diff options
Diffstat (limited to 'contrib/libpcap/pcap-nit.c')
| -rw-r--r-- | contrib/libpcap/pcap-nit.c | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/contrib/libpcap/pcap-nit.c b/contrib/libpcap/pcap-nit.c index 86aad0f..097c3be 100644 --- a/contrib/libpcap/pcap-nit.c +++ b/contrib/libpcap/pcap-nit.c @@ -20,7 +20,7 @@ */ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/pcap-nit.c,v 1.50.2.4 2004/03/21 08:33:23 guy Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/pcap-nit.c,v 1.57 2004/10/19 07:06:13 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -193,6 +193,23 @@ pcap_read_nit(pcap_t *p, int cnt, pcap_handler callback, u_char *user) } static int +pcap_inject_nit(pcap_t *p, const void *buf, size_t size) +{ + struct sockaddr sa; + int ret; + + memset(&sa, 0, sizeof(sa)); + strncpy(sa.sa_data, device, sizeof(sa.sa_data)); + ret = sendto(p->fd, buf, size, 0, &sa, sizeof(sa)); + if (ret == -1) { + snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send: %s", + pcap_strerror(errno)); + return (-1); + } + return (ret); +} + +static int nit_setflags(int fd, int promisc, int to_ms, char *ebuf) { struct nit_ioc nioc; @@ -224,10 +241,9 @@ nit_setflags(int fd, int promisc, int to_ms, char *ebuf) static void pcap_close_nit(pcap_t *p) { - if (p->buffer != NULL) - free(p->buffer); - if (p->fd >= 0) - close(p->fd); + pcap_close_common(p); + if (p->device != NULL) + free(p->device); } pcap_t * @@ -281,11 +297,42 @@ pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, } /* + * We need the device name in order to send packets. + */ + p->device = strdup(device); + if (p->device == NULL) { + strlcpy(ebuf, pcap_strerror(errno), PCAP_ERRBUF_SIZE); + free(p->buffer); + goto bad; + } + + /* * "p->fd" is a socket, so "select()" should work on it. */ p->selectable_fd = p->fd; + /* + * This is (presumably) a real Ethernet capture; give it a + * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so + * that an application can let you choose it, in case you're + * capturing DOCSIS traffic that a Cisco Cable Modem + * Termination System is putting out onto an Ethernet (it + * doesn't put an Ethernet header onto the wire, it puts raw + * DOCSIS frames out on the wire inside the low-level + * Ethernet framing). + */ + p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2); + /* + * If that fails, just leave the list empty. + */ + if (p->dlt_list != NULL) { + p->dlt_list[0] = DLT_EN10MB; + p->dlt_list[1] = DLT_DOCSIS; + p->dlt_count = 2; + } + p->read_op = pcap_read_nit; + p->inject_op = pcap_inject_nit; p->setfilter_op = install_bpf_program; /* no kernel filtering */ p->set_datalink_op = NULL; /* can't change data link type */ p->getnonblock_op = pcap_getnonblock_fd; |
