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authordieter kovacic <d13@users.sourceforge.net>2002-07-09 12:41:56 +0000
committerdieter kovacic <d13@users.sourceforge.net>2002-07-09 12:41:56 +0000
commit7312e58d17e331d71d4f47e21bf15499609bace8 (patch)
tree23e7fba2466041f82bc29ce4adf5e7ac35d2d508 /promiscous~.c
This commit was generated by cvs2svn to compensate for changes in r33,svn2git-root
which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/ext13/; revision=34
Diffstat (limited to 'promiscous~.c')
-rw-r--r--promiscous~.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/promiscous~.c b/promiscous~.c
new file mode 100644
index 0000000..1075eb7
--- /dev/null
+++ b/promiscous~.c
@@ -0,0 +1,126 @@
+#include "m_pd.h"
+#include "ext13.h"
+#include <sys/types.h>
+#include <string.h>
+#include <sys/errno.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip.h>
+#include <netdb.h>
+
+
+
+/* ------------------------ promiscous_tilde~ ----------------------------- */
+
+
+#define DEFAULT_NIC "eth0" //NIC
+
+static t_class *promiscous_tilde_class;
+
+
+typedef struct _promiscous_tilde
+{
+ t_object x_obj;
+ int opened;
+ int sock;
+ char* cbuf;
+ t_symbol* interface;
+} t_promiscous_tilde;
+
+
+static int setnic_promisc(char *nic_name){
+ int sock; // socket desc
+ struct ifreq f;
+
+ if( (sock = socket(AF_INET, SOCK_PACKET, htons(ETH_P_ALL))) < 0){
+ post("promiscous~ failed open socket, must be root (euid)");
+ return(-1);
+ }
+ strcpy(f.ifr_name, nic_name);
+ if( ioctl(sock, SIOCGIFFLAGS, &f) < 0) {
+ post("promisous~ failed to get interface flags, continue anyway");
+ return(sock);
+ }
+ f.ifr_flags |= IFF_PROMISC;
+ if( ioctl(sock, SIOCSIFFLAGS, &f) < 0) {
+ post("promiscous~ failed to set promisous mode , continue anyway");
+ }
+ return(sock);
+}
+
+
+t_int *promiscous_tilde_perform(t_int *w)
+{
+ t_promiscous_tilde* x = (t_promiscous_tilde*)(w[1]);
+ int n = (int)(w[3]);/*number of samples*/
+ int l = 0;
+ int ll = 0;
+ int r;
+ static unsigned char packet;
+ fd_set fdset;
+ struct timeval timeout;
+ t_float* out = (t_float *)w[2];
+ int cptr[n];
+
+ if (x->opened){
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 0;
+ FD_ZERO(&fdset);
+ FD_SET(x->sock,&fdset);
+ if (r = select(x->sock+1,&fdset,NULL,NULL,&timeout) && x->sock){
+ /* l = recv(x->sock, &cptr,n, 0);*/
+ l = read(x->sock, (char*) &cptr,n);
+ };
+ if (l < 0) l = 0;
+ while (l--){
+ *out++ = cptr[n-l] / 32767.;
+ ll++;
+ }
+ }
+ while (ll < n){
+ *out++ = 0.;
+ ll++;
+ }
+ return (w + 4);
+}
+
+static void promiscous_tilde_dsp(t_promiscous_tilde *x, t_signal **sp)
+{
+ dsp_add(promiscous_tilde_perform, 3, x, sp[0]->s_vec,
+ sp[0]->s_n);
+}
+
+
+static void promiscous_tilde_free(t_promiscous_tilde *x){
+ /*LATER*/
+}
+
+
+static void *promiscous_tilde_new()
+{
+ t_promiscous_tilde *x = (t_promiscous_tilde *)pd_new(promiscous_tilde_class);
+ outlet_new(&x->x_obj, gensym("signal"));
+
+ x->interface = gensym("eth0");
+
+ if((x->sock = setnic_promisc(x->interface->s_name))<0){
+ post ("could not open interface");
+ x->opened = 0;
+ }else{
+ x->opened = 1;
+ }
+ return (x);
+}
+
+
+void promiscous_tilde_setup(void)
+{
+ promiscous_tilde_class = class_new(gensym("promiscous~"), (t_newmethod) promiscous_tilde_new, 0,
+ sizeof(t_promiscous_tilde), CLASS_NOINLET, 0);
+ class_addmethod(promiscous_tilde_class, (t_method) promiscous_tilde_dsp, gensym("dsp"), 0);
+}