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Mongoose broadcast listener unix

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1

Im trying to listen broadcast udp messages using cesanta mongoose in C/C++.

mgr = new mg_mgr();
struct ip_mreq group;

mg_mgr_init(mgr, this);

 char listen[256];
 snprintf(listen, sizeof(listen), "udp://%d", _port);
 nc = mg_bind(mgr, listen, ev_handler);


if (nc == NULL)

 strerror(errno);
 return errno;


group.imr_multiaddr.s_addr = inet_addr("0.0.0.0");
group.imr_interface.s_addr = inet_addr(INADDR_ANY);
if (setsockopt(nc->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group)) < 0)

 strerror(errno);
 return errno;

while(true)
mg_mgr_poll(mgr, 0);

It works fine on windows, and I'm able to catch the messages.
BUT it fails on linux (Debian) on the setsockopt with error 22 (invalid argument).

I thought the mongoose library was crossplatform, is there something I might be missing here?
I read that the option IP_ADD_MEMBERSHIP might give problems, but I don't know how should I set the socket options to receive the broadcast.

c linux mongoose udp broadcasting

share|improve this question

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621

add a comment | 

1

Im trying to listen broadcast udp messages using cesanta mongoose in C/C++.

mgr = new mg_mgr();
struct ip_mreq group;

mg_mgr_init(mgr, this);

 char listen[256];
 snprintf(listen, sizeof(listen), "udp://%d", _port);
 nc = mg_bind(mgr, listen, ev_handler);


if (nc == NULL)

 strerror(errno);
 return errno;


group.imr_multiaddr.s_addr = inet_addr("0.0.0.0");
group.imr_interface.s_addr = inet_addr(INADDR_ANY);
if (setsockopt(nc->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group)) < 0)

 strerror(errno);
 return errno;

while(true)
mg_mgr_poll(mgr, 0);

It works fine on windows, and I'm able to catch the messages.
BUT it fails on linux (Debian) on the setsockopt with error 22 (invalid argument).

I thought the mongoose library was crossplatform, is there something I might be missing here?
I read that the option IP_ADD_MEMBERSHIP might give problems, but I don't know how should I set the socket options to receive the broadcast.

c linux mongoose udp broadcasting

share|improve this question

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621

add a comment | 

Im trying to listen broadcast udp messages using cesanta mongoose in C/C++.

mgr = new mg_mgr();
struct ip_mreq group;

mg_mgr_init(mgr, this);

 char listen[256];
 snprintf(listen, sizeof(listen), "udp://%d", _port);
 nc = mg_bind(mgr, listen, ev_handler);


if (nc == NULL)

 strerror(errno);
 return errno;


group.imr_multiaddr.s_addr = inet_addr("0.0.0.0");
group.imr_interface.s_addr = inet_addr(INADDR_ANY);
if (setsockopt(nc->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group)) < 0)

 strerror(errno);
 return errno;

while(true)
mg_mgr_poll(mgr, 0);

It works fine on windows, and I'm able to catch the messages.
BUT it fails on linux (Debian) on the setsockopt with error 22 (invalid argument).

I thought the mongoose library was crossplatform, is there something I might be missing here?
I read that the option IP_ADD_MEMBERSHIP might give problems, but I don't know how should I set the socket options to receive the broadcast.

c linux mongoose udp broadcasting

share|improve this question

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621

mgr = new mg_mgr();
struct ip_mreq group;

mg_mgr_init(mgr, this);

 char listen[256];
 snprintf(listen, sizeof(listen), "udp://%d", _port);
 nc = mg_bind(mgr, listen, ev_handler);


if (nc == NULL)

 strerror(errno);
 return errno;


group.imr_multiaddr.s_addr = inet_addr("0.0.0.0");
group.imr_interface.s_addr = inet_addr(INADDR_ANY);
if (setsockopt(nc->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group)) < 0)

 strerror(errno);
 return errno;

while(true)
mg_mgr_poll(mgr, 0);

share|improve this question

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621

share|improve this question

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621

asked Mar 21 at 14:53

diego.martinezdiego.martinez

8832621