Repository : ssh://git@diktynna/batctl
On branch : master
commit 49355f2f52e62691c112cc573cefab9c3b4527e3 Author: Sven Eckelmann sven@narfation.org Date: Mon May 10 19:18:25 2021 +0200
batctl: Get meshif info using shared genl socket
All subcommands which are using the netlink_get_info helper are already creating state object with batadv genl socket. It is not necessary to create a new one just to request data from the kernel.
Signed-off-by: Sven Eckelmann sven@narfation.org
49355f2f52e62691c112cc573cefab9c3b4527e3 gateways.c | 3 +-- mcast_flags.c | 3 +-- netlink.c | 40 +++++++++++++--------------------------- netlink.h | 2 +- originators.c | 3 +-- 5 files changed, 17 insertions(+), 34 deletions(-)
diff --git a/gateways.c b/gateways.c index 7625bd8..bdd6795 100644 --- a/gateways.c +++ b/gateways.c @@ -122,8 +122,7 @@ static int netlink_print_gateways(struct state *state, char *orig_iface,
/* only parse routing algorithm name */ last_err = -EINVAL; - info_header = netlink_get_info(state->mesh_ifindex, - BATADV_CMD_GET_ORIGINATORS, NULL); + info_header = netlink_get_info(state, BATADV_CMD_GET_ORIGINATORS, NULL); free(info_header);
if (strlen(algo_name_buf) == 0) diff --git a/mcast_flags.c b/mcast_flags.c index 721f549..44344e0 100644 --- a/mcast_flags.c +++ b/mcast_flags.c @@ -104,8 +104,7 @@ static int netlink_print_mcast_flags(struct state *state, char *orig_iface, int ret;
/* only parse own multicast flags */ - info_header = netlink_get_info(state->mesh_ifindex, - BATADV_CMD_GET_MCAST_FLAGS, NULL); + info_header = netlink_get_info(state, BATADV_CMD_GET_MCAST_FLAGS, NULL); free(info_header);
if (mcast_flags == -EOPNOTSUPP || mcast_flags_priv == -EOPNOTSUPP) diff --git a/netlink.c b/netlink.c index 31c9b01..e3a7b7c 100644 --- a/netlink.c +++ b/netlink.c @@ -339,60 +339,46 @@ static int info_callback(struct nl_msg *msg, void *arg) opts->remaining_header = NULL; }
- return NL_STOP; + return NL_OK; }
-char *netlink_get_info(int ifindex, uint8_t nl_cmd, const char *header) +char *netlink_get_info(struct state *state, uint8_t nl_cmd, const char *header) { - struct nl_sock *sock; struct nl_msg *msg; struct nl_cb *cb; - int family; struct print_opts opts = { .read_opt = 0, .nl_cmd = nl_cmd, .remaining_header = NULL, .static_header = header, }; - - sock = nl_socket_alloc(); - if (!sock) - return NULL; - - genl_connect(sock); - - family = genl_ctrl_resolve(sock, BATADV_NL_NAME); - if (family < 0) { - nl_socket_free(sock); - return NULL; - } + int ret;
msg = nlmsg_alloc(); - if (!msg) { - nl_socket_free(sock); + if (!msg) return NULL; - }
- genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, 0, + genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, state->batadv_family, 0, 0, BATADV_CMD_GET_MESH_INFO, 1);
- nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, ifindex); + nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, state->mesh_ifindex);
- nl_send_auto_complete(sock, msg); + nl_send_auto_complete(state->sock, msg);
nlmsg_free(msg);
cb = nl_cb_alloc(NL_CB_DEFAULT); if (!cb) - goto err_free_sock; + return NULL;
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, info_callback, &opts); nl_cb_err(cb, NL_CB_CUSTOM, netlink_print_error, NULL);
- nl_recvmsgs(sock, cb); + ret = nl_recvmsgs(state->sock, cb); + if (ret < 0) + return opts.remaining_header;
-err_free_sock: - nl_socket_free(sock); + nl_wait_for_ack(state->sock);
return opts.remaining_header; } @@ -458,7 +444,7 @@ int netlink_print_common(struct state *state, char *orig_iface, int read_opt, printf("\033[2J\033[0;0f");
if (!(read_opt & SKIP_HEADER)) - opts.remaining_header = netlink_get_info(state->mesh_ifindex, + opts.remaining_header = netlink_get_info(state, nl_cmd, header);
diff --git a/netlink.h b/netlink.h index 4ee2f39..48a2a23 100644 --- a/netlink.h +++ b/netlink.h @@ -30,7 +30,7 @@ struct ether_addr; int netlink_create(struct state *state); void netlink_destroy(struct state *state);
-char *netlink_get_info(int ifindex, uint8_t nl_cmd, const char *header); +char *netlink_get_info(struct state *state, uint8_t nl_cmd, const char *header); int translate_mac_netlink(const char *mesh_iface, const struct ether_addr *mac, struct ether_addr *mac_out); int get_nexthop_netlink(const char *mesh_iface, const struct ether_addr *mac, diff --git a/originators.c b/originators.c index 8a29dd7..a8b313e 100644 --- a/originators.c +++ b/originators.c @@ -174,8 +174,7 @@ static int netlink_print_originators(struct state *state, char *orig_iface,
/* only parse routing algorithm name */ last_err = -EINVAL; - info_header = netlink_get_info(state->mesh_ifindex, - BATADV_CMD_GET_ORIGINATORS, NULL); + info_header = netlink_get_info(state, BATADV_CMD_GET_ORIGINATORS, NULL); free(info_header);
if (strlen(algo_name_buf) == 0)