The ovm_ipv4_t type

The ovm_ipv4_t type is the OrchIDS type of IPv4 addresses.

It is defined this way in src/lang.h:

typedef struct ovm_ipv4_s ovm_ipv4_t;
struct ovm_ipv4_s
  gc_header_t gc;
  struct in_addr ipv4addr;

This is a type of garbage-collectable data. To allocate a new object of type ovm_ipv4_t, use the function:

ovm_var_t *ovm_ipv4_new(gc_t *gc_ctx);

This creates a new uninitialized ovm_ipv4_t object. Its return type is the universal type ovm_var_t instead of ovm_ipv4_t, for practical reasons. Calling res the result, one always has TYPE(res)==T_IPV4.

The result is created white, and much be gc_touch()ed before storing it into a garbage-collectable object.

The returned ovm_ipv4_t object res is modifiable. One can read from or write from it by using the IPV4() macro (e.g., in_addr_t addr=IPV4(res).s_addr; IPV4(res).s_addr = addr;).