https://github.com/reddec/notify
Multicast notification library on C
https://github.com/reddec/notify
Last synced: over 1 year ago
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Multicast notification library on C
- Host: GitHub
- URL: https://github.com/reddec/notify
- Owner: reddec
- License: mit
- Created: 2015-07-11T19:05:01.000Z (almost 11 years ago)
- Default Branch: master
- Last Pushed: 2015-07-12T10:19:22.000Z (almost 11 years ago)
- Last Synced: 2025-03-09T00:06:40.015Z (over 1 year ago)
- Language: C++
- Size: 289 KB
- Stars: 0
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# notify
Multicast notification library on C
See full documentation in doc/html or by `man notify.h`.
Example (in examples/example.cpp):
Send notification
```C
// Allocate buffer for `title` field
char title[__NOTIFY_MAX_TITLE_LEN];
// Allocate buffer for `format` field
char format[__NOTIFY_MAX_FORMAT_LEN];
// Allocate buffer for `payload
char data[__NOTIFY_MAX_DATA_LEN];
std::cout << "Format: ";
// Read `format` from stdin (console input)
std::cin >> format;
std::cout << "Title: ";
// Read `title` from stdin (console input)
std::cin >> title;
std::cout << "Data: ";
// Read payload from stdin (console input)
std::cin >> data;
// Create UDP socket
int sender = socket(AF_INET, SOCK_DGRAM, 0);
notify_setup_emitter(sender, 0, 19999);
// Send notification (as text)
ssize_t bytes = notify_text(sender, format, title, data);
std::clog << "Sent " << bytes << " bytes" << std::endl;
// Close socket
close(sender);
```
Receive notification
```C
// Allocate buffer for packet
char buffer[__NOTIFY_PACKET_LIMIT];
ssize_t pack_size;
// Set timeout (5 seconds)
size_t tm_ms = 5000;
// Create UDP socket
int listener = socket(AF_INET, SOCK_DGRAM, 0);
// Prepare socket
notify_setup_listener(listener, 0, 19999);
// Read one by one packet till timeout exception or internal socket error
while ((pack_size = notify_collect(listener, tm_ms, buffer, sizeof(buffer))) > 0) {
std::cout << "Packet size: " << pack_size << std::endl;
// Parse packet to structure
notify_packet_t pp = notify_parse_packet(buffer, pack_size);
std::cout << "Format: ";
// Check field `format`. If packet not contains this filed (or it has incorrect end symbol), it will be NULL
if (pp.format != NULL)
std::cout << pp.format << std::endl;
else
std::cout << "" << std::endl;
std::cout << "Title: ";
// Check field `title`. If packet not contains this filed (or it has incorrect end symbol), it will be NULL
if (pp.title != NULL)
std::cout << pp.title << std::endl;
else
std::cout << "" << std::endl;
std::cout << "Data (" << pp.data_size << " bytes): ";
std::cout.write(pp.data, pp.data_size);
std::cout << std::endl;
}
// Close socket
close(listener);
```