StarMirror/toxcore
1
0
Fork 0
mirror of https://github.com/irungentoo/toxcore.git synced 2024-03-22 13:30:51 +08:00
Code Issues Projects Releases Wiki Activity

redid get_broadcast(), looks like it should work now

Browse Source
This commit is contained in:
charmlesscoin 2013-08-01 16:25:22 -04:00
parent 75daa1aec9
commit 8a0800da4e
2 changed files with 70 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
core/LAN_discovery.c
View File

@ -23,13 +23,74 @@
#include "LAN_discovery.h"
#define MAX_INTERFACES 16
#define ERR_IOCTL 0
/*Return the broadcast ip
TODO: make it return the real one, not the 255.255.255.255 one.*/
#ifdef __linux
uint32_t get_broadcast(void)
{
/* not sure how many platforms this will
* run on, so it's wrapped in __linux for now */
struct ifconf ifconf;
struct ifreq i_faces[MAX_INTERFACES];
int count = 0;
int sock = 0;
int i = 0;
struct sockaddr_in *sock_holder = NULL;
struct in_addr result;
/* configure ifconf for the ioctl call */
sock = socket(AF_INET, SOCK_STREAM, 0);
memset(i_faces, 0, sizeof(struct ifreq) * MAX_INTERFACES);
ifconf.ifc_buf = (char *)i_faces;
ifconf.ifc_len = sizeof(i_faces);
count = ifconf.ifc_len / sizeof(struct ifreq);
if(ioctl(sock, SIOCGIFCONF, &ifconf) < 0) {
perror("get_broadcast: ioctl() error");
return ERR_IOCTL;
}
fprintf(stderr, "count: %d\n", count);
for(i = 0; i < count; i++) {
/* skip the loopback interface, as it's useless */
if(strcmp(i_faces[i].ifr_name, "lo") != 0) {
fprintf(stderr, "device name: %s\n", i_faces[i].ifr_name);
if(ioctl(sock, SIOCGIFBRDADDR, &i_faces[i]) < 0) {
perror("[!] get_broadcast: ioctl error");
return ERR_IOCTL;
}
/* just to clarify where we're getting the values from */
sock_holder = (struct sockaddr_in *)&i_faces[i].ifr_broadaddr;
break;
}
}
close(sock);
char test[INET_ADDRSTRLEN];
result.s_addr = sock_holder->sin_addr.s_addr;
inet_ntop(AF_INET, &result, test, INET_ADDRSTRLEN);
fputs(test, stderr);
getchar();
return sock_holder->sin_addr.s_addr;
}
#endif
/* Return the broadcast ip */
IP broadcast_ip()
{
IP ip;
#ifdef __linux
ip.i = get_broadcast();
if(ip.i == ERR_IOCTL)
/* ioctl errored, but try anyway? */
ip.i = ~0;
#else
ip.i = ~0;
#endif
return ip;
}

7
core/LAN_discovery.h
View File

@ -28,6 +28,13 @@
#include "DHT.h"
/* used for get_broadcast() */
#ifdef __linux
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <linux/netdevice.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif