Cleanup error messages
This commit is contained in:
Glenn L McGrath
parent
8b6024449f
commit
d4de975cd2
@ -24,6 +24,7 @@
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#include <sys/uio.h>
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#include "libnetlink.h"
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#include "libbb.h"
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void rtnl_close(struct rtnl_handle *rth)
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{
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@ -38,7 +39,7 @@ int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
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rth->fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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if (rth->fd < 0) {
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perror("Cannot open netlink socket");
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perror_msg("Cannot open netlink socket");
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return -1;
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}
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@ -47,20 +48,20 @@ int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
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rth->local.nl_groups = subscriptions;
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if (bind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local)) < 0) {
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perror("Cannot bind netlink socket");
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perror_msg("Cannot bind netlink socket");
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return -1;
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}
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addr_len = sizeof(rth->local);
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if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0) {
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perror("Cannot getsockname");
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perror_msg("Cannot getsockname");
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return -1;
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}
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if (addr_len != sizeof(rth->local)) {
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fprintf(stderr, "Wrong address length %d\n", addr_len);
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error_msg("Wrong address length %d", addr_len);
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return -1;
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}
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if (rth->local.nl_family != AF_NETLINK) {
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fprintf(stderr, "Wrong address family %d\n", rth->local.nl_family);
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error_msg("Wrong address family %d", rth->local.nl_family);
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return -1;
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}
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rth->seq = time(NULL);
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@ -148,16 +149,15 @@ int rtnl_dump_filter(struct rtnl_handle *rth,
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if (status < 0) {
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if (errno == EINTR)
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continue;
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perror("OVERRUN");
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perror_msg("OVERRUN");
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continue;
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}
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if (status == 0) {
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fprintf(stderr, "EOF on netlink\n");
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error_msg("EOF on netlink");
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return -1;
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}
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if (msg.msg_namelen != sizeof(nladdr)) {
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fprintf(stderr, "sender address length == %d\n", msg.msg_namelen);
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exit(1);
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error_msg_and_die("sender address length == %d", msg.msg_namelen);
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}
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h = (struct nlmsghdr*)buf;
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@ -168,38 +168,40 @@ int rtnl_dump_filter(struct rtnl_handle *rth,
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h->nlmsg_seq != rth->dump) {
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if (junk) {
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err = junk(&nladdr, h, arg2);
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if (err < 0)
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if (err < 0) {
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return err;
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}
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}
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goto skip_it;
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}
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if (h->nlmsg_type == NLMSG_DONE)
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if (h->nlmsg_type == NLMSG_DONE) {
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return 0;
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}
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if (h->nlmsg_type == NLMSG_ERROR) {
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struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
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struct nlmsgerr *l_err = (struct nlmsgerr*)NLMSG_DATA(h);
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if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
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fprintf(stderr, "ERROR truncated\n");
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error_msg("ERROR truncated");
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} else {
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errno = -err->error;
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perror("RTNETLINK answers");
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errno = -l_err->error;
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perror_msg("RTNETLINK answers");
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}
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return -1;
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}
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err = filter(&nladdr, h, arg1);
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if (err < 0)
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if (err < 0) {
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return err;
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}
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skip_it:
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h = NLMSG_NEXT(h, status);
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}
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if (msg.msg_flags & MSG_TRUNC) {
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fprintf(stderr, "Message truncated\n");
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error_msg("Message truncated");
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continue;
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}
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if (status) {
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fprintf(stderr, "!!!Remnant of size %d\n", status);
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exit(1);
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error_msg_and_die("!!!Remnant of size %d", status);
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}
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}
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}
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@ -228,13 +230,13 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
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nladdr.nl_groups = groups;
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n->nlmsg_seq = seq = ++rtnl->seq;
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if (answer == NULL)
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if (answer == NULL) {
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n->nlmsg_flags |= NLM_F_ACK;
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}
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status = sendmsg(rtnl->fd, &msg, 0);
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if (status < 0) {
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perror("Cannot talk to rtnetlink");
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perror_msg("Cannot talk to rtnetlink");
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return -1;
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}
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@ -245,39 +247,39 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
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status = recvmsg(rtnl->fd, &msg, 0);
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if (status < 0) {
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if (errno == EINTR)
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if (errno == EINTR) {
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continue;
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perror("OVERRUN");
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}
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perror_msg("OVERRUN");
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continue;
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}
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if (status == 0) {
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fprintf(stderr, "EOF on netlink\n");
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error_msg("EOF on netlink");
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return -1;
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}
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if (msg.msg_namelen != sizeof(nladdr)) {
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fprintf(stderr, "sender address length == %d\n", msg.msg_namelen);
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exit(1);
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error_msg_and_die("sender address length == %d", msg.msg_namelen);
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}
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for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
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int err;
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int l_err;
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int len = h->nlmsg_len;
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int l = len - sizeof(*h);
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if (l<0 || len>status) {
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if (msg.msg_flags & MSG_TRUNC) {
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fprintf(stderr, "Truncated message\n");
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error_msg("Truncated message");
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return -1;
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}
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fprintf(stderr, "!!!malformed message: len=%d\n", len);
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exit(1);
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error_msg_and_die("!!!malformed message: len=%d", len);
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}
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if (h->nlmsg_pid != rtnl->local.nl_pid ||
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h->nlmsg_seq != seq) {
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if (junk) {
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err = junk(&nladdr, h, jarg);
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if (err < 0)
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return err;
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l_err = junk(&nladdr, h, jarg);
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if (l_err < 0) {
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return l_err;
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}
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}
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continue;
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}
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@ -285,15 +287,16 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
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if (h->nlmsg_type == NLMSG_ERROR) {
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struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
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if (l < sizeof(struct nlmsgerr)) {
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fprintf(stderr, "ERROR truncated\n");
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error_msg("ERROR truncated");
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} else {
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errno = -err->error;
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if (errno == 0) {
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if (answer)
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if (answer) {
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memcpy(answer, h, h->nlmsg_len);
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}
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return 0;
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}
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perror("RTNETLINK answers");
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perror_msg("RTNETLINK answers");
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}
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return -1;
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}
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@ -302,18 +305,17 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
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return 0;
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}
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fprintf(stderr, "Unexpected reply!!!\n");
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error_msg("Unexpected reply!!!");
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status -= NLMSG_ALIGN(len);
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h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
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}
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if (msg.msg_flags & MSG_TRUNC) {
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fprintf(stderr, "Message truncated\n");
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error_msg("Message truncated");
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continue;
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}
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if (status) {
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fprintf(stderr, "!!!Remnant of size %d\n", status);
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exit(1);
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error_msg_and_die("!!!Remnant of size %d", status);
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}
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}
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}
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@ -349,16 +351,15 @@ int rtnl_listen(struct rtnl_handle *rtnl,
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if (status < 0) {
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if (errno == EINTR)
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continue;
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perror("OVERRUN");
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perror_msg("OVERRUN");
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continue;
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}
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if (status == 0) {
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fprintf(stderr, "EOF on netlink\n");
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error_msg("EOF on netlink");
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return -1;
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}
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if (msg.msg_namelen != sizeof(nladdr)) {
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fprintf(stderr, "Sender address length == %d\n", msg.msg_namelen);
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exit(1);
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error_msg_and_die("Sender address length == %d", msg.msg_namelen);
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}
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for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
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int err;
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@ -367,27 +368,26 @@ int rtnl_listen(struct rtnl_handle *rtnl,
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if (l<0 || len>status) {
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if (msg.msg_flags & MSG_TRUNC) {
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fprintf(stderr, "Truncated message\n");
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error_msg("Truncated message");
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return -1;
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}
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fprintf(stderr, "!!!malformed message: len=%d\n", len);
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exit(1);
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error_msg_and_die("!!!malformed message: len=%d", len);
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}
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err = handler(&nladdr, h, jarg);
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if (err < 0)
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if (err < 0) {
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return err;
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}
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status -= NLMSG_ALIGN(len);
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h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
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}
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if (msg.msg_flags & MSG_TRUNC) {
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fprintf(stderr, "Message truncated\n");
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error_msg("Message truncated");
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continue;
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}
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if (status) {
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fprintf(stderr, "!!!Remnant of size %d\n", status);
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exit(1);
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error_msg_and_die("!!!Remnant of size %d", status);
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}
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}
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}
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@ -415,7 +415,7 @@ int rtnl_from_file(FILE *rtnl,
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if (status < 0) {
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if (errno == EINTR)
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continue;
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perror("rtnl_from_file: fread");
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perror_msg("rtnl_from_file: fread");
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return -1;
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}
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if (status == 0)
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@ -426,7 +426,7 @@ int rtnl_from_file(FILE *rtnl,
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l = len - sizeof(*h);
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if (l<0 || len>sizeof(buf)) {
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fprintf(stderr, "!!!malformed message: len=%d @%lu\n",
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error_msg("!!!malformed message: len=%d @%lu",
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len, ftell(rtnl));
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return -1;
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}
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@ -434,11 +434,11 @@ int rtnl_from_file(FILE *rtnl,
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status = fread(NLMSG_DATA(h), 1, NLMSG_ALIGN(l), rtnl);
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if (status < 0) {
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perror("rtnl_from_file: fread");
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perror_msg("rtnl_from_file: fread");
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return -1;
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}
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if (status < l) {
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fprintf(stderr, "rtnl-from_file: truncated message\n");
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error_msg("rtnl-from_file: truncated message");
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return -1;
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}
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@ -482,8 +482,9 @@ int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data)
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int len = RTA_LENGTH(4);
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struct rtattr *subrta;
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if (RTA_ALIGN(rta->rta_len) + len > maxlen)
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if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
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return -1;
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}
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subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
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subrta->rta_type = type;
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subrta->rta_len = len;
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@ -497,8 +498,9 @@ int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen
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struct rtattr *subrta;
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int len = RTA_LENGTH(alen);
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if (RTA_ALIGN(rta->rta_len) + len > maxlen)
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if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
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return -1;
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}
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subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
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subrta->rta_type = type;
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subrta->rta_len = len;
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@ -511,11 +513,13 @@ int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen
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int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
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{
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while (RTA_OK(rta, len)) {
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if (rta->rta_type <= max)
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if (rta->rta_type <= max) {
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tb[rta->rta_type] = rta;
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}
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rta = RTA_NEXT(rta,len);
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}
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if (len)
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fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len);
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if (len) {
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error_msg("!!!Deficit %d, rta_len=%d", len, rta->rta_len);
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}
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return 0;
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}
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