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http://git.haproxy.org/git/haproxy.git/
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MEDIUM: proxy_protocol: Convert IPs to v6 when protocols are mixed
http-request set-src possibly creates a situation where src and dst are from different address families. Convert both addresses to IPv6 to avoid a PROXY UNKNOWN. This patch should be backported to haproxy 1.8.
This commit is contained in:
Tim Duesterhus
Willy Tarreau
parent
c477b6fcc9
commit
7fec021537
191
src/connection.c
191
src/connection.c
@ -964,73 +964,71 @@ int make_proxy_line(char *buf, int buf_len, struct server *srv, struct connectio
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int make_proxy_line_v1(char *buf, int buf_len, struct sockaddr_storage *src, struct sockaddr_storage *dst)
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{
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int ret = 0;
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char * protocol;
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char src_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)];
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char dst_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)];
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in_port_t src_port;
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in_port_t dst_port;
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if (src && dst && src->ss_family == dst->ss_family && src->ss_family == AF_INET) {
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ret = snprintf(buf + ret, buf_len - ret, "PROXY TCP4 ");
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if (ret >= buf_len)
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return 0;
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/* IPv4 src */
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if (!inet_ntop(src->ss_family, &((struct sockaddr_in *)src)->sin_addr, buf + ret, buf_len - ret))
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return 0;
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ret += strlen(buf + ret);
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if (ret >= buf_len)
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return 0;
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buf[ret++] = ' ';
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/* IPv4 dst */
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if (!inet_ntop(dst->ss_family, &((struct sockaddr_in *)dst)->sin_addr, buf + ret, buf_len - ret))
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return 0;
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ret += strlen(buf + ret);
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if (ret >= buf_len)
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return 0;
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/* source and destination ports */
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ret += snprintf(buf + ret, buf_len - ret, " %u %u\r\n",
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ntohs(((struct sockaddr_in *)src)->sin_port),
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ntohs(((struct sockaddr_in *)dst)->sin_port));
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if (ret >= buf_len)
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return 0;
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}
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else if (src && dst && src->ss_family == dst->ss_family && src->ss_family == AF_INET6) {
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ret = snprintf(buf + ret, buf_len - ret, "PROXY TCP6 ");
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if (ret >= buf_len)
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return 0;
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/* IPv6 src */
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if (!inet_ntop(src->ss_family, &((struct sockaddr_in6 *)src)->sin6_addr, buf + ret, buf_len - ret))
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return 0;
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ret += strlen(buf + ret);
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if (ret >= buf_len)
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return 0;
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buf[ret++] = ' ';
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/* IPv6 dst */
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if (!inet_ntop(dst->ss_family, &((struct sockaddr_in6 *)dst)->sin6_addr, buf + ret, buf_len - ret))
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return 0;
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ret += strlen(buf + ret);
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if (ret >= buf_len)
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return 0;
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/* source and destination ports */
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ret += snprintf(buf + ret, buf_len - ret, " %u %u\r\n",
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ntohs(((struct sockaddr_in6 *)src)->sin6_port),
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ntohs(((struct sockaddr_in6 *)dst)->sin6_port));
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if (ret >= buf_len)
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return 0;
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}
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else {
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if ( !src
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|| !dst
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|| (src->ss_family != AF_INET && src->ss_family != AF_INET6)
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|| (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) {
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/* unknown family combination */
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ret = snprintf(buf, buf_len, "PROXY UNKNOWN\r\n");
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if (ret >= buf_len)
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return 0;
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return ret;
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}
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/* IPv4 for both src and dst */
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if (src->ss_family == AF_INET && dst->ss_family == AF_INET) {
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protocol = "TCP4";
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if (!inet_ntop(AF_INET, &((struct sockaddr_in *)src)->sin_addr, src_str, sizeof(src_str)))
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return 0;
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src_port = ((struct sockaddr_in *)src)->sin_port;
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if (!inet_ntop(AF_INET, &((struct sockaddr_in *)dst)->sin_addr, dst_str, sizeof(dst_str)))
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return 0;
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dst_port = ((struct sockaddr_in *)dst)->sin_port;
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}
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/* IPv6 for at least one of src and dst */
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else {
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struct in6_addr tmp;
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protocol = "TCP6";
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if (src->ss_family == AF_INET) {
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/* Convert src to IPv6 */
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v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr);
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src_port = ((struct sockaddr_in *)src)->sin_port;
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}
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else {
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tmp = ((struct sockaddr_in6 *)src)->sin6_addr;
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src_port = ((struct sockaddr_in6 *)src)->sin6_port;
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}
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if (!inet_ntop(AF_INET6, &tmp, src_str, sizeof(src_str)))
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return 0;
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if (dst->ss_family == AF_INET) {
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/* Convert dst to IPv6 */
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v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr);
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dst_port = ((struct sockaddr_in *)dst)->sin_port;
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}
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else {
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tmp = ((struct sockaddr_in6 *)dst)->sin6_addr;
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dst_port = ((struct sockaddr_in6 *)dst)->sin6_port;
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}
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if (!inet_ntop(AF_INET6, &tmp, dst_str, sizeof(dst_str)))
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return 0;
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}
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ret = snprintf(buf, buf_len, "PROXY %s %s %s %u %u\r\n", protocol, src_str, dst_str, ntohs(src_port), ntohs(dst_port));
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if (ret >= buf_len)
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return 0;
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return ret;
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}
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@ -1071,35 +1069,60 @@ int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connec
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dst = &remote->addr.to;
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}
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if (src && dst && src->ss_family == dst->ss_family && src->ss_family == AF_INET) {
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if (buf_len < PP2_HDR_LEN_INET)
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return 0;
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hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY;
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hdr->fam = PP2_FAM_INET | PP2_TRANS_STREAM;
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hdr->addr.ip4.src_addr = ((struct sockaddr_in *)src)->sin_addr.s_addr;
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hdr->addr.ip4.dst_addr = ((struct sockaddr_in *)dst)->sin_addr.s_addr;
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hdr->addr.ip4.src_port = ((struct sockaddr_in *)src)->sin_port;
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hdr->addr.ip4.dst_port = ((struct sockaddr_in *)dst)->sin_port;
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ret = PP2_HDR_LEN_INET;
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}
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else if (src && dst && src->ss_family == dst->ss_family && src->ss_family == AF_INET6) {
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if (buf_len < PP2_HDR_LEN_INET6)
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return 0;
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hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY;
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hdr->fam = PP2_FAM_INET6 | PP2_TRANS_STREAM;
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memcpy(hdr->addr.ip6.src_addr, &((struct sockaddr_in6 *)src)->sin6_addr, 16);
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memcpy(hdr->addr.ip6.dst_addr, &((struct sockaddr_in6 *)dst)->sin6_addr, 16);
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hdr->addr.ip6.src_port = ((struct sockaddr_in6 *)src)->sin6_port;
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hdr->addr.ip6.dst_port = ((struct sockaddr_in6 *)dst)->sin6_port;
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ret = PP2_HDR_LEN_INET6;
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}
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else {
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/* At least one of src or dst is not of AF_INET or AF_INET6 */
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if ( !src
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|| !dst
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|| (src->ss_family != AF_INET && src->ss_family != AF_INET6)
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|| (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) {
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if (buf_len < PP2_HDR_LEN_UNSPEC)
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return 0;
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hdr->ver_cmd = PP2_VERSION | PP2_CMD_LOCAL;
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hdr->fam = PP2_FAM_UNSPEC | PP2_TRANS_UNSPEC;
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ret = PP2_HDR_LEN_UNSPEC;
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}
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else {
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/* IPv4 for both src and dst */
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if (src->ss_family == AF_INET && dst->ss_family == AF_INET) {
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if (buf_len < PP2_HDR_LEN_INET)
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return 0;
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hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY;
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hdr->fam = PP2_FAM_INET | PP2_TRANS_STREAM;
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hdr->addr.ip4.src_addr = ((struct sockaddr_in *)src)->sin_addr.s_addr;
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hdr->addr.ip4.src_port = ((struct sockaddr_in *)src)->sin_port;
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hdr->addr.ip4.dst_addr = ((struct sockaddr_in *)dst)->sin_addr.s_addr;
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hdr->addr.ip4.dst_port = ((struct sockaddr_in *)dst)->sin_port;
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ret = PP2_HDR_LEN_INET;
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}
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/* IPv6 for at least one of src and dst */
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else {
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struct in6_addr tmp;
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if (buf_len < PP2_HDR_LEN_INET6)
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return 0;
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hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY;
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hdr->fam = PP2_FAM_INET6 | PP2_TRANS_STREAM;
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if (src->ss_family == AF_INET) {
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v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr);
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memcpy(hdr->addr.ip6.src_addr, &tmp, 16);
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hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port;
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}
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else {
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memcpy(hdr->addr.ip6.src_addr, &((struct sockaddr_in6 *)src)->sin6_addr, 16);
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hdr->addr.ip6.src_port = ((struct sockaddr_in6 *)src)->sin6_port;
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}
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if (dst->ss_family == AF_INET) {
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v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr);
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memcpy(hdr->addr.ip6.dst_addr, &tmp, 16);
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hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port;
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}
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else {
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memcpy(hdr->addr.ip6.dst_addr, &((struct sockaddr_in6 *)dst)->sin6_addr, 16);
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hdr->addr.ip6.dst_port = ((struct sockaddr_in6 *)dst)->sin6_port;
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}
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ret = PP2_HDR_LEN_INET6;
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}
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}
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if (srv->pp_opts & SRV_PP_V2_CRC32C) {
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uint32_t zero_crc32c = 0;
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