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Message-ID: <1471249472-2554-2-git-send-email-richard.alpe@ericsson.com>
Date: Mon, 15 Aug 2016 10:24:32 +0200
From: Richard Alpe <richard.alpe@...csson.com>
To: <netdev@...r.kernel.org>
CC: <tipc-discussion@...ts.sourceforge.net>,
Richard Alpe <richard.alpe@...csson.com>
Subject: [PATCH iproute2 v2 2/2] tipc: refactor bearer identification
Introduce a generic function (nl_add_bearer_name()) that identifies a
bearer and adds it to an existing netlink message. This reduces code
complexity and makes the code a little bit easier to maintain.
Signed-off-by: Richard Alpe <richard.alpe@...csson.com>
---
tipc/bearer.c | 313 ++++++++++++++++++++--------------------------------------
tipc/cmdl.h | 6 ++
2 files changed, 114 insertions(+), 205 deletions(-)
diff --git a/tipc/bearer.c b/tipc/bearer.c
index 30b54d9..05dabe6 100644
--- a/tipc/bearer.c
+++ b/tipc/bearer.c
@@ -29,7 +29,7 @@
static void _print_bearer_opts(void)
{
fprintf(stderr,
- "\nOPTIONS\n"
+ "OPTIONS\n"
" priority - Bearer link priority\n"
" tolerance - Bearer link tolerance\n"
" window - Bearer link window\n");
@@ -44,43 +44,27 @@ static void _print_bearer_media(void)
" eth - Ethernet\n");
}
-static void cmd_bearer_enable_l2_help(struct cmdl *cmdl)
+static void cmd_bearer_enable_l2_help(struct cmdl *cmdl, char *media)
{
fprintf(stderr,
- "Usage: %s bearer enable media MEDIA device DEVICE [OPTIONS]\n"
+ "Usage: %s bearer enable media %s device DEVICE [OPTIONS]\n"
"\nOPTIONS\n"
" domain DOMAIN - Discovery domain\n"
" priority PRIORITY - Bearer priority\n",
- cmdl->argv[0]);
+ cmdl->argv[0], media);
}
-static void cmd_bearer_enable_udp_help(struct cmdl *cmdl)
+static void cmd_bearer_enable_udp_help(struct cmdl *cmdl, char *media)
{
fprintf(stderr,
- "Usage: %s bearer enable media udp name NAME localip IP [OPTIONS]\n"
+ "Usage: %s bearer enable media %s name NAME localip IP [OPTIONS]\n"
"\nOPTIONS\n"
" domain DOMAIN - Discovery domain\n"
" priority PRIORITY - Bearer priority\n"
" localport PORT - Local UDP port (default 6118)\n"
" remoteip IP - Remote IP address\n"
" remoteport IP - Remote UDP port (default 6118)\n",
- cmdl->argv[0]);
-}
-
-static int enable_l2_bearer(struct nlmsghdr *nlh, struct opt *opts,
- struct cmdl *cmdl)
-{
- struct opt *opt;
- char id[TIPC_MAX_BEARER_NAME];
-
- if (!(opt = get_opt(opts, "device"))) {
- fprintf(stderr, "error: missing bearer device\n");
- return -EINVAL;
- }
- snprintf(id, sizeof(id), "eth:%s", opt->val);
- mnl_attr_put_strz(nlh, TIPC_NLA_BEARER_NAME, id);
-
- return 0;
+ cmdl->argv[0], media);
}
static int get_netid_cb(const struct nlmsghdr *nlh, void *data)
@@ -123,8 +107,8 @@ static int generate_multicast(short af, char *buf, int bufsize)
return 0;
}
-static int enable_udp_bearer(struct nlmsghdr *nlh, struct opt *opts,
- struct cmdl *cmdl)
+static int nl_add_udp_enable_opts(struct nlmsghdr *nlh, struct opt *opts,
+ struct cmdl *cmdl)
{
int err;
struct opt *opt;
@@ -134,7 +118,6 @@ static int enable_udp_bearer(struct nlmsghdr *nlh, struct opt *opts,
char *remport = "6118";
char *locip = NULL;
char *remip = NULL;
- char name[TIPC_MAX_BEARER_NAME];
struct addrinfo *loc = NULL;
struct addrinfo *rem = NULL;
struct addrinfo hints = {
@@ -142,22 +125,9 @@ static int enable_udp_bearer(struct nlmsghdr *nlh, struct opt *opts,
.ai_socktype = SOCK_DGRAM
};
- if (help_flag) {
- cmd_bearer_enable_udp_help(cmdl);
- /* TODO find a better error code? */
- return -EINVAL;
- }
-
- if (!(opt = get_opt(opts, "name"))) {
- fprintf(stderr, "error, udp bearer name missing\n");
- cmd_bearer_enable_udp_help(cmdl);
- return -EINVAL;
- }
- snprintf(name, sizeof(name), "udp:%s", opt->val);
-
if (!(opt = get_opt(opts, "localip"))) {
fprintf(stderr, "error, udp bearer localip missing\n");
- cmd_bearer_enable_udp_help(cmdl);
+ cmd_bearer_enable_udp_help(cmdl, "udp");
return -EINVAL;
}
locip = opt->val;
@@ -197,8 +167,6 @@ static int enable_udp_bearer(struct nlmsghdr *nlh, struct opt *opts,
return -EINVAL;
}
- mnl_attr_put_strz(nlh, TIPC_NLA_BEARER_NAME, name);
-
nest = mnl_attr_nest_start(nlh, TIPC_NLA_BEARER_UDP_OPTS);
mnl_attr_put(nlh, TIPC_NLA_UDP_LOCAL, loc->ai_addrlen, loc->ai_addr);
mnl_attr_put(nlh, TIPC_NLA_UDP_REMOTE, rem->ai_addrlen, rem->ai_addr);
@@ -210,6 +178,50 @@ static int enable_udp_bearer(struct nlmsghdr *nlh, struct opt *opts,
return 0;
}
+static int nl_add_bearer_name(struct nlmsghdr *nlh, const struct cmd *cmd,
+ struct cmdl *cmdl, struct opt *opts,
+ struct tipc_sup_media sup_media[])
+{
+ char id[TIPC_MAX_BEARER_NAME];
+ char *media;
+ char *identifier;
+ struct opt *opt;
+ struct tipc_sup_media *entry;
+
+ if (!(opt = get_opt(opts, "media"))) {
+ if (help_flag)
+ (cmd->help)(cmdl);
+ else
+ fprintf(stderr, "error, missing bearer media\n");
+ return -EINVAL;
+ }
+ media = opt->val;
+
+ for (entry = sup_media; entry->media; entry++) {
+ if (strcmp(entry->media, media))
+ continue;
+
+ if (!(opt = get_opt(opts, entry->identifier))) {
+ if (help_flag)
+ (entry->help)(cmdl, media);
+ else
+ fprintf(stderr, "error, missing bearer %s\n",
+ entry->identifier);
+ return -EINVAL;
+ }
+
+ identifier = opt->val;
+ snprintf(id, sizeof(id), "%s:%s", media, identifier);
+ mnl_attr_put_strz(nlh, TIPC_NLA_BEARER_NAME, id);
+
+ return 0;
+ }
+
+ fprintf(stderr, "error, invalid media type %s\n", media);
+
+ return -EINVAL;
+}
+
static void cmd_bearer_enable_help(struct cmdl *cmdl)
{
fprintf(stderr,
@@ -228,7 +240,6 @@ static int cmd_bearer_enable(struct nlmsghdr *nlh, const struct cmd *cmd,
struct opt *opt;
struct nlattr *nest;
char buf[MNL_SOCKET_BUFFER_SIZE];
- char *media;
struct opt opts[] = {
{ "device", NULL },
{ "domain", NULL },
@@ -241,6 +252,12 @@ static int cmd_bearer_enable(struct nlmsghdr *nlh, const struct cmd *cmd,
{ "remoteport", NULL },
{ NULL }
};
+ struct tipc_sup_media sup_media[] = {
+ { "udp", "name", cmd_bearer_enable_udp_help},
+ { "eth", "device", cmd_bearer_enable_l2_help },
+ { "ib", "device", cmd_bearer_enable_l2_help },
+ { NULL, },
+ };
if (parse_opts(opts, cmdl) < 0) {
if (help_flag)
@@ -248,15 +265,6 @@ static int cmd_bearer_enable(struct nlmsghdr *nlh, const struct cmd *cmd,
return -EINVAL;
}
- if (!(opt = get_opt(opts, "media"))) {
- if (help_flag)
- (cmd->help)(cmdl);
- else
- fprintf(stderr, "error, missing bearer media\n");
- return -EINVAL;
- }
- media = opt->val;
-
if (!(nlh = msg_init(buf, TIPC_NL_BEARER_ENABLE))) {
fprintf(stderr, "error: message initialisation failed\n");
return -1;
@@ -274,72 +282,31 @@ static int cmd_bearer_enable(struct nlmsghdr *nlh, const struct cmd *cmd,
mnl_attr_nest_end(nlh, props);
}
- if (strcmp(media, "udp") == 0) {
- if (help_flag) {
- cmd_bearer_enable_udp_help(cmdl);
- return -EINVAL;
- }
- if ((err = enable_udp_bearer(nlh, opts, cmdl)))
- return err;
- } else if ((strcmp(media, "eth") == 0) || (strcmp(media, "udp") == 0)) {
- if (help_flag) {
- cmd_bearer_enable_l2_help(cmdl);
- return -EINVAL;
- }
- if ((err = enable_l2_bearer(nlh, opts, cmdl)))
+ err = nl_add_bearer_name(nlh, cmd, cmdl, opts, sup_media);
+ if (err)
+ return err;
+
+ opt = get_opt(opts, "media");
+ if (strcmp(opt->val, "udp") == 0) {
+ err = nl_add_udp_enable_opts(nlh, opts, cmdl);
+ if (err)
return err;
- } else {
- fprintf(stderr, "error, invalid media type \"%s\"\n", media);
- return -EINVAL;
}
-
mnl_attr_nest_end(nlh, nest);
return msg_doit(nlh, NULL, NULL);
}
-static int add_l2_bearer(struct nlmsghdr *nlh, struct opt *opts)
-{
- struct opt *opt;
- char id[TIPC_MAX_BEARER_NAME];
-
- if (!(opt = get_opt(opts, "device"))) {
- fprintf(stderr, "error: missing bearer device\n");
- return -EINVAL;
- }
- snprintf(id, sizeof(id), "eth:%s", opt->val);
-
- mnl_attr_put_strz(nlh, TIPC_NLA_BEARER_NAME, id);
-
- return 0;
-}
-
-static int add_udp_bearer(struct nlmsghdr *nlh, struct opt *opts)
+static void cmd_bearer_disable_l2_help(struct cmdl *cmdl, char *media)
{
- struct opt *opt;
- char id[TIPC_MAX_BEARER_NAME];
-
- if (!(opt = get_opt(opts, "name"))) {
- fprintf(stderr, "error: missing bearer name\n");
- return -EINVAL;
- }
- snprintf(id, sizeof(id), "udp:%s", opt->val);
-
- mnl_attr_put_strz(nlh, TIPC_NLA_BEARER_NAME, id);
-
- return 0;
-}
-
-static void cmd_bearer_disable_l2_help(struct cmdl *cmdl)
-{
- fprintf(stderr, "Usage: %s bearer disable media udp device DEVICE\n",
- cmdl->argv[0]);
+ fprintf(stderr, "Usage: %s bearer disable media %s device DEVICE\n",
+ cmdl->argv[0], media);
}
-static void cmd_bearer_disable_udp_help(struct cmdl *cmdl)
+static void cmd_bearer_disable_udp_help(struct cmdl *cmdl, char *media)
{
- fprintf(stderr, "Usage: %s bearer disable media udp name NAME\n",
- cmdl->argv[0]);
+ fprintf(stderr, "Usage: %s bearer disable media %s name NAME\n",
+ cmdl->argv[0], media);
}
static void cmd_bearer_disable_help(struct cmdl *cmdl)
@@ -353,16 +320,20 @@ static int cmd_bearer_disable(struct nlmsghdr *nlh, const struct cmd *cmd,
struct cmdl *cmdl, void *data)
{
int err;
- char *media;
char buf[MNL_SOCKET_BUFFER_SIZE];
struct nlattr *nest;
- struct opt *opt;
struct opt opts[] = {
{ "device", NULL },
{ "name", NULL },
{ "media", NULL },
{ NULL }
};
+ struct tipc_sup_media sup_media[] = {
+ { "udp", "name", cmd_bearer_disable_udp_help},
+ { "eth", "device", cmd_bearer_disable_l2_help },
+ { "ib", "device", cmd_bearer_disable_l2_help },
+ { NULL, },
+ };
if (parse_opts(opts, cmdl) < 0) {
if (help_flag)
@@ -370,40 +341,15 @@ static int cmd_bearer_disable(struct nlmsghdr *nlh, const struct cmd *cmd,
return -EINVAL;
}
- if (!(opt = get_opt(opts, "media"))) {
- if (help_flag)
- (cmd->help)(cmdl);
- else
- fprintf(stderr, "error, missing bearer media\n");
- return -EINVAL;
- }
- media = opt->val;
-
if (!(nlh = msg_init(buf, TIPC_NL_BEARER_DISABLE))) {
fprintf(stderr, "error, message initialisation failed\n");
return -1;
}
nest = mnl_attr_nest_start(nlh, TIPC_NLA_BEARER);
-
- if (strcmp(media, "udp") == 0) {
- if (help_flag) {
- cmd_bearer_disable_udp_help(cmdl);
- return -EINVAL;
- }
- if ((err = add_udp_bearer(nlh, opts)))
- return err;
- } else if ((strcmp(media, "eth") == 0) || (strcmp(media, "udp") == 0)) {
- if (help_flag) {
- cmd_bearer_disable_l2_help(cmdl);
- return -EINVAL;
- }
- if ((err = add_l2_bearer(nlh, opts)))
- return err;
- } else {
- fprintf(stderr, "error, invalid media type \"%s\"\n", media);
- return -EINVAL;
- }
+ err = nl_add_bearer_name(nlh, cmd, cmdl, opts, sup_media);
+ if (err)
+ return err;
mnl_attr_nest_end(nlh, nest);
return msg_doit(nlh, NULL, NULL);
@@ -418,10 +364,10 @@ static void cmd_bearer_set_help(struct cmdl *cmdl)
_print_bearer_media();
}
-static void cmd_bearer_set_udp_help(struct cmdl *cmdl)
+static void cmd_bearer_set_udp_help(struct cmdl *cmdl, char *media)
{
- fprintf(stderr, "Usage: %s bearer set OPTION media udp name NAME\n\n",
- cmdl->argv[0]);
+ fprintf(stderr, "Usage: %s bearer set OPTION media %s name NAME\n\n",
+ cmdl->argv[0], media);
_print_bearer_opts();
}
@@ -439,17 +385,21 @@ static int cmd_bearer_set_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
int err;
int val;
int prop;
- char *media;
char buf[MNL_SOCKET_BUFFER_SIZE];
struct nlattr *props;
struct nlattr *attrs;
- struct opt *opt;
struct opt opts[] = {
{ "device", NULL },
{ "media", NULL },
{ "name", NULL },
{ NULL }
};
+ struct tipc_sup_media sup_media[] = {
+ { "udp", "name", cmd_bearer_set_udp_help},
+ { "eth", "device", cmd_bearer_set_l2_help },
+ { "ib", "device", cmd_bearer_set_l2_help },
+ { NULL, },
+ };
if (strcmp(cmd->cmd, "priority") == 0)
prop = TIPC_NLA_PROP_PRIO;
@@ -460,11 +410,6 @@ static int cmd_bearer_set_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
else
return -EINVAL;
- if (help_flag) {
- (cmd->help)(cmdl);
- return -EINVAL;
- }
-
if (cmdl->optind >= cmdl->argc) {
fprintf(stderr, "error, missing value\n");
return -EINVAL;
@@ -484,30 +429,10 @@ static int cmd_bearer_set_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
mnl_attr_put_u32(nlh, prop, val);
mnl_attr_nest_end(nlh, props);
- if (!(opt = get_opt(opts, "media"))) {
- fprintf(stderr, "error, missing media\n");
- return -EINVAL;
- }
- media = opt->val;
+ err = nl_add_bearer_name(nlh, cmd, cmdl, opts, sup_media);
+ if (err)
+ return err;
- if (strcmp(media, "udp") == 0) {
- if (help_flag) {
- cmd_bearer_set_udp_help(cmdl);
- return -EINVAL;
- }
- if ((err = add_udp_bearer(nlh, opts)))
- return err;
- } else if ((strcmp(media, "eth") == 0) || (strcmp(media, "udp") == 0)) {
- if (help_flag) {
- cmd_bearer_set_l2_help(cmdl, media);
- return -EINVAL;
- }
- if ((err = add_l2_bearer(nlh, opts)))
- return err;
- } else {
- fprintf(stderr, "error, invalid media type \"%s\"\n", media);
- return -EINVAL;
- }
mnl_attr_nest_end(nlh, attrs);
return msg_doit(nlh, NULL, NULL);
@@ -534,17 +459,17 @@ static void cmd_bearer_get_help(struct cmdl *cmdl)
_print_bearer_media();
}
-static void cmd_bearer_get_udp_help(struct cmdl *cmdl)
+static void cmd_bearer_get_udp_help(struct cmdl *cmdl, char *media)
{
- fprintf(stderr, "Usage: %s bearer get OPTION media udp name NAME\n\n",
- cmdl->argv[0]);
+ fprintf(stderr, "Usage: %s bearer get OPTION media %s name NAME\n\n",
+ cmdl->argv[0], media);
_print_bearer_opts();
}
static void cmd_bearer_get_l2_help(struct cmdl *cmdl, char *media)
{
fprintf(stderr,
- "Usage: %s bearer get [OPTION]... media %s device DEVICE\n",
+ "Usage: %s bearer get OPTION media %s device DEVICE\n",
cmdl->argv[0], media);
_print_bearer_opts();
}
@@ -579,16 +504,20 @@ static int cmd_bearer_get_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
{
int err;
int prop;
- char *media;
char buf[MNL_SOCKET_BUFFER_SIZE];
struct nlattr *attrs;
- struct opt *opt;
struct opt opts[] = {
{ "device", NULL },
{ "media", NULL },
{ "name", NULL },
{ NULL }
};
+ struct tipc_sup_media sup_media[] = {
+ { "udp", "name", cmd_bearer_get_udp_help},
+ { "eth", "device", cmd_bearer_get_l2_help },
+ { "ib", "device", cmd_bearer_get_l2_help },
+ { NULL, },
+ };
if (strcmp(cmd->cmd, "priority") == 0)
prop = TIPC_NLA_PROP_PRIO;
@@ -599,11 +528,6 @@ static int cmd_bearer_get_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
else
return -EINVAL;
- if (help_flag) {
- (cmd->help)(cmdl);
- return -EINVAL;
- }
-
if (parse_opts(opts, cmdl) < 0)
return -EINVAL;
@@ -612,31 +536,10 @@ static int cmd_bearer_get_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
return -1;
}
- if (!(opt = get_opt(opts, "media"))) {
- fprintf(stderr, "error, missing media\n");
- return -EINVAL;
- }
- media = opt->val;
-
attrs = mnl_attr_nest_start(nlh, TIPC_NLA_BEARER);
- if (strcmp(media, "udp") == 0) {
- if (help_flag) {
- cmd_bearer_get_udp_help(cmdl);
- return -EINVAL;
- }
- if ((err = add_udp_bearer(nlh, opts)))
- return err;
- } else if ((strcmp(media, "eth") == 0) || (strcmp(media, "udp") == 0)) {
- if (help_flag) {
- cmd_bearer_get_l2_help(cmdl, media);
- return -EINVAL;
- }
- if ((err = add_l2_bearer(nlh, opts)))
- return err;
- } else {
- fprintf(stderr, "error, invalid media type \"%s\"\n", media);
- return -EINVAL;
- }
+ err = nl_add_bearer_name(nlh, cmd, cmdl, opts, sup_media);
+ if (err)
+ return err;
mnl_attr_nest_end(nlh, attrs);
return msg_doit(nlh, bearer_get_cb, &prop);
diff --git a/tipc/cmdl.h b/tipc/cmdl.h
index 9f2666f..d4795cf 100644
--- a/tipc/cmdl.h
+++ b/tipc/cmdl.h
@@ -22,6 +22,12 @@ struct cmdl {
char **argv;
};
+struct tipc_sup_media {
+ char *media;
+ char *identifier;
+ void (*help)(struct cmdl *cmdl, char *media);
+};
+
struct cmd {
const char *cmd;
int (*func)(struct nlmsghdr *nlh, const struct cmd *cmd,
--
2.1.4
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