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[simulation] allow specify local host (#9925)

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This commit adds a argument `-L`/`--local-host` to simulation platform
to specify the source IP address for packets simulating 15.4
frames. This allows the simulation packets being transmitted over
different network interfaces, so that the simulation can run on
different hosts.

This can be used to enable multiple emulation devices(e.g. Android
Virtual Device) communicating to each other over emulated Thread
radio.

The argument accepts either an IPv4 address or a network interface
name. In the latter case, the first found IPv4 address on that
interface will be used will be used.
This commit is contained in:
Yakun Xu
2024-03-13 11:42:53 -07:00
committed by GitHub
parent cf6dcc5bc7
commit 3ebc3d3a06
4 changed files with 116 additions and 4 deletions
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examples/platforms/simulation/simul_utils.c
+4 -2
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@@ -36,6 +36,8 @@
#define UTILS_SOCKET_LOCAL_HOST_ADDR "127.0.0.1"
#define UTILS_SOCKET_GROUP_ADDR "224.0.0.116"
const char *gLocalHost = UTILS_SOCKET_LOCAL_HOST_ADDR;
void utilsAddFdToFdSet(int aFd, fd_set *aFdSet, int *aMaxFd)
{
otEXPECT(aFd >= 0);
@@ -75,7 +77,7 @@ void utilsInitSocket(utilsSocket *aSocket, uint16_t aPortBase)
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(aSocket->mPort);
sockaddr.sin_addr.s_addr = inet_addr(UTILS_SOCKET_LOCAL_HOST_ADDR);
sockaddr.sin_addr.s_addr = inet_addr(gLocalHost);
rval = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &sockaddr.sin_addr, sizeof(sockaddr.sin_addr));
otEXPECT_ACTION(rval != -1, perror("setsockopt(TxFd, IP_MULTICAST_IF)"));
@@ -103,7 +105,7 @@ void utilsInitSocket(utilsSocket *aSocket, uint16_t aPortBase)
memset(&mreq, 0, sizeof(mreq));
inet_pton(AF_INET, UTILS_SOCKET_GROUP_ADDR, &mreq.imr_multiaddr);
mreq.imr_address.s_addr = inet_addr(UTILS_SOCKET_LOCAL_HOST_ADDR);
mreq.imr_address.s_addr = inet_addr(gLocalHost);
rval = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mreq.imr_address, sizeof(mreq.imr_address));
otEXPECT_ACTION(rval != -1, perror("setsockopt(RxFd, IP_MULTICAST_IF)"));