pktgen: use %pI6c for printing IPv6 addresses

I don't know why %pI6 doesn't compress, but the format specifier is
kernel-standard, so use it.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 96 deletions

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index ff79d94b594..d41d88b53e1 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -449,7 +449,6 @@ static void pktgen_stop(struct pktgen_thread *t);
 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
 
 static unsigned int scan_ip6(const char *s, char ip[16]);
-static unsigned int fmt_ip6(char *s, const char ip[16]);
 
 /* Module parameters, defaults. */
 static int pg_count_d __read_mostly = 1000;
@@ -556,21 +555,13 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
                            pkt_dev->skb_priority);
 
         if (pkt_dev->flags & F_IPV6) {
-                char b1[128], b2[128], b3[128];
-                fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
-                fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
-                fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
                 seq_printf(seq,
-                           "     saddr: %s  min_saddr: %s  max_saddr: %s\n", b1,
-                           b2, b3);
-
-                fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
-                fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
-                fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
-                seq_printf(seq,
-                           "     daddr: %s  min_daddr: %s  max_daddr: %s\n", b1,
-                           b2, b3);
-
+                           "     saddr: %pI6c  min_saddr: %pI6c  max_saddr: %pI6c\n"
+                           "     daddr: %pI6c  min_daddr: %pI6c  max_daddr: %pI6c\n",
+                           &pkt_dev->in6_saddr,
+                           &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
+                           &pkt_dev->in6_daddr,
+                           &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
         } else {
                 seq_printf(seq,
                            "     dst_min: %s  dst_max: %s\n",
@@ -706,10 +697,9 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
                    pkt_dev->cur_src_mac_offset);
 
         if (pkt_dev->flags & F_IPV6) {
-                char b1[128], b2[128];
-                fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
-                fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
-                seq_printf(seq, "     cur_saddr: %s  cur_daddr: %s\n", b2, b1);
+                seq_printf(seq, "     cur_saddr: %pI6c  cur_daddr: %pI6c\n",
+                                &pkt_dev->cur_in6_saddr,
+                                &pkt_dev->cur_in6_daddr);
         } else
                 seq_printf(seq, "     cur_saddr: 0x%x  cur_daddr: 0x%x\n",
                            pkt_dev->cur_saddr, pkt_dev->cur_daddr);
@@ -1309,7 +1299,7 @@ static ssize_t pktgen_if_write(struct file *file,
                 buf[len] = 0;
 
                 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
-                fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
+                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
 
                 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
 
@@ -1332,7 +1322,7 @@ static ssize_t pktgen_if_write(struct file *file,
                 buf[len] = 0;
 
                 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
-                fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
+                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
 
                 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
                                &pkt_dev->min_in6_daddr);
@@ -1355,7 +1345,7 @@ static ssize_t pktgen_if_write(struct file *file,
                 buf[len] = 0;
 
                 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
-                fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
+                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
 
                 if (debug)
                         printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
@@ -1376,7 +1366,7 @@ static ssize_t pktgen_if_write(struct file *file,
                 buf[len] = 0;
 
                 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
-                fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
+                snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
 
                 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
 
@@ -2898,79 +2888,6 @@ static unsigned int scan_ip6(const char *s, char ip[16])
         return len;
 }
 
-static char tohex(char hexdigit)
-{
-        return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
-}
-
-static int fmt_xlong(char *s, unsigned int i)
-{
-        char *bak = s;
-        *s = tohex((i >> 12) & 0xf);
-        if (s != bak || *s != '0')
-                ++s;
-        *s = tohex((i >> 8) & 0xf);
-        if (s != bak || *s != '0')
-                ++s;
-        *s = tohex((i >> 4) & 0xf);
-        if (s != bak || *s != '0')
-                ++s;
-        *s = tohex(i & 0xf);
-        return s - bak + 1;
-}
-
-static unsigned int fmt_ip6(char *s, const char ip[16])
-{
-        unsigned int len;
-        unsigned int i;
-        unsigned int temp;
-        unsigned int compressing;
-        int j;
-
-        len = 0;
-        compressing = 0;
-        for (j = 0; j < 16; j += 2) {
-
-#ifdef V4MAPPEDPREFIX
-                if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
-                        inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
-                        temp = strlen(s);
-                        return len + temp;
-                }
-#endif
-                temp = ((unsigned long)(unsigned char)ip[j] << 8) +
-                    (unsigned long)(unsigned char)ip[j + 1];
-                if (temp == 0) {
-                        if (!compressing) {
-                                compressing = 1;
-                                if (j == 0) {
-                                        *s++ = ':';
-                                        ++len;
-                                }
-                        }
-                } else {
-                        if (compressing) {
-                                compressing = 0;
-                                *s++ = ':';
-                                ++len;
-                        }
-                        i = fmt_xlong(s, temp);
-                        len += i;
-                        s += i;
-                        if (j < 14) {
-                                *s++ = ':';
-                                ++len;
-                        }
-                }
-        }
-        if (compressing) {
-                *s++ = ':';
-                ++len;
-        }
-        *s = 0;
-        return len;
-}
-
 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
                                         struct pktgen_dev *pkt_dev)
 {