bsd-ifaddrs.c File Reference

#include "uv.h"
#include "internal.h"
#include <errno.h>
#include <stddef.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <net/if_dl.h>

Go to the source code of this file.

Functions
static int	uv__ifaddr_exclude (struct ifaddrs *ent, int exclude_type)
int	uv_interface_addresses (uv_interface_address_t **addresses, int *count)
void	uv_free_interface_addresses (uv_interface_address_t *addresses, int count)

Function Documentation

uv__ifaddr_exclude()

static int uv__ifaddr_exclude ( struct ifaddrs *  ent, int  exclude_type  )

static

Definition at line 38 of file bsd-ifaddrs.c.

                                                                     {
  if (!((ent->ifa_flags & IFF_UP) && (ent->ifa_flags & IFF_RUNNING)))
    return 1;
  if (ent->ifa_addr == NULL)
    return 1;
#if !defined(__CYGWIN__) && !defined(__MSYS__)
  /*
   * If `exclude_type` is `UV__EXCLUDE_IFPHYS`, just see whether `sa_family`
   * equals to `AF_LINK` or not. Otherwise, the result depends on the operation
   * system with `AF_LINK` or `PF_INET`.
   */
  if (exclude_type == UV__EXCLUDE_IFPHYS)
    return (ent->ifa_addr->sa_family != AF_LINK);
#endif
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__DragonFly__) || \
    defined(__HAIKU__)
  /*
   * On BSD getifaddrs returns information related to the raw underlying
   * devices.  We're not interested in this information.
   */
  if (ent->ifa_addr->sa_family == AF_LINK)
    return 1;
#elif defined(__NetBSD__) || defined(__OpenBSD__)
  if (ent->ifa_addr->sa_family != PF_INET &&
      ent->ifa_addr->sa_family != PF_INET6)
    return 1;
#endif
  return 0;
}

References ifaddrs::ifa_addr, ifaddrs::ifa_flags, NULL, PF_INET, and UV__EXCLUDE_IFPHYS.

Referenced by uv_interface_addresses().

uv_free_interface_addresses()

void uv_free_interface_addresses	(	uv_interface_address_t *	addresses,
		int	count
	)

Definition at line 154 of file bsd-ifaddrs.c.

                                            {
  int i;
 
  for (i = 0; i < count; i++) {
    uv__free(addresses[i].name);
  }
 
  uv__free(addresses);
}

References count, i, and uv__free().

uv_interface_addresses()

int uv_interface_addresses	(	uv_interface_address_t **	addresses,
		int *	count
	)

Definition at line 68 of file bsd-ifaddrs.c.

                                                                           {
  struct ifaddrs* addrs;
  struct ifaddrs* ent;
  uv_interface_address_t* address;
#if !(defined(__CYGWIN__) || defined(__MSYS__))
  int i;
#endif
 
  *count = 0;
  *addresses = NULL;
 
  if (getifaddrs(&addrs) != 0)
    return UV__ERR(errno);
 
  /* Count the number of interfaces */
  for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
    if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
      continue;
    (*count)++;
  }
 
  if (*count == 0) {
    freeifaddrs(addrs);
    return 0;
  }
 
  /* Make sure the memory is initiallized to zero using calloc() */
  *addresses = uv__calloc(*count, sizeof(**addresses));
 
  if (*addresses == NULL) {
    freeifaddrs(addrs);
    return UV_ENOMEM;
  }
 
  address = *addresses;
 
  for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
    if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
      continue;
 
    address->name = uv__strdup(ent->ifa_name);
 
    if (ent->ifa_addr->sa_family == AF_INET6) {
      address->address.address6 = *((struct sockaddr_in6*) ent->ifa_addr);
    } else {
      address->address.address4 = *((struct sockaddr_in*) ent->ifa_addr);
    }
 
    if (ent->ifa_netmask == NULL) {
      memset(&address->netmask, 0, sizeof(address->netmask));
    } else if (ent->ifa_netmask->sa_family == AF_INET6) {
      address->netmask.netmask6 = *((struct sockaddr_in6*) ent->ifa_netmask);
    } else {
      address->netmask.netmask4 = *((struct sockaddr_in*) ent->ifa_netmask);
    }
 
    address->is_internal = !!(ent->ifa_flags & IFF_LOOPBACK);
 
    address++;
  }
 
#if !(defined(__CYGWIN__) || defined(__MSYS__))
  /* Fill in physical addresses for each interface */
  for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
    if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFPHYS))
      continue;
 
    address = *addresses;
 
    for (i = 0; i < *count; i++) {
      if (strcmp(address->name, ent->ifa_name) == 0) {
        struct sockaddr_dl* sa_addr;
        sa_addr = (struct sockaddr_dl*)(ent->ifa_addr);
        memcpy(address->phys_addr, LLADDR(sa_addr), sizeof(address->phys_addr));
      }
      address++;
    }
  }
#endif
 
  freeifaddrs(addrs);
 
  return 0;
}

References uv_interface_address_s::address, uv_interface_address_s::address4, uv_interface_address_s::address6, AF_INET6, count, freeifaddrs(), getifaddrs(), i, ifaddrs::ifa_addr, ifaddrs::ifa_flags, ifaddrs::ifa_name, ifaddrs::ifa_netmask, ifaddrs::ifa_next, uv_interface_address_s::is_internal, memcpy(), memset(), uv_interface_address_s::name, uv_interface_address_s::netmask, uv_interface_address_s::netmask4, uv_interface_address_s::netmask6, NULL, uv_interface_address_s::phys_addr, uv__calloc(), UV__ERR, UV__EXCLUDE_IFADDR, UV__EXCLUDE_IFPHYS, uv__ifaddr_exclude(), and uv__strdup().