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update the bcast example to broadcast on all available ipv4 interfaces 

to detect nfs servers on the locally attached networks
libnfs-4.0.0-vitalif
Ronnie Sahlberg 2011-07-02 09:33:26 +10:00
parent 28f7bd6696
commit 92e787feac
1 changed files with 59 additions and 16 deletions
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75
examples/nfsclient-bcast.c
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@ -25,6 +25,8 @@
#include <poll.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netdb.h>
#include "libnfs.h"
#include "libnfs-raw.h"
@ -61,6 +63,8 @@ int main(int argc _U_, char *argv[] _U_)
{
struct rpc_context *rpc;
struct pollfd pfd;
struct ifconf ifc;
int i, size;
rpc = rpc_init_udp_context();
if (rpc == NULL) {
@ -73,24 +77,63 @@ int main(int argc _U_, char *argv[] _U_)
exit(10);
}
if (rpc_set_udp_destination(rpc, "10.1.1.255", 111, 1) < 0) {
printf("failed to set udp destination %s\n", rpc_get_error(rpc));
exit(10);
}
if (rpc_pmap_callit_async(rpc, 100005, 2, 0, NULL, 0, pm_cb, NULL) < 0) {
printf("Failed to set up callit function\n");
exit(10);
}
if (rpc_set_udp_destination(rpc, "10.9.2.255", 111, 1) < 0) {
printf("failed to set udp destination %s\n", rpc_get_error(rpc));
exit(10);
}
/* get list of all interfaces */
size = sizeof(struct ifreq);
ifc.ifc_buf = NULL;
ifc.ifc_len = size;
if (rpc_pmap_callit_async(rpc, 100005, 2, 0, NULL, 0, pm_cb, NULL) < 0) {
printf("Failed to set up callit function\n");
exit(10);
while (ifc.ifc_len == size) {
size *= 2;
free(ifc.ifc_buf);
ifc.ifc_len = size;
ifc.ifc_buf = malloc(size);
if (ioctl(rpc_get_fd(rpc), SIOCGIFCONF, (caddr_t)&ifc) < 0) {
printf("ioctl SIOCGIFCONF failed\n");
exit(10);
}
}
for (i=0; i<ifc.ifc_len / sizeof(struct ifconf); i++) {
char bcdd[16];
if (ifc.ifc_req[i].ifr_addr.sa_family != AF_INET) {
continue;
}
if (ioctl(rpc_get_fd(rpc), SIOCGIFFLAGS, &ifc.ifc_req[i]) < 0) {
printf("ioctl DRBADDR failed\n");
exit(10);
}
if (!(ifc.ifc_req[i].ifr_flags & IFF_UP)) {
continue;
}
if (ifc.ifc_req[i].ifr_flags & IFF_LOOPBACK) {
continue;
}
if (!(ifc.ifc_req[i].ifr_flags & IFF_BROADCAST)) {
continue;
}
if (ioctl(rpc_get_fd(rpc), SIOCGIFBRDADDR, &ifc.ifc_req[i]) < 0) {
printf("ioctl DRBADDR failed\n");
exit(10);
}
if (getnameinfo(&ifc.ifc_req[i].ifr_broadaddr, sizeof(struct sockaddr_in), &bcdd[0], sizeof(bcdd), NULL, 0, NI_NUMERICHOST) < 0) {
printf("getnameinfo failed\n");
exit(10);
}
if (rpc_set_udp_destination(rpc, bcdd, 111, 1) < 0) {
printf("failed to set udp destination %s\n", rpc_get_error(rpc));
exit(10);
}
if (rpc_pmap_callit_async(rpc, MOUNT_PROGRAM, 2, 0, NULL, 0, pm_cb, NULL) < 0) {
printf("Failed to set up callit function\n");
exit(10);
}
}
free(ifc.ifc_buf);
alarm(3);
@ -107,7 +150,7 @@ int main(int argc _U_, char *argv[] _U_)
break;
}
}
rpc_destroy_context(rpc);
rpc=NULL;
printf("nfsclient finished\n");