diff options
Diffstat (limited to 'pcap-nit.c')
| -rw-r--r-- | pcap-nit.c | 32 |
1 files changed, 31 insertions, 1 deletions
@@ -20,7 +20,7 @@ */ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/pcap-nit.c,v 1.55 2004-03-21 08:32:05 guy Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/pcap-nit.c,v 1.56 2004-03-23 19:18:06 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; @@ -226,6 +243,8 @@ pcap_close_nit(pcap_t *p) { if (p->buffer != NULL) free(p->buffer); + if (p->device != NULL) + free(p->device); if (p->fd >= 0) close(p->fd); } @@ -281,6 +300,16 @@ 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; @@ -306,6 +335,7 @@ pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, } 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; |