1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* 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
*
* Data is always low endian
*/
#ifndef NETSTREAM_H
#define NETSTREAM_H
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 = recv(fd,buf,len,0);
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;
buf += 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;
}
pack->len = le2me_16(pack->len);
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 = send(fd,buf,len,0);
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;
buf += 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);
pack->len = le2me_16(pack->len);
if(net_write(fd,(char*)pack,pack->len)) {
free(pack);
return 1;
}
free(pack);
return 0;
}
static void net_stream_opened_2_me(mp_net_stream_opened_t* o) {
o->file_format = le2me_32(o->file_format);
o->flags = le2me_32(o->flags);
o->sector_size = le2me_32(o->sector_size);
o->start_pos = le2me_64(o->start_pos);
o->end_pos = le2me_64(o->end_pos);
}
#endif /* NETSTREAM_H */
|
