static void test_get_addresses(sd_rtnl *rtnl) { _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL; sd_rtnl_message *m; assert_se(sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC) >= 0); assert_se(sd_rtnl_call(rtnl, req, 0, &reply) >= 0); for (m = reply; m; m = sd_rtnl_message_next(m)) { uint16_t type; unsigned char scope, flags; int family, ifindex; assert_se(sd_rtnl_message_get_type(m, &type) >= 0); assert_se(type == RTM_NEWADDR); assert_se(sd_rtnl_message_addr_get_ifindex(m, &ifindex) >= 0); assert_se(sd_rtnl_message_addr_get_family(m, &family) >= 0); assert_se(sd_rtnl_message_addr_get_scope(m, &scope) >= 0); assert_se(sd_rtnl_message_addr_get_flags(m, &flags) >= 0); assert_se(ifindex > 0); assert_se(family == AF_INET || family == AF_INET6); log_info("got IPv%u address on ifindex %i", family == AF_INET ? 4: 6, ifindex); } }
int local_addresses(sd_netlink *context, int ifindex, int af, struct local_address **ret) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; _cleanup_free_ struct local_address *list = NULL; size_t n_list = 0, n_allocated = 0; sd_netlink_message *m; int r; assert(ret); if (context) rtnl = sd_netlink_ref(context); else { r = sd_netlink_open(&rtnl); if (r < 0) return r; } r = sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, af); if (r < 0) return r; r = sd_netlink_call(rtnl, req, 0, &reply); if (r < 0) return r; for (m = reply; m; m = sd_netlink_message_next(m)) { struct local_address *a; unsigned char flags; uint16_t type; int ifi, family; r = sd_netlink_message_get_errno(m); if (r < 0) return r; r = sd_netlink_message_get_type(m, &type); if (r < 0) return r; if (type != RTM_NEWADDR) continue; r = sd_rtnl_message_addr_get_ifindex(m, &ifi); if (r < 0) return r; if (ifindex > 0 && ifi != ifindex) continue; r = sd_rtnl_message_addr_get_family(m, &family); if (r < 0) return r; if (af != AF_UNSPEC && af != family) continue; r = sd_rtnl_message_addr_get_flags(m, &flags); if (r < 0) return r; if (flags & IFA_F_DEPRECATED) continue; if (!GREEDY_REALLOC0(list, n_allocated, n_list+1)) return -ENOMEM; a = list + n_list; r = sd_rtnl_message_addr_get_scope(m, &a->scope); if (r < 0) return r; if (ifindex == 0 && IN_SET(a->scope, RT_SCOPE_HOST, RT_SCOPE_NOWHERE)) continue; switch (family) { case AF_INET: r = sd_netlink_message_read_in_addr(m, IFA_LOCAL, &a->address.in); if (r < 0) { r = sd_netlink_message_read_in_addr(m, IFA_ADDRESS, &a->address.in); if (r < 0) continue; } break; case AF_INET6: r = sd_netlink_message_read_in6_addr(m, IFA_LOCAL, &a->address.in6); if (r < 0) { r = sd_netlink_message_read_in6_addr(m, IFA_ADDRESS, &a->address.in6); if (r < 0) continue; } break; default: continue; } a->ifindex = ifi; a->family = family; n_list++; }; qsort_safe(list, n_list, sizeof(struct local_address), address_compare); *ret = TAKE_PTR(list); return (int) n_list; }