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webserver: autodetect device name

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This commit is contained in:
Vince Weaver 2016-11-20 00:15:43 -05:00
parent 5cab4ef193
commit 59324ef0f8
2 changed files with 9 additions and 2 deletions
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1
webserver/Makefile
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@ -1,5 +1,6 @@
CC = gcc CC = gcc
CFLAGS = -Wall -O2 CFLAGS = -Wall -O2
LFLAGS =-lpcap
all: testarp all: testarp

10
webserver/testarp.c
View File

@ -3,9 +3,15 @@
int main(int argc, char **argv) { int main(int argc, char **argv) {
char device[]="wlan0"; char *device_name,errbuf[PCAP_ERRBUF_SIZE];
printf("Using device: %s\n", device); device_name=pcap_lookupdev(errbuf);
if (device_name==NULL) {
fprintf(stderr,"Can't find default device\n");
return -1;
}
printf("Using device: %s\n", device_name);
return 0; return 0;