mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 08:12:17 +00:00
38bc7729f5
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12641 b3059339-0415-0410-9bf9-f77b7e298cf2
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
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/*
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* Common stuff for netstream
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* Packets and so on are defined here along with a few helpers
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* wich are used by both the client and the server
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*
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* Data is always low endian
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*/
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typedef struct mp_net_stream_packet_st {
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uint16_t len;
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uint8_t cmd;
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char data[0];
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} __attribute__ ((packed)) mp_net_stream_packet_t;
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#define PACKET_MAX_SIZE 4096
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// Commands sent by the client
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#define NET_STREAM_OPEN 0
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// data is the url
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#define NET_STREAM_FILL_BUFFER 1
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// data is an uint16 wich is the max len of the data to return
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#define NET_STREAM_SEEK 3
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// data is an uint64 wich the pos where to seek
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#define NET_STREAM_CLOSE 4
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// no data
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#define NET_STREAM_RESET 5
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// no data
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// Server response
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#define NET_STREAM_OK 128
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// Data returned if open is successful
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typedef struct mp_net_stream_opened_st {
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uint32_t file_format;
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uint32_t flags;
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uint32_t sector_size;
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uint64_t start_pos;
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uint64_t end_pos;
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} __attribute__ ((packed)) mp_net_stream_opened_t;
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// FILL_BUFFER return the data
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// CLOSE return nothing
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#define NET_STREAM_ERROR 129
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// Data is the error message (if any ;)
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static int net_read(int fd, char* buf, int len) {
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int r = 0;
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while(len) {
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r = recv(fd,buf,len,0);
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if(r <= 0) {
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if(errno == EINTR) continue;
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if(r < 0)
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mp_msg(MSGT_NETST,MSGL_ERR,"Read failed: %s\n",strerror(errno));
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return 0;
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}
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len -= r;
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buf += r;
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}
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return 1;
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}
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static mp_net_stream_packet_t* read_packet(int fd) {
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uint16_t len;
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mp_net_stream_packet_t* pack =
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(mp_net_stream_packet_t*)malloc(sizeof(mp_net_stream_packet_t));
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if(!net_read(fd,(char*)pack,sizeof(mp_net_stream_packet_t))) {
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free(pack);
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return NULL;
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}
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pack->len = le2me_16(pack->len);
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if(pack->len < sizeof(mp_net_stream_packet_t)) {
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mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid packet (too small: %d)\n",pack->len);
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free(pack);
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return NULL;
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}
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if(pack->len > PACKET_MAX_SIZE) {
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mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid packet (too big: %d)\n",pack->len);
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free(pack);
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return NULL;
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}
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len = pack->len;
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if(len > sizeof(mp_net_stream_packet_t)) {
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pack = realloc(pack,len);
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if(!pack) {
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mp_msg(MSGT_NETST,MSGL_ERR,"Failed to get memory for the packet (%d bytes)\n",len);
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return NULL;
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}
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if(!net_read(fd,pack->data,len - sizeof(mp_net_stream_packet_t)))
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return NULL;
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}
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// printf ("Read packet %d %d %d\n",fd,pack->cmd,pack->len);
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return pack;
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}
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static int net_write(int fd, char* buf, int len) {
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int w;
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while(len) {
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w = send(fd,buf,len,0);
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if(w <= 0) {
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if(errno == EINTR) continue;
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if(w < 0)
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mp_msg(MSGT_NETST,MSGL_ERR,"Write failed: %s\n",strerror(errno));
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return 0;
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}
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len -= w;
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buf += w;
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}
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return 1;
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}
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static int write_packet(int fd, uint8_t cmd,char* data,int len) {
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mp_net_stream_packet_t* pack = malloc(len + sizeof(mp_net_stream_packet_t));
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if(len > 0 && data)
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memcpy(pack->data,data,len);
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pack->len = len + sizeof(mp_net_stream_packet_t);
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pack->cmd = cmd;
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// printf("Write packet %d %d (%p) %d\n",fd,cmd,data,len);
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pack->len = le2me_16(pack->len);
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if(net_write(fd,(char*)pack,pack->len)) {
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free(pack);
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return 1;
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}
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free(pack);
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return 0;
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}
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static void net_stream_opened_2_me(mp_net_stream_opened_t* o) {
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o->file_format = le2me_32(o->file_format);
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o->flags = le2me_32(o->flags);
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o->sector_size = le2me_32(o->sector_size);
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o->start_pos = le2me_64(o->start_pos);
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o->end_pos = le2me_64(o->end_pos);
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}
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