diff options
Diffstat (limited to 'src/socket.c')
-rw-r--r-- | src/socket.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/socket.c b/src/socket.c index 0c3cd72..86657d4 100644 --- a/src/socket.c +++ b/src/socket.c @@ -129,6 +129,40 @@ struct mnl_socket *mnl_socket_open(int bus) EXPORT_SYMBOL(mnl_socket_open); /** + * mnl_socket_fdopen - associates a mnl_socket object with pre-existing socket. + * \param fd pre-existing socket descriptor. + * + * On error, it returns NULL and errno is appropriately set. Otherwise, it + * returns a valid pointer to the mnl_socket structure. It also sets the portID + * if the socket fd is already bound and it is AF_NETLINK. + * + * Note that mnl_socket_get_portid() returns 0 if this function is used with + * non-netlink socket. + */ +struct mnl_socket *mnl_socket_fdopen(int fd) +{ + int ret; + struct mnl_socket *nl; + struct sockaddr_nl addr; + socklen_t addr_len = sizeof(struct sockaddr_nl); + + ret = getsockname(fd, (struct sockaddr *) &addr, &addr_len); + if (ret == -1) + return NULL; + + nl = calloc(1, sizeof(struct mnl_socket)); + if (nl == NULL) + return NULL; + + nl->fd = fd; + if (addr.nl_family == AF_NETLINK) + nl->addr = addr; + + return nl; +} +EXPORT_SYMBOL(mnl_socket_fdopen); + +/** * mnl_socket_bind - bind netlink socket * \param nl netlink socket obtained via mnl_socket_open() * \param groups the group of message you're interested in |