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Add functions to join/leave v6 multicast group by netif

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Existing functions are based on IP address, but the address is used
only to look up which netif to act on. The netif-based core code is
extracted to new exported functions.

If you have a netif handle, this makes it easier to join/leave
groups, without the need to convert to IP address first only for the
mld6 code to convert back to netif.
This commit is contained in:
Erik Ekman 2015-09-30 09:55:18 +02:00 committed by goldsimon
parent 3dd0977635
commit 6cdea62638
2 changed files with 99 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
src/core/ipv6/mld6.c
View File

@ -327,7 +327,6 @@ err_t
mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
{
err_t err = ERR_VAL; /* no matching interface */
struct mld_group *group;
struct netif *netif;
u8_t match;
u8_t i;
@ -350,6 +349,31 @@ mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
}
}
if (match) {
err = mld6_joingroup_netif(netif, groupaddr);
if (err != ERR_OK) {
return err;
}
}
/* proceed to next network interface */
netif = netif->next;
}
return err;
}
/**
* Join a group on a network interface.
*
* @param netif the network interface which should join a new group.
* @param groupaddr the ipv6 address of the group to join
* @return ERR_OK if group was joined on the netif, an err_t otherwise
*/
err_t
mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr)
{
struct mld_group *group;
/* find group or create a new one if not found */
group = mld6_lookfor_group(netif, groupaddr);
@ -373,14 +397,7 @@ mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
/* Increment group use */
group->use++;
err = ERR_OK;
}
/* proceed to next network interface */
netif = netif->next;
}
return err;
return ERR_OK;
}
/**
@ -395,7 +412,6 @@ err_t
mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
{
err_t err = ERR_VAL; /* no matching interface */
struct mld_group *group;
struct netif *netif;
u8_t match;
u8_t i;
@ -418,6 +434,31 @@ mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
}
}
if (match) {
err_t res = mld6_leavegroup_netif(netif, groupaddr);
if (err != ERR_OK) {
/* Store this result if we have not yet gotten a success */
err = res;
}
}
/* proceed to next network interface */
netif = netif->next;
}
return err;
}
/**
* Leave a group on a network interface.
*
* @param netif the network interface which should leave the group.
* @param groupaddr the ipv6 address of the group to leave
* @return ERR_OK if group was left on the netif, an err_t otherwise
*/
err_t
mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr)
{
struct mld_group *group;
/* find group */
group = mld6_lookfor_group(netif, groupaddr);
@ -441,15 +482,13 @@ mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr)
/* Decrement group use */
group->use--;
}
/* Leave on this interface */
err = ERR_OK;
}
}
/* proceed to next network interface */
netif = netif->next;
/* Left group */
return ERR_OK;
}
return err;
/* Group not found */
return ERR_VAL;
}

2
src/include/lwip/mld6.h
View File

@ -105,7 +105,9 @@ void mld6_tmr(void);
struct mld_group *mld6_lookfor_group(struct netif *ifp, const ip6_addr_t *addr);
void mld6_input(struct pbuf *p, struct netif *inp);
err_t mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr);
err_t mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr);
err_t mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr);
err_t mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr);
#ifdef __cplusplus