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IB/srp: Fix IPv6 address parsing 

Split IPv6 addresses at the colon that separates the IPv6 address
and the port number instead of at a colon in the middle of the IPv6
address. Check whether the IPv6 address is surrounded with square
brackets.

Fixes: 19f313438c ("IB/srp: Add RDMA/CM support")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2018-03-12 13:55:55 -07:00 committed by Doug Ledford
parent 19b1f54099
commit c62adb7def
1 changed files with 23 additions and 4 deletions
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27
drivers/infiniband/ulp/srp/ib_srp.c
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@ -3414,18 +3414,37 @@ static const match_table_t srp_opt_tokens = {
{ SRP_OPT_ERR, NULL } { SRP_OPT_ERR, NULL }
}; };
/**
* srp_parse_in - parse an IP address and port number combination
*
* Parse the following address formats:
* - IPv4: <ip_address>:<port>, e.g. 1.2.3.4:5.
* - IPv6: \[<ipv6_address>\]:<port>, e.g. [1::2:3%4]:5.
*/
static int srp_parse_in(struct net *net, struct sockaddr_storage *sa, static int srp_parse_in(struct net *net, struct sockaddr_storage *sa,
const char *addr_port_str) const char *addr_port_str)
{ {
char *addr = kstrdup(addr_port_str, GFP_KERNEL); char *addr_end, *addr = kstrdup(addr_port_str, GFP_KERNEL);
char *port_str = addr; char *port_str;
int ret; int ret;
if (!addr) if (!addr)
return -ENOMEM; return -ENOMEM;
strsep(&port_str, ":"); port_str = strrchr(addr, ':');
ret = inet_pton_with_scope(net, AF_UNSPEC, addr, port_str, sa); if (!port_str)
return -EINVAL;
*port_str++ = '\0';
ret = inet_pton_with_scope(net, AF_INET, addr, port_str, sa);
if (ret && addr[0]) {
addr_end = addr + strlen(addr) - 1;
if (addr[0] == '[' && *addr_end == ']') {
*addr_end = '\0';
ret = inet_pton_with_scope(net, AF_INET6, addr + 1,
port_str, sa);
}
}
kfree(addr); kfree(addr);
pr_debug("%s -> %pISpfsc\n", addr_port_str, sa);
return ret; return ret;
} }