pcap: update to version 1.0.0, add extension for changing the desired protocol for the internal raw socket (useful for reducing the cpu overhead of capture)

SVN-Revision: 15398

package/libpcap/patches/105-space_optimization.patch

@@ -1,6 +1,6 @@
 --- a/gencode.c
 +++ b/gencode.c
-@@ -429,20 +429,6 @@ pcap_compile_nopcap(int snaplen_arg, int
+@@ -439,20 +439,6 @@ pcap_compile_nopcap(int snaplen_arg, int
  }
  
  /*
@@ -21,9 +21,71 @@
   * Backpatch the blocks in 'list' to 'target'.  The 'sense' field indicates
   * which of the jt and jf fields has been resolved and which is a pointer
   * back to another unresolved block (or nil).  At least one of the fields
+--- a/pcap.c
++++ b/pcap.c
+@@ -698,6 +698,59 @@ static const u_char charmap[] = {
+ 	(u_char)'\374', (u_char)'\375', (u_char)'\376', (u_char)'\377',
+ };
+ 
++/*
++ * Clean up a "struct bpf_program" by freeing all the memory allocated
++ * in it.
++ */
++void
++pcap_freecode(struct bpf_program *program)
++{
++	program->bf_len = 0;
++	if (program->bf_insns != NULL) {
++		free((char *)program->bf_insns);
++		program->bf_insns = NULL;
++	}
++}
++
++/*
++ * 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;
++
++	/*
++	 * Validate the program.
++	 */
++	if (!bpf_validate(fp->bf_insns, fp->bf_len)) {
++		snprintf(p->errbuf, sizeof(p->errbuf),
++			"BPF program is not valid");
++		return (-1);
++	}
++
++	/*
++	 * 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);
++}
++
+ int
+ pcap_strcasecmp(const char *s1, const char *s2)
+ {
 --- a/optimize.c
 +++ b/optimize.c
-@@ -2263,36 +2263,6 @@ icode_to_fcode(root, lenp)
+@@ -2278,45 +2278,6 @@ icode_to_fcode(root, lenp)
  	return fp;
  }
  
@@ -41,6 +103,15 @@
 -	size_t prog_size;
 -
 -	/*
+-	 * Validate the program.
+-	 */
+-	if (!bpf_validate(fp->bf_insns, fp->bf_len)) {
+-		snprintf(p->errbuf, sizeof(p->errbuf),
+-			"BPF program is not valid");
+-		return (-1);
+-	}
+-
+-	/*
 -	 * Free up any already installed program.
 -	 */
 -	pcap_freecode(&p->fcode);
@@ -60,58 +131,3 @@
  #ifdef BDEBUG
  static void
  opt_dump(root)
---- a/pcap.c
-+++ b/pcap.c
-@@ -463,6 +463,52 @@ static const u_char charmap[] = {
- 	(u_char)'\374', (u_char)'\375', (u_char)'\376', (u_char)'\377',
- };
- 
-+/*
-+ * Clean up a "struct bpf_program" by freeing all the memory allocated
-+ * in it.
-+ */
-+void
-+pcap_freecode(struct bpf_program *program)
-+{
-+	program->bf_len = 0;
-+	if (program->bf_insns != NULL) {
-+		free((char *)program->bf_insns);
-+		program->bf_insns = NULL;
-+	}
-+}
-+
-+
-+/*
-+ * 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);
-+}
-+
-+
- int
- pcap_strcasecmp(const char *s1, const char *s2)
- {