iputils: Break libsysfs dependency

iputils drops a /bin/arping with a runtime linkage against libsysfs in
/usr.  Port Fedora 17 iputils-20071127-infiniband.patch, which inlines
access previously done by libsysfs.

(From OE-Core rev: 99c482124e9f476923f6d5cf0a9e5551507f9d14)

Signed-off-by: Andy Ross <andy.ross@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 299 insertions, 2 deletions

diff --git a/meta/recipes-extended/iputils/files/arping-break-libsysfs-dependency.patch b/meta/recipes-extended/iputils/files/arping-break-libsysfs-dependency.patch
new file mode 100644
index 0000000000..37325ee0ae
--- /dev/null
+++ b/meta/recipes-extended/iputils/files/arping-break-libsysfs-dependency.patch
@@ -0,0 +1,296 @@
+arping: Break libsysfs dependency
+
+Port Fedora 17's iputils-20071127-infiniband.patch, which inlines sysfs
+access previously done by libsysfs (which is in /usr, and thus not
+usable by /bin/arping).
+
+Upstream-Status: Inappropriate [not author] 
+Signed-off-by: Andy Ross <andy.ross@windriver.com>
+---
+ Makefile |    2 +-
+ arping.c |  152 ++++++++++++++++++++++++++++++++++++++++++++------------------
+ 2 files changed, 109 insertions(+), 45 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index d9a5ca5..943f048 100644
+--- a/Makefile
++++ b/Makefile
+@@ -27,7 +27,7 @@ all: $(TARGETS)
+ 
+ 
+ tftpd: tftpd.o tftpsubs.o
+-arping: arping.o -lsysfs
++arping: arping.o
+ ping: ping.o ping_common.o
+ ping6: ping6.o ping_common.o -lresolv -lcrypto
+ ping.o ping6.o ping_common.o: ping_common.h
+diff --git a/arping.c b/arping.c
+index 13484de..6379354 100644
+--- a/arping.c
++++ b/arping.c
+@@ -32,8 +32,6 @@
+ #include <netinet/in.h>
+ #include <arpa/inet.h>
+ 
+-#include <sysfs/libsysfs.h>
+-
+ #include "SNAPSHOT.h"
+ 
+ static void usage(void) __attribute__((noreturn));
+@@ -52,14 +50,22 @@ int unicasting;
+ int s;
+ int broadcast_only;
+ 
+-struct sockaddr_storage me;
+-struct sockaddr_storage he;
++struct sockaddr_ll *me=NULL;
++struct sockaddr_ll *he=NULL;
+ 
+ struct timeval start, last;
+ 
+ int sent, brd_sent;
+ int received, brd_recv, req_recv;
+ 
++#define SYSFS_MNT_PATH          "/sys"
++#define SYSFS_CLASS             "class"
++#define SYSFS_NET               "net"
++#define SYSFS_BROADCAST         "broadcast"
++#define SYSFS_PATH_ENV          "SYSFS_PATH"
++#define SYSFS_PATH_LEN          256
++#define SOCKADDR_LEN           (2 * sizeof(struct sockaddr_ll))
++
+ #define MS_TDIFF(tv1,tv2) ( ((tv1).tv_sec-(tv2).tv_sec)*1000 + \
+                           ((tv1).tv_usec-(tv2).tv_usec)/1000 )
+ 
+@@ -166,6 +172,10 @@ void finish(void)
+                printf("\n");
+                fflush(stdout);
+        }
++
++       free(me);
++       free(he);
++
+        if (dad)
+                exit(!!received);
+        if (unsolicited)
+@@ -189,8 +199,7 @@ void catcher(void)
+                finish();
+ 
+        if ( count!=0  && (last.tv_sec==0 || MS_TDIFF(tv,last) > 500 ) ) {
+-               send_pack(s, src, dst,
+-                         (struct sockaddr_ll *)&me, (struct sockaddr_ll *)&he);
++               send_pack(s, src, dst, me, he);
+                if (count >= 0)
+                    count--;
+                if (count == 0 && unsolicited)
+@@ -239,7 +248,7 @@ int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
+                return 0;
+        if (ah->ar_pln != 4)
+                return 0;
+-       if (ah->ar_hln != ((struct sockaddr_ll *)&me)->sll_halen)
++       if (ah->ar_hln != me->sll_halen)
+                return 0;
+        if (len < sizeof(*ah) + 2*(4 + ah->ar_hln))
+                return 0;
+@@ -250,7 +259,7 @@ int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
+                        return 0;
+                if (src.s_addr != dst_ip.s_addr)
+                        return 0;
+-               if (memcmp(p+ah->ar_hln+4, ((struct sockaddr_ll *)&me)->sll_addr, ah->ar_hln))
++               if (memcmp(p+ah->ar_hln+4, me->sll_addr, ah->ar_hln))
+                        return 0;
+        } else {
+                /* DAD packet was:
+@@ -268,7 +277,7 @@ int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
+                 */
+                if (src_ip.s_addr != dst.s_addr)
+                        return 0;
+-               if (memcmp(p, ((struct sockaddr_ll *)&me)->sll_addr, ((struct sockaddr_ll *)&me)->sll_halen) == 0)
++               if (memcmp(p, me->sll_addr, me->sll_halen) == 0)
+                        return 0;
+                if (src.s_addr && src.s_addr != dst_ip.s_addr)
+                        return 0;
+@@ -284,7 +293,7 @@ int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
+                        printf("for %s ", inet_ntoa(dst_ip));
+                        s_printed = 1;
+                }
+-               if (memcmp(p+ah->ar_hln+4, ((struct sockaddr_ll *)&me)->sll_addr, ah->ar_hln)) {
++               if (memcmp(p+ah->ar_hln+4, me->sll_addr, ah->ar_hln)) {
+                        if (!s_printed)
+                                printf("for ");
+                        printf("[");
+@@ -310,40 +319,67 @@ int recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
+        if (quit_on_reply)
+                finish();
+        if(!broadcast_only) {
+-               memcpy(((struct sockaddr_ll *)&he)->sll_addr, p, ((struct sockaddr_ll *)&me)->sll_halen);
++               memcpy(he->sll_addr, p, me->sll_halen);
+                unicasting=1;
+        }
+        return 1;
+ }
+ 
+-void set_device_broadcast(char *device, unsigned char *ba, size_t balen)
++int get_sysfs_mnt_path(char *mnt_path, size_t len)
+ {
+-       struct sysfs_class_device *dev;
+-       struct sysfs_attribute *brdcast;
+-       unsigned char *p;
+-       int ch;
++        const char *sysfs_path_env;
++        int pth_len=0;
+ 
+-       dev = sysfs_open_class_device("net", device);
+-       if (!dev) {
+-               perror("sysfs_open_class_device(net)");
+-               exit(2);
+-       }
++        if (len == 0 || mnt_path == NULL)
++                return -1;
+ 
+-       brdcast = sysfs_get_classdev_attr(dev, "broadcast");
+-       if (!brdcast) {
+-               perror("sysfs_get_classdev_attr(broadcast)");
+-               exit(2);
+-       }
++        /* possible overrride of real mount path */
++        sysfs_path_env = getenv(SYSFS_PATH_ENV);
++        memset(mnt_path, 0, len);
++        strncpy(mnt_path,
++                sysfs_path_env != NULL ? sysfs_path_env : SYSFS_MNT_PATH,
++                len-1);
+ 
+-       if (sysfs_read_attribute(brdcast)) {
+-               perror("sysfs_read_attribute");
+-               exit(2);
+-       }
++        if ((pth_len = strlen(mnt_path)) > 0 && mnt_path[pth_len-1] == '/')
++                mnt_path[pth_len-1] = '\0';
++
++        return 0;
++}
++
++int make_sysfs_broadcast_path(char *broadcast_path, size_t len)
++{
++        char mnt_path[SYSFS_PATH_LEN];
++
++        if (get_sysfs_mnt_path(mnt_path, len) != 0)
++                return -1;
+ 
+-       for (p = ba, ch = 0; p < ba + balen; p++, ch += 3)
+-               *p = strtoul(brdcast->value + ch, NULL, 16);
++        snprintf(broadcast_path, len,
++                "%s/" SYSFS_CLASS "/" SYSFS_NET "/%s/" SYSFS_BROADCAST,
++                mnt_path, device);
+ 
+-       return;
++        return 0;
++}
++
++char * read_sysfs_broadcast(char *brdcast_path)
++{
++        int fd;
++        int len_to_read;
++        char *brdcast = NULL;
++
++        if ((fd = open(brdcast_path, O_RDONLY)) > -1) {
++                len_to_read = lseek(fd, 0L, SEEK_END);
++                if ((brdcast = malloc(len_to_read+1)) != NULL) {
++                        lseek(fd, 0L, SEEK_SET);
++                        memset(brdcast, 0, len_to_read+1);
++                        if (read(fd, brdcast, len_to_read) == -1) {
++                                free(brdcast);
++                                brdcast = NULL;
++                        }
++                }
++                close(fd);
++        }
++
++        return brdcast;
+ }
+ 
+ int
+@@ -361,6 +397,17 @@ main(int argc, char **argv)
+                exit(-1);
+        }
+ 
++       me = malloc(SOCKADDR_LEN);
++       if (!me) {
++               fprintf(stderr, "arping: could not allocate memory\n");
++               exit(1);
++       }
++       he = malloc(SOCKADDR_LEN);
++       if (!he) {
++               fprintf(stderr, "arping: could not allocate memory\n");
++               exit(1);
++       }
++
+        while ((ch = getopt(argc, argv, "h?bfDUAqc:w:s:I:V")) != EOF) {
+                switch(ch) {
+                case 'b':
+@@ -509,34 +556,51 @@ main(int argc, char **argv)
+                close(probe_fd);
+        };
+ 
+-       ((struct sockaddr_ll *)&me)->sll_family = AF_PACKET;
+-       ((struct sockaddr_ll *)&me)->sll_ifindex = ifindex;
+-       ((struct sockaddr_ll *)&me)->sll_protocol = htons(ETH_P_ARP);
+-       if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
++       me->sll_family = AF_PACKET;
++       me->sll_ifindex = ifindex;
++       me->sll_protocol = htons(ETH_P_ARP);
++       if (bind(s, (struct sockaddr*)me, SOCKADDR_LEN) == -1) {
+                perror("bind");
+                exit(2);
+        }
+ 
+        if (1) {
+-               socklen_t alen = sizeof(me);
+-               if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
++               socklen_t alen = SOCKADDR_LEN;
++               if (getsockname(s, (struct sockaddr*)me, &alen) == -1) {
+                        perror("getsockname");
+                        exit(2);
+                }
+        }
+-       if (((struct sockaddr_ll *)&me)->sll_halen == 0) {
++       if (me->sll_halen == 0) {
+                if (!quiet)
+                        printf("Interface \"%s\" is not ARPable (no ll address)\n", device);
+                exit(dad?0:2);
+        }
+ 
+-       he = me;
++       memcpy(he, me, SOCKADDR_LEN);
+ 
+ #if 1
+-       set_device_broadcast(device, ((struct sockaddr_ll *)&he)->sll_addr,
+-                            ((struct sockaddr_ll *)&he)->sll_halen);
++       char brdcast_path[SYSFS_PATH_LEN];
++       char *brdcast_val=NULL;
++       char *next_ch;
++
++       if (make_sysfs_broadcast_path(brdcast_path, sizeof brdcast_path) != 0) {
++               perror("sysfs attribute broadcast");
++               exit(2);
++       }
++
++       if ((brdcast_val = read_sysfs_broadcast(brdcast_path)) == NULL) {
++               perror("sysfs read broadcast value");
++               exit(2);
++       }
++
++       for (ch=0; ch<he->sll_halen; ch++) {
++               he->sll_addr[ch] = strtol(brdcast_val + (ch*3), &next_ch, 16);
++       }
++
++       free(brdcast_val);
+ #else
+-       memset(((struct sockaddr_ll *)&he)->sll_addr, -1, ((struct sockaddr_ll *)&he)->sll_halen);
++       memset(he->sll_addr, -1, he->sll_halen);
+ #endif
+ 
+        if (!quiet) {
+-- 
+1.7.10.4
+
diff --git a/meta/recipes-extended/iputils/iputils_s20101006.bb b/meta/recipes-extended/iputils/iputils_s20101006.bb
index 394ab5803c..62e2b5e364 100644
--- a/meta/recipes-extended/iputils/iputils_s20101006.bb
+++ b/meta/recipes-extended/iputils/iputils_s20101006.bb
@@ -11,9 +11,9 @@ LIC_FILES_CHKSUM = "file://ping.c;beginline=1;endline=35;md5=f9ceb201733e9a6cf8f
                     file://arping.c;beginline=1;endline=10;md5=ada2a6d06acc90f943bddf40d15e0541 \
                     file://tftpd.c;beginline=1;endline=32;md5=28834bf8a91a5b8a92755dbee709ef96 "
 
-DEPENDS = "sysfsutils openssl docbook-utils-native sgmlspl-native"
+DEPENDS = "openssl docbook-utils-native sgmlspl-native"
 
-PR = "r4"
+PR = "r5"
 
 SRC_URI = "http://www.skbuff.net/iputils/${BPN}-${PV}.tar.bz2 \
            file://debian/fix-dead-host-ping-stats.diff \
@@ -22,6 +22,7 @@ SRC_URI = "http://www.skbuff.net/iputils/${BPN}-${PV}.tar.bz2 \
            file://debian/targets.diff \
            file://debian/fix-arping-timeouts.diff \
            file://nsgmls-path-fix.patch \
+           file://arping-break-libsysfs-dependency.patch \
           "
 
 SRC_URI[md5sum] = "a36c25e9ec17e48be514dc0485e7376c"