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Better logging in recv_fds

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This commit is contained in:
topjohnwu 2023-10-31 17:40:59 -07:00
parent 19a4e11645
commit a177846044
1 changed files with 33 additions and 7 deletions
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40
native/src/core/socket.cpp
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@ -73,13 +73,27 @@ static void *recv_fds(int sockfd, char *cmsgbuf, size_t bufsz, int cnt) {
};
xrecvmsg(sockfd, &msg, MSG_WAITALL);
cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
if (msg.msg_controllen != bufsz) {
LOGE("recv_fd: msg_flags = %d, msg_controllen(%zu) != %zu\n",
msg.msg_flags, msg.msg_controllen, bufsz);
return nullptr;
}
if (msg.msg_controllen != bufsz ||
cmsg == nullptr ||
cmsg->cmsg_len != CMSG_LEN(sizeof(int) * cnt) ||
cmsg->cmsg_level != SOL_SOCKET ||
cmsg->cmsg_type != SCM_RIGHTS) {
cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg == nullptr) {
LOGE("recv_fd: cmsg == nullptr\n");
return nullptr;
}
if (cmsg->cmsg_len != CMSG_LEN(sizeof(int) * cnt)) {
LOGE("recv_fd: cmsg_len(%zu) != %zu\n", cmsg->cmsg_len, CMSG_LEN(sizeof(int) * cnt));
return nullptr;
}
if (cmsg->cmsg_level != SOL_SOCKET) {
LOGE("recv_fd: cmsg_level != SOL_SOCKET\n");
return nullptr;
}
if (cmsg->cmsg_type != SCM_RIGHTS) {
LOGE("recv_fd: cmsg_type != SCM_RIGHTS\n");
return nullptr;
}
@ -92,8 +106,11 @@ vector<int> recv_fds(int sockfd) {
// Peek fd count to allocate proper buffer
int cnt;
recv(sockfd, &cnt, sizeof(cnt), MSG_PEEK);
if (cnt == 0)
if (cnt == 0) {
// Consume data
recv(sockfd, &cnt, sizeof(cnt), MSG_WAITALL);
return results;
}
vector<char> cmsgbuf;
cmsgbuf.resize(CMSG_SPACE(sizeof(int) * cnt));
@ -109,6 +126,15 @@ vector<int> recv_fds(int sockfd) {
}
int recv_fd(int sockfd) {
// Peek fd count
int cnt;
recv(sockfd, &cnt, sizeof(cnt), MSG_PEEK);
if (cnt == 0) {
// Consume data
recv(sockfd, &cnt, sizeof(cnt), MSG_WAITALL);
return -1;
}
char cmsgbuf[CMSG_SPACE(sizeof(int))];
void *data = recv_fds(sockfd, cmsgbuf, sizeof(cmsgbuf), 1);