diff options
Diffstat (limited to 'optimize.c')
| -rw-r--r-- | optimize.c | 34 |
1 files changed, 33 insertions, 1 deletions
@@ -22,7 +22,7 @@ */ #ifndef lint static const char rcsid[] = - "@(#) $Header: /tcpdump/master/libpcap/optimize.c,v 1.64 2000-09-06 07:40:03 itojun Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/optimize.c,v 1.65 2000-10-28 00:01:27 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -36,6 +36,8 @@ static const char rcsid[] = #include <stdlib.h> #include <memory.h> +#include <errno.h> + #include "pcap-int.h" #include "gencode.h" @@ -2077,6 +2079,36 @@ icode_to_fcode(root, lenp) return fp; } +/* + * Make a copy of a BPF program and put it in the "fcode" member of + * a "pcap_t". + * + * If we fail to allocate memory for the copy, fill in the "errbuf" + * member of the "pcap_t" with an error message, and return -1; + * otherwise, return 0. + */ +int +install_bpf_program(pcap_t *p, struct bpf_program *fp) +{ + size_t prog_size; + + /* + * Free up any already installed program. + */ + pcap_freecode(&p->fcode); + + prog_size = sizeof(*fp->bf_insns) * fp->bf_len; + p->fcode.bf_len = fp->bf_len; + p->fcode.bf_insns = (struct bpf_insn *)malloc(prog_size); + if (p->fcode.bf_insns == NULL) { + snprintf(p->errbuf, sizeof(p->errbuf), + "malloc: %s", pcap_strerror(errno)); + return (-1); + } + memcpy(p->fcode.bf_insns, fp->bf_insns, prog_size); + return (0); +} + #ifdef BDEBUG static void opt_dump(root) |