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Merge pull request #2170 from freemine/with-getaddrinfo 

replace gethostbyname with getaddrinfo
This commit is contained in:
Shengliang Guan 2020-06-07 20:01:16 +08:00 committed by GitHub
parent 606dc06d9f fe22eb50f6
commit 54e947e369
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 20 additions and 26 deletions
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46
src/util/src/tsocket.c
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@ -24,43 +24,37 @@ int taosGetFqdn(char *fqdn) {
hostname[1023] = '\0';
gethostname(hostname, 1023);
struct hostent* h;
h = gethostbyname(hostname);
if (h != NULL) {
strcpy(fqdn, h->h_name);
struct addrinfo hints = {0};
struct addrinfo *result = NULL;
hints.ai_flags = AI_CANONNAME;
getaddrinfo(hostname, NULL, &hints, &result);
if (result) {
strcpy(fqdn, result->ai_canonname);
freeaddrinfo(result);
} else {
uError("failed to get host name(%s)", strerror(errno));
code = -1;
}
// to do: free the resources
// free(h);
return code;
}
uint32_t taosGetIpFromFqdn(const char *fqdn) {
struct addrinfo hints, *servinfo, *p;
struct sockaddr_in *h;
uint32_t ip = -1;
struct addrinfo hints = {0};
struct addrinfo *result = NULL;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; // use AF_INET6 to force IPv6
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo(fqdn, "http", &hints, &servinfo) != 0) {
uError("failed to get IP from %s(%s)", fqdn, strerror(errno));
getaddrinfo(fqdn, NULL, &hints, &result);
if (result) {
struct sockaddr *sa = result->ai_addr;
struct sockaddr_in *si = (struct sockaddr_in*)sa;
struct in_addr ia = si->sin_addr;
uint32_t ip = ia.s_addr;
freeaddrinfo(result);
return ip;
} else {
return -1;
}
// to do: loop through all the results and connect to the first we can
for(p = servinfo; p != NULL; p = p->ai_next) {
h = (struct sockaddr_in *) p->ai_addr;
ip = h->sin_addr.s_addr;
}
freeaddrinfo(servinfo); // all done with this structure
return ip;
}
// Function converting an IP address string to an unsigned int.