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Yet another major rework of the BusyBox config system, using the considerably
[oweals/busybox.git] / networking / libiproute / libnetlink.c
diff --git a/networking/libiproute/libnetlink.c b/networking/libiproute/libnetlink.c
index a1f39d409521a7c3f38f08b4684e140b1e126b6a..99672382aa1c887f43b0af07a26b7089af5445d8 100644 (file)
--- a/networking/libiproute/libnetlink.c
+++ b/networking/libiproute/libnetlink.c
@@ -24,6 +24,7 @@
 #include <sys/uio.h>
 
 #include "libnetlink.h"
+#include "libbb.h"
 
 void rtnl_close(struct rtnl_handle *rth)
 {
@@ -38,7 +39,7 @@ int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
 
        rth->fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
        if (rth->fd < 0) {
-               perror("Cannot open netlink socket");
+               perror_msg("Cannot open netlink socket");
                return -1;
        }
 
@@ -47,20 +48,20 @@ int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
        rth->local.nl_groups = subscriptions;
 
        if (bind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local)) < 0) {
-               perror("Cannot bind netlink socket");
+               perror_msg("Cannot bind netlink socket");
                return -1;
        }
        addr_len = sizeof(rth->local);
        if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0) {
-               perror("Cannot getsockname");
+               perror_msg("Cannot getsockname");
                return -1;
        }
        if (addr_len != sizeof(rth->local)) {
-               fprintf(stderr, "Wrong address length %d\n", addr_len);
+               error_msg("Wrong address length %d", addr_len);
                return -1;
        }
        if (rth->local.nl_family != AF_NETLINK) {
-               fprintf(stderr, "Wrong address family %d\n", rth->local.nl_family);
+               error_msg("Wrong address family %d", rth->local.nl_family);
                return -1;
        }
        rth->seq = time(NULL);
@@ -148,16 +149,15 @@ int rtnl_dump_filter(struct rtnl_handle *rth,
                if (status < 0) {
                        if (errno == EINTR)
                                continue;
-                       perror("OVERRUN");
+                       perror_msg("OVERRUN");
                        continue;
                }
                if (status == 0) {
-                       fprintf(stderr, "EOF on netlink\n");
+                       error_msg("EOF on netlink");
                        return -1;
                }
                if (msg.msg_namelen != sizeof(nladdr)) {
-                       fprintf(stderr, "sender address length == %d\n", msg.msg_namelen);
-                       exit(1);
+                       error_msg_and_die("sender address length == %d", msg.msg_namelen);
                }
 
                h = (struct nlmsghdr*)buf;
@@ -168,38 +168,40 @@ int rtnl_dump_filter(struct rtnl_handle *rth,
                            h->nlmsg_seq != rth->dump) {
                                if (junk) {
                                        err = junk(&nladdr, h, arg2);
-                                       if (err < 0)
+                                       if (err < 0) {
                                                return err;
+                                       }
                                }
                                goto skip_it;
                        }
 
-                       if (h->nlmsg_type == NLMSG_DONE)
+                       if (h->nlmsg_type == NLMSG_DONE) {
                                return 0;
+                       }
                        if (h->nlmsg_type == NLMSG_ERROR) {
-                               struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
+                               struct nlmsgerr *l_err = (struct nlmsgerr*)NLMSG_DATA(h);
                                if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
-                                       fprintf(stderr, "ERROR truncated\n");
+                                       error_msg("ERROR truncated");
                                } else {
-                                       errno = -err->error;
-                                       perror("RTNETLINK answers");
+                                       errno = -l_err->error;
+                                       perror_msg("RTNETLINK answers");
                                }
                                return -1;
                        }
                        err = filter(&nladdr, h, arg1);
-                       if (err < 0)
+                       if (err < 0) {
                                return err;
+                       }
 
 skip_it:
                        h = NLMSG_NEXT(h, status);
                }
                if (msg.msg_flags & MSG_TRUNC) {
-                       fprintf(stderr, "Message truncated\n");
+                       error_msg("Message truncated");
                        continue;
                }
                if (status) {
-                       fprintf(stderr, "!!!Remnant of size %d\n", status);
-                       exit(1);
+                       error_msg_and_die("!!!Remnant of size %d", status);
                }
        }
 }
@@ -228,13 +230,13 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
        nladdr.nl_groups = groups;
 
        n->nlmsg_seq = seq = ++rtnl->seq;
-       if (answer == NULL)
+       if (answer == NULL) {
                n->nlmsg_flags |= NLM_F_ACK;
-
+       }
        status = sendmsg(rtnl->fd, &msg, 0);
 
        if (status < 0) {
-               perror("Cannot talk to rtnetlink");
+               perror_msg("Cannot talk to rtnetlink");
                return -1;
        }
 
@@ -245,39 +247,39 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
                status = recvmsg(rtnl->fd, &msg, 0);
 
                if (status < 0) {
-                       if (errno == EINTR)
+                       if (errno == EINTR) {
                                continue;
-                       perror("OVERRUN");
+                       }
+                       perror_msg("OVERRUN");
                        continue;
                }
                if (status == 0) {
-                       fprintf(stderr, "EOF on netlink\n");
+                       error_msg("EOF on netlink");
                        return -1;
                }
                if (msg.msg_namelen != sizeof(nladdr)) {
-                       fprintf(stderr, "sender address length == %d\n", msg.msg_namelen);
-                       exit(1);
+                       error_msg_and_die("sender address length == %d", msg.msg_namelen);
                }
                for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
-                       int err;
+                       int l_err;
                        int len = h->nlmsg_len;
                        int l = len - sizeof(*h);
 
                        if (l<0 || len>status) {
                                if (msg.msg_flags & MSG_TRUNC) {
-                                       fprintf(stderr, "Truncated message\n");
+                                       error_msg("Truncated message");
                                        return -1;
                                }
-                               fprintf(stderr, "!!!malformed message: len=%d\n", len);
-                               exit(1);
+                               error_msg_and_die("!!!malformed message: len=%d", len);
                        }
 
                        if (h->nlmsg_pid != rtnl->local.nl_pid ||
                            h->nlmsg_seq != seq) {
                                if (junk) {
-                                       err = junk(&nladdr, h, jarg);
-                                       if (err < 0)
-                                               return err;
+                                       l_err = junk(&nladdr, h, jarg);
+                                       if (l_err < 0) {
+                                               return l_err;
+                                       }
                                }
                                continue;
                        }
@@ -285,15 +287,16 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
                        if (h->nlmsg_type == NLMSG_ERROR) {
                                struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
                                if (l < sizeof(struct nlmsgerr)) {
-                                       fprintf(stderr, "ERROR truncated\n");
+                                       error_msg("ERROR truncated");
                                } else {
                                        errno = -err->error;
                                        if (errno == 0) {
-                                               if (answer)
+                                               if (answer) {
                                                        memcpy(answer, h, h->nlmsg_len);
+                                               }
                                                return 0;
                                        }
-                                       perror("RTNETLINK answers");
+                                       perror_msg("RTNETLINK answers");
                                }
                                return -1;
                        }
@@ -302,18 +305,17 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
                                return 0;
                        }
 
-                       fprintf(stderr, "Unexpected reply!!!\n");
+                       error_msg("Unexpected reply!!!");
 
                        status -= NLMSG_ALIGN(len);
                        h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
                }
                if (msg.msg_flags & MSG_TRUNC) {
-                       fprintf(stderr, "Message truncated\n");
+                       error_msg("Message truncated");
                        continue;
                }
                if (status) {
-                       fprintf(stderr, "!!!Remnant of size %d\n", status);
-                       exit(1);
+                       error_msg_and_die("!!!Remnant of size %d", status);
                }
        }
 }
@@ -349,16 +351,15 @@ int rtnl_listen(struct rtnl_handle *rtnl,
                if (status < 0) {
                        if (errno == EINTR)
                                continue;
-                       perror("OVERRUN");
+                       perror_msg("OVERRUN");
                        continue;
                }
                if (status == 0) {
-                       fprintf(stderr, "EOF on netlink\n");
+                       error_msg("EOF on netlink");
                        return -1;
                }
                if (msg.msg_namelen != sizeof(nladdr)) {
-                       fprintf(stderr, "Sender address length == %d\n", msg.msg_namelen);
-                       exit(1);
+                       error_msg_and_die("Sender address length == %d", msg.msg_namelen);
                }
                for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
                        int err;
@@ -367,27 +368,26 @@ int rtnl_listen(struct rtnl_handle *rtnl,
 
                        if (l<0 || len>status) {
                                if (msg.msg_flags & MSG_TRUNC) {
-                                       fprintf(stderr, "Truncated message\n");
+                                       error_msg("Truncated message");
                                        return -1;
                                }
-                               fprintf(stderr, "!!!malformed message: len=%d\n", len);
-                               exit(1);
+                               error_msg_and_die("!!!malformed message: len=%d", len);
                        }
 
                        err = handler(&nladdr, h, jarg);
-                       if (err < 0)
+                       if (err < 0) {
                                return err;
+                       }
 
                        status -= NLMSG_ALIGN(len);
                        h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
                }
                if (msg.msg_flags & MSG_TRUNC) {
-                       fprintf(stderr, "Message truncated\n");
+                       error_msg("Message truncated");
                        continue;
                }
                if (status) {
-                       fprintf(stderr, "!!!Remnant of size %d\n", status);
-                       exit(1);
+                       error_msg_and_die("!!!Remnant of size %d", status);
                }
        }
 }
@@ -415,7 +415,7 @@ int rtnl_from_file(FILE *rtnl,
                if (status < 0) {
                        if (errno == EINTR)
                                continue;
-                       perror("rtnl_from_file: fread");
+                       perror_msg("rtnl_from_file: fread");
                        return -1;
                }
                if (status == 0)
@@ -426,7 +426,7 @@ int rtnl_from_file(FILE *rtnl,
                l = len - sizeof(*h);
 
                if (l<0 || len>sizeof(buf)) {
-                       fprintf(stderr, "!!!malformed message: len=%d @%lu\n",
+                       error_msg("!!!malformed message: len=%d @%lu",
                                len, ftell(rtnl));
                        return -1;
                }
@@ -434,11 +434,11 @@ int rtnl_from_file(FILE *rtnl,
                status = fread(NLMSG_DATA(h), 1, NLMSG_ALIGN(l), rtnl);
 
                if (status < 0) {
-                       perror("rtnl_from_file: fread");
+                       perror_msg("rtnl_from_file: fread");
                        return -1;
                }
                if (status < l) {
-                       fprintf(stderr, "rtnl-from_file: truncated message\n");
+                       error_msg("rtnl-from_file: truncated message");
                        return -1;
                }
 
@@ -482,8 +482,9 @@ int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data)
        int len = RTA_LENGTH(4);
        struct rtattr *subrta;
 
-       if (RTA_ALIGN(rta->rta_len) + len > maxlen)
+       if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
                return -1;
+       }
        subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
        subrta->rta_type = type;
        subrta->rta_len = len;
@@ -497,8 +498,9 @@ int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen
        struct rtattr *subrta;
        int len = RTA_LENGTH(alen);
 
-       if (RTA_ALIGN(rta->rta_len) + len > maxlen)
+       if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
                return -1;
+       }
        subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len));
        subrta->rta_type = type;
        subrta->rta_len = len;
@@ -511,11 +513,13 @@ int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen
 int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
 {
        while (RTA_OK(rta, len)) {
-               if (rta->rta_type <= max)
+               if (rta->rta_type <= max) {
                        tb[rta->rta_type] = rta;
+               }
                rta = RTA_NEXT(rta,len);
        }
-       if (len)
-               fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len);
+       if (len) {
+               error_msg("!!!Deficit %d, rta_len=%d", len, rta->rta_len);
+       }
        return 0;
 }
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