
pack->cmd = cmd;
// printf("Write packet %d %d (%p) %d\n",fd,cmd,data,len);
if(net_write(fd,(char*)pack,pack->len)) {
free(pack);
return 1;
}
free(pack);
return 0;
}
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