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Improved heap usage of lwip_getaddrinfo by only allocating one block of memory per call.

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This commit is contained in:
goldsimon 2009-10-26 09:30:50 +00:00
parent bcc87ef851
commit db259c3557
1 changed files with 12 additions and 22 deletions
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34
src/api/netdb.c
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@ -234,12 +234,6 @@ lwip_freeaddrinfo(struct addrinfo *ai)
struct addrinfo *next;
while (ai != NULL) {
if (ai->ai_addr != NULL) {
mem_free(ai->ai_addr);
}
if (ai->ai_canonname != NULL) {
mem_free(ai->ai_canonname);
}
next = ai->ai_next;
mem_free(ai);
ai = next;
@ -274,6 +268,8 @@ lwip_getaddrinfo(const char *nodename, const char *servname,
struct addrinfo *ai;
struct sockaddr_in *sa = NULL;
int port_nr = 0;
size_t total_size;
size_t namelen = 0;
if (res == NULL) {
return EAI_FAIL;
@ -303,16 +299,18 @@ lwip_getaddrinfo(const char *nodename, const char *servname,
addr.addr = htonl(INADDR_LOOPBACK);
}
ai = mem_malloc(sizeof(struct addrinfo));
total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_in);
if (nodename != NULL) {
namelen = strlen(nodename);
LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
total_size += namelen + 1;
}
ai = mem_malloc(total_size);
if (ai == NULL) {
goto memerr;
}
memset(ai, 0, sizeof(struct addrinfo));
sa = mem_malloc(sizeof(struct sockaddr_in));
if (sa == NULL) {
goto memerr;
}
memset(sa, 0, sizeof(struct sockaddr_in));
memset(ai, 0, total_size);
sa = (struct sockaddr_in*)((u8_t*)ai + sizeof(struct addrinfo));
/* set up sockaddr */
sa->sin_addr.s_addr = addr.addr;
sa->sin_family = AF_INET;
@ -328,12 +326,7 @@ lwip_getaddrinfo(const char *nodename, const char *servname,
}
if (nodename != NULL) {
/* copy nodename to canonname if specified */
size_t namelen = strlen(nodename);
LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
ai->ai_canonname = mem_malloc((mem_size_t)(namelen + 1));
if (ai->ai_canonname == NULL) {
goto memerr;
}
ai->ai_canonname = ((char*)ai + sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
MEMCPY(ai->ai_canonname, nodename, namelen);
ai->ai_canonname[namelen] = 0;
}
@ -347,9 +340,6 @@ memerr:
if (ai != NULL) {
mem_free(ai);
}
if (sa != NULL) {
mem_free(sa);
}
return EAI_MEMORY;
}