1 files changed, 53 insertions, 0 deletions
diff --git a/sbin/ipf/libipf/parsefields.c b/sbin/ipf/libipf/parsefields.c
new file mode 100644
index 000000000000..93c3601c9557
--- /dev/null
+++ b/sbin/ipf/libipf/parsefields.c
@@ -0,0 +1,53 @@
+#include "ipf.h"
+#include <err.h>
+
+extern int nohdrfields;
+
+wordtab_t *parsefields(table, arg)
+	wordtab_t *table;
+	char *arg;
+{
+	wordtab_t *f, *fields;
+	char *s, *t;
+	int num;
+
+	fields = NULL;
+	num = 0;
+
+	for (s = strtok(arg, ","); s != NULL; s = strtok(NULL, ",")) {
+		t = strchr(s, '=');
+		if (t != NULL) {
+			*t++ = '\0';
+			if (*t == '\0')
+				nohdrfields = 1;
+		}
+
+		f = findword(table, s);
+		if (f == NULL) {
+			fprintf(stderr, "Unknown field '%s'\n", s);
+			exit(1);
+		}
+
+		num++;
+		if (fields == NULL) {
+			fields = malloc(2 * sizeof(*fields));
+		} else {
+			fields = reallocarray(fields, num + 1, sizeof(*fields));
+			if (fields == NULL) {
+				warnx("memory allocation error at %d in %s in %s", __LINE__, __FUNCTION__, __FILE__);
+				abort();
+			}
+		}
+
+		if (t == NULL) {
+			fields[num - 1].w_word = f->w_word;
+		} else {
+			fields[num - 1].w_word = t;
+		}
+		fields[num - 1].w_value = f->w_value;
+		fields[num].w_word = NULL;
+		fields[num].w_value = 0;
+	}
+
+	return fields;
+}