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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
#ifndef _WIN32
#include <arpa/inet.h>
#include <netdb.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include <fstream>
#include <iostream>
#include <cstdlib>
#include <string>
#include <sstream>
#include <vector>
#include <iterator>
#include <algorithm>
#include <srt.h>
using namespace std;
string ShowChar(char in)
{
if (in >= 32 && in < 127)
return string(1, in);
ostringstream os;
os << "<" << hex << uppercase << int(in) << ">";
return os.str();
}
int main(int argc, char* argv[])
{
if ((argc != 4) || (0 == atoi(argv[2])))
{
cout << "usage: sendmsg server_ip server_port source_filename" << endl;
return -1;
}
// Use this function to initialize the UDT library
srt_startup();
srt_setloglevel(srt_logging::LogLevel::debug);
struct addrinfo hints, *peer;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
SRTSOCKET fhandle = srt_create_socket();
// SRT requires that third argument is always SOCK_DGRAM. The Stream API is set by an option,
// although there's also lots of other options to be set, for which there's a convenience option,
// SRTO_TRANSTYPE.
SRT_TRANSTYPE tt = SRTT_FILE;
srt_setsockopt(fhandle, 0, SRTO_TRANSTYPE, &tt, sizeof tt);
bool message_mode = true;
srt_setsockopt(fhandle, 0, SRTO_MESSAGEAPI, &message_mode, sizeof message_mode);
if (0 != getaddrinfo(argv[1], argv[2], &hints, &peer))
{
cout << "incorrect server/peer address. " << argv[1] << ":" << argv[2] << endl;
return -1;
}
// Connect to the server, implicit bind.
if (SRT_ERROR == srt_connect(fhandle, peer->ai_addr, peer->ai_addrlen))
{
int rej = srt_getrejectreason(fhandle);
cout << "connect: " << srt_getlasterror_str() << ":" << srt_rejectreason_str(rej) << endl;
return -1;
}
freeaddrinfo(peer);
string source_fname = argv[3];
bool use_filelist = false;
if (source_fname[0] == '+')
{
use_filelist = true;
source_fname = source_fname.substr(1);
}
istream* pin;
ifstream fin;
if (source_fname == "-")
{
pin = &cin;
}
else
{
fin.open(source_fname.c_str());
pin = &fin;
}
// The syntax is:
//
// 1. If the first character is +, it's followed by TTL in milliseconds.
// 2. Otherwise the first number is the ID, followed by a space, to be filled in first 4 bytes.
// 3. Rest of the characters, up to the end of line, should be put into a solid block and sent at once.
int status = 0;
int ordinal = 1;
int lpos = 0;
for (;;)
{
string line;
int32_t id = 0;
int ttl = -1;
getline(*pin, (line));
if (pin->eof())
break;
// Interpret
if (line.size() < 2)
continue;
if (use_filelist)
{
// The line should contain [+TTL] FILENAME
char fname[1024] = "";
if (line[0] == '+')
{
int nparsed = sscanf(line.c_str(), "+%d %n%1000s", &ttl, &lpos, fname);
if (nparsed != 2)
{
cout << "ERROR: syntax error in input (" << nparsed << " parsed pos=" << lpos << ")\n";
status = SRT_ERROR;
break;
}
line = fname;
}
ifstream ifile (line);
id = ordinal;
++ordinal;
if (!ifile.good())
{
cout << "ERROR: file '" << line << "' cannot be read, skipping\n";
continue;
}
line = string(istreambuf_iterator<char>(ifile), istreambuf_iterator<char>());
}
else
{
int lpos2 = 0;
int nparsed = 0;
if (line[0] == '+')
{
nparsed = sscanf(line.c_str(), "+%d %d %n%*s", &ttl, &id, &lpos2);
if (nparsed != 2)
{
cout << "ERROR: syntax error in input (" << nparsed << " parsed pos=" << lpos2 << ")\n";
status = SRT_ERROR;
break;
}
}
else
{
nparsed = sscanf(line.c_str(), "%d %n%*s", &id, &lpos2);
if (nparsed != 1)
{
cout << "ERROR: syntax error in input (" << nparsed << " parsed pos=" << lpos2 << ")\n";
status = SRT_ERROR;
break;
}
}
}
union
{
char chars[4];
int32_t intval;
} first4;
first4.intval = htonl(id);
vector<char> input;
copy(first4.chars, first4.chars+4, back_inserter(input));
copy(line.begin() + lpos, line.end(), back_inserter(input));
// CHECK CODE
// cout << "WILL SEND: TTL=" << ttl << " ";
// transform(input.begin(), input.end(),
// ostream_iterator<string>(cout), ShowChar);
// cout << endl;
int nsnd = srt_sendmsg(fhandle, &input[0], input.size(), ttl, false);
if (nsnd == SRT_ERROR)
{
cout << "SRT ERROR: " << srt_getlasterror_str() << endl;
status = SRT_ERROR;
break;
}
}
srt_close(fhandle);
// Signal to the SRT library to clean up all allocated sockets and resources.
srt_cleanup();
return status;
}
|
